PIVOT

FRAME

JIG

-1-

☎

Dear Customer

Thank you for purchasing this Trend product.

We hope you enjoy many years of creative and

productive use of this product.

Please remember to return your guarantee cardwithin 14 days of purchase.

CONTENTS

TECHNICAL DATA _____________________1

SAFETY _____________________________2

� General ____________________________2

� Routing Safety _______________________3

� Additional Safety Rules for Router Cutters __3

� Using Routers In A Fixed Position _______4

� Useful Advice When Routing ____________4

ITEMS ENCLOSED ____________________5

INTRODUCTION_______________________6

� Suitable Routers______________________6

PIVOT JIG MODES_____________________7

DESCRIPTION OF PARTS_______________8

ASSEMBLY___________________________9

� Mini-Pivot & Ski Frame ________________9

� Beam Trammel Mode ________________10

OPERATION _________________________11

� Mini-Pivot Trammel Mode _____________11

� Producing Circular Disc Work Surface____12

� Setting-up Mini-Pivot Configuration ______13

� Annular Disc Work __________________14

� Simple Ski Mode ____________________14

� Guided Planing Mode ________________15

� Mounting The Workpiece ______________16

ADVANCED APPLICATION _____________17

� Mini-Pivot Mode - off centre work ____17-18

ACCESSORIES ______________________19

MAINTENANCE ______________________19

� Cleaning ___________________________19

� Lubrication _________________________19

RECYCLING _________________________19

GUARANTEE ________________________19

SPARE PARTS _______________________20

� Spare Parts List & Diagram ____________20

PIVOT FRAME JIG

If you require further technicalinformation or spare parts, please callour technical support department on 01923 224681.

The following symbols are used throughout thismanual:

Denotes risk of personal injury, loss oflife or damage to the tool in case of non-observance of the instructions in thismanual.

Denotes risk of electric shock.

Refer to the instruction manual ofyour power tool.

This unit must not be put into service until it hasbeen established that the power tool to beconnected to this unit is in compliance with98/37/EC (identified by the CE marking on the power tool).

TECHNICAL DATA

Min. cutting dia. 10mmMax. cutting dia. 320mmWeight 1.4kg

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SAFETY

Observe the safety regulations inthe instruction manual of the PowerTool to be used or connected to thisattachment. Also observe anyapplicable additional safety rules.Read the following safetyinstructions before attempting tooperate this product.

PLEASE KEEP THESEINSTRUCTIONS IN A SAFEPLACE.

The attention of UK users is drawnto The Provision and Use of WorkEquipment Regulations 1998, andany subsequent amendments.

General

■ Disconnect power tool, when notin use. Before servicing andwhen changing accessories suchas cutters. Disconnect power tooland attachment from powersupply. Ensure the machine isswitched off before plugging toolin or connecting to a powersupply.

■ Always mount the power tool,accessory or attachment inconformity with the presentinstructions.

■ Keep children and visitors away.Do not let children or visitorstouch the tool, accessory orattachment. Keep children andvisitors away from work area.

■ Make the workshop child proofwith padlock and master switch.

■ Dress properly. Do not wearloose clothing or jewellery, theycan be caught in moving parts.Rubber gloves and non-skidfootwear is recommended whenworking outdoors. Wearprotective hair covering tocontain long hair.

■ Consider working environment.Do not use the product in therain or in a damp environment.Keep work area well lit. Do notuse power tools near gasoline orflammable liquids. Keepworkshop at a comfortabletemperature so your hands arenot cold.

■ The accessory or attachmentmust be kept level and stable atall times.

■ Keep work area clean. Clutteredworkshops and benches cancause injuries

■ Use the attachment with thepower tools and accessoriesspecified in this manual only. Donot force the tool or attachmentto do a job for which it is notdesigned.

■ Secure idle tools. When not inuse, tools should be stored in adry and high or locked up place,out of reach of children.

■ For best control and safety useboth hands on the power tooland attachment. Keep bothhands away from cutting area.Always wait for the spindle andcutter to stop rotating beforemaking any adjustments.

■ Always keep guards in place andin good working order.

■ Remove any nails, staples andother metal parts from theworkpiece.

■ Maintain tools and cutters withcare. Keep cutters sharp andclean for better and saferperformance. Do not usedamaged cutters. Followinstructions for lubricating andchanging accessories. Keephandles dry, clean and free fromoil and grease.

■ Maintain accessories. Do not usedamaged accessories. Only useaccessories recommended bythe manufacturer.

■ Check damaged parts. Beforeoperation inspect theattachment, the power tool, thecable, extension cable and theplug carefully for signs ofdamage. Check for alignment ofmoving parts, binding, breakage,mounting and any otherconditions that may effect itsoperation. Have any damagerepaired by an AuthorisedService Agent before using thetool or accessory.

■ Do not use tool if switch doesnot turn it on or off. Havedefective switches replaced byan Authorised Service Agent.

■ Don't over reach. Keep properfooting and balance at all times.

■ Don�t abuse the cable. Nevercarry power tool or accessory bycord or pull it to disconnect fromthe socket. Keep cord from heat,

oil and sharp edges. Always trailthe power cord away from thework area.

■ Connect dust extractionequipment. If devices areprovided for the connection ofdust extraction and collectionfacilities, ensure these areconnected and properly used.

■ Check all fixing and fasteningnuts, bolts and screws beforeuse to ensure they are tight andsecure. Periodically check whenmachining over long periods.

■ Stay alert. Watch what you aredoing. Use common sense. Donot operate tools when you aretired, under the influence ofdrugs or alcohol.

■ Personal Protective Equipment(PPE). All PPE must meetcurrent UK and EU legislation.

■ Do not leave tools runningunattended. Do not leave tooluntil it comes to a complete stop.

■ Always clamp workpiece beingmachined securely.

Routing Safety

■ Disconnect router power tool.When not in use, beforeservicing and when changingaccessories such as cutters,disconnect router andattachment from power supply.

■ Ensure router cutter has stoppedrotating before changing it.Never use the spindle lock as abrake.

■ Remove adjusting keys andspanners. Form the habit ofchecking to see that keys andadjusting spanners are removedfrom the router tool, cutter andattachment before turning routeron. Make sure cutter can rotatefreely.

■ Check all ball bearing and bladefixing screws before use toensure they are tight and secure.Periodically check whenmachining over long periods.

■ When using a template guidebush ensure it cannot come intocontact with collet and nut.

■ Noise. Take appropriatemeasures for the protection ofhearing if the sound pressure of

PIVOT FRAME JIG

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85dB(A) is exceeded. Routingsound pressure may exceed85dB(A), so ear protection mustbe worn.

■ Eye protection. Wear safetygoggles, spectacles or visors toprotect the eyes from ejectedwaster particles.

■ Respiratory protection. Wear aface or dust mask, or poweredrespirator. Dust masks/filtersshould be changed regularly.

■ Do not switch router on with thecutter touching the workpiece.

■ The direction of routing mustalways be opposite to thecutter's direction of rotation.

■ After work, release the routerplunge and allow spindle to stoprotating before putting machinedown.

■ Check before cutting that thereare no obstructions in the path ofthe router. When cutting throughthe full thickness of theworkpiece, ensure there are noobstacles beneath workpiece,and that a sacrificial worksurface is used.

Additional Safety Rules ForRouter Cutters

■ Cutting tools are sharp. Careshould be taken when handlingthem.

■ Always use cutters with a shankdiameter corresponding to thesize of the collet installed in yourtool.

■ Always run router cutters at thespindle speed recommendedand marked accordingly. Ensurecutter has reached correct speedbefore entering workpiece.Recommended speeds can befound on the packaging, in cutterinstructions or in the TrendRouting Catalogue.

■ Always use router cutters in arouter. Router cutters must notbe used in a drill. Drill and boringbits must not be used in a router.

■ Never use cutters with adiameter exceeding themaximum diameter indicated inthe technical data.

■ Do not drop cutters or knockthem against hard objects. Donot use cutters that aredamaged.

■ Cutters should be kept clean.Resin build up should beremoved at regular intervals withResin Cleaner®. The use of a drylubricant (Trendicote® PTFE) willact as a preventative. Do not usePTFE spray on plastic parts.

■ Cutter shanks should be insertedinto the collet to the mark line onthe shank. This ensures that atleast 3/4 of the shank length isheld in the collet. Do not over-tighten the collet nut as this willscore the shank and create aweakness and fracture point.

■ Observe the correct assemblyinstructions in the routerinstruction manual for fitting thecollet and nut. Observe therouter power tool manualinstructions on fitting cutterscorrectly.

■ It is advisable to periodicallycheck the collet and collet nut. Aworn, distorted or damagedcollet can cause vibration anddamage the shank, and shouldbe replaced. Worn collet nutsshould be replaced.

■ Do not take deep cuts in onepass; take several shallow orlight passes to reduce the sideload applied to the cutter. Toodeep a cut in one pass can stallthe router.

■ Very small diameter cutters mustbe handled and used with care.

■ Always return cutter to itspackaging after use.

Using Routers In A FixedPosition

■ After work, release the routerplunge to protect the cutter.

■ Always use a push-stick or push-block for last 300mm of the cut.

■ Whenever possible use a workholding device or jig to securecomponent being machined.

■ Ensure attachment is securelyfitted to the workbench, withtable surface at approximatelyhip height.

■ Ensure a No-Volt Release Switchis fixed to or adjacent to theattachment and that it is usedcorrectly.

■ Check the direction of theworkpiece is always opposite tothe cutter's direction of rotation.

■ Do not use awkward oruncomfortable hand positions.

■ Do not reach underneath table orput your hands or fingers at anytime in the cutting path while toolis connected to a power supply.

Useful Advice WhenRouting

■ Judge your feed rate by thesound of the motor.

■ Feed the router at a constantfeed rate. Too slow a feed ratewill result in burning.

■ Take many light passes ratherthan one deep cut to reduce theside load applied to both routerand router cutter.

■ Trial cuts should be made onwaste material before startingany project.

■ When using some attachmentsincluding a router table ordovetail jig, the use of a fineheight adjuster is highlyrecommended.

■ When using a template guidebush, ensure there is sufficientclearance between cutter tip andinside each of bush. Ensurecutter and guide bush areconcentric.

Version 2.0 10/2002

PIVOT FRAME JIG

PIVOT FRAME JIG

�PIVOT

FRAME

JIG

GU

AR

AN

TE

E

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ITEMS ENCLOSED

x2

x1

x4x1

x16

x8

x1

x4

x4

x1

x1

x1

x1 x1

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PIVOT FRAME JIG

INTRODUCTION

The Pivot Frame Jig is a versatile device whichpermits the user to carry out a wide variety of routeractivities. It has four distinct modes of operation:

1. Mini-Pivot ModeIn its mini-pivot form, it allows a number of smalldiameter trammel operations to be executed,normally extremely difficult to perform, to thesame degree of accuracy and repeatability withany form of machinery normally available to thehome workshop.

2. Beam Trammel ModeConversion to a standard beam-trammel modepermits extension of the range to the maximumpermitted by the router fence-rods used.

3. Guided Ski ModeThe jig may also be used in a �ski-mode� guidedby external battens. This permits the router tobe used at a constant �ride-height� above theworkpiece (which may be set by the user). Thisfeature permits planingand thicknessing of longlengths of irregular stock timber and also anumber of guided edging and groovingoperations.

4. Freehand Ski ModeThe jig may also be used in a freehand ski-mode.In this mode, the jig will execute planing andthicknessing of relatively small stock material, butcan also be used in conjunction with a routerguide-bush and template for internal or externalprofiling operations.

In all modes the jig also functions as an anti-tipping device.

Suitable Routers

In this manual, assembly and operation of the jig isdescribed and illustrated in conjunction with theTrend T5E router.

PFJ/SET/1 can be operated directly with any of thefollowing 8mm rod diameter routers: Trend T3, T5AEG OF450S, OFE710Atlas Copco OFS50, 720, OFSE850, 1000 Black & Decker SR100 DeWalt DW613, 614, 615Draper R850VEinhell EOF850SPElu MOF 96, 96(E) Mk 1 & 2Ferm FBF-6E, FBF-8EHitachi FM8, M8, M8VHolzher 2335, 2336, 2356 Kango R8550S Nu-tool NPT850Performance Power 1020WPerles Eurotool OF808(E)Power Devil PDW5026, PDW5027Ryobi R150, R151, R155, RE155KStayer PR50Virutex FR77, 78CWickes 900W

The following machines can be used with the jig butwill not accept the fine adjuster unless a slightmodification is made:

Black & Decker BD780(E), KW779, 780(E), 800(E),850ETBosch GOF900A, 900ACEElu MOF69Makita 3620

Wherever possible use the longest rods available,i.e. Ref. ROD/8X500 are 500mm long and 8mmdiameter.

PFJ/SET/2 can be used directly with the Trend T9,Felisatti R346EC.

PFJ/SET/3 can be used directly with the EluMOF131, 177 and 177(E), DeWalt DW624, 625EK,629 and Mafell L065E.

The Bosch GOF 1300ACE can also be fitted but willnot allow fitment of the fine adjuster.

When using the larger routers, the longer 500mmguide rod bars of 10mm diameter Ref. ROD/10X500should be used. Care must be taken when using theheavier routers to reduce bar flex.

Do not mount any power tool

not specified in the lists above.

Pivot Frame Jig - PFJ/SET/1

Using Min. Max.Accessory cutting dia. cutting dia.

Ref. ROD/8X500

Mini Pivot 10mm 320mmBeam Trammel 170mm 1050mm

Pivot Frame Jigs - PFJ/SET/2 & PFJ/SET/3

Using Min. Max.Accessory cutting dia. cutting dia.

Ref. ROD/10X500

Mini Pivot 10mm 320mmBeam Trammel 186mm 1050mm

PIVOT FRAME JIG

PIVOT JIG MODES

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Mini-Pivot Mode Guided Ski Mode

Freehand Ski Mode

Beam Trammel Mode

The jig will not be complete

in its mini-pivot mode

without a machined disc of

min. thickness 15mm. In

view of the wide variety of

operations which may be

performed, it is not practical

to supply discs with the kit.

It is very simple for the user

to make discs as required,

using the jig itself.workpiece

template

MDF disc

battenworkpiece

batten

PIVOT FRAME JIG

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DESCRIPTION OF PARTS

Using the drawing below as a guide to assemble the jig.

1 Pivot bar

2 Nylon shoe

3 Threaded shoe stud

4 Shoe locking knob

5 Spacer

6 Rod locking knob

7 Nut

8 Long adjuster stud

9 Short adjuster stud

10 Knurled adjuster

11 Trammel pivot knob

12 Trammel pivot stud

13 Accessory Rods - suggested accessory Refs. ROD/8X500 or ROD/10X500

PIVOT FRAME JIG

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ASSEMBLY

Mini-Pivot & Ski Frame

■ Screw the four studs into the larger-diameterend of the four shoes. The stud should bescrewed almost to the bottom of the shoe, butmust not be allowed to protrude beyond theend. The fit of the stud in the shoe may betight. In this case, the stud may be held insoft vice jaws. Repeat the operation for theremaining three studs and shoes.

■ Fit the shoe/stud assembly to the outer-mostholes in the pivot bars, using three shoespacers per assembly. The spacers areintended to offer a choice of �ride-height� ofthe router above the workpiece. Finally,screw the shoe locking knob hand tight on tothe spacer.

■ Screw the four guide rod locking knobs lightlyinto the tapped holes immediately above thefence rod holes, from the same side as theknobs which lock the shoe assemblies. Slidethe fence rods into the router and temporarilylock in position with the locking knobs whichform part of the router.

■ Slide a completed pivot bar assembly on toeach end of the fence rods, and temporarilylock in position by means of the guide rodlocking knobs.

■ The next step is to allow fitment of the fineadjuster. The M6 stud is threaded onto thetapped hole and an M6 locking nut istightened against router base. If your routerdoes not have a tapped hole in the edge ofthe base similar to the Trend T5 then therouter base must be drilled out and a threadtapped. The following routers will needmodification:

Black & Decker BD780, 780E, KW779,KW780(E), 800(E), 850ETBosch GOF 900A, 900ACE,Elu MOF69 and Makita 3620

The edge of the router base must be drilled inthe correct central position to align with thehole in the pivot bar when fitted on to theguide rails. The pivot bar can be used as adrilling jig. The hole diameter must be 5.0mmand 6.0mm deep. An M6 x 1.0mm pitch tapmust then be used to thread the hole.

■ For the Hitachi M8, M8V the base of therouter has a recess which will accept a M6nut so giving the same facility as a threadedhole.

In the freehand ski-frame mode, it

may be found preferable on occasion

to work with the shoes reversed on

the studs, ie. with the large flanges

in contact with the worktop. This is

best effected by removing the shoes,

reversing and re-fitting them to the

same end of the studs. Do not wind

the shoes along the full length of the

studs, as unnecessary wear of the

nylon screw-threads will occur.

ADJUSTER STUD

SHORT OR LONGM6 NUTS

ADJUSTER KNOBKNURLED

POSITION 1

POSITION 2SLIDE TO

PAIRS OF M6 NUTS

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PIVOT FRAME JIG

Beam Trammel Mode

Remove the entire adjuster assembly and itsassociated pivot bar assembly, leaving theremaining pivot bar assembly in position.

The trammel pivot stud has a point ground atone end. This point may be used as a fulcrumon soft timbers or where a high degree ofprecision is not required. However, the usershould be aware that it is possible for the pointto leave its indentation during machining, withadverse effect upon the workpiece. Whereverpossible, the stud should be used in conjunctionwith a bored hole, thereby ensuring precisionand workpiece safety and also allowing bothhands free to control the router if necessary. Insuch cases, the pointed end of the stud isscrewed into the pivot knob, to avoid accidentalcontact by the user. Run two plain nuts looselyon to the stud, almost to the knob and use oneto lock the knob in position. Screw the assemblyvertically into the central tapped hole in theremaining pivot bar, with the knob on the sameside as the shoe and fence rod locking knobs.Keep screwing until the stud protrudes below thebar by approximately 12mm and use a spannerto lock the stud to the bar with the remaining nut.Remove both shoe assemblies from the pivotbar.

The jig is now in its most elementary beamtrammel mode. This set-up will provide themaximum machining radius for any given fencerod length, since both the router and the singlepivot bar may be positioned at the extreme endsof the rods. This arrangement requires therouter to ride with its base plate in contact withthe top face of the workpiece.

BLOCKSPACER

WORKPIECE

WORKTOP AND WASHERLOCKNUTS

BARPIVOT

WORKPIECE

ASSEMBLYPIVOT STUDPIVOT BAR

In many cases it will be useful

to lock the stud in position with

a washer and pair of locknuts

beneath the worktop.

Ensure electric cord of router

does not foul the rods of the jig.

PIVOT FRAME JIG

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OPERATION

Mini-Pivot Trammel mode

This is the basic operating mode of the device,enabling the user to execute a number ofcontrolled small diameter trammel applicationswhich would otherwise be extremely difficult. Itis important that the user fully understands theoperating principle of the device beforeproceeding further:

The normal mode of operation of a router inbeam trammel mode. In this configuration, thepivot point is placed outside the area covered bythe base of the router, enabling circles or partsof circles to be cut by swinging the router on thepivot. This method cannot be used however forthe cutting of circles of small diameter, since thiswould require the pivot point to be placed withinthe area covered by the router baseplate.

The Mini-Pivot configuration creating an artificialor �imaginary� pivot. This is done by mountingthe router over a circular disc �work-surface� onfour nylon guide shoes which engage its rim.For convenience this item will be referred to asthe 'primary disc'. The guide shoes are held inposition by a pair of pivot bars, which arethemselves attached to the router fence rodsenabling the entire assembly, including therouter, to be rotated on the disc.

The arrangement is shown in outline plan-view.It can be seen from this drawing that the positionof the router on the rods can be adjusted so thatthe cutter follows a pre-determined circular pathabout an imaginary pivot at the centre of thedisc.

PATHCUTTER

PIVOTTRAMMEL

SHOE PATH CUTTER PATH

PIVOTIMAGINARY

In its simplest arrangement, the workpiece maybe directly mounted on the disc but it will beseen that the system is highly versatile andmany other mounting arrangements arepossible. For the moment it is perhapssufficient to note that, for example, a rough-sawnworkpiece may be fixed to the disc by anyconvenient means, and machined internally orexternally to a high order of accuracy. Theminimum machined diameter is limited only bythe strength and general behaviour of theworkpiece. The maximum available diameter islimited only by the length of the guide rods, sincethe disc may be made any required size.

Select an adjuster stud, long or short aspreferred. Pass the stud through the centralhorizontal hole in one of the pivot bars and fittwo M6 Nuts loosely on the stud, inside the pivotbar. Screw the stud into the tapped hole on theend flange of the router base as far as it will go.Use the spanner to lock the stud in position withthe innermost nut. Screw the knurled adjusterknob on to the free end of the stud, until it bearslightly against the pivot bar. The knurled knobmay now be used for fine adjustment of therouter on the fence rods and may be locked inany desired position by means of the free plainnut inside the pivot bar. Use of the hexagon nutin conjunction with the knurled knob will clearlylock the position of the router on the guide rodsby itself. The knobs on the router should alwaysbe used for added security. It is oftenconvenient to add pairs of locknuts on both sidesof the pivot bar. This enables the router positionon the guide rods to be pre-set in two positions,for repeat work.

PIVOT FRAME JIG

Producing a Circular Disc Work

Surface

The first application for mini-pivot work isnecessarily the construction of a primary disc ofsuitable size. For this purpose, the jig will berequired in its beam trammel mode. Initiallyhowever, the router alone is used in conjunctionwith a simple jig. This is simply a scrap panelwith a rectangular cutaway at one corner, usedto locate the position of the router.

Where it is desired to maximise the workingrange in mini-pivot mode, the diameter of theprimary disc is made equal to the guide rodlength.

MDF is an excellent material for the disc, since itis flat, smooth, of constant thickness anddimensionally stable. The minimum thicknesswhich may be used is 15mm.

A piece of MDF which will accommodate therequired diameter is selected, and the centrefound and carefully marked. A hole 6 mmdiameter is now drilled, to accommodate thepivot assembly. It may be noted at this pointthat the inherent accuracy of the jig is of a veryhigh order. In the mini-pivot mode, this accuracyis however, critically dependent upon that of thedisc. It is therefore extremely important that thedisc is machined as accurately as possible. Itmay well be that the throat capacity of anyavailable drill-press is insufficient to enable thedrilling of the centre hole to be carried out by thismeans.

Freehand operation is not advised, since it isimportant that the hole is drilled precisely at rightangles to the face of the stock materialmoreover, it is also possible to drill oversize

when working freehand. Given however, that thestock material is squared-off to begin with, it is asimple matter to use the router as a drill press.The router is placed in the desired position onthe workpiece, possibly with the aid of a scribingpoint held in the collet. The jig is then broughtup to the router and cramped in position. Therouter is then fitted with the required cutter andthe hole bored. Note that sideways pressure onthe router is required to keep it in position duringmachining.

It is equally important, for maximum accuracy,that the pivot stud fits the hole fairly tightly. Anyplay arising from a slightly oversize hole mayhowever, be removed by wrapping thin plasticadhesive tape around the end of the bolt untilthe fit is satisfactory.

The jig may now be used in the simple beamtrammel mode to profile the workpiece to thediameter required. If desired, the adjuster maybe used on the free end, but is not strictlynecessary. The disc may be machined directlyfrom rectangular stock, in which case, a small-diameter 6.35mm (1/4�) straight cutter should beused (eg. Trend Ref. C008 or 3/22X1/4TCT), toreduce loading and minimise dust. A bettermethod is to profile the disc slightly oversize witha scroll saw or similar device and use the routeronly to generate the final profile. In this case,finish will be improved with a larger diametercutter.

Cutting should be carried out in a series ofpasses, gradually increasing the depth of cut. Itis important that the disc blank is fixed firmly to aflat worktop before routing the profile. This canbe done with two woodscrews on a diameter ofthe disc, at some personal �standard� radius.

WORKPIECEPRESSURE ON ROUTER

SIDEWAYS

WORKPIECECRAMPED TOSCRAP PANEL

321

TAPE

90¡

-11-

It is suggested that a few experimental cuts aretaken, with a small cutter (of more or less anytype, as long as it has a bottom-cut facility), onscrap timber. This may be attached to asacrificial piece of hardboard, which is thenattached to the primary disc, with fillets of hot-melt glue. The purpose of the hardboard is toavoid possible damage to the surface of the discby over-depth cutting. A very good exercise inthis respect is to machine a full circular hole ofabout 50mm diameter in one workpiece and thenmachine another into a disc which fits it exactly.

Note that for operations of this kind, the mini-pivot assembly may be removed from the discfor the purpose of a trial fit, then replaced forfurther machining, with no loss of accuracy. Theworkpiece must of course, be left in its originalposition on the disc.

If some means of accurate measurement of discdiameter (eg. vernier caliper) is available, trialfits are unnecessary, since the adjuster knob andlocking nut can be used in conjunction withfeeler gauges (available from most auto partssuppliers) to adjust the router position directly.

PIVOT FRAME JIG

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Setting-up the Mini-Pivot

Configuration

At this stage, the disc may be left attached to theworktop for the moment in order to assembleand get the general feel of the mini-pivotconfiguration. For this purpose, the jig should bere-assembled in accordance with the assemblyinstructions, but (temporarily) without the lateraladjuster stud and knob. This is because thestud does impart a slight frictional resistance tothe movement of the pivot bars on the rod and itis important, at least to begin with, that the usergets the feel of the shoes against the disc.

The jig is placed over the disc such that theflanges of the shoes rest on the top of the discand the smaller diameter of the shoes bearsagainst the edge of the disc. In this position, thebars are locked on to the rods. It should bepossible to rotate the jig on the disc freely,without any undue play in the system. Someslight resistance to motion will be felt; this isnormal. The shoes must always be tight on thepivot bars; they are not meant to rotate on theirthreaded studs.

Of particular interest is the ability to cut acomplete circle without changing operatorposition, i.e. there is no need to walk round thework. This feature should be practicedsomewhat, since it is necessary to get used tothe idea of controlling the plunge locking knob atthe same time.

Please note that the router cable can

get in the way of the shoes, unless it

is held by an overhead mount.

If this standard is adhered to for all primary discsmade, it becomes a simple matter to fix any discto a worktop with matching holes. After initialmaking of the disc, an excellent method ofsubsequent fixing is to bore out and counterborethe holes, to accept flat-topped bolts, which mayalso be passed through the worktop. Accuraterouter boring and counterboring may beimplemented with the jig.

WORKTOP

DETAIL

DISC

DISC

BATTEN

Simple Ski-Mode

In its standard mini-pivot assembly configuration,the jig may be used without the guide disc in acompletely freehand mode on a flat worktop. Inthis way, it may be used to plane the surface ofa small piece of material of irregular thicknessand finish, then reverse it and machine it downto a pre-determined thickness.

It may also be used in conjunction with atemplate and guide bush or ball bearing guidefor profiling. For any of these operations, the jigoperates the router in a completely stable anti-tipping configuration.

Moreover, the router ride-height may be adjustedto suit the workpiece, by means of the spacers.The size of work which may be handled islimited only by the length of the fence rods andcan be maximised by moving the router to oneend of the rods. Since the ride-height is fixed,the router plunge facility can be used forfreehand lettering etc. even in uneven

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PIVOT FRAME JIG

WORKPIECE

CUTOUTSMACHINED

DISCANNULAR

FILLETSGLUE

In some applications, it is inconvenient to mountthe disc to a flat worktop. Instead, the disc maybe screwed to a substantial batten, which maythen be held in a vice, or the jaws of aWorkmate®. It will also be found helpful to cutaway a fairly substantial slot in the centre of thebatten, to give clearance for bolts which arefitted to the disc in certain advancedapplications.

With large discs, it may sometimes be necessaryto place additional temporary support blocksbeneath the disc, to avoid undue strain on thebatten.

Annular Disc Work

Where the thickness of the workpiece is beyondthe capacity of the shoe spacers, an annulardisc may be used. Discs of this type are easilymachined with the jig, the inner cut-out beingtaken in either beam trammel or mini-pivotmode, dependent upon dimensions. Both thedisc and the workpiece are mounted on a flatworktop. The arrangement allows the discthickness to be added to available ride-height.

A very powerful additional facility with discs ofthis type is the machining of circular holes orslots etc., in very large workpieces, such askitchen worktops requiring cutouts for essentiallycircular plumbing or other fixtures. This iseffected by mounting the disc on the workpiecein the desired position, with screws if possible,but otherwise by adhesive means and using thepivot frame to cut such holes or shapes as arerequired.

A simple way of locating the disc is to draw apencil circle on the workpiece with a compass, ofa slightly smaller diameter than the internaldiameter of the disc and use this for visuallocation. Clearly, if the workpiece is actuallyfixed in its final position, for example, against awall, the arrangement is necessarily limited tooperations which are not too close to the wall.

On the other hand, if the workpiece can beremoved from its location and treated as a�bench job�, the system is immediately muchmore flexible. Where the workpiece completely

supports the disc, any convenient disc size maybe used. It is quite feasible to allow the disc tooverhang the workpiece slightly when workingnear an edge or a corner however. But in thiscase, for safety reasons, the disc should be assmall as the required work will allow and boththe workpiece and the disc must be very well-supported.

PIVOT FRAME JIG

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workpieces (eg. rustic nameplates). A particular advantage of the �open� constructionof the pivot frame, is the ability to see theworkpiece clearly, with the router assembly ridingwell above the workpiece. This can be ofparticular advantage for work against a template,where the cut needs to be �stopped� by visualinspection.

Guided Planing Mode

This machining mode is essentially an extensionof the foregoing arrangement and permitsplaning of long work, together with a facility formachining parallel grooves or edge-mouldings.

It requires a flat work surface and two straight-edged battens of constant thickness, which maybe fixed to a flat work surface (cramping is quitesuitable), such that the straight edges areseparated by a fixed distance and are parallel.

The jig is adjusted so that the flanges of thenylon shoes ride on the battens and the smallerdiameter of the shoes bears against the edgesof the battens. Ride-height is determined initiallyby the depth of the battens, but may be modifiedby suitable arrangement of the shoe spacers.

The workpiece may be attached to the worktopby fillets of hot-melt glue. Where the workpieceis uneven on both surfaces (e.g. it may betwisted), it may be packed with small pieces ofveneer at the high spots, until it cannot berocked on the worktop; the glue fillets may thenbe applied.

It is recommended that the largest diameterbottom-cut router cutter available is used for thisoperation. The use of routers limited to 1/4"diameter shanks will reduce the possibilities but,for example, a 25.4mm (1") diameter cut will beobtained from straight two-flute cutter Trend Ref.4/08X1/4TC and a 30mm cut from scribing ovolocutter Trend Ref. 6/5X1/4TC, both available with1/4" shank.

To begin, the jig should be moved over the workwith the cutter stationary, in order to find thehighest point; depth of cut may then be set withreference to this point. It is recommended thatseveral passes are made over the work with avery small depth of cut (no greater than 0.5mm),gradually clearing the high-spots and eventuallyarriving at a flat smooth surface.

The router may be left to slide freely on its rodsand guided by means of its plunge knobs for thisoperation, since it will stay in place at any setposition, provided the cut is light. If the cut is toodeep, the router may take control and pull itselfacross the work off-line.

For the final cut in particular, which should be nogreater than 0.2mm, the router should be lockedon the rods for each pass, and moved acrossthe work by means of the locking knobs on apivot bar and not by the handles on the routeritself. This will eliminate any tendency for over-depth cutting due to hand-pressure �springing�the guide rods.

Another possibility with the system is that ofmachining straight parallel grooves, eithercontinuous or stopped, with any of a number ofstraight or profiling cutters.

It is not wise to rely on accurate tracking of thesystem along both parallel battens for work ofthis nature, where positional accuracy of therouter is of importance. The work is bettercarried out by preferential pressure on onebatten only.

Moreover, it is perfectly possible for even a stoutbatten to spring slightly in the centre underpressure, if it is cramped at the ends only. Anadditional cramp or two towards the centre will

CUTTERFLAT-BOTTOMED

STOCKWARPED

PACKINGVENEER

FILLETGLUE

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PIVOT FRAME JIG

Mounting the Workpiece

Wherever possible, the safety of the workpieceshould be ensured by fixing to the disc orworktop by the most positive means allowable.Double-sided tape Trend Ref. DS/TAPE, may beused for many applications, particularly wherethe surfaces to be joined are flat, smooth andnot porous or dusty.

STUDDING

DISCSECONDARYPRIMARY OR

WORKPIECE

DISCALLOY

WORKPIECEBLANK

PROFILEPROPOSED

BLANKWORKPIECE

WORKTOP

GLUE FILM

SHIM

Fillets of hot-melt glue, applied with a gun atconvenient places, can be very effective.

Where the central portion of a given workpiece isthat which is finally required (ie. the scrapmaterial occurs at the edges), the system can bevery useful. The system is best used with �glue-film�, which is essentially hot-melt glue in sheetform.

considerably reduce the problem.

Where work of the highest accuracy is required,the clamp guide is strongly recommended. Thisis available in three lengths (Trend Refs. CG/24,CG/36 and CG/50) and furnishes a straight edgewhich is both straight and parallel to very closetolerances. It is used in conjunction with anextra pivot bar and shoe assembly.

Wherever possible, regardless of operatingmode of the jig, it is advisable to set the depth ofthe final cut off the workpiece and operate the jigfrom the pivot bars rather than the plunge knobs,to avoid over-depth cutting due to flexing of therods under hand pressure.

In many cases, this will not be possible andthere is consequently some risk of indentation ofthe workpiece as the initial plunge is taken(particularly with profiling cutters). It is possibleto alleviate the problem with an extraattachment, easily home-made. This comprisesa small block of wood, of appropriate thickness,clamped to the guide rods with a singlewoodscrew, as close to the router as operationwill allow.

BLOCKSPACER

BLOCKCLAMPING

PIVOT FRAME JIG

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ADVANCED APPLICATION

Mini Pivot Mode - Off-Centre Work

For decorative applications, the scope of thePivot Frame Jig may be considerably extended.By mounting the workpiece in various positionson the main disc and using the mini-pivot facilityto cut circles or parts of circles many designscan be achieved.

A highly-versatile arrangement may be createdby machining a 6mm slot in the disc (referred tofrom now on as the �primary disc�). The slot isused to mount a �secondary disc�, preferably inbirch plywood, of about half the diameter of theprimary disc and about 9mm thick on to thelatter, via a central 6mm bolt, nut and washer.Thus, the secondary disc may be rotated on theprimary disc to any desired angular positionrelative to the mini-pivot centre and may also beoffset from this centre by any desired amount.The secondary disc may be marked out with theaid of rule and compasses into any number ofequal angular divisions, 24 being fairly versatilesince it allows the disc to be divided into 2, 3, 4,6, 8, 12 or 24 equal sectors.

From these divisions, the disc may be drilled onits edge with a series of holes of equal depth (itis very easy to set up the router to do work ofthis kind). The holes may be used in conjunctionwith a simple stop block and metal rod. Exactlythe same idea may be applied to beam trammelwork. In this case, the trammel pivot is mountedon a flat worktop and the secondary disc run in aslot on the same worktop, a suitable distanceaway from the trammel pivot. The workpiece ismounted on the secondary disc by any preferredmeans.

It is a simple matter to cut tubes (or parts oftubes), of a depth limited only by the reach ofthe cutter, for inlay purposes. For example,imagine that a tube of contrasting timber isrequired to be glued precisely into an aperturewhich has been machined by a 3.2mm (1/8")diameter cutter eg. Trend Ref. C001 or3/10X1/4TCT. This can be done by fixing asuitable offcut of timber to the centre of the MDFdisc and setting the Mini-Pivot system to twopositions in succession, to machine the outerand inner diameters in turn.

Note that, if the same 3.2mm (1/8") dia. cutter isused, the router will need to be moved along therods by 6.35mm (1/4") or in fact just slightly less,to allow a little gluing clearance.

The work discussed thus far in this section isobviously limited by the size of the primary disc,since the top flanges of the mini-pivot shoesmust be allowed sufficient clearance to do theirjob. It may seem at first sight that thisrepresents a limitation of the system, but in factit doesn�t.

EXAMPLES

SECONDARYDISC

6mm.SLOT

STOPBLOCK

WORKPIECE

PRIMARYDISC

INDEXINGHOLES

INDEXING BLOCK

SLOTTED WORKTOP

TRAMMELPIVOT

CUTTERPATH

WORKPIECE SECONDARYDISC

PIVOT FRAME JIG

-17-PIVOT

WORKPIECE

SUPPORTWORKPIECE

WORKPIECEDISCANNULAR

SUPPORT BATTEN

This arrangement is but a variation of the�secondary disc� system discussed earlier. Notehowever, that the annular primary disc may berequired to overhang its support batten by aconsiderable amount and may thus require extrasupport. This can often be provided by theworkpiece itself.

Both arrangements require that the workpiece iscramped firmly to the worktop during machining.In a lateral sense, the cramping can be more orless anywhere convenient.

The Pivot Frame Jig may be used in its linearand mini-pivot modes to generate decorativepanel mouldings (of particular interest tofurniture restorers). Linear lengths of mouldingare easily produced as �cut-offs� from a singlesheet of stock. Generally, a small-radius ovolocutter (typically Trend Ref. 7/01) will be required.Radiused parts may also be machined from asingle piece of timber, but require the workpieceto be moved between individual operations. Themethod illustrated will also ensure that the grainof the timber can be arranged to providemaximum strength.

Only a simple user-modification is required toenable the jig to cut radial patterns. The primarydisc is furnished with a number of holes (24 willbe found useful) equally spaced around theperiphery, such that they fall under the centralhole in either of the pivot bars. A peg may nowbe passed through the hole in the pivot bar suchthat it engages with any of the holes in the disc,thus temporarily locking the router in position.

It was pointed out in the applications section thatthe primary disc, in the form of an annular ring,could be mounted over a large workpiece for thepurpose of machining cutouts in the latter. Inthis case, the annular disc is mounted over apair of parallel battens, such that a workpiece, inthe form of a long strip of timber, may be slidbetween them and cramped in a series ofpredetermined positions.

In this way, the workpiece does not impede thepath of the nylon shoes (since they ride aboveit), thus enabling repeated decorative patterns tobe cut. The principle is easily extended to dealwith essentially circular workpieces (eg. mirror-frames, with the addition of a further pivoteddisc, to provide accurate positioning of theworkpiece).

TRIM

POINTSEPARATION

GRAIN

WORKPIECEMOVE

SAND AWAY

STOCK

DISC

CRAMPINGSTRIP

BATTEN

WORKPIECE

SPACER

FLAT WORKTOP

PIVOT FRAME JIG

-18-

CUTTER

CUTTER PATH

WOOD SPACER

BRACKETANGLE

WORKPIECE

SECONDARY DISC

ACCESSORIES

�Decorative Routing Jigs and Techniques� Book -Ref. DRJT/BOOK.Pack of 8 spacers, 3mm thick - Ref. PJ/1Long rods 8mm x 500mm - Ref. ROD/8x500Long rods 10mm x 500mm - Ref. ROD/10x500

MAINTENANCE

The jig has been designed to operate over alond period of time with a minimum ofmaintenance. Continual satisfactory operationdepends upon proper tool care and regularcleaning.

Cleaning

■ Regularly clean the bars with a soft cloth.Keep rods and studs free of resin build up.

Lubrication

■ Your jig requires no additional lubrication.

RECYCLING

The jig, accessories and packaging should be

sorted for environmentally friendly recycling.

GUARANTEE

The jig carries a manufacturers guarantee inaccordance with the conditions on the enclosedguarantee registration card.

WORKPIECE

ROUTER MOVEMENT PEGINDEXING

RADIAL PATTERN

INDEXING HOLES

Radial slots may now be machined in theworkpiece, their length being determined bypairs of locknuts on the adjuster. The adjustermust be fitted to the pivot bar not occupied bythe peg. The fit of the peg must be such as tominimise movement of the pivot frame on theprimary disc.

PIVOT FRAME JIG

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PFJ - SPARE PARTS LIST v2.0 08/2002

No. Qty. Desc. Ref.1 2 PFJ/SET/1 Main Bar for Trend T5 WP-PJ/012 2 PFJ/SET/3 Main Bar for Elu MOF177 WP-PJ/023 4 Delrin® Shoe M8 WP-PJ/034 1 Short Stud M6 x 180mm WP-PJ/045 1 Long Stud M6 x 180mm WP-PJ/056 1 Knurled Nut M6 WP-PJ/067 4 Stud M8 x 75mm WP-PJ/078 1 Trammel Stud M6 x 50mm WP-PJ/089 2 PFJ/SET/2 Main Bar for Trend T9 WP-PJ/0910 16 Spacer 8mm OD x 6mm thick WP-RR/5011 4 Locking Knob M6 x 10mm WP-KNOB/0112 1 Lobe Knob M8 WP-KNOB/0613 1 Knob M6 WP-KNOB/0814 8 Nut Hex M6 WP-NUT/0615 1 Manual MANU/PFJ

PIVOT FRAME JIG

-20-

�PIVOT

FRAME

JIG15

MA

NU

/PF

J v2

.0

© Copyright Trend 2002. No part of this publication may be reproduced, stored or transmitted in any form without prior permission.Our policy of continuous improvement means that specifications may change without notice. Trend Machinery and Cutting Tools

cannot be held liable for any material rendered unusable or any form of consequential loss. E&OE® All trademarks acknowledged.

Trend Machinery & Cutting Tools Ltd.Odhams Trading Estate St Albans RdWatford WD24 7TR EnglandEnquiries: __________________0800 487363Technical Support:____0044 (0) 1923 224681Fax: ________________0044 (0) 1923 236879Email:____________mailserver@trendm.co.ukWWW: __________www.trendmachinery.co.ukRECYCLABLE