Stelron PLC Chassis

PLC Series Assembly Chassis

The STELRON Precision Link Chassis (P-Link) provides increased performance and exceptional accuracy in an indexing chain type assembly chassis. The prime mover in this indexing system is the time proven STELRON RD Series Index Drive. This heavy-duty cam driven index drive provides optimum dynamics by providing a modified sine motion through a set of hardened and CNC ground drive sprockets. The indexer also provides overload protection in the event of a jam. This overload protection is integral to the RD unit and can be adjusted to match the dynamic loading of each particular application.

The chassis is available in “Carousel”, “Over/Under” and "Module only" configurations. All types are provided in precision jig plate aluminum construction. This is similar to the STELRON RWB chassis construction. The entire chassis is basically one piece and consists of precision machined bottom, middle and top plates that allow convenient mounting surfaces for both synchronized and non-synchronized components at each station.

The bottom and middle plates can be up to 54 inches wide to accommodate the mounting and/or anchoring of outboard stations such as feeders, presses, and pick and place devices such as the STELRON Transpart. These devices can be powered up from the lower central drive shaft. The top plate is removable for customer machining and mounting of inboard devices such as the STELRON Vari-Pak. These inboard devices can be powered from the upper central drive shaft. The upright frames that support the conveyor links also provide another mounting surface for fixed platforms or tooling. In contrast to other indexing chain systems that are mounted on stands and/or weldments, this precision chassis frame provides for an unprecedented ease of integration.

Stelron PLC Introduction

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An optional Shot Pin locking device is available for the 6.000-inch and 9.000-inch link “Carousel” versions. When the optional Shot Pin locking device is provided, the index cam has relief ground into the dwell profile to allow for ±.003 accuracy at every in-line station. This synchronized LLS-5 Locking Reciprocator provides better “long term” accuracy and will minimize the station drift that is common with other indexing chain systems.

The take-up or idler end of the conveyor incorporates a chordal compensation cam and linear slide assembly. The idler cams are hardened and ground for minimal wear and long service life. The tension is factory set and should not need further adjustment. But, field adjustments can be easily made to keep proper chain tension during high speed indexing.

Each link of the chain is precision CNC machined and selectively matched at assembly. These 6061-T6 aluminum links have one set of fixed cam followers and one adjustable cam follower which ride on hardened and ground plates. These cam followers eliminate excessive play and provide smooth rolling contact. The hardened link pins and needle bearings provide smooth, wear-free pivoting around the sprockets and minimal (.001) clearance in the hardened steel linear guide ways.

The highlight of this link design is the oversized link pins. On the 3.000-inch and 4.500-inch link, these hardened pins are .472” diameter for the full length of the pin. The 6.000-inch and 9.000-inch versions have a pin diameter of .625” for the full length. Competing designs have a smaller dowel pin (approximately half the STELRON main pin size) pressed into each end of the pin. The capacity of this pin to resist bending is governed by the section modulus which is a function of the third power of the diameter. Therefore, if the end of the STELRON pin is twice the diameter of competing link pins, it will have eight times the capacity to resist bending during normal or overloaded conditions

Some of the P-Link features include:

• Robust, one-piece precision machined chassis.• Heavy duty STELRON RD Series Index Drive.• Precision machined aluminum links.• All potential wear components are hardened and ground for long service life.• Standard Line Shafts provide for easy integration of synchronous ancillary equipment.• Removable Top Plate for custom machining and mounting of ancillary equipment.• 3.000-inch, 4.500-inch, 6.000-inch & 9.000-inch Pitch Links. (Other sizes available)• Module-Only and Constant Lead/Servo drive versions are also available• Dual chain systems

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1.250

2“-4” ADJ.

G

F

H

A

B

C D

P LINK PITCH

B

C

A

B

C

A

B

C

A

J

E

D D

D

W LINK WIDTH

PLC Standard Carousel Configuration

Standard Table Sizes

Single Table Configuration Multiple Table Configuration

Standard Table Configurations "B" Dim.LINK 3" 4.5" 6" 9"

1-Table

36" 45"

48" 54" 48" 54"

72" 81" 72" 81"

96" 108" 96" 108"

120" 117" 120" 117"

2-Table

144" 153" 144" 153"

168" 189" 168" 189"

216" 216" 216" 216"

3-Table 240" 243" 240" 243"

The photo below shows a 14 foot long, High Accuracy chassis, p/n PLC-L-36-144-6-40-6-CR where “A” = 168”, “B” = 144” and “C” = 36”. The running speed is 40 CPM and the Link index = 6”. This chassis is designed for Continuous Running and employs (8) Stelron SVIP-2-A Vari-Pak pick and place units with (1) CS-4 and (2) CS-5 Stelron Cam Slides.

Station Repeatibility:PLC-S w/ standard RD-3 = +/- .005”PLC-L w/ RD-3 & locking mechanism = +/- .003”

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How To Order

PLC - - - - - - -24”to

54”

SeeTableAbove

3.0”4.5"6.0"9.0"

upto

100

1.5” to 36”( Must be consistent with Link Size)

CD = Cycle on DemandCR = Continuous Running

"C

" Dim

ensio

n

“B” D

imen

sion

P

-Link

Pitc

h

Cyc

les p

er M

inute

In

dex

Distan

ce

Ope

ratio

n

A

ccur

acy

36S

S = Standard AccuracyL = Locking Mechanism

for High Accuracy (not available on all sizes)

96 6.0 40 6.0 CR

1.250

2“-4” ADJ.

G

F

H

A

B

C D

P LINK PITCH

J

E

W LINK WIDTH

DIMENSIONS3" 4.5" 6" 9"

A O.A.L. (B + 9") standard O.A.L. (B + 9") standard O.A.L. (B + 24") standard O.A.L. (B + 24") standard

B Center to Center (specify) Center to Center (specify) Center to Center (specify) Center to Center (specify)

C 24" (Standard) to 54" 24" (Standard) to 54" 36" (Standard) to 54" 36" (Standard) to 54"

D 12.590" 12.760" 24.307" 24.643 / 35.898"

E 1.25" 1.25" 1.50" 1.50"

F 8.91" 8.91" 13.06" 13.06"

G 18.00" / 27.75" 18.00" / 27.75" 18.00" / 27.75" 18.00" / 27.75"

H 1.00" 1.00" 1.50" 1.50"

J 3.09" 3.09" 5.19" 5.19"

W 3.00" 3.00" 6.00" 6.00"

5

A

C

B

D

A

C

B

D

D

B

C

A

PLC Standard Over/Under Configuration

Standard Table Sizes

Single Table Configuration Multiple Table Configuration

Standard Table Configurations "B" Dim.LINK 3" 4.5" 6" 9"

1-Table

36" 45"

48" 54" 48" 54"

72" 81" 72" 81"

96" 108" 96" 108"

120" 117" 120" 117"

2-Table

144" 153" 144" 153"

168" 189" 168" 189"

216" 216" 216" 216"

3-Table 240" 243" 240" 243"

The photo below shows a Standard Over-Under PLC Chassis with a special module only Over-Under attached to the top plate. Furthermore, this configuration was synchronized with servo drives providing constant speed tracking between both conveyors.

Station Repeatibility:PLC-S w/ standard RD-3 = +/- .005”

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How To Order

PLC - - - - - - -24”to

54”

See TableAbove

3.00"4.50"6.00"9.00"

upto

100

3”to12”( Must be consistent with Link Size)

CD = Cycle on DemandCR = Continuous Running

"C

" Dim

ensio

n

“B” D

imen

sion

P

-Link

Pitc

h

Cyc

les p

er M

inute

In

dex

Distan

ce

Ope

ratio

n

A

ccur

acy

24S

S = Standard Accuracy

72 4.5 20 9.0 CD

A

C

D

B

W LINK WIDTH

E

G

1.250

2“-4” ADJ.

P LINK PITCHF

DIMENSIONS3" 4.5" 6" 9"

A O.A.L. (B + 9") standard O.A.L. (B + 9") standard O.A.L. (B + 24") standard O.A.L. (B + 24") standard

B Center to Center (specify) Center to Center (specify) Center to Center (specify) Center to Center (specify)

C 24" (Standard) to 54" 24" (Standard) to 54" 36" (Standard) to 54" 36" (Standard) to 54"

D Center Line or Specify Center Line or Specify Center Line or Specify Center Line or Specify

E 1.250 1.250 1.500 1.500

F 2.00 2.00 2.87 2.87

G 18.00 / 27.75 18.00 / 27.75 18.00 / 27.75 18.00 / 27.75

W 3.00" 3.00" 6.00" 6.00"

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Stelron components, inc. • 1495 Mac Arthur Boulevard • Mahwah, NJ 07430Tel - 201.529.5450 • Fax - 201.529.5493 • E-mail - customerservice@stelron.com • Web - www.stelron.com

© Stelron Components, Inc. Cat #PLC2009

PLC Standard Chassis WorksheetCustomer: Date:

Project:

Engineer:

2) “B” dimension ________

3) Total number of links= ________

4) Total Weight of FIXTURES (in lbs.) ________

5) Total Weight of PARTS (in lbs.) ________

6) Link Pitch (3.00) (4.50) (6.00) (9.00) ________

7) Index Distance (in inches) ________

8) Cycle Rate (in cycles per minute) ________ or Cycle Time (in seconds per cycle) ________

Description of load including dimensions: (Also use sketch area above)

9) (check one) Continuous run

Cycle On Demand

1) (check one) Carousel Style

Over/Under Style