unit 7 - cnc - lecture 2

8/16/2019 Unit 7 - Cnc - Lecture 2

1/13

Co –Ordinate Systems in CNCMachines

Cartesian System

X, Y, Z are at 90˚ to each other

Use Right-hand R!e to designate the "rimary a#is o$the machine too!

%ach &nger "oints to '(edirection o$ motion o$ the CNCtoo! motion o$ the CNC too!


2/13

Co –Ordinate Systems in CNCMachines)-*#is CNC Mi!!ing Machine

+he !ongest tra(e! s!idere"resents the X-a#is

+he 'Z-a#is "ointsinto the s"ind!e


3/13

Co –Ordinate Systems in CNCMachines)-*#is CNC Mi!!ing Machine

+he !ongest tra(e! s!idere"resents the X-a#is

+he 'Z-a#is "ointsinto the s"ind!e


4/13

athe *#es esignation

+Z

+Z

+X or

+Y? +X or+Y?


5/13

Rotationa! *#es

*,.,C or /,,1 a#es


6/13


7/13

CNC Machining Centers7ertica!, hori8onta!, or ni(ersa! – e"ending on the orientation o$ the

s"ind!e7ertica! machining centre S"ind!e on a (ertica! a#is re!ati(e tothe 5or: ta;!e6

Typically used for atwork that requires toolaccess from top


8/13

CNC Machining Centers7ertica! machining centre


9/13


10/13

CNC Machining Centers7ertica! machining centre S"ind!e on a "ara!!e! a#is re!ati(e to

the 5or: ta;!e6

More Rigid than 7MC ;ecase o$constrctiona! $eatres

=igher MRR

Rotary ta;!e is sa!!y "ro(ided >*#is .?


11/13

CNC Machining CentersUni(ersa! machining centre S"ind!e can trn@s5i(e! in m!ti"!e

directions6

=igh!y "re$erred in *eros"ace and *tomo;i!e

indstries


12/13

CNC Machining Centers

A *#isA6B *#is

) *#is

*#is

B *#is

D *#is

S"ind!e rotation is considered as an a#is in

*eros"ace ande$encea""!ications


13/13

Eor:ing 2!ane

*cce!eration@ece!eration

Radis Com"ensation

.U

Canned Cyc!e

.asic CNC +ermino!ogy

*tomatic 2a!!et Changer

unit 7 - cnc - lecture 2

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