Problem- Jaw Macro

[DIFF OVER]

Here is a two axis Okuma jaw boring macro with graphics.


( OKUMA 2 AXIS LATHE JAW BORING PROGRAM WITH GRAPHICS )

( **** SET TOOL TO FRONT OF JAWS **** )
( **** SET THE FOLLOWING VALUES **** )

V1= ( SPINDLE RPM "SFM" ) 300
V2= ( "X" START POINT ) 2.0
V3= ( T00L NUMBER ) 0303
V4= ( DEPTH OF CUT "DIAM" ) 0.05
V5= ( "Z" DEPTH "-" VALUE ) -1.00
V6= ( ROUGH FEED RATE ) 0.008
V7= ( FINISH FEED RATE ) 0.005
V8= ( FINISH DIAM OF JAWS ) 2.75


( NUMBER IN [ ] IS TOOL NUMBER )
VTLIN[3]=8 VTLFN[3]=1 VTLD[3]=0.625 VTLL[3]=2 VTLA2[3]=0 VTLA1[3]=80

VWKR=393.7007 VCHKL=0 VCHKD=0 VCHKX=4 VCHKZ=-3
DEF WORK
PT LF,LC,[-30 ,0],[40,40],[30,0]
PT LF,RC,[0,0],[18,18],[59,0],0
END
DEF WORKF
PF 0,[0,0],40,D
END
CLEAR
DRAW

(**********************)

G00 X20. Z20.
G50 S2000
G96 S=V1 M41 M03 M08
G00 X=V2 Z0.1 T=V3
G85 NBORE D=V4 F=V6 U0.01 W0.002
NBORE G81
G00 X=V8 Z.1
G01 Z0 G41 F=V7
Z=V5
X=V2
G40 K-.0004
G80
G00 Z.1
X20. Z20. M9
M01

/

(FINISH PASS)
G0 X20. Z20.
T=V3 G96 M3 S=V1
G87 NBORE
G0 Z.1
G0 X20. Z20. M9
M02

[Algirdas]

I don't see a taper in this program. You can't neglect deformation and declining when cutting and when jaws are closed with force. It is approx. 0,1mm in dia for 30mm lenght for Schunk chuck.

[broby]

If you are getting that much deformation with your chuck jaws, I would suggest that you have lots of wear on the jaw slides!
This macro would be very easily modified to allow for said taper... just add a movement on the line that cuts to the required depth.

[littlerob]

Originally Posted by DIFF OVER Here is a two axis Okuma jaw boring macro with graphics. ( OKUMA 2 AXIS LATHE JAW BORING PROGRAM WITH GRAPHICS ) ( **** SET TOOL TO FRONT OF JAWS **** ) ( **** SET THE FOLLOWING VALUES **** ) V1= ( SPINDLE RPM "SFM" ) 300 V2= ( "X" START POINT ) 2.0 V3= ( T00L NUMBER ) 0303 V4= ( DEPTH OF CUT "DIAM" ) 0.05 V5= ( "Z" DEPTH "-" VALUE ) -1.00 V6= ( ROUGH FEED RATE ) 0.008 V7= ( FINISH FEED RATE ) 0.005 V8= ( FINISH DIAM OF JAWS ) 2.75 ( NUMBER IN [ ] IS TOOL NUMBER ) VTLIN[3]=8 VTLFN[3]=1 VTLD[3]=0.625 VTLL[3]=2 VTLA2[3]=0 VTLA1[3]=80 VWKR=393.7007 VCHKL=0 VCHKD=0 VCHKX=4 VCHKZ=-3 DEF WORK PT LF,LC,[-30 ,0],[40,40],[30,0] PT LF,RC,[0,0],[18,18],[59,0],0 END DEF WORKF PF 0,[0,0],40,D END CLEAR DRAW (**********************) G00 X20. Z20. G50 S2000 G96 S=V1 M41 M03 M08 G00 X=V2 Z0.1 T=V3 G85 NBORE D=V4 F=V6 U0.01 W0.002 NBORE G81 G00 X=V8 Z.1 G01 Z0 G41 F=V7 Z=V5....X=V8+.005- or what ever X=V2 G40 K-.0004 G80 G00 Z.1 X20. Z20. M9 M01 / (FINISH PASS) G0 X20. Z20. T=V3 G96 M3 S=V1 G87 NBORE G0 Z.1 G0 X20. Z20. M9 M02

That is how I run mine