Rounding Error in Lathe

[Dave Loveridge]

When I backplot a program the coordinates show good, but when I post it out I get lots of rounding errors.

 

ie,

(TOOL - 1 OFFSET - 1)

(OD FR 80 DEG MAIN SPINDLE INSERT - CNMG-432)

N25G0T0101

N30G96S1200M03

N35G0G54X2.45Z.003M8

N40G99G1X-.0625F.015

N45G0Z.053

N50X2.25

N55Z.0262

N310G71U.13R.02

N315G71P320Q360U.02W.003F.015

N320G0X.7195S1200

N325G1X.8402Z-.0342

N330G3X.8586Z-.0563R.0313<----------.0001 off

N335G1X.8585Z-.4163

N340G2X.866Z-.42R.0037

N345G1X2.1125

N350G3X2.175Z-.4513R.0313

N355G1Z-.643

N360X2.25

N415G0Z.03

N420X-.064

N425G1Z0.F.0038

N430X.7419

N435G3X.7932Z-.0106R.0363F.0014

N440G1X.8373Z-.0327F.0038

N445G3X.8586Z-.0583R.0362F.0014<------.0001 off

N450G1X.8585Z-.4163F.0038

N455G2X.866Z-.42R.0037F.0117

N460G1X2.1025F.0038

N465G3X2.175Z-.4563R.0363F.0014

N470G1Z-.643F.0038

N475X2.2174Z-.6218

N480G0X2.2822

 

I have tried changing my system tolerance and so forth but does not make a difference.

 

Thanks for any help

Dave

[Allan Brown]

if using Mp.dll V9.19 try disabling the internal rounding with this addition:

 

mtol : .000001

[randy]

when using a cycle macksure you turn tool nose comp in computer and it should work for you

[Dave Loveridge]

Dave,

Thankyou, the mtol took care of the problem. Thanks for the replies.

 

Dave