[Shepard]

I have 1993 3016 88hs. I am trying to cut a pocket with a wall thickness of .162 in Aluminum. Instead I get an upper Y wall thickness around .192. The lower Y wall is correspondingly thinner. A Fadal service tech set up the machine, checked thrust bearing etc. Also the pocket dimensions are perfect and I wouldn't expect them to be if there was a mechanical problem. Me and two others have zeroed and re-zeroed the Y axis offset more times than I can count. I created another cut file with a simpler pocket in hopes I’d find the problem but the wall measurements were the same. Is there any kind of parameter in the control that I need to clear? I’d appreciate any help.

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N100 O1111 ( TESTAGAIN )
N110 ( CREATED ON 02-25-14 AT 6:16 PM )
N120 ( MCX FILE - T )
N130 ( NC FILE - C:\USERS\Z\DESKTOP\FADAL\TESTAGAIN.NC )
N140 ( MATERIAL - ALUMINUM INCH - 2024 )
N150 G20
N160 G0 G17 G40 G80 G90
N170 ( 1/2 FLAT ENDMILL TOOL - 1 DIA. OFF. - 239 LEN. - 239 DIA - .5 )
N180 T1 M6
N190 A-0.
N200 G0 G90 S3000 M3 E1 X.49 Y-.412
N210 H1 Z.25
N220 Z.1
N230 G1 Z-.1 F6.42
N240 X2.7978 F25.
N250 Y-1.087
N260 X.49
N270 Y-.412
N280 Z-.2 F6.42
N290 X2.7978 F25.
N300 Y-1.087
N310 X.49
N320 Y-.412
N330 Z-.3 F6.42
N340 X2.7978 F25.
N350 Y-1.087
N360 X.49
N370 Y-.412
N380 Z-.4 F6.42
N390 X2.7978 F25.
N400 Y-1.087
N410 X.49
N420 Y-.412
N430 Z-.5 F6.42
N440 X2.7978 F25.
N450 Y-1.087
N460 X.49
N470 Y-.412
N480 Z-.51 F6.42
N490 G0 Z.25
N500 M5
N510 G90 H0 Z0.
N520 E0 X0 Y0
N530 M30
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[ddgman2001]

It sounds like the material at the top of the wall is being deflected away from the cut.

[Shepard]

You're right. I'm embarrassed to say after all the effort and hair pulling it turned out to be a problem with the vise.