Hitachi Sieki Hi-Cell 250 mill/turn

[jerryt1]

We have had this machine for 4 years and never tried any milling with it. Now we are trying to figure it out and having trouble with cutter compensation. Round holes are getting oval using cutter comp. Anyone out there familiar with this machine? It has a Siecos 18T control.

[CNCRim]

I used to work with one exact same model but no full C-axis. Anyway my suspect is program could be wrong code or your live tool location maybe in the wrong place.

Post a picture with geometry and attach a program with it see we can help you.......

[jerryt1]

Here is the part. The part is being held in the chuck by the round end.The following code is ramp milling one of the corner thru holes. See the cutter comp codes. The X offset register was used to open the holes. Note the G0 C0 after the tool change. This was added to reorientate the C axis to C0 at every tool change.
(.375 END MILL)
( RAMP OUT 14.5 MM HOLES THRU )
M666
T023800 G17 G140 M5
G98 M43
T993800
G28 U0.
G28 H0.
G0 C0
G50 C0.
T023800 B0
G262 G97 G145 S1750 M13
G00 X3.58 Z.25 M09
C123.358
Z.1
G01 Z.025 F7.
X3.7212 Z.0138 C121.938 F234.99
X3.8095 Z.0069 C121.113 F220.82
G41 X3.8986 Z0. C120.326 F210.77
X3.9149 Z-.0013 C120.838 F371.28
X3.9244 Z-.0025 C121.382 F395.89
X3.9267 Z-.0037 C121.942 F407.04
X3.922 Z-.005 C122.499
X3.9102 Z-.0063 C123.034 F389.1
X3.8918 Z-.0075 C123.529 F360.33
X3.8674 Z-.0088 C123.968 F318.97
X3.8379 Z-.01 C124.334 F265.85

[jerryt1]

photo did not come in but it is in my gallery if you want to see it.

[NL2000]

Make sure you don't have any values in the wear offset page for the tool.

[CNCRim]

it seem you are trying to cut thread with C-axis and 3-axis simutate, I don't think you can comp the reason was G17 G18 G19 machine only allow to comp in 2-axis only.