THREAD MILL HELP

[JASTON]

We got in a new Okuma lathe (osp 200 control) and we trying to thread mill
on the face off center. It appears to run fine until I add cutter comp then I start to get egging in the hole. I'm putting comp in tool nose rad offset. Is this correct? Any sample code would be great. Thanks for any help.

[txcncman]

How much egging? Does it fall within the thread specs? You may have a tuning/backlash issue on the X axis, the C axis, or both. Since the machine is new, you should take this up with Okuma immediately.

[JASTON]

I am sure the egging is out of spec. I didn't personally measure the egg, but I looked in the machine after they cut it and it stands out like a sore thumb. So it is egged quite a bit. I am not the operator, but they say the more comp they put in the more egg you get. Makes me wonder if they putting the comp in the right place, or the code is incorrect for what we are doing.

[txcncman]

Good point. If they are entering comp for X axis, might cause the problem. Make sure they are entering comp for the live tool diameter and not the X axis for turning.