[j44snk]

Quick question about Partial cutter comp (when the program is already 'offset' for the tool, which allows you to keep your cutter comp offset at zero, and only adjust it as it wears) , I work an okuma Multus 7-axis m/c & I have been programming with partial comp - the only problem is the m/c will not reconise a negaitive value in the TNR comp offset, I have resorted to reversing the G41 & G42 to get it to cut the correct way, has anyone else seen this problem before?

Thanks
Jason

[HuFlungDung]

I'm not a fan of using wear comp for cutter comp, but if I were , I would tend to bias the original tool diameter description so that the compensated path (with some wear amount) is always larger than the programmed path. As you may know, offsetting a profile outwards creates a legal path, but offsetting inwards may lead to cutter interference issues when certain radii and/or intersections disappear from the path.

[cncclimber]

you must be running a multus! I am also running one and have the exact same problem. apparently since the multus is more lathe than mill that is the way it works. seems like a pretty big oversight to me. it has created more problems than I would like to admit. luckily I prefer to use the tool dia for my offset but sometimes it is easier to program with the offset at 0(learning curve for the cam package). if you find a way around this, please let me know, my local okuma guru didn't know anyway around it though.

[budgieW]

This function is an option, You will need to order it

[cncclimber]

I didn't even know it was an option! I will have to find out about that, it makes life a living hell not being able to use a negative. Thanks.

[cncclimber]

talked to the local Okuma guy, he has never heard of such an option, Maybe only available in Australia

[budgieW]

Ah yes after reading your original post again I see the problem. Negative radius comp is a mill function