5771
General Mach Discussion / Re: Simple Threading Wizard Problems HELP
« on: September 11, 2009, 06:23:02 AM »
What Hood recomended in reply #13, is, the code posted will include all the pass #'s and all the x & z axis moves for a G32 ( instead of G76 code ).
There is no problem with the code ( g76 or g32 ) so don't see any reason to hand code. Should that xz move happen you will then know what pass it happened at, but, it's kind of random around the 6 th to 12 th ( somewhere in there) if memory is correct. Changing the speed and feed will change the rpm variation you are experiencing.
The problem is not the result of the generated axis moves in the code. So changing the code would be fruitless. The xz axis move you experience has to do with the thread programing as said before.
You can try changing the settings for the infeed angle in the wizard. I use 15 degrees for a deeper thread, like 13 to 20 TPI. This way your flank cutting and the motor load is not as great. You can probably reduce the load by 50%
( roughly speaking as i would need to calc the HP differences, and the calcs are rather subjective ).
Mach monitors each thread cycle and adjusts the mext cycle according to rpm variations.
Try reducing the tool overhang or make it more rigid to reduce chatter. Of course cutting fluid / speed / depth of cut also come into play when cutting internaly or externaly.
RICH
RICH
There is no problem with the code ( g76 or g32 ) so don't see any reason to hand code. Should that xz move happen you will then know what pass it happened at, but, it's kind of random around the 6 th to 12 th ( somewhere in there) if memory is correct. Changing the speed and feed will change the rpm variation you are experiencing.
The problem is not the result of the generated axis moves in the code. So changing the code would be fruitless. The xz axis move you experience has to do with the thread programing as said before.
You can try changing the settings for the infeed angle in the wizard. I use 15 degrees for a deeper thread, like 13 to 20 TPI. This way your flank cutting and the motor load is not as great. You can probably reduce the load by 50%
( roughly speaking as i would need to calc the HP differences, and the calcs are rather subjective ).
Mach monitors each thread cycle and adjusts the mext cycle according to rpm variations.
Try reducing the tool overhang or make it more rigid to reduce chatter. Of course cutting fluid / speed / depth of cut also come into play when cutting internaly or externaly.
RICH
RICH