C-Axis Milling

[dgriffiths]

I have a program on my Doosan Mill/Turn that is doing some extensive C-axis milling. The problem is every time the C-axis code changes from positive to negative (ex C1.32 to C-.604) the C-axis is making a very abrupt, almost rapid, 180 degree rotation. So essentially the C-axis is taking the long way around to get to location. Any ideas on how to fix this. The program will not run as-is. TIA.

[Hardmill]

Send it over Don ill take a look this eve

You got my email addy

 

 

 

 

 

 

 

 

 

 

 

 

 

PEACE

[Chris Bloedorn]

Try changing the continuous axis type in your machine definition...

 

[dgriffiths]

So thanks to some help from Hardmill I think it has to be a parameter setting at the machine (Fanuc 18i-TB). The code from mastercam is good. The link below shows a video of the problem. Watch at around 36s. The tool is in the cut when this happens. It looks like parameters 1006 and 1008 might be the key but as far as I can tell the bit settings look correct.

 

[htm01]

i had that on our mazak and it was a parameter problem that Jeremy helped fix.

[jfranya]

Similar issue on our VTL that was retrofitted for using live tooling. We used an M code (I believe it was M126/M127) which told the machine to travel the shortest distance. BTW it has a Heidenhain Mill control.