C axis milling

[Boygofast]

I have just inherited a VTC. My post isn't proven, but that's not a total issue at the moment. My problem is that when I try to mill a simple straight contour slot that requires the relationship between X and C stay constant, my slot is curved. Is there a code that takes care of this?

[Bryan Johnson]

if the X-offset is off, the slot will be curved.

With C-axis milling, to move a feature, you can not simply offset the X axis. For example, if you program a 1" square, and the offset X .25, you will not get a 1.25" square. The 4 sides will be curved because X/C values would need to be changed in the program.

 

If the control has the option to convert XY code, to XC motion (maybe G114), you could do a test cut to see if it is a problem with the machine setup or if the problem is with the code.

[The_kid]

Check to see if the tool is on center of rotation.