Need help with machine definition settings/post

[ddm]

I'm trying to resolve an issue with my MD file and post not putting in intermediate A-axis moves. Can somebody please see what I'm missing here?

 

Machine setup is a basic VMC 4-axis Fanuc control with the rotary on the right side of the table, A-axis rotating around X so that if you are looking at the face of the rotary the face moves clockwise for the + direction....obeys right hand rule.

 

The rotary will go continuous from 0 to 359.999. If you command -30.0 deg it goes to 330.0 but in the minus direction...takes the shortest route. So it does the exact same thing if you command 330.0...it moves in the minus direction. If you command -330.0 it goes to 30.0 in the positive direction...again, the shortest route.

 

I have a cylindrical piece of stock and from the top view a line drawn at 45 deg from the center of one end. Using contour with axis substitution I am wrapping the cut (line) around the cylinder to make a spiral (helix). The cut looks fine in Mastercam (X7) but when I post it there are only 2 positions...the start and the end. But the start and the end angles are not very far apart so it takes the shortest distance (rotation) instead of the long way around.

Ex:

G20

G0 G17 G40 G49 G80 G90

T252 M6G0 G90 G54 X0. Y0. A0. S2139 M3G43 H252 Z2.75M8Z.95G1 Z.725 F6.4X4.4593 A340.662 F352.5Z.925 F6.4G0 Z2.75M5

I recognize I need to break up the A-axis moves so it walks it around closer to the final angle before it reads that A340 command but I have tried every combination I can think of in the machine definition file. Attached is a screenshot of my settings.

 

Any ideas?

[WestRiver]

Try doing it in incremental (g91) programing