[gunmaker]

Maybe I haven't explained my self very well. I'm looking for an uninterrupted cutting motion making a great machine finish that will still need a day or more of hand polishing. Any little divot caused by the cutter dwelling waiting for the brake to cycle on and off will add hours to finishing my project.

I ran a test program. The 4th axis moves were constantly stopping waiting for the brake to turn on or off. After setting the Auto Rotary Brake parameter to no, the program ran smoothly.

Here's all the A axis moves isolated from the program. Each one making a divot.

N350 G93 X-20.5532 A309.801 F2003.6
N360 X-20.5562 A309.541 F1719.8
N370 X-20.5588 A309.127 F1603.2
N380 X-20.5608 A308.588 F1602.6
N390 X-20.5621 A307.96 F1719.8
N400 X-20.5625 A307.287 F2003.5
N410 A128.29 F8.5
N420 A52.714 F20.2
N430 X-20.5621 A52.04 F2003.5
N440 X-20.5608 A51.413 F1719.8
N450 X-20.5588 A50.874 F1602.6
N460 X-20.5562 A50.46 F1603.2
N470 X-20.5532 A50.2 F1719.8
N480 X-20.55 A50.111 F2003.6

[Brian L]

Well, it sounds like you found your solution, don't use the brake...

setting the Auto Rotary Brake parameter to no, the program ran smoothly.