Originally Posted by
mikegiraud
Wanted to follow up on this to close out the issue for anyone who may choose DMM 400W Nema 23 motors for a G0704 sized machine using direct drive. It turns out that the 400W Nema 23 motors from DMM and the Dyn4-L drives at 120VAC are a bit marginal for the G0704 X and Y axes. I returned them, installed the 750W Nema 34 motors with Dyn4-H drives at 240VAC and the random alarm issue hasn't appeared in a few days of machining. So in short, stay with the Nema 34 motors or use a 2:1 reduction if you must use the 400W motors.
I'll reiterate that DMM was absolutely awesome to work with. They provided support above and beyond not only with this issue, but the RMA process was fast and smooth. Also, they took the time to sketch up some wiring diagrams specifically for my BOB and held my hand through wiring up the 24VDC Z-axis brake. I'll definitely be using DMM servos on my future projects.
Thanks again to Mactech54 and those who chime in to help.
-Mike
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