Originally Posted by
SEK22Hornet
Last weekend I had some parts that I needed to run - the mill did it's usual stunt - start the program and anywhere from a minute or two into the run the spindle would just shut off - hit the feed hold or tool check and and resume the program and all was well for a few minutes, then it would do it again. Fought with this for a couple hours and gave up. I went ahead and picked up an Acorn board and 3 MachDrive BRC step and direction brush type DC motor drives. these are rated at 150 VDC at 20 amps. Still had parts to run this weekend, so I went back and tried the mill again - it stopped once then let me run the parts with no problem after that. So I tired to figure out what the difference was. Last weekend, the shop floor was soaking wet with humidity. this weekend it was pretty much dry. - hmm made me wonder. My shop is not temp controlled (obviously) and last weekend the humidity was literally dripping off the machine. This weekend, just the floor of the shop was wet. I put small light bulb in the control cabinet Saturday - Ran the machine Sunday with no problems at all. I think my intermittent problems with this machine are probably related to the environment! Time will tell, but I may not need to replace the controller after all.