Re: Overheating
Did you see this article on Gecko's web site?
https://www.geckodrive.com/support/g...atsinking.html
Homann has a heatsink kit,
https://www.homanndesigns.com/index....roducts_id=339
If would start here.
I wasn't using Geckos but I had similar issues recently with some high quality Lam Technologies drives. I was driving them with 64 V AC ( 1 volt below their max) which was feeding the motors about 90 volts DC on my plasma table. I set the system up to give me 35 m/min rapids and 5 m/sec/sec acceleration. I have a very tortuous 1200 x 1200 mm nest of parts. It was actually the motors that got hot and one side of the gantry would miss steps big time becasue they overheated.
So I implemented Lam's boost technology so the current to the motors was reduced by 50% when at rest or cruising at constant velocity. (I don't think this would be possible with Mach but Linuxcnc allows me to write custom components). This fixed the motors overheating, but then the drives themselves overheated and triggered the fault signal that allowed Linuxcnc to stop gracefully. I had the drives stacked one above each other so the top drive faulted as it was being heated by the ones below. So I rearranged the drives so they were all side by side and enabled a fan in my cabinet. So this fixed that, then the plasma cutter overheated despite being rated for 100% duty cycle at that current! Man it was a tough test!
Rod Webster
www.vehiclemods.net.au