On Monday 07 December 2020 23:37:08 John Dammeyer wrote: > The attached photo is of the last time but this time it's not much > different. I've resoldered the posts, cleaned everything up including > polishing the posts and installed a new connector. With only a few > minutes running the connector is already quite hot. > > So I'm guessing the problem is in one of the middle layers of the PC > board and either the fibreglass is already so carboned up that it's > conducting or the trace for the one winding is pretty well toast and > has a high resistance therefore acting like a toaster. 8-( > > So it's a 1200 oz-in stepper motor with a 60V power supply moving the > knee up and down using a 3:1 reduction to the 0.25" pitch screw. > > Any suggestions for an alternative drive? Really don't want to get > another Gecko at $201.65 Cdn. > > Since I still have two extra HP_UHU drives and 2 STMBLs going to a DC > Servo motor wouldn't be any more expensive other than the work of > mounting it and maybe increasing the reduction ratio. So maybe I > should just look for an AC or DC Servo motor. > > John
I think I'd be measuring the ohmage and inductance of each winding in that motor. A partially shorted winding would be on my suspects list. They should match within a few %. A 10% diff would condemn it in my CET mind. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
