Steve, Martin; I have been doing some "goofing" and think I might have found some (to me) interesting bits.
The motors are 0.8A, 4.9 Ohms resistance, 3.3mH. (Circuitspecialists.com, 28BYGH501) I put in resistors, that I had kicking around, of approx 460 ohms, measured. (so sourcing 0.46A, if I figured that correctly from the G540 docs) Putting the step rate at 0.2mm/sec, adjusting the trim pots so that they are as quiet as possible, AND still tick over, seems to keep them quite cool. (I'm not sure what "cool" is with this design) Going down to the workshop for an hour or two of testing, but somehow it seems that that trim pot being misadjusted seemed to cause the overheating? I don't understand what that trim pot actually does. Also, will try to source correct resistors so that the motors actually are supplied with correct current. The power supply was measured at just under 40v output. (switching supply) I'll run it for an hour or two this evening, and see if the motors are cooler. Thanks for the suggestions to check the resistors - that could have been an issue. ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
