My servos overheating

[GEORGETOUBALIS]

Hi.!
I need your opinion about a problem.

My motors are
http://www.motioncontrolgroup.com/pr...formance-specs
Voltage rating up to 90 Vdc
Rated Speed: 4000 RPM
Rated Power: 245 watts (0.33 HP)
Current at Cont. Stall Torque, o-peak A dc 5.56 Amp
Current at Peak Torque, o-peak A dc 38.93 Amp
Resistance, L-L R 1.33 ohms

I finish the power supply
http://www.cnczone.com/forums/showthread.php?t=47073
I was told to engineer to make it 75 V DC 30A
the p/s by a mistake I think is 92-93 V DC 30A.



I take the risk and I power up my servo controller which has a label that says "Max Input voltage 80V DC"

Nothing wrong happened..(Like smoke) The number of Errors were reduced but not eliminated.
It is strange but I got an error when the system stays with out motion for 10-15 min.
when I reset it and start the mach 3 immediately works fine for 15-30 or 45 minutes without problem.

After a few tests I realize that the Z axis motor is overheating
All motors has a temperature about 100F. The Z Axis motor has more than 180F (I can' t left my hand on it more than 2-3 sec)

do you have an idea why all these happened to me (the errors and the overheating servo motor)

thanks
George Toubalis

[unterhaus]

the voltage being too high is probably not a good thing. You may have your gain set too high and it is overheating due to the high voltage at zero velocity. For whatever reason, your link didn't' work

[SpeedsCustom]

Check that your resistors are letting the right amount through, if you have resistors.

-Speed