Originally Posted by
dunnitagain
Well I checked the DC voltage at the drive. At turn on the voltage on the taps at the drive instantly goes to 345 VDC. The taps at the drives are the same. I checked the signal at P17 on the Mocon Board ,it slowly builds from 2.300 VDC to 2.55 VDC as you watch it. Also the fan on the VD doesnt run at fire up, is it a temp controled fan? One more question is it better to err on the lows side of the voltage taps on the transformer? my voltage measures 214 at the breaker. But drops to 207 with the spindle running. The voltage taps change at 210. Thanks for all your help. Dwayne