Power Supply Question

[dave-w]

I'm getting ready to upgrade an older Bridgeport with servo drives and Anilam Crusader II controls. My plan was to reuse the servos and power supply since they were still in operating condition. I'm not sure if I can use the power supply as it's currently configured with the ALLIN1DC controller. There is a single transformer with multiple taps that feed 3 individual rectifier/cap circuits (one for each axis). Can I just wire the output from the caps to the power supply of the ALLIN1DC? A picture of the current power supply is attached for clarification.

[Centroid_Liviu]

It would depend on what the capacitor/rectifier is rated at. The ALLIN1DC can handle up to 180VDC coming in for its DC drives. I have attached a schematic showing a setup with our 110VAC power supply kit.

[diycncscott]

Dave,

Do you know if they are all different voltages?

[dave-w]

Dave,

Do you know if they are all different voltages?

I haven't measured them, but the schematic shows the same values for the caps. I'm assuming they are. The motors are SEM and are rated at 140VDC. I wouldn't imagine the power supply exceeds that, so I should be good to go on the 180VDC limit.

I'll put a meter on them today and report back.

-Dave

[dave-w]

It appears the transformer may no longer be transforming. I have 120VAC in the primary, but the secondary windings have no output and there was no reading at the caps.

Will your "110VAC Power Supply Kit" be suitable for my machine? What is the voltage output?

The motors are made by SEM. The X&Y servos are rated at 142 volts, 30 pulse amps, and 3.0NM torque. The Z servo is rated at 140volts, 21 pulse amps, and 1.5nm torque.

[Centroid_Liviu]

Our 110VAC Power supply kit will output 110VDC. There should probably be no issue using it with your servos. Worst case scenario you will lose a few RPM at the top end. I have attached a full wiring schematic.

[AMDlloydsp]

Although I won't discourage you from buying the Ajax power supply (because it works well), there's little chance that your "transformer is no longer transforming". That would require an open winding, which (having been in the transformer business) I can say is rare to almost negligible in likelihood. More likely is that you have missed a jumper between taps somewhere.

LLoyd

[Marik]

Make sure you are reading voltage on the capacitor on DC. If still no reading check if you can read secondary transformer windings on AC. If still no luck check the transformer for the open windings.

Allin1 takes only one input voltage for the motors, so to boost the current you can connect all three windings on your transformer in parallel, and then use a 50A rated bridge and connect all your capacitors in parallel.

Best, M