Good afternoon,

 

I've got a converted Bridgeport Interact which decided to give up the ghost
last week. I think that one of the servo drives/amps is dead, and am hoping
that someone can sanity check my troubleshooting before I start spending
money.

Before I removed any wires, I checked the wire numbers against the schematic
and put everything back in the same place.

 

Fault:

On power on, blows fuse/breaker.

 

Diagnostic:

1: Remove power + HV bus from X, Y, Z drives

Powered up, no axis movement possible

2: Connected power + HV bus from X drive

Powered up, X movement OK

3: Connected power + HV bus from Y drive

Powered up, X + Y movement OK

4: Connected power + HV bus from Z drive

Blew fuse

5: Removed X drive, put Z drive in place of X

On power up X motor ran at maximum speed until I hit e-stop

6: Put Z drive back in place, replaced X drive. Disconnected motor
connection only from Z drive

On power up X and Y movement OK.

7: Reconnected Z motor to Z drive

On power up Z ran at maximum speed until I hit e-stop

 

I'm pretty sure that the Z drive is dead - can anyone suggest any other
tests I should do?

 

Thanks
Ben

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