[caddysnponys]

Good day all. I have a 2006 VM1 Ultimax with Yaskawa VS626 spindle drive. When I try and run the spindle it will only turn very slow and then will fault out with a OL1, which is a Current Over Load. Even if I try to increase the speed manually, I get the same. The control read out shows the input increase but I get nothing at the spindle. Yesterday I put the Spindle drive in digital operation so I could jog the spindle from the drive and received a PGO - Pulse Gen Open Circuit alarm after about 5 secs of turning slow. That one threw me for a loop and must say I didn't expect to see the PGO. I'm not sure if that came from me trying to jog from the panel or is that a legit fault.

Guys, I know its dang near impossible to diagnose stuff like this without being there, but any help would greatly be appreciated. Other then the spindle issues, this is a very nice machine that I want to keep. I don't want to walk away from this machine.

[servtech]

Good day all. I have a 2006 VM1 Ultimax with Yaskawa VS626 spindle drive. When I try and run the spindle it will only turn very slow and then will fault out with a OL1, which is a Current Over Load. Even if I try to increase the speed manually, I get the same. The control read out shows the input increase but I get nothing at the spindle. Yesterday I put the Spindle drive in digital operation so I could jog the spindle from the drive and received a PGO - Pulse Gen Open Circuit alarm after about 5 secs of turning slow. That one threw me for a loop and must say I didn't expect to see the PGO. I'm not sure if that came from me trying to jog from the panel or is that a legit fault.

Guys, I know its dang near impossible to diagnose stuff like this without being there, but any help would greatly be appreciated. Other then the spindle issues, this is a very nice machine that I want to keep. I don't want to walk away from this machine.

Disconnect the motor and check the windings with a multimeter to earth and phase to phase for a short to ground. If you have a Megger ohm test meter and know how to use it, test it with that.

Check the wiring from the drive to the motor for damage. If everything checks out externally with motor and cables, the problem is likely to be the drive, transistors etc. So the drive will need checking out and repaired.

[servtech]

Good day all. I have a 2006 VM1 Ultimax with Yaskawa VS626 spindle drive. When I try and run the spindle it will only turn very slow and then will fault out with a OL1, which is a Current Over Load. Even if I try to increase the speed manually, I get the same. The control read out shows the input increase but I get nothing at the spindle. Yesterday I put the Spindle drive in digital operation so I could jog the spindle from the drive and received a PGO - Pulse Gen Open Circuit alarm after about 5 secs of turning slow. That one threw me for a loop and must say I didn't expect to see the PGO. I'm not sure if that came from me trying to jog from the panel or is that a legit fault.

Guys, I know its dang near impossible to diagnose stuff like this without being there, but any help would greatly be appreciated. Other then the spindle issues, this is a very nice machine that I want to keep. I don't want to walk away from this machine.

Disconnect the motor and check the windings with a multimeter to earth and phase to phase for a short to ground. If you have a Megger ohm test meter and know how to use it, test it with that.

Check the wiring from the drive to the motor for damage. If everything checks out externally with motor and cables, the problem is likely to be the drive, transistors etc. So the drive will need checking out and repaired.

Btw. Is the spindle free to turn by hand? Not tight or brake dragging?

[caddysnponys]

First off thank you for taking your time to help, cause I do appreciate it a lot.

Ok i will check the motor now.

As far as the spindle being free, when the machine is off or not commanding the spindle to turn its turns smooth as silk. However I did notice yesterday that when I commanded jog from the drive I hurried back around the machine to the spindle, realized it wasn't turning (after commanded)and tried to turn by hand and it was tighter than a banjo string. Almost like a brake was being applied.

[caddysnponys]

Disconnect the motor and check the windings with a multimeter to earth and phase to phase for a short to ground. If you have a Megger ohm test meter and know how to use it, test it with that.

Check the wiring from the drive to the motor for damage. If everything checks out externally with motor and cables, the problem is likely to be the drive, transistors etc. So the drive will need checking out and repaired.

Btw. Is the spindle free to turn by hand? Not tight or brake dragging?

Hey Servtech. the motor check out good. Would you know any tests i could perform on the driver to see maybe that's the issue?