Need Help!- Haas VF4 with direct drive spindle

[Race 10]

I have a 1999 Haas VF4 with a direct drive spindle(no high, low gear box). When I start the spindle up from a stopped state I can go right to 7500 RPM and most of the time it will start right up. When I press spindle stop I will instantly get a alarm. The alarm number is 163 Spinlde Drive Fault. I will also get the alarm if I try to go from a low rpm (250 or so) to a high rpm (6000 or so). I have checked the incoming power and made sure the taps are set on the correct voltage. I am not sure where to go from there though. Any help is greatly appreciated.

Thanks,
Jeff

[Bryan33]

Your problem is your regens. The Vector drive dumps the voltage to the regens and when they are bad is it stuck in the drive and alarms out

[haastec]

Yep, sounds like the regen. Shut the machine off and leave it sit for about 20 minutes to let the high voltage dissapate. Verify that the high voltage light is not lit on the vector drive and disconnect the regen at terminals 1&2 of the vector drive and measure resistance between them. If memory serves correct it shoud be about 8.4 ohms.

If it does not measure correctly, contact your dealer for a replacement and have them confirm the ohms rating on it.

Good luck.

[Bryan33]

Well if you give me the sn i can tell you what the ohms should be. It is different now a days

[Race 10]

The S/N is 17639

[Bryan33]

That machine has a 20ohm region

[Race 10]

so if it is at 9ohm its bad?

[Bryan33]

Ya that is not good. The part number you need is a 93-1030 its $250.00

[Race 10]

ok. now i might have(clue)! Thanks guys for all of your help!!!!!!!!

Jeff

[haastec]

Eh! 8.4 ohms, 20 ohms; I wasn't far off. LOL

Thanks for the correction Bryan.

[Bryan33]

No problem I have the benefit of being at the factory. Lots of info at my finger tips