OLD HURCO MILL

[turningman33]

Need help with a mid 80's KMB1. Anyone out there still using, or know anything about this ancient technology? Having problems with the spindle drive. Spindle won't start up at all, but axis servos and everything else seems to work fine. Can anyone help????

[jalessi]

Tman,

The best solution is to replace the Hurco spindle control with a VFD, it will make a tenfold improvement in reliability.

They are available in single or three phase input models.

http://tinyurl.com/6oj4qw


Hope this helps,

Jeff...

[turningman33]

Thanks,

I was also told that it could be the spindle drive boards in the left side of the cabinet as you're facing the machine. Do you know anything about this? The boards have LED lights, but I'm not sure if they're supposed to be on all the time and what they're supposed to read if the board is functioning properly.

[jalessi]

Originally Posted by turningman33 Thanks, I was also told that it could be the spindle drive boards in the left side of the cabinet as you're facing the machine. Do you know anything about this? The boards have LED lights, but I'm not sure if they're supposed to be on all the time and what they're supposed to read if the board is functioning properly.

The best solution is to replace the Hurco spindle control AKA "spindle drive board" with a VFD, it will make a tenfold improvement in reliability.

They are available in single or three phase input models.

http://tinyurl.com/6oj4qw

The spindle drive board is very problematic however if you want to try and troubleshoot it I would be happy send you the schematic.

Jeff...

[turningman33]

That would be very helpful I believe. With that, can you help with some instruction as to the testing procedure for these boards? I'm told that sometimes maybe only 1 board out of the 6 or 8 that are there can go bad.

[Buddy1]

The original drive is a Parajust 'A' unit. There are 6 driver modules, 3 on each side. remove power from the machine and be sure to check for any lingering voltage on the large bus caps. When sure there is no power left then do the following:

There are two flat head screws on each Driver module. Do this one board at a time. At least one terminal will have a single wire, remove this so the the terminal is empty. Use a Multi-Meter that has a Diode check on it. With the meter in diode mode, check across the two terminals then reverse the meter leads and check across the terminals the other way. One way will be OPEN and the other way will read approximately .400. (.370 to .440). If any module is shorted either way then it is bad or if OPEN both ways. If you need these boards go to www.amtsinc.com

Buddy