Hurco KM3P won't zero home in x axis

[Jackal66]

I have a Hurco KM3P .This morning when I tried to zero the table it went over in the X-axis and I got
"Motion Error" & "Emergency Stop" errors. When it hits a limit switch usually I can bump it back manually and it is ok.

This time I took the cover off ( power off, too) and turned the x axis ball screw by hand about 2" in the direction off of the limit switch. It still won't home position.


Any ideas on what to check first?

Thanks,
JAckal

[underthetire]

Hurco used a funny little prox switch for homing, both our KM3's did the same thing. Both had low voltage on the 5 VDC line out of the power supply. I would check that first then adjust the power supply if needed. I always showed up on the X first, I think it was because of the longer run to the switch, loosing a little voltage normally.

[Jackal66]

Under,

Thanks for the info. I checked mine at the switch and it shows 4.8 volts.

How hard is it to adjust the power supply? Can I leave the volt meter hooked up the the wire feeding the switch and then adjust it up?

Thanks,
Jackal

[underthetire]

best to check on the power supply and adjust it. Just a little pot you turn, kinda buried under the grill, but you can get to it.. 5.1 volts seem to be the magic number.

[bloke]

The early Km3Ps had a little board mounted behind the card rack with six opto-isolators on. If you have no joy with the voltages, it may be one of the optos. They were H11G2 types.

[Jackal66]

underthetire,

Can you tell me where the 5v power supply is located?

Thanks,
Jack

[Jackal66]

Just found out it, is a bad servo driver.


JAckal