Search:

Well, the problem went away for a while and now it appears to be back. The symptoms now are that as soon as I try to enable the servos, the table begins to move to the -X. After about 0.1", the...

Mark,
I'm not sure how much it will help you, but, here is a link to what I did to make my KM-3 work with a VFD. It includes step by step instructions and schematics.
...

Thanks JAckal. I'll check the coupling next time I get out to the shop. I'm not sure if it's related, but when I first got the machine I would sometimes have errors calibrating the X. When it...

Ron,
According to the drawings that I have for my KM-3, here are the pinouts. This is based on having the original circular MIL connectors. The cable goes from J1 on teh CPU card to the back...

I've got my KM3 up and running and I thought all of the bugs worked out of it. Everything in the controller cabinet has been cleaned and reinstalled. I've been playing around with it attempting to...

Congrats on getting it working. What was the resolution to the last few issues? I was on vacation and was out of town for a while. I was thinking that maybe the motors were wired backwards.
...

With regards to the 115 not getting to the ACC relay. Do you still have 115VAC connected to the control relay board? If not, it should be connected to TB2-1 and 2 (hot) and TB2-23 and 25 (return). ...

Yes, the SER relay on the control board (relay K5) is the one that the personality board activates to send 120VAC to the ACC relay. Sending 120VAC to ACC will energize the ACC coil, closing it's...

OK, if you've removed alot of the original components look at doing the following.

1. Ground TB3-30. Don't send it to +24V, otherwise you'll have to ground the other side of the relay and reverse...

After looking at the schematics and taking a few measurements, I believe I've come up with the operation sequence.

1. COR (control voltage) relay is off and SER (servo or ACC relay) relay is off....

Even simpler, drop the power to the bus. Use the enable line from EMC to drive a relay that supplies power for the bus (ACC relay maybe). In series with the relay wire your Estop NC contacts. When...

If everything ran fine before the retrofit, the amps should be setup fine. Don't mess with the tuning pots.

If you have 60VAC going to the amps, you should see four LEDs lit on the fault card,...

The original inductive switches were made by Visolux. They were acquired by Pepperl&Fuchs a while back. The new number for the limit switches is 101XK5-1. Looking up the spec sheet for these shows...

Hmm, doesn't sound right. If you have the inductive switches (black plastic blocks) for limit switches, you should see 5VDC between the supply line and return. The third line (output) should change...

I understand that the disks are not formatted as FAT16 or even FAT12 as would be expected of a 720K disk. Instead Hurco decided to create a different format. What I'm after is the data structure...

Does anyone know the format of the floppies on the Ultimax II or have a PC program that reads them? I would like to be able to read the disks, (and possibly write to them) using a PC.

I realize...

Here's the first cut at putting together a document that explains what I did to convert from 3 phase to single phase.

http://home.windstream.net/rbalister/KM-3_conversion.pdf

Read over it and...

For the wiring changes, I'll make a copy of the schematic and mark it up with some instructions. It will probably take longer to document it than it took to rewire it. :)

As for the manuals,...

I've just got my KM-3 running at home on single phase 220. I ended up getting a small VFD and driving the spindle motor from that. The forward and reverse relays were rewired to drive the direction...

Thanks for the suggestion on the limit switch, however, mine are inductive switches not mechanical. Doing a quick check showed I had a bad limit switch. The original was made by Visolux. Visolux...

After spending some time for in the smoke of the New Mexico high desert for work I finally got a chance to do some more checkout.

Some things I've learned:
1. Trying to cheat and send 120VAC...

Well, between travelling for work trips and real work around the house I had some time to pull the supply and check it out. It turns out there were two shorted diodes in the input bridge. Newark...

Well bloke, it does appear to be the DC switcher. I saw it in the side of the cabinet last time I was working on it and meant to check it but ran out of time. I went to measure the voltage on the...

Folks,
I got a KM3 from work a few months ago and finally got around to trying to power it up. I wanted to find out what works and what doesn't before I went too far.

So far I've separated the...