Hurco KMB-IS CNC update

Leith,

Looks like you are making progress...

Here is the electrical side of the emergency stop string with the air switch. This was for my type of machine, but yours should be pretty much the same. I will see if I can find the air circuit. This might not work with your other setup that you just got, but will give the idea what Hurco did with the wiring.

I am still doing some long hours each day and will be back with more eventually.

Robert

Thanks again Robert. That's some pretty timely information.

I have just about resurrected the compressed air system. Acquiring parts for the oiler system.

I guess "COR" is the symbol they use for contactor?

Without detailed knowledge of the E-stop and compressed air interlock, I had assumed I needed to have the compressed air system working before applying power.

Since I'm planning on connecting directly to the servo drive AC input power and the DC supplies AC input, these interlocks won't be working at initial power up. Although I am intending to restore those functions eventually.

Since there will be no E-Stop, I need to be extra careful about crashing an axis.

Nonetheless, this is very useful information. The next question is, where do the limit switches connect in?

Leith

And as long as I have your attention.

We're trying to decipher this Kwik Switch 200 thing. We have a Kwik Switch 200 end mill holder inbound.

But we have no idea how it actually locks into the quill. And we don't have the Kwik Switch 200 wrench.

But I'm wondering about this air cylinder on the quill drive. Does this have something to do with Kwik Switch 200, or maybe some quill brake thing??

Leith,

Ok just got back in town... still have work to do, but have a little easier day.

The COR relay is one of the K5 type relays where the block of 8 relays on the board is mounted. I will pull and attach where I have the K5 relays listed as what they are. I don't have the REV or COR relay listed on the sketch, but what the COR does is pretty much supply the main power connection to the controls when you push the power switch on the pendant. In other words, when the COR relay energizes it will send power to several other sections and "latch" power to the circuit where you push the power pushbutton When you see the emergency stop schematic, the left side of the string shows the "Pendant Power Pushbutton" just above the TB3 connection #1 and #2. So when you operate the pushbutton, it energizes the circuit and the COR relay enacts and keeps the circuit latched. As long as you have power to the main cabinet power supply, then the circuit should be powered and should work when you push the power button on the upper left side of the pendant. You will also need air pressure on the pressure switch as that is part of the circuit, but all of the wiring should be wired up just simply need to plug off the air down stream of the pressure switch so you can put air to it temporarily. Plus the emergency stop should still be wired up. If for some reason it is not, then I will check to see which 2 terminals to connect to on the TB3 connector to make the emergency stop switch loop.

Also, yes the air solenoid on the side of the head could be what supplies the air brake. I do not know how it looks on your machine as it is pretty large on mine. I doubt it will be that big in yours. Will find pics of mine, but I believe you have seen it before on the web when looking at other retrofits. You should be able to grab and spin the spindle. If you cannot, then the brake is on or something locked up. Mine only enacts when I have the air pressure up and the control on. If it just has air only, the spindle brake is off and you can still spin the spindle. With this said, when you get everything working and trying to get the brake working, you can test by trying to spin. You should hear the brake come on when it enacts anyway.

The Kwik Switch tool just simply goes right up into the spindle and the nut will spin and lock in place. The nut is spring loaded and will flip around on its own. If it does not work smoothly or correctly, then some maintenance will have to be done as the toolholder could potentially fall out. I will try to shoot a video of mine and you can see it in operation. Super fast tool changes, you will love it.

Here is the schematic showing the K5 relays





I know I didn't answer everything, but I will be back and try to answer more in a bit.


Hope this helps,
Robert

Powered up the beast this evening for the first time in at least 15 years.

No smoke.

Was popping the shop GFI though. I was using a variac autotransformer to generate the servo drive AC. Apparently they require a fully isolating transformer. On the hunt for one now.

So I disconnected the variac, and the fans come on and after a minute or two:


Tried to load both sides of the tape. It does spin for a while but then I get:


I'll probably play around with the tape drive. Try to clean the heads, etc. It would be cool if could get the Hurco control program to run.

But its not critical. Really trying to see if the servo system works before converting to Linux CNC.

Hey Good Deal, your making progress now..

Ok yeah it is asking to load the master program.... And unfortunately the tape is probably the last job ran on the machine. Ok, so now if it is possible to find the Hurco tape, then you can get it going. Looks like it may be working ok.

I know that I don't have a functional tape, but I did not try at all to get one as I was already committed to doing a LCNC retrofit way before the MPU board lost the master. I had the upgrade with the master burned onto a ROM, therefore you did not have to worry about the machine being plugged up to power all the time. The original control was only good for 15 minutes un-plugged, past that time you had to re-load the master program using the parameter tape.

Ok the hunt begins, as that would be great if you could fire it back up.... would be able to test a lot of things quickly. Plus, out of curiosity could run that job tape to see what they were making. I would be curios if it did work...

Will have to see what I can find myself even. What is bad is I saw the tapes on Ebay about a year ago, but someone snatched them up and I did not need them anymore. Wish I had them now.


Robert