Hurco KMB-IS CNC update

Hi Robert,

I think we've got a kwik switch spindle wrench solution. Thanks for the pics.

And, we've got a line on a couple servo motors on Ebay. Most of them are the -049 suffix and we need the -089 suffix. Hopefully we can get them for a low price and then we'll find out if they work.

Leith,

I have been out of town all day and just got back... haven't had a chance to check in until now.

Good deal on the motors... hopefully you will get something that will work. I think really it's all about how long the shaft out the front that will matter. I am pretty sure they all have the same bolt pattern on the front of the motor...

Ok good deal on the wrench. I was thinking you still needed to do something is why I was sending pics. Was trying to give the cheap elbow grease approach LOL.

Ok I still need to try and get the parts manual taken care of for you. I have not pushed my Dad about getting everything out as he has been feeling rough for the last week. When I think he is feeling up to par I will get him to start pulling everything so I can scan the sheets. I will keep you posted about it and work on getting it done soon. Like before, if you need something specific let me know and I will start searching. Wish I had more done, but just not enough time.

Your moving along well, you have made a lot of progress figuring things out in a short period of time... you should be up and running way quicker than I was.


Robert

Got three used 0703-02-049 motors off of Ebay.

The only discernible differences between the 0703-02-049 and the currently installed 0703-02-089 motors is the leads and a slightly different location for the keyway. Fortunately, our machine isn't sensitive to either of these issues.

I installed a new-used motor on the Y axis, and it seems to work. I can apply +-1V across the drive input and get the Y axis to move in both directions. The over current light on the drive no longer comes on.

So I think I'm back in business.

I did look at some of the brushes. The new-used one I looked at was about 3/8 inches long. The brushes I've seen in the existing motors are about 1/2 inch long. Hurco says the brushes are good to go until they get down to about 0.2 inches.

I'm a bit reluctant to mess with/clean the existing motors... if it ain't broke, don't fix it.

Remove the brushes and blow some air through, does not break anything and the drive will thank you for not having to work more than it should.

First pass at Pi4/Mesa block diagram for the Hurco.

The idea is to keep the Pi4 in the pendant, run CAT5 to the 7192H in the RH cabinet. This keeps the HDMI/keyboard/mouse near the operator console. CAT5 cable is relatively small and should be robust over such a short distance.

Expectation is there will be a keyboard and mouse to run the LinuxCNC. And also some set of buttons and an RPG for manual movement control.

The 7I33 is probably not absolutely necessary. Could possibly use the Pi4 GPIO. But maybe the 7I73 is more compatible with LinuxCNC. Use of the 7I73 will require another CAT5 through the arm, but that shouldn't be a problem.

I haven't found a definitive ruling on the suitability of Pi4 with LinuxCNC. I happen to have a Pi4 lying around. Will start with that and keep the option open for some x86 based computer, the Odroid-H2+ looks promising.

Hello I am working on a hurco km3 refit and I came across this thread and has already given me a lot of useful information. Thank you! I had some questions about the e-stop circuit on how to find it and how to wire it into the mesa card? My machine was running briefly when I first got it home but only with one screen. Shortly after the other screen has went out and will cost more than I even paid for the machine to fix. So as it sits I can still power it up and jog around the axis. I made a short video showing some of what I have figured out so far and my cabinet looks very similar to the kmb. Any help would be appreciated on the e-stop circuit and how I should go about tying into the existing terminal blocks.

Link to the video:

just trying to save myself some headaches before I start disconnecting anything I don't need to.
I also have some close up pictures that I can post