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I got distracted with the mechanical side of things again. I decided to take EVERYTHING apart for a deep clean. Including the ballnuts and the linear guide trucks. What a PITA. Then I decided to...

I did the run-in on the rebuilt spindle and set up the limit switches and soft limits in Kmotion. I have the 3 motion axes homing and played around with configuring them in KmotionCNC and everything...

I adjusted the amplifiers (Amplifier manual called it Cal Speed) to use as much of the DAC range as possible after I gave up on the 400ipm rapids. I might be overly cautious, but I never liked how...

Well now I feel dumb. I realized that the axis is momentarily disabling before each move, and the move is starting from a position that deviates from the commanded position by however much the axis...

So I'm stuck here. I got the Y axis to where I'm happy with it, but the Z is stumping me.

The Z axis on this machine is fairly heavy, and does not have a counterweight. It servos and moves OK,...

Now that the axis is behaving as expected, I started over trying to tune it.

I have been unable to find settings where it seems happy with both a 400ipm rapid and a low following error. I care a...

Thank you Tom.

Glad to hear I'm not going crazy. And you are correct that as long as I have the drive enabled/disabled with the axis, it doesn't matter. But in case I do something stupid, like...

OK, So I tried your code for printing an error message to the console only when the axis state changes to disabled. This works as expected.

I then added the following into the for loop with the...

Hi Tom,

I appreciate the help, that makes sense that it would create a backlog of axis disabled messages. I didn't think of that. I will try your code shortly.

I've attached an image of the...

Hi Tom,

Thanks for the reply,

I will try setting the gain on the drive to use as much as possible of the DAC range. 400ipm is only using 2/3 of the drive/motor combo maximum speed, and the...

So I've added the code from watchenable.c to my initialization file in progress. So the axis actually stops when disabled in kmotion. I still think something might not be right though with the DAC...

OK, more confusion.

When things have gone unstable/ran away, I've been hitting the physical estop button, disconnecting the servo drive enable inputs from the +24v power supply. It's easier and...

OK I have the axes servoing and holding position. I am attempting to tune the X axis now.

Question for Tom if you're still watching this: Do you recommend I change any of the tuning pots on the...

Update:

The spindle is rebuilt and installed. The drawbar is rebuilt and installed. Custom pulleys built and installed. The ethernet connection between the PC and the Kogna seems to be fine after...

I have everything wired up, basically per the last diagram. I fixed a couple minor things and changed a few things about grounding.

I also built a front panel and mounted the touchscreen monitor,...

Attached is the latest version of my wiring diagram (mess).

I gave up on the resolver to encoder converter, and got ahold of another Compax3 servo drive, this one is resolver based. I also bought a touchscreen monitor and micro form factor PC for this...

I'm still working on it. I can't seem to get the Compax3 drive with resolver-encoder converter to work for commutation, and I'm waiting on another servo drive. I've ordered and am waiting on most of...

I've attached a diagram of what I've come up with for the physically wired part of the Estop system. All servo drive enable inputs are powered from the output of the delay relay, so when it opens all...

So I think I've fixed it, I now have the encoders channels A and B going to the differential inputs on JP8, and the index pulses going to the differential inputs on JP14.

All switches, drive OK...

This is where my being electronically challenged is showing itself. I did read the document you linked before I created the wiring diagrams, I just ended up thinking that it meant only single ended...

Thank you Tom! I really appreciate the help. I probably should have diagrammed out just one axis first, to make sure I wasn't as confused as I seem to be.

I can move the switch inputs to the...

Hi,

I’m starting the retrofit process of my 1995 Milltronics Partner 1 VMC control to a Kogna/Kmotion control. I’m also making a few modifications as part of the process. My goals are to end up...

Thanks!

Eventually I'll post a build thread and ask for feedback on my wiring plans once I get that far. Right now I'm still researching and trying to decide about a bunch of ancillary stuff.
...

Well the decision is made, I ordered a Kogna and Konnect board this morning. I still need to collect a ton of other stuff before I start tearing into the machine, and it probably won't happen until...

Is there some reason you would suggest I DON'T go with the Dynomotion retrofit? Because I looked into several of those options before starting this thread.

-Nate

I was referring to closed loop motion control as feedback from the motor to the controller as opposed to the type of open loop control that basically just issues commands to stepper motors (or servos...

I get your point, and maybe I would do more research and be more inclined to go that route if I were building a machine from the ground up. (And if budget wasn't an issue) As it is, inter-operability...

Craig- A while ago I looked into and am not really interested in the open loop controllers. I want to end up with the most robust and customizable setup, not the simplest and cheapest. A major goal...

Craig-

That's kind of the point, I want to understand the system I have well enough that I can upgrade it with a new part when something breaks rather that try to repair or source obsolete parts....