Schaublin 125-CNC retrofit.

RotarySMP wrote:

I really , really want to install Lathe Macro's, but have the mismatch between my LCNC Version and your macros needing the latest. 
 

There are versions for both the latest (Bullseye + ) and older (Buster - ) here:  github.com/andypugh/LatheMacros/releases

RotarySMP wrote:

To be honest, I would be better off making a new spindle light with 4000K LEDs, as the current one is way up past 6500K, and totally screws up my white balance. If I make it, I would epoxy in a few magnets to mount it, freeing up the screw hole.
Mark
 

If you'd use the Maho a bit more the dried coolant snot would yellow up the light nicely and save you the trouble.

LMAO!!! Brilliant.

Hi Andy,
That is the sort of overview I was hoping for when I first went to your Github. If I had that, I would have installed the correct version straight away.

Probably my lack of familiarity with Github, as I didn't know to look to "release" on the RH side. Thanks for the clarification.
Maybe I can get it installed this weekend.
Mark

I need some help here guys please. I can't get my drives well tuned. Wout did a couple of calls with me to help me out, which has led me to a better understand the problem.

I am running JMC drives in analog mode.

There are some good videos out there on how to tune them in step/dir, but it seems no one else is using these in analog mode. There is a software provided by JMC to assist in tuning, which has a built in oscilloscope. This brings me to my problem:

The JMC software offers only a limited number of parameters you can select to graph on the osci.  The selection more limited in analog mode. In step/dir you can graph the following error. In analog mode you can't. There appears to be no parameter which I can graph which displays the following error in analog mode.  I contacted JMC, and they came straight back with "what is FError?", and when I explained I need a following error value, they have not replied since.

At one level, I can graph following error in LinuxCNC, but then I am limited to the 1kHz servo thread. It appears that the internal torque/velocity loops are closed in the JMC driver at 6kHz. The guidance I got from Wout is that I need to tune that higher frequency control loop first, before trying to tune the LCNC loop wrapped around it.

The best idea I can come up with to tune the JMC's torque/velocity loop, would be to make up a cable, temporarily set up a single axis of step/dir open loop control from LinuxCNC to the JMC driver/servo system in position mode, and one at a time tune my drives for the reflected inertia. Only once the drives are tuned on open loop STEP/Dir position mode,  then I can reconnect them to the current INI, switch them to analog mode, keeping the same tuning setting internally, and tune the LinuxCNC position loop at 1kHz using the LCNC Halscope.

Or is this a dumb idea? If I understand the cringlisch manual (I really understand much of it), it would seem that the internal values for certain parameters are simply ignored in analog mode, but that the others  would be retained as tuned.

To do this,  I would need a channel of Step/Dir. I am running MESA 7i92 -P2-> 7i85, then SS to 7i83, 7i84, 7i73 on this machine. It looks like I will need to flash my 7i92 with the G540X2D bitfile to activate stepgens, and then wire into P2.
Is there an easier way of doing this, where I don't have to upset my existing wiring by removing the 7i85? So I could access a Stepgen on P1, the 26 pin header of the 7i92?

I would appreciate any suggestions you have. If my whole idea is crap, and there is a better way of doing this, I am all ears.
Thanks,
Mark
ps. I still haven't gotten back to the Lathe macro installation. I dicked around with a couple of other things for the last couple of weeks, as my videos show

Mark,

Not a drive tuning expert, but is there a function in the JMC software that allows you to directly run the motors (i.e. through RS-232 or 485)? Might be able to tune the internal loop that way and not have to rig up a temporary S&D config through LCNC.

Switch the drive to S&D mode so you can see the internal FError (but command via JMC software), tune internally, then switch to analog and do the outer LCNC loop...?  Just spitballing here.

-Ralph