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You probably don't need ladder logic. I would think that it is do-able with HAL components. Maybe latch-on the spindle-enable when spindle commanded-speed is zero until measured spindle-speed is very, very near zero.

Maybe linuxcnc.org/docs/stable/html/man/man9/flipflop.9.html

I would need to experiment, but I am thinking setting "in" permanently to "true", clck being triggered by spindle-on ans reset triggered by spindle-off AND speed ~= 0.
(Spindle-off would be inverted spindle-on, and stopped status would use wcomp. )

This error appeared and continues to appear in versions 2.8.4 and 2.9.4 when executing G38.5. By tricking hal for version 2.8.4, the problem is partially solved.

It is impossible to verify that the problem has been solved in version 2.9.7 because a new error, “Queue is not empty after probing,” appears much more frequently in it (and in 2.9.4 as well) -
forum.linuxcnc.org/38-general-linuxcnc-q...bing?start=10#338958
github.com/LinuxCNC/linuxcnc/issues/3650

I already ordered a tube of Klüber LDS18, according to one of Rotary’s videos, this is the right stuff for the spindle.

It’s really unbelievably helpful to have resources from someone restoring the exact same lathe.

Make sure it's good grease!

Once it's in, it ain't comin' out.

You don't _need_ ladder for spindle orient, but you will need, at the least, some HAL logic and a second PID controller for position mode.

Mb2hal version didn't work great. I'm working on python hal component currently.
Meanwhile I made python app to drive FC01 inverter.
Available : github.com/dangervoid12/VFD-FC01-Monitor/tree/main

Do you still get this error without the flipflops and filters etc? Noe of this HAL complexity should be needed.

If there is a problem (possibly with repeated G38.2 commands) than please raise an issue on the Github so that it can be tracked. Not everyone reads every forum post (I don't) and so the forum is not a good place to report issues.

github.com/LinuxCNC/linuxcnc/issues

That's a relief, I didn't want to think that I had introduced yet another error when fixing something else.

If you are writing an interpreter to plug into LinuxCNC than it should probably be written in the same language as the existing one. That isn't to say that Python couldn't be made to work (I don't actually know) but there would be more to copy and adapt in C++

RotarySMP wrote:

... Starting over I would probably have just injected a little fresh grease. It is easy enough. 

 

OK, so I can just do that and tell myself I’m not being lazy — it’s science. We’ll make an A/B test and see how the machines behave over the years.
Yes, that sounds like it could actually be a thing.

 

It is not difficult to pull the spindle. I just welded up a U frame to pull against and used all thread to draw it out. 
Schaublin recommended disolving Kluber in some solvent like trichchlorethane which we cant get. I don't yet know whether I screwed up good bearings or saved them. Time will tell. Starting over I would probably have just injected a little fresh grease. It is easy enough. 

If the dovetail fits, you could also just drill and tap the height adjuster holes on the other side.You can never have too many tool holders

I wonder why the replaced the X servo, but left the Z one?

 

I've added U and W to the G7x cycles, but those letters cannot be used outside the subroutine interpreted by those G7x codes.

Change the belt and leave it for now.

Focus on what does not work, then make little improvements.

Thanks ... that confirms what I suspected. I really hope the auto-tuning on the Delta B3 drives works better once they have the proper inertia of the machine. Running them completely without load probably doesn’t give the controller anything meaningful to work with.

I’ll revisit the tuning once everything is mounted mechanically. Fingers crossed that the B3’s auto-tune behaves more reasonably under real conditions.

The question about the grease in my head is that the spindle seems properly lubricated right now — no strange feeling, no signs of anything bad. So if I pull the spindle and put it back after installing the replacement belt, I’m hoping I won’t make it worse than it is. When it comes to regreasing these high-precision bearings, I’m hesitant — I’d rather learn on less costly spindles first.

Regarding Mach: the seller provided a copy of his Mach3 folder. I didn’t know this before, but you can just put that folder on the PC and it works—no installation, no configuration, no compiling anything custom.