orient spindle with ethercat EL5101

Hello,

I would like to be able to orient the spindle in position.

The spindle encoder is a 1024-line encoder connected to an EL5101.

I've already set up a PID to control the spindle speed. The settings could still be improved, but for now it works and is acceptable.

However, for now, I can't get the spindle orientation to work. I'm not proficient enough with HAL to see where the problem might be.
If I start an M19 R10, for example, the spindle starts spinning and never stops. I've changed the PID values, but to no avail.
I have the impression I have an index problem, and I can't see it in the HALscope.

I'll send you the HAL and INI files, in case any of you experts spot a bug...

   

Thank you in advance for your help.
Laurent

Probably not the issue, but you should have these lines as the bottom-most addf lines The addfs are executed in some order and these lines should be the last.

debug with halshow.

disable the spindle's motor,
run M19, then see if <mux2_orient.out> become less when u rotate the spindle manually to the right angle. the pin <orient.poserr> can tell u that if ur direction is right.

the expected result is: <mux2_orient.out> follows <orient.poserr> both become less, utill <orient.is-oriented> become true, so <mux2_orient.out> will be 0, means M19 is done, spindle could stop now.
if the pins work as expected, the problem maybe in pid component.

btw, i haven't configured a spindle orienting hal code with frequency converter, i use a servo spindle, orient in csp mode. it works nice and could lock at the angle after orienting.

mux2_orient.out always remains at zero (-0.01397) and doesn't move.
And orient.poserr decreases

The attached halscope (in halshow, I can't display orient.poserr)

 

your orient pid params in ini file, their values is 0, why?
you need to gradually debug these values.
all are 0 it's wrong. At least P and D have non-zero values.

To set the PID for the spindle speed, I had to set FF0 before setting P and I, otherwise it would go straight to maximum speed.
So, I started the same process, I reassessed everything, except for trying to set FF0 to 0 and only play with P and I.
I just did it, and ohhhh!!! It moves and stops (only for small angular movements, about 10 degrees, and it's not always reproducible). Above that, it's unstable and starts spinning at full speed.

Well, first of all, it's not a hardware problem, the hal seems to be working, I need to look at the PID values ​​again.

By being so obsessed with it, you end up losing sight of the basic elements... thanks for putting this back on track...

I thought I was on the right track. I played with the PID coefficients all weekend, but nothing conclusive.
With an M19 R10, the spindle jams and eventually stops, but "orient.is-oriented" never goes to 1.
If I repeat an M19 R5, for example, nothing happens. If I repeat an M19 R30, the spindle ends up running at maximum speed.
In any case, it's rarely reproducible twice in a row.

I'm trying a new approach by removing the PID for orientation and replacing it with a near component.But it's worse; even the speed control isn't working anymore, nothing's moving...Where are my mistakes?
I started from a version with only one pid speed that works.
With errors like ./EL7-schaublin-28.hal:326: Signal 'spindle-at-speed' of type 'float' cannot add pin 'spindle.0.at-speed' of type 'bit'

 

I tried to merge my speed pid with a spindle orientation example from talla83
talla83.homepage.t-online.de/linuxcnc/20181124_Spindel_5i25.zip

Could not fully follow it, but it looks like you give speed to the analog output in the spindle speed case as it should be.
But you give position to the analog output in the spindle orient case - which is wrong, should always be speed.
Worthwhile checking anyway.

I am trying to learn how to set this up, so please do not take my comments as "expertise".

Have you checked the MUX2 select pin to see if it is switching when you  start the orient routine?
I would think that you should start with the same pid  parameters  that are used in the "Spindle PID Parameter" int the Orientation section, then work from there.

Ray