CCW dosen´t Work

Hello everyone,

First of all, many thanks to the forum and the many helpful contributions. Thanks to you, I almost got an old Emcotourn 340 working again.

I just can't get the spindle's CCW to work.

With CW the control gives me everything.

With CCW, the spindle brack signal comes briefly and then signals that the spindle has reached speed. But nothing turns.the other signals don't come on either.
 Maybe someone can tell me what's wrong in the ini or hal. Thank you very much and best regards Sebastian
 

Use the 'Halshow' tool and watch these signals when trying to run the spindle CCW:

net spindle-index-enable <=> pid.s.index-enable
net spindle-enable => pid.s.enable
net spindle-vel-cmd-rpm => pid.s.command
net spindle-fb-rpm-abs => pid.s.feedback
net spindle-output <= pid.s.output

Post a screenshot so we can have a look.

Without getting in to hardware diagnostics, first thing I'd try is editing the INI file.

Change [SPINDLE]:
To:[/code]

And see if that helps.  I assume you're using a 0-10v analog signal the the spindle motor VFD.  I suggest setting up a halshow watch list that includes all the spindle output signals/pins, including the output voltage to the VFD.

Aciera wrote:

Use the 'Halshow' tool and watch these signals when trying to run the spindle CCW:


Post a screenshot so we can have a look.
 

You seem to be about 10 seconds ahead of every response I type!

You seem to be about 10 seconds ahead of every response I type!

But your diagnostic seems more informed than mine.

The spindle analog settings are for a -10V to +10V controlled spindle
If you have a 0 to +10V controlled spindle you will need to replace

net spindle-vel-cmd-rpm => pid.s.command

with

net spindle-vel-cmd-rpm-abs => pid.s.command

and use a separate digital output to control the spindle direction

Hello everyone, with spumco's idea the ccw works. Only that the spindle accelerates to the maximum and ignores every S command.

As for the hardware, there is an old Contraves ADB/F converter installed for the spindle that needs +/- 10 volts. This is cams from The Mesa 7i83

I also noticed that my spindle at speed is only displayed when it is stationary.

However, the expected value for CCW now shows that the S500 only revs up to full speed.


Attached are pictures of standstill and M3 S500. M4 I don't dare take a screen shot because the spindle rotates at 6000 when cold

Thank you very much for such quick answers

The spindle PID settings are odd.

Normally you would start with:

P = 0
I = 0
D = 0
FF0 = 1
FF1 = 0
FF2 = 0
BIAS = 0
DEADBAND = 0
MAX_OUTPUT = 6000

== open loop

Once open loop is working and the feedback RPM is correct
Then it is appropriate to worry about  closing the loop (if that's even needed)

also
net spindle-vel-cmd-rpm => pid.s.command
is correct for a -10 to +10 controlled device

(I guessed wrong that you had a more common 0 to 10V controlled  VFD)
 

Mega M4 does almost what it's supposed to do,
still can't get the spindle at speed but the speed is just a little bit higher.

the problem was in the Hal, I deleted it.

I also changed the tuning as you suggested

This did the strange run up for CCW

---

# Use ACTUAL spindle speed from spindle encoder
# Spindle speed jumps back and forth, so we filter it with low pass
# Spindle speed is signed, so we use an absolute component to remove the sign
# ACTUAL speed is in RPS, not RPM, so we scale it.
setp scale.spindle.gain 60
setp lowpass.spindle.gain 1.000000
net spindle-vel-fb-rps => scale.spindle.in
net spindle-fb-rpm scale.spindle.out => abs.spindle.in
net spindle-fb-rpm-abs abs.spindle.out => lowpass.spindle.in
net spindle-fb-rpm-abs-filtered lowpass.spindle.out

---

 

All that scale x60 stuff has been obsolete for a long time
Since the -rpm velocity pin from the encoder was added:

hm2_7i95.0.encoder.02.velocity-rpm

The previous hal file without the scale stuff was much closer