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Hallo, Mesa bietet das 7i76eu als Ersatz für das normale an.
store.mesanet.com/index.php?route=produc...83_85&product_id=399

Kann ich es genauso verwenden wie das normale 7i76?

vielen Dank im Voraus

Thanks! I just want to prevent current through the spindle coils. I found parameters in the VFD to suppress low frequencies, so I think its solved. Thanks for your hints!
Hanno

An analog circuit with a 0V negative reference cannot swing all the way down to 0V
so the 45 mV 0 level is expected. Also linearity of the output should be better than 1%.

Normally the 0 level is not too important as the spindle enable should be false so the
drive is disabled at that point. If you want to improve the accuracy, you can use the
lincurve component, but note that spindle speed accuracy is not terribly important
for most applications.

Well, my tests yesterday showed tiny problems with the frequency. If I set the output to zero/stop, the voltage at TB4, Pin 2 Spindle Out is 0,045V and the VFD shows 1,56 Hz. The Input voltage at Pin 3 is 9,99V.
Next inaccuracy is frequency setting at S3000 ->50Hz, output is at 2,3V and 45,8 Hz instead of 2,5V and 50Hz.

What can I do to put Pin 2 to zero Volt? Is this a problem of the 7i76e/Lcnc or do I have to calibrate my VFD?

Thanks for your help, again!
Hanno

Für open loop kannst du den stepgen als position feedback verwenden. ZB:

That's been very successful! Thanks! MY spindle is turning! Just in the wrong direction but that's no problem. I can wire it up so that its CW. The next days I will check how to configure the pendant for spindle control. But today, Iam very happy that the spindle is turning!
Thanks a lot, PCW!
Hanno

net spindle.0.on => hm2_7i76e.0.7i76.0.0.spinena

should be

net spindle-enable => hm2_7i76e.0.7i76.0.0.spinena
 

Mon24 13:59: hm2/hm2_7i76e.0: Watchdog has bit! (set the .has-bit pin to False to resume)

Indicates relatively huge network latency (>5 ms if the watchdog setting is the default 5 ms)
That sounds like maybe a power management issue so you might try adding pcie_aspm=off
in your kernel command line.

What is the current kernel command line?
 (cat /proc/cmdline)



 

Ok, I tried your lines out and LCNC gives me this erroro out:
"twopass: Error in file ./Hanno_Nr5_Neuer_Versuch1.hal:
Signal name 'spindle.0.on' must not be the same as a pin. Did you omit the signal name?"

The actual lines in my .HAL:
# ---digital potentionmeter output signals/setup---

setp hm2_7i76e.0.7i76.0.0.spinout-minlim [SPINDLE_0]OUTPUT_MIN_LIMIT
setp hm2_7i76e.0.7i76.0.0.spinout-maxlim [SPINDLE_0]OUTPUT_MAX_LIMIT
setp hm2_7i76e.0.7i76.0.0.spinout-scalemax [SPINDLE_0]OUTPUT_SCALE
setp hm2_7i76e.0.7i76.0.0.spindir-invert true

#net pdnt.spindle-speed-abs => hm2_7i76e.0.7i76.0.0.spinout
#net pdnt.spindle.is-on => hm2_7i76e.0.7i76.0.0.spinena # raus wg Problemen

net spindle.0.on => hm2_7i76e.0.7i76.0.0.spinena
net spindle-cw => hm2_7i76e.0.7i76.0.0.spindir
net spindle-vel-cmd-rpm-abs <= spindle.0.speed-out-abs => hm2_7i76e.0.7i76.0.0.spinout

# ---setup spindle control signals---

#net spindle-vel-cmd-rps <= spindle.0.speed-out-rps
#net spindle-vel-cmd-rps-abs <= spindle.0.speed-out-rps-abs
#net spindle-vel-cmd-rpm <= spindle.0.speed-out # raus wg Problemen
net spindle-vel-cmd-rpm-abs <= spindle.0.speed-out-abs
net spindle-enable <= spindle.0.on
net spindle-cw <= spindle.0.forward
net spindle-ccw <= spindle.0.reverse
net spindle-at-speed => spindle.0.at-speed

# ---Setup spindle at speed signals---
sets spindle-at-speed true

Did I do sth wrong?

Greetings,
Hanno
        

Thanks.  The first issue is the output to control the spindle speed. I use a mesa 7i76e card with 0-10V as reference voltage on the spindle port TB4. The output won't go higher than +5V or for that matter, 50% of any reference voltage that I use.  The spindle also starts turning at 50% of the maximum spindle speed output setting when I use the slider in manual mode to control the spindle speed.  (The spindle only starts to run when the slider is in the middle.) The reason why I suspect that the issue is related to the qt_lathe gui is because when I do the exact same setup with pncconfig selecting AXIS as gui, the maximum output is the the same as the max+ reference voltage. 

The output is similar to "bipolar mode" as descibed in the 7i76e manual p15:as in the screenshot of the manual..     

I also noticed that the -5V to +5V (or 0-10V) output setting in the Spindle section of pncconfig for qtdragon has no influence on the output voltage of the spindle speed control. Whether the box is selected or not it makes no difference. 

My current goal is to get the lathe running with the correct axes and spindle control.  Once that is sorted I'll inform you of the other issues as I find them.

Remark:
The issue was resolved by changing the OUTPUT_SCALE parameter in the .ini file to a value of 1000.  As I read through the comments in the forum regarding the OUTPUT_SCALE value I realised that this is not an absolute value. 
 

Thank you very much! I will do that tomorrow (german time) and report the result!
Have a nice day!
Sincerely,
Hanno

Doesn't even look like the current hal file would run
as there are two different signals connected to
hm2_7i76e.0.7i76.0.0.spinout:

net pdnt.spindle-speed-abs => hm2_7i76e.0.7i76.0.0.spinout
#net spindle-vel-cmd-rps-abs => hm2_7i76e.0.7i76.0.0.spinout
net pdnt.spindle.is-on => hm2_7i76e.0.7i76.0.0.spinena
net spindle-cw => hm2_7i76e.0.7i76.0.0.spindir
net spindle-vel-cmd-rpm-abs <= spindle.0.speed-out-abs => hm2_7i76e.0.7i76.0.0.spinout

I would first get things running in the usual way by adding

net spindle.0.on => hm2_7i76e.0.7i76.0.0.spinena

commenting out

net pdnt.spindle.is-on => hm2_7i76e.0.7i76.0.0.spinena

and uncommenting:

#net spindle-enable             <=  spindle.0.on

When this is working I would look into the pendant spindle control options

Ok, I didnt realize this, because the Probe Basic GUI and the VFD switched the ENA/FWD Output if I give some MDI S command. I can see that in the GUi, my relai clicks, the VFD switches to Run. But the Pin says the truth...

I don't fully understand why this Enable command should come only from the XHC-WHB-04 pendant (set pdnt....) and not from the PB Gui - I would like to enable the spindle over the pendant but more in an OR funktion not only with the pendant.
I have to say that all these spindle commands weren't made by myself but from someone else who wanted to help me out in the past. And I couldn't test it in real life, because my VFD wasn't connected until now.

How should I change the settings so that it works with GUI and pendant? can you give me some hints, please?
Thanks for your support!
Hanno

The spindle is off:

bit FALSE pdnt.spindle.is-on ==> hm2_7i76e.0.7i76.0.0.spinena