Glasmaßstab EIA-422 an Mesa 7i85 (S)

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1 year 1 month ago #335030 by PCW
When, you say  "unfortunately the result is the same" , it would be helpful if you
specified the actual results as there have been at least three separate issues discussed here.

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1 year 1 month ago - 1 year 1 month ago #335032 by tommylight
Your picture here
forum.linuxcnc.org/42-deutsch/56803-glas...85-s?start=10#334968
shows several warnings about permissions, it is not just index, so if you are running as root user, switch over or reinstall as LinuxCNC will vigorously refuse to run properly as root, as will most of the Linux "user space" software.
Also, are you using a parallel port? Why does it say that in the error report?
Last edit: 1 year 1 month ago by tommylight.

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1 year 1 month ago #335040 by WKS-3D
@PCW
I actually only talked about one problem, or rather, for me it was only one problem, namely that no setting leads to the index signal being recognized or responded to.
I tried changing the jumper settings to TTL signal to see if that would trigger a response, but unfortunately that wasn't the case.
For example, I went through all possible combinations from 000 to 111 to see if anything changed:

setp    hm2_7i92.0.encoder.00.index-invert 0
setp    hm2_7i92.0.encoder.00.index-mask 0
setp    hm2_7i92.0.encoder.00.index-mask-invert 0

No difference was noticeable with either the RS-422 or the TTL signal.

@tommylight
That's right, I'm not logged in as root; I just checked again, but you shouldn't do that under Linux anyway. Anyone working on the machine could destroy the entire system. Besides, everything is running smoothly except for the problem with the index, and it's not due to permissions.
I don't use a parallel port; a 7i92t + 7i76 + 7i85 is built in.

However, I have since discovered that there are often problems with the DC11 GMS and the index signal; it is either very weak or not output at all.
I probably have two such units. But since I don't want to waste any more time on this problem, I'll leave it alone and work with it as it is now.
Thank you very much for your support, and I'm glad this forum exists.

Greetings
Olli

 

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1 year 1 month ago - 1 year 1 month ago #335367 by Ul
Ist ein Oszilloskop vorhanden? Falls ja, einfach ans Glasmaßstab anschließen, auf single shot stellen, Triggerspannung einstellen und die Achse joggen.
Ansonsten kannst du probieren mit dem Signal einen MOSFET und damit eine LED zu schalten (mit Diode in Serie am Gate, damit er auch geschaltet bleibt). Wenn bekannt ist, wo das Signal ist, kann man die Stelle anfahren und die genaue Spannung mit dem Multimeter messen. 
Last edit: 1 year 1 month ago by Ul.

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1 year 1 month ago #335480 by WKS-3D

Ist ein Oszilloskop vorhanden? Falls ja, einfach ans Glasmaßstab anschließen, auf single shot stellen, Triggerspannung einstellen und die Achse joggen.
Ansonsten kannst du probieren mit dem Signal einen MOSFET und damit eine LED zu schalten (mit Diode in Serie am Gate, damit er auch geschaltet bleibt). Wenn bekannt ist, wo das Signal ist, kann man die Stelle anfahren und die genaue Spannung mit dem Multimeter messen. 


 
Nein, ich habe leider kein Oszilloskop und selbst wenn, es würde ja nichts ändern, wenn das Oszi ein schwaches Signal erkennt, aber LinuxCNC nichts damit anfangen kann weil es einfach zu schwach ist.
Ich habe mir einfach die falschen GMS ausgesucht, hätte ich da vorher danach recherchiert, dann hätte ich wohl andere genommen.

Es ist wie es ist und es bleibt auch so :)

Danke für den Tipp

Gruß
Olli

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1 year 1 month ago #335492 by Ul
Alles klar

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