Joging Shows movement in axis but no voltage
- JB-Motoring
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23 Jun 2019 16:53 #137660
by JB-Motoring
Joging Shows movement in axis but no voltage was created by JB-Motoring
Hey everyone
I have a problem with my build.
I am using a 7i77 to drive my analog +-10v servos.
PID works, so for the first few Tests, the servos are reacting to modifications.
NOW if i press a jog Button, no matter which one, in axis it shows me movement, but the servos are stillstanding, so no voltage is generated.
The spindle runs fine just like it should.
I think it is a hal or ini mistake?
Thanks to All
I have a problem with my build.
I am using a 7i77 to drive my analog +-10v servos.
PID works, so for the first few Tests, the servos are reacting to modifications.
NOW if i press a jog Button, no matter which one, in axis it shows me movement, but the servos are stillstanding, so no voltage is generated.
The spindle runs fine just like it should.
I think it is a hal or ini mistake?
Thanks to All
![:-) :-)](/media/kunena/emoticons/smile.png)
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23 Jun 2019 17:16 #137661
by PCW
Replied by PCW on topic Joging Shows movement in axis but no voltage
Have you gone through basic velocity mode analog servo setup?
gnipsel.com/linuxcnc/tuning/servo.html
gnipsel.com/linuxcnc/tuning/servo.html
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- JB-Motoring
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23 Jun 2019 21:40 - 23 Jun 2019 21:41 #137676
by JB-Motoring
Replied by JB-Motoring on topic Joging Shows movement in axis but no voltage
Thank you very much
After reading it for the fifth time i finally found the missing parts- IT WORKS!
NOW another questions about the homing sequence.
The machine originally uses a nc switch for homing that rides over a Part shaped like that /----\
So it is first closed, then opens for about 15mm and then closed again for the home Signal.
Is there a possibility to realise that with Linux?
Maybe with an example how to programme it?
Thank you again, i really appreciate that!
After reading it for the fifth time i finally found the missing parts- IT WORKS!
NOW another questions about the homing sequence.
The machine originally uses a nc switch for homing that rides over a Part shaped like that /----\
So it is first closed, then opens for about 15mm and then closed again for the home Signal.
Is there a possibility to realise that with Linux?
Maybe with an example how to programme it?
Thank you again, i really appreciate that!
Last edit: 23 Jun 2019 21:41 by JB-Motoring.
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24 Jun 2019 01:29 #137688
by PCW
Replied by PCW on topic Joging Shows movement in axis but no voltage
Seems like that kind of a home sensor would not work if you didn't know what side
of the cam you were on at startup ( unless there were additional limit switches )
of the cam you were on at startup ( unless there were additional limit switches )
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24 Jun 2019 07:00 #137709
by pl7i92
Replied by pl7i92 on topic Joging Shows movement in axis but no voltage
you better take them off the mashine and use standard comen modern switches
you can have 3 switches per axis
so min max and ref
where ref will be the same as min or max or as you got a big mashine i woudt setup ref to a 10-15mm within workarea min max
with the Induktive LJ12A3 series as a NPN (BX) witv NO
you can have all 9 switches places in one pin
but you got so many pins on your mesa that you dont need this
you can have 3 switches per axis
so min max and ref
where ref will be the same as min or max or as you got a big mashine i woudt setup ref to a 10-15mm within workarea min max
with the Induktive LJ12A3 series as a NPN (BX) witv NO
you can have all 9 switches places in one pin
but you got so many pins on your mesa that you dont need this
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24 Jun 2019 10:54 #137723
by JB-Motoring
Replied by JB-Motoring on topic Joging Shows movement in axis but no voltage
Thank you two for the answers ![:) :)](/media/kunena/emoticons/smile.png)
I would like to let the machine switches like they were oem- because if I will sale the machine one day, i would fit the oem Siemens control back again.
So the most common way that I see is, to share limit+home in one switch.
BUT my problem is, that the limit switches are connected to the emergency control of the machine- hardware oem based.
So that wont work, because the machine would detect an emergency signal everytime it hits the limit+home switch- that causes the drives to shut down.
NOW the REF switches is mounted about 50 mm away from the limit switch. Is there a possibility to say if it hits the REF switch, that this is actual not 0 XYZ but like XYZ 35 or 40mm ?
Thank you all for the help
![:) :)](/media/kunena/emoticons/smile.png)
I would like to let the machine switches like they were oem- because if I will sale the machine one day, i would fit the oem Siemens control back again.
So the most common way that I see is, to share limit+home in one switch.
BUT my problem is, that the limit switches are connected to the emergency control of the machine- hardware oem based.
So that wont work, because the machine would detect an emergency signal everytime it hits the limit+home switch- that causes the drives to shut down.
NOW the REF switches is mounted about 50 mm away from the limit switch. Is there a possibility to say if it hits the REF switch, that this is actual not 0 XYZ but like XYZ 35 or 40mm ?
Thank you all for the help
![:) :)](/media/kunena/emoticons/smile.png)
![:) :)](/media/kunena/emoticons/smile.png)
![:) :)](/media/kunena/emoticons/smile.png)
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24 Jun 2019 11:55 - 24 Jun 2019 11:56 #137725
by rodw
Replied by rodw on topic Joging Shows movement in axis but no voltage
Yes, if you read the docs, there is a HOME_OFFSET in the ini file that takes up that space between the home switch ant he limit switch but the real problem will be the home switch needs to be kept active during this period. It would be so much easier if you could fill in the space between the end of the ramp and the limit switch so your machine follows the Linuxcnc Paradigm instead of you trying to force the behaviour you want out of Linuxcnc.
EDIT: Separate home and limit switch are much nicer than shared ones
EDIT: Separate home and limit switch are much nicer than shared ones
![:) :)](/media/kunena/emoticons/smile.png)
Last edit: 24 Jun 2019 11:56 by rodw.
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