7i77 "Software data process modes"
16 Sep 2014 03:01 #51203
by alan_3301
7i77 "Software data process modes" was created by alan_3301
Hi, I am interested in using mode 1 to have torque analog input from my servos drives.
The idea is to have a visual meter for servo load.
I haven't really researched how to implement this yet, but It got me wondering.
What is the purpose of mode 2 which includes "field analog voltage" in?
And, is there any reason to not run mode 3 for all situations, except that you lose the digital inputs 0-3 and 16-19?
I may have MPG's in the future, so I want to leave that option open.
Thanks.
The idea is to have a visual meter for servo load.
I haven't really researched how to implement this yet, but It got me wondering.
What is the purpose of mode 2 which includes "field analog voltage" in?
And, is there any reason to not run mode 3 for all situations, except that you lose the digital inputs 0-3 and 16-19?
I may have MPG's in the future, so I want to leave that option open.
Thanks.
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- Zahnrad Kopf
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16 Sep 2014 05:51 #51211
by Zahnrad Kopf
Replied by Zahnrad Kopf on topic 7i77 "Software data process modes"
Is that how it works, or are those meters just measurements of Amperage Load? I always thought the latter....
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16 Sep 2014 06:22 #51215
by alan_3301
Replied by alan_3301 on topic 7i77 "Software data process modes"
I think the torque and amperage are directly proportional. (not sure)
I was going for a display on the linuxcnc screen with pyvcp, I would guess the physical meters are just ammeters.
I was going for a display on the linuxcnc screen with pyvcp, I would guess the physical meters are just ammeters.
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16 Sep 2014 07:42 #51218
by PCW
Replied by PCW on topic 7i77 "Software data process modes"
There's no reason not to run mode 3 always if you are not pushing the
maximum update rates (there's a time overhead for every data item transferred )
For normal 1KHz servo loops this is a non-issue
if you want a 4 or more KHz servo thread it may start to matter
you dont lose the digital inputs in any mode (well unless you connect analog inputs or MPGs)
maximum update rates (there's a time overhead for every data item transferred )
For normal 1KHz servo loops this is a non-issue
if you want a 4 or more KHz servo thread it may start to matter
you dont lose the digital inputs in any mode (well unless you connect analog inputs or MPGs)
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16 Sep 2014 08:30 #51221
by alan_3301
Replied by alan_3301 on topic 7i77 "Software data process modes"
Thanks.
Do I need to worry about what "field analog voltage" input is for?
I'm guessing no, but was just curious.
Do I need to worry about what "field analog voltage" input is for?
I'm guessing no, but was just curious.
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16 Sep 2014 09:29 #51223
by PCW
Replied by PCW on topic 7i77 "Software data process modes"
thats just the field voltage so if you have 24V field voltage you would expect to read 24V there
(and if its dropped to 18V or you have a lot of ripple, you can tell)
(and if its dropped to 18V or you have a lot of ripple, you can tell)
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