On 19/02/2020 00:44, Peter C. Wallace wrote:
On Wed, 19 Feb 2020, Ed W wrote:
OK, well that's encouraging! Running through pncconf the pin is high
+5v, until I click into the motor tuning when it drops to close to 0V
(I read about 20mv)
OK, so how do I debug why I don't see any steps coming out..? Hmm. I
am really unsure what I should be doing here...
Final state is intended to have a cheap bob with step/dir to the
chinese cheapo clone drivers that came with the omio x6-2200. (I'm
not welded to the bob, just had it and it has convenient connectors
in place). There are no encoders, just a simple stepper driver and
steppers.
I should show you the settings I have, but the machine isn't
conveniently close at present... The settings are on whatever
defaults pncconf gave. From memory P is set to 1000 (not sure what
the PID settings do with a stepper?), I have no encoders and then I
have the stepper set to 5,000 and 10,000 in the various stepper
timing boxes.
If I click "run" or try and jog in the tuning screen then I see the
position params appear to change. However, I wonder if the issue
could be that something here thinks I have a servo and without an
encoder it isn't going to move and send some steps? Should this
screen be showing me values which look like servo config?? Have I
made some error in previous screens?
Thanks for such a fast response - appreciated. Further ideas would be
very gratefully received!
Ed W
Its hard to guess the issue. do you have a working LinuxCNC
configuration?
Do the direction pins change whan you jog in different directions?
( The PID is used to manage the step generation hardware and there is
no reason to change the default tuning )
It might be more useful to ask for assistance on the LinuxCNC forum
where you
can post your hal/ini files
I think I can get it back to working state. I was trying to just use
pncconf in order to keep it to the basics for now? I need to double
check to confirm, but I think the direction pin stays low?
Are there any commands or utilities to simply strobe pins on the 6i25
connector and read their state? This would give me some satisfaction
that things are working. I think this is probably a 101 question, so
please refer me to the docs, but I guess I'm hoping for something that
will simply show me current hardware input/output states? I would like
to pull pins low to check some of the switch inputs while I'm going
Thanks
Ed W
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