In the forum I had a user ask about servo setting in PNCconf and realized
I didn't have good answers. Peter answered the fellows question but I am
digging into the question so I can better understand things and maybe
improve the docs a bit.
In the manual under the TRAJ heading it talks of servo related settings.
In particular output_scale and output_offset.
Now it uses some very technical wording and is quite tough to understand IMHO.
First off unless I am missing something, if some one is using HOSTMOT2 PWM
there is no setting output_offset. software PWMgen has offset. Is that correct?
In which case the manual should state that offset will be used only if
available.
now PID Bias could do the same thing couldn't it?
Second scaling: If I understood Peter the scaling could be set to really any
unit
you want as long as the PID max output is set properly too.
In Peter's opinion setting scaling to 1 (which would be PWM duty cycle) would
make sense (particularly if using H-bridge amplifiers) .
but setting the scale to represent voltage or motor speed would be reasonable
too?
for instance if one was using +-10 volt amps, and one wanted output to be in
volts
one would set output_scaling to 10 and PID max output to 10. yes?
or if using an 7i29 H-bridge scale could be 1 and PID max output might be .975
(this was as per Peter ) because H-bridges can not be fully on.
In PNCconf the default setting for output scale is 1 and PID max output is 10
which I'm pretty so is totally wrong.
Thanks for helping me clear this up.
Chris M
------------------------------------------------------------------------------
All of the data generated in your IT infrastructure is seriously valuable.
Why? It contains a definitive record of application performance, security
threats, fraudulent activity, and more. Splunk takes this data and makes
sense of it. IT sense. And common sense.
http://p.sf.net/sfu/splunk-d2dcopy2
_______________________________________________
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers
