Greetings all; What all do I have to setp to 0.000 in order to reduce the PID module to a strait line math function with no non-linearities from feedback?
With my limited understanding I'm assuming the with FF0=100, and all the other trimmers setp'd to 0.0000, that it should have a straight thru transfer function, ignoring any feedback from the encoder velocity pin. However, with the motor driver disconnected so there is no input from the encoder, the output voltage steps at the C41 output aren't truly linear either. I can trim the pwmgen offset to get say 10 rpm for an s10, 120 rpm for an s120, and about 355 rpm for an s360, while an s480 gets about 440, but s600 gets around 650, s700 gives 800 & change, s900 gives about 1150, etc up to pushing the motor a bit past its limits with an s1000 pinning the pyvcp tach at 1200. I am beginning to get the impression this controller might need a buildout resistor in the control voltage wire. Has anyone got a better idea on how to identify the src of the non- linearity? The shop needs AC today, thats for sure. 80+, muggy as all get out. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> Are the STEWED PRUNES still in the HAIR DRYER? A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ How ServiceNow helps IT people transform IT departments: 1. A cloud service to automate IT design, transition and operations 2. Dashboards that offer high-level views of enterprise services 3. A single system of record for all IT processes http://p.sf.net/sfu/servicenow-d2d-j _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
