Experimental Physics and
Industrial Control System

The existing driver does support the 8743 closed-loop picomotor controller.  However, it does not support closed-loop mode.

 

It looks like it should be easy to implement.

 

You need to add this function:

 

asynStatus nf874xAxis::setClosedLoop(bool closedLoop)

{

  asynStatus status;

 sprintf(pC_->outString_, "%s MM %d", axisName_, closedLoop ? 0 : 1);

  status = pC_->writeController();

  return status;

}

You might also want to add controller-specific parameters to control these:

CL Closed loop update interval

DB Deadband

FE Following error

 

These would be implemented in the writeInt32 and writeFloat64 methods.

 

Mark

 

 

 

 

From: [email protected] [mailto:[email protected]] On Behalf Of Jemian, Pete R.

Sent: Thursday, May 12, 2016 3:32 PM

To: Siddons, David P.; EPICS

Subject: RE: Model 8743 Closed-Loop Picomotor,Controller / Driver

 

https://github.com/epics-modules/motor/blob/master/motorApp/NewFocusSrc/874xMotorDriver.cpp

 

Looks like that is a TODO item

 

 

Sent via the Samsung Galaxy Note® 4, an AT&T 4G LTE smartphone

 

 

-------- Original message --------

From: D Peter Siddons <[email protected]>

Date: 5/12/2016 4:28 PM (GMT-05:00)

To: EPICS <[email protected]>

Subject: Model 8743 Closed-Loop Picomotor,Controller / Driver

Hi Tech talkers,

    Does the motor record support the 8743 closed-loop Picomotor controller?

Pete.

 

--

D. Peter Siddons

Detector Development Group Leader

Bldg. 535B

Photon Sciences Directorate,

Brookhaven National Laboratory

Upton, NY 11973

 

email: [email protected]

Phone: (631) 344-2738