Experimental Physics and
Industrial Control System

Kevin Tsubota <[email protected]> · Tue, 21 Oct 2003 07:37:41 -1000

We're using renishaw encoders driven with Delta Tau Turbo PMACS which can
handle up to 16channels.  It does however require a seperate amplifier
crate, which we're using Western Servo.  

Our EE, Andy Rudeen, [email protected], can give you more detailed
information if interested.

Kevin Tsubota
W.M. Keck Observatory

-----Original Message-----
From: David Maden [mailto:[email protected]]
Sent: Monday, October 20, 2003 9:02 PM
To: [email protected]
Subject: Re: Encoders

Robert,

Another couple of alternatives are the SSI550 (for up to 16 encoders) or 
the ECM504 (for up to 4 encoders), both from Kramert GmbH. The SSI550 
requires an extra rack for interfacing to the encoder signals whereas the 
ECM504 has everything you need packaged into the VME board. See

    www.sls.psi.ch/controls/hardware/

for links to data sheets for these modules in pdf format. There is a simple 
EPICS driver ... much more lightweight than handling any sort of RS232 
protocol.

If you decide later to run your motors with encoder feedback, it's simply a 
case of setting up the RDBL field of the motor record.

David Maden
SLS Beamline Controls

Kurt A. Goetze wrote:
> Robert,
> 
> If you are running synApps, OMS boards, and the "APS standard" motor
> connection hardware, then the easiest way to read your encoder into EPICS
> is to use the OMS VME58-4E card.  You also could use something like this
> http://www.usdigital.com/products/ad4b/
> and read the encoder counts with an EPICS generic serial record.
> 
> Kurt Goetze
> APS/AOD/Beamline Controls
> 
> 
> Robert Henning wrote:
> 
> 
>>I am trying to integrate some Renishaw encoders into EPICS and I am
>>trying to find a simple solution.  I don't have a lot of experience with
>>encoders so any comments or suggestions would be welcome.  At this point
>>I only want to use the encoders to verify my stepper motor position and
>>I was hoping for a simple RS232 interface.  I know this has been done
>>with other brands of encoders but I have not seen anything with the
>>Renishaw brand.  The encoders have "Differential signals in quadrature
>>to RS422 - output via line drivers".
>>
>>I know I could use the OMS58-4 card but I think that is more then I
>>need.  I just want to be able to read in the information to EPICS for
>>now.
>>
>>Thanks in advance,
>>
>>Robert Henning
>>Operations Manager/Beamline Scientist/User Support Specialist
>>University of Chicago at Argonne
>>9700 South Cass Avenue
>>BioCARS - Building 434 B
>>Argonne, IL 60439
>>phone: (630) 252-0446
>>fax:   (630) 252-0443

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System