Stepper motor plc Driven

[RBE]

Hi

Im trying to control a multi turn valve/pressure reg
I wondered if it were possible to use a stepper motor driven directly from a plc via relays if nessary
the idea being I could program the plc to deliver the correct no of pulses for the required pressure output of the valve
can a stepper motor be driven this way ?

 

[djs]

Hello;
Many PLC's have special modules for controlling stepper motors. These are similiar to high speed counter modules, but instead of counting pulses, they produce pulses. In general the frequency of the output pulses would be too high to use ordinary outputs.

 

[RBE]

Hi djs

can you reccomend any specific make of plc
also as Im only contolling a valve speed is not a requirement.

 

[Foxfur]

Here is a link that may help:

http://www.ontrak.net/step.htm

Another one:

http://www.motiongroup.com/md.htm

Here's one more (your best bet from my experience):

http://support.automationdirect.com/technotes.html

Look at the appnote (PDF format) on their D2-CTRINT ($73.00) module. It is used with their DL205 PLC's (from $119-$250 depending on how much program memory you need). I've used their 05 series with much satisfaction in automating semiconductor research equipment.

The DL205 Series is shown at:

http://www2.automationdirect.com/store/Shopping/Catalog/PLC_Hardware/DirectLogic_205

I hope this can help,
Foxfur

 

[jbartos]

Suggestion: Some motor operating valves are using special motors that have very high starting torque (MEMA Design D or better). This is supposed to ease the valve obstructed by sediments to open or fully close. However, the stepper motor might be suitable for some valve applications in which valves close frequently and without any obstacles.

 

[SERVOCAM]

Like what was said above, yes you can control steppers via a PLC sending pulses. I have done this in many applications.

I suggest looking at:
1. GE Fanuc's VersaMax Micro & Nano's,

http://www.gefanuc.com

2. Horner Electric's OCS,

http://www.heapg.com

Remember, you will need a stepper drive. I suggest looking at:
1. Superior Electric,

http://www.slosyn.com

2. IDC,

http://www.idcmotion.com

3. GE Fanuc has some as well,

http://www.gefanuc.com

4...Pac-Sci, Oriental, IMS, Gecko, AMCI....

If you want to go servo, Exlar Corp makes a drive for the Process world that accepts a 4-20ma or 0-10V analog for valve control.
Cameron Anderson - Sales & Applications Engineer
Aerotech, Inc. -

http://www.aerotech.com

"Dedicated to the Science of Motion"