Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

compumotor interface

compumotor interface

compumotor interface

Looking for assistance on a small project.  Using a Compumotor GV-3LE for simple motion, need to change only the velocity remotely for fine tuning.  The motor turns a product 2 revolutions and stops in the same place every time, working as a pre-register. Any suggestions other than a costly Parker screen to do this?  Is there a way to use a matrix on say four inputs and use a thumbwheel to select 16 possible settings?  If so , how?
Thanks for any suggestions.


RE: compumotor interface

Do you need so much precision ? for a simple project
wouldn't a 200-400 step/rev stepper OK?


RE: compumotor interface

I agree, this is on an existing machine they want to run a different product on. We just need to control that one variable, it is turning a glass jar and doesn't much like it when it goes too fast.

RE: compumotor interface

I know that some of the older Compumotor drives had a thumbwheel input.  You would have to specify three input lines as (I think it was...) octal, and you would specify an additional line as the go command.  Do specify an additional line as an E-stop, while you're at it.

And double-check me for the number format for the thumbwheel input--and check the formatting on the thumbwheel itself, as there are diferent styles available (Allied Electronics, Digi-Key are possible sources)

I ran part of Disney's Beauty and the Beast on a system like that.  Only had to hook the laptop up for the occasional reprogramming & troubleshooting.  Oh, and we weren't moving jars.  We were moving people.

RE: compumotor interface

What about using a PC or laptop to interface using Parker's software?  Maybe you could then make a simple HMI application using VB to control only what you would want changed.

If I remember the software is not too complicated and runs in Windows or Dos.

...Just an idea


RE: compumotor interface

Thanks, all.  I think the pc would work, but this is a real nut and bolt operation, could be too confusing.  The Parker does have BCD inputs, so if I looked a little further I would have answered my own question.
Thanks again

RE: compumotor interface

I have done exactly what you are talking about. in my application I control a stepper motor in a web feeding application. I am however controlling the distance that the stepper pulls with each index signal. I would be happy to help you with your application. I do not however, work for free!

best regards, PLCSAVVY

RE: compumotor interface

I did get this to work after some confusion.  Seems the GV6 has a limited number of commands, compared to the larger units.  I used i/o to thumbwheels, but discovered the VAR value I was using to control the velocity is a real number, this control only supports integer variables.  After some IF..NIF statements to define the input, I was using "VAR=3.2" as the variable, translates to V3.2 as velocity.  This control needs to see "VARI=32000" as the integer, and scales the actual V command with its' resolution, ending up with the proper "V3.2" as velocity.
Thanks for your offer anyway.

RE: compumotor interface

Look at Maple Systems little OIT's. They are very reasonable $.


Cameron Anderson - Sales & Applications Engineer
Aerotech, Inc. - www.aerotech.com

"Dedicated to the Science of Motion"

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close