Where can I get this motor controller designed?

[enzo2015]

Hi, can someone direct me to where I can go to get a system like this designed:

I have a small pump run with I guess brushless dc motor with encoder(for volumetric measurement), and another feedback point of a pressure transducer(pressure). What I need the system to do is:

First , if the operator pressed a start button, then by manipulating a potentiometer was able to change the speed of the motor, thereby changing the pressure on the system.

If you were to put it on a graph, it would start low, go higher, maybe level off, then drop back to a lower pressure. The maximum time these cycles would take is 1 minute

After manually manipulating this, the controller could remember the pressure curve. The user would press the start button, and the controller would run the last pressure curve exactly automatically. Maybe a system that could store in memory multiple pressure curves, and be recalled from a saved list.

Could this be done with available software, maybe Labview, or would it be better to program this from scratch? Thanks for your time

 

[itsmoked]

Is this a one-off or a product? The Labview comment makes it sound like a one-off.

Sounds like a dosing system. Have you searched around checking dosing systems?

Keith Cress
kcress -

http://www.flaminsystems.com

 

[enzo2015]

Not a one off system, Labview was just a guess. This system will be replicated if it works well. Just for pumping water, just don't know where to go to get it designed

 

[itsmoked]

We can't directly solicit in here nor can you. However any competent controls EE in this forum could probably help you and offer some creative options too. You just have to figure out how to contact them directly..

Keith Cress
kcress -

http://www.flaminsystems.com

 

[Skogsgurra]

Wouldn't be too difficult for enzo to figure one out. Would it?

Gunnar Englund

http://www.gke.org

--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

 

[jraef]

Enzo,
Is there some specific reason why you want DC? Most small AC drives have similar functionality built-in now. They have embedded PID loop control capability that will take your input setpoint, compare it to a feedback signal from a pressure transducer, calculate the error (the difference between the setpoint and the feedback) and control the drive speed to attain and then maintain the desired pressure with little overshoot or hunting oscillation. First you need to define your problem a little better, i.e. power requirements, pressure range etc., then look for someone with experience in drive integration to help you pick an appropriate off-the-shelf product. This is a very simple task for an experienced integrator.

If you don't know any, there are a few who post and read this forum, some of whom put their website addresses in their signature lines... (hint hint )


"If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln
For the best use of Eng-Tips, please click here -> faq731-376

 

[enzo2015]

Thanks for all the help, I'll define it more and get in touch

 

[blacksea]

All the above operations maybe performed with single-axis programmed motion controller with build-in servo amplifier -see for example digital products from Elmo (

http://www.elmomc.com).

These products have enough digital and analog I/O's for your application.

 

[PNachtwey]

I would use this

http://www.deltamotion.com/products/motion/rmc70/index.php

RMC75E-QA1-AP2-D8
It will do exactly what you want and not cost too much. The QA1 part does the velocity/volume rate control. One channel on the AP2 is for pressure feedback and the other channels is for the joy stick reference. The D8 is for digital I/O. The analog reference can generate the pressure profile and the controller can save this data away as a pressure curve or pressure cam table. Is one point a second good enough? On play back the pressure curve points can be interpolated using 3rd order interpolation so the transition between the points will be smooth. If you only need to save 1 point per second then you should be able to save about 16 of these curves within the controller.
The controller is designed to do position/pressure testing applications. It can also interface easily with other applications like, Excel, VB, C#, LabView or any other data analysis software that can use a activex control or ,net assembly.

The controller has setup software that can plot 16 channels data real time over Ethernet. The interpolation, Ethernet, pressure control, speed/volume control are all built in.

I am not soliciting. I am providing a good solution..

Peter Nachtwey
Delta Computer Systems.

Delta Computer Systems

http://www.deltamotion.com

 

[jraef]

Methinks applying a motion controller to a pump is serious overkill...


"If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln
For the best use of Eng-Tips, please click here -> faq731-376

 

[PNachtwey]

"Methinks applying a motion controller to a pump is serious overkill... "
Perhaps, but that isn't the point. My solution will EASILY do what Enzo asks. It is a time vs money issue. How much time would it take Enzo recreate the wheel and roll his own and it would never be as good as something designed for this unless he spends A LOT of time on it and he can spread that extra cost over many machines.


Delta Computer Systems

http://www.deltamotion.com