Is there a NI controller board that can control a 5-phase stepper motor?

[Intern2005]

Hello Jochen,


1. I checked the incremental encoder connected to the adapter (Heidehain >EXE 610B). This adapter delivers a quadrature encoder type signal: two 90° (switched S2 closed: Ua0 in standard width (90°el.)) phase shifted square signals (TTL compatible). This adapter is connected to the encoder, and in the other side there is a connection cable (cable 12-pole): 2 wires are connected in a customised box "5V", 6 wires are not used, the 4 last wires are joined into a cable to be connected into an old 5 channel counter/totalizer (HP 44715A, 200kHz) in the data logger.

2. The 5-Phase stepper motor 1-axis RDM511 22/50 is connected to a device SDO 5-6400 with a signal voltage 20...30V (24V), which include an oscillator card D638 (to steer the start-stop frequency, driving frequency, ramps of accelerations and delays, additionally, tension frequency converters), and a steering card D650.00 (phase stream 2…5A, by Boost to 6A).

3. Basically, the test equipment is running with an old HP program. The program asks the user to give a length of displacement for the axis (usually 20 mm). And there's a quartz force transducer that measures the friction force (or tangential force).

The LIDA measures the displacement as well. I have not designed yet the upgraded program but I think I could use it actually as a feedback device for closed loop operation. So I'd like to do with LabView a position based measurements.
Now, I still don't know if I must measure the length number of lost steps of the motor or if I must measure the slip of any other mechanical part? What do you think is the best solution, or the most common way to proceed?

Thanks

[Jochen]

Sorry but as I still don't have a good idea what exactly you want to do I can't give you good advice how to solve your application. I'm missing the "big picture" of your application and the information I've got from you leaves too much room for assumptions.

Maybe the forum is not the adequate communication process for the type of consultancy you are obviously looking for. I think it would be much better if you talked to someone directly either face to face or on the phone (e. g. call the NI support of your local branch).

Best regards,

Jochen Klier
National Instruments Germany

[Intern2005]

Hello,

I finally checked again the 5-phases stepper motor, and I saw that just an analog output from PC (voltage) controls the stepper motor though an oscillator card: an input voltage causes in output a frequency proportional to the input voltage.
It looks quite simple. And appearently, I would not need any motion controller or motion control card.
I think that the polarity voltage input causes the direction, and the height of the voltage causes the speed.

Moreover I would like to build a motion control loop based measurement thanks to an incremental linear encoder for the feedback. I checked but most of the VIs poposed deal with NI motion control board and I don't get the subVIs from libraries.

So could someone please help me on how to find a VI for building my motion system that could permit me to do :
- One axis simple move (an analog triggered motion)
- One axis find home using the find reference functions
- One axis move with Position Monitor (incremental encoder as feedback)

Thanks in advance for your help

[Scott_R]

Hello,

What type of interface will you be using with your drive? If you are not going to be using an NI motion controller, are you going to be using one of our data acquisition (DAQ) boards? If you are using one of our M-series devices, you can make use of our SoftMotion software to develop your own control algorithm for the motor. This software will make use of the counters to read the encoder pulses and the analog channels if you are controlling a servo motor or the digital I/O if you are using a stepper. For additional information about SoftMotion, take a look at the following resource:

What is SoftMotion?
http://digital.ni.com/public.nsf/websearch/6241D1ABF63869D186256F1C007D9A5E?OpenDocument

NI SoftMotion: Create Your Custom Motion Controller on Any Platform with LabVIEW
http://zone.ni.com/devzone/conceptd.nsf/webmain/b1817ab5751b602e86256f0000535887

Look at those and let me know if you have any additional questions.

Regards,
Scott R.
Applications Engineer
National Instruments