Connecting purchased motor w/ LabView Motion Control

[mlapointe]

Hi all,

I have an existing motor and LabView hardware that I am trying to connect together for position and velocity control. The motor is an Anaheim Automation BLY344D (spec sheet attached). I have a both a PXI-3744 and PXI-7358 motion controllers, and a UMI-7774 motion interface available. My plan was also to purchase an encoder from Anaheim Automation to mount onto the motor (a 720DI, see spec).

Now for the connectivity part. I was planning on using the PXI-3744 because I only have 1 motor and do not need high performance. Doing some research I found a driver from Anaheim Automation (MDC151-050301 w/ an appropriate DC power supply) that is sufficient to power the motor, and provides velocity control with a 0-5 VDC input. Would it be relatively straight forward to wire this driver to the UMI? I know the NI controller uses a +-10V output, so I would image it could be tailored to output in the 0-5V range. Also, would the encoder require a seperate power supply or can the NI controller provide power? 

I have little experience working with the hardware side of things so any help or suggestions would be greatly appreciated.  

Thanks,

Matt

Links:

PXI-7344

UMI-7774 

MDC151-050301

[Jochen]

Matt,

the drive, that you have selected is not a good choice for operating with an NI-73xx motion controller. The reason is the fact, that it doesn't provide true bidirectional control. Typically drives support +/- 10 V or +/-5 V inputs and the connected motor moves forward at positive voltages and reverse at negative voltages. The MDC151-050301 provides only an unidirectional voltage input (0 - 5 V) and it requires an additional digital signal to switch the direction of the motor's rotation. There is no reasonable way to make this work with a 73xx. You could limit the analog output of your board to +/- 5 V, but even if you only want to turn the motor in one direction, the control algorithm on the 73xx still uses the full bidirectional range of the analog output. As this doesn't fit to the drive's input range, it could become quite hard to tune the system.

Not the 73xx but the UMI-7774 provides power for your encoders, so no additional power supply is required.

I hope that helps,

Jochen

[mlapointe]

Would there be a way around this, like building a circuit that would switch the direction on the driver if the voltage is negative, and then send a positive voltage?  I tired looking around for another driver that would work this motor and the NI hardware, any suggestions?

Thanks!

[Brian_Beal]

Are you trying to do positioning with this setup, or just velocity control?

[Jochen]

Building the suggested circuitry doesn't sound like an easy task. You easily might end up with a lot of working hours and a poor solution. The control input of your drive is really everything else but standard, so using another type of drive is probably a better choice. I have worked several times with Kollmorgen ServoStar drives that are now distributed by Danahermotion. This might be an interesting option for you.

Still Brian's question is very legitimate. If you plan to do only velocity control, using your current equipment might be feasible.

Jochen

[mlapointe]

The main thing I need to accomplish is running the motor at a set velocity for a specific amount of rotations, in one direction. It would be nice to have the positioning, but not necessary as long as we can rotate the motor shaft and read the angular position. The only variable in our set up is the driver at this point.. we have the motor and controllers, just have to put it all together.  

I looked around an Danaher's website before but didn't find much, maybe I will try getting in contact with someone there.

[Poolean]

Hi Frank,

This particular thread has been inactive for almost 6 years, so getting a response on it is quite unlikely. You could try messaging the original poster directly, but it appears that he only ever commented on this forum, so a response from him may be unlikely.

I suggest making a new post in the Motion forums and link to this thread in your first post. Also in that post, you're free to ask any questions you may have that this thread didn't cover.

-Mike