ni 9263 for step signals of STP-DRV-4035

[abcdhi]

I try to use labview and NI 9263 module to supply step signals for STP-DRV-4035 drive. But the peaks of sine function were flattened. the MAX pressure can reach 2V only. I do not know the reason.

[Esteban_B]

Hi acbdhi,

The NI 9263 is a 4 channel Analog Voltage Output. I was looking at the specifications of this device (that you can find here) and the current drive for this module is ±1mA per channel max. Based on your description what I believe is going on here is that the the STP-DRV-4035 needs more current that the available in the device.

I checked the datasheet for this microstepping drive (found here) and it seems to needs current from 5 to 15 mA. My recommendation will be to design a power stage between the daq device and the microstepping drive, with a external power supply for it. This will allow you to have the same control signals, but with the power that the drive needs.

Hope this works for you!

Regards, 

[abcdhi]

Thank you very much! I also think the current my daq supply is too low. Could you give me a solution for it? I do not know how to design a power stage for NI 9263 with a external supply. Thanks!

[Esteban_B · Accepted solution]

Hi abcdhi,

A power stage circuit can be as simple as the one I attach, you need to do this for each ouput from the DAQ device and plug it to a power source able to supply the power that the driver needs.

.

Regards, 

[abcdhi]

Thanks a lot. Also, I have a NI 9265 available. It can supply a current of 0-20ma. Can I use it to supply control signal. Thanks!

[Esteban_B]

Hi abcdhi,

This device, the NI 9265 is an Analog Output current supply. This device is set only to output current signals, and what you need to output is a voltage signal.

The NI 9269 that you can find here, and the NI 9264 are AO Voltage devices that have 10mA and 4mA output, but this is lower than what the drive needs.

I think that the NI 9263 that you have and the power stage will be the best choice.

Regards,

[abcdhi]

Thanks for your patient reply. I have controlled one motor  according to your recommendation now. But there is still a question. I want to use two ports of NI 9263 MODULE for two motor controllable. When I supply signal to the second port, there is an error-50103 occurred at DAQ assistant.

The prompt is that Possible reasons: NI platform services: the specified resource is reserved. the operation could not be completed as specified. Could you tell me the reason? How can I use two ports of NI 9263 MODULE to supply signals seperately at the same time ? 

[Esteban_B]

Hi abcdhi,

When this error appears, the general explanation is that when you set a task, the driver reserves part of the hardware available to perform that task, so if you create a second task that for any reason uses those same resources, this error will come up, because the resources are reserved for that same task.

With the description that you are telling me, to have two outputs, will be better to use the same task, with two output channels.

You can find more information about this error here and here.

I hope this will help you,

Regards,

[abcdhi]

Thanks a lot for your helps! now I solved all problems.