Settings for stepper motor

[psdy]

Hi Brian,

              I had been working on the stepper by reducing the rpm to 0.1 (absolute velocity is not important but uniformity is). Right now, my displacement curve shows a wavy pattern ( specifically I can identify 3 different segments - each segment however is more or less linear ).

I have been working with 10000 microstep ( reduced it to improve the torque as per your suggestion).  Wondering whether by further reducing rpm and changing s-curve parameters (in NI MAX)  is there a way out ? The NEMA 34 motor I am using  is capable of 1710 oz-in torque. Also, i did not get your stacking of motors - can you give me some info about how to do it?

Regards,

Partha 

[Brian_Beal]

I don't understand what you mean about your displacement curve being wavy.  Can you post an image?  It looks like you have a 3-stack motor.  That just refers to the motor size(length).  S-curve may help, but I think there is something else happening.

[AliT]

Hi, I'm not sure whether this is the right place for asking this question or not and if not, then please guide me to the right place for asking such question. Thanks.

I have a stepper motor with the Vector Network Analyzer Anritsu MS4623B. I got it up and running with the LabWindows/CVI. I need to sync the motion of the stepper motor with my data acquisition. Basically, I have to acquire the data in a way that in the start the motor will come back to home position wherever it was and then I want to move it to the specific position to do the measurements (For Example, I want to measure the 40 GHz channel between 1m to 3m movement of a stepper motor on a linear positioning system (ball-screw)). I've interfaced the VNA with the PC using LabWindows/CVI and I've controlled the clockwise and anti-clockwise movements of the stepper motor using LabWindows/CVI but I'm unable to sync the system in a way that whenever I run the code, the motor will run back to the home position and then move to a specific measurement start position and move till the end position and in between do the increment and stop and acquire the data. Is there any one to help me please? It's really urgent please and I'm doing this thing first time so please guide me in a proper way. I shall really apprecaite that and will be highly obliged with you. Thanks for your time and concern.

Thanks and Regards.

[Greg-H]

Hi,

I see you have made this same post in several different threads.  I would check the new thread you created and continue that conversation there.

Regards,

Greg H.