How can I get the speed of the stepper motor

[24848702]

With the sequence of pulses applied to the inputs of stepper motor , how can I get the speed and angle of the stepper motor.

[Torba]

Hello Vinoth,

Thank you for contacting National Instruments.  You can obtain the position and velocity for your stepper motor in MAX under the Current Trajectory Data section of the 1-D Interactive window for your axis.  If you are more interested in obtaining position and velocity in a programming environment such as LabVIEW, you can get position and velocity through the use of "Read Position.flx" and "Read Velocity.flx" VIs.  These VIs can be found in the Trajectory Control palette under NI-Motion.

To translate the current position to an angle, divide the current position by the known steps per revolution of the motor.  Then convert the remainder of the division to degrees.

Regards,

Mike T

National Instruments

[AnalogKid2DigitalMan]

Cross post with more details here, does not sound like any motion control hardware is involved.

http://forums.ni.com/ni/board/message?board.id=240&message.id=3993#M3993

[sushma]

Hi ......I am trying to control the speed of bipolar stepper motor(STH-56D101) using the Motorola SAA1042 driver and the technique being used is PWM.The VI we are generating is not giving us the PWM wave we need instead its generating a square wave and thus we see no movement in the motor.Plz help me i have been stuck at this point for more than a week .............:womansad:

[VuD]

Hello Sushma,

Thank you for using our discussion forums.  This issue is already being discussed in another forum.  See link below.

Duplicate posting
http://forums.ni.com/ni/board/message?board.id=240&message.id=4248

Regards,
Vu D
Applications Engineer