Motion controller card need to program PWM or not?

[bkk]

I just want to know about motion controller card (coz may be i will use it)

First, Motion controller card need to program PWM for drive DC motor or not? (If I want to control the dc motor by PWM signals!)

Second, If my motor have encoder (increment) the motion controller card can be read the position or speed directly or not?

Third, Normally motion controller card need Labview for programming or not?

Lastly, Please, could someone give me some example programming or .vi for basic closed-loop dc servo motor ?

[Jochen]

bkk,

here are the answers you are looking for

1. Motion Control boards like the PCI-7344 generate a +/-10 V signal to control DC axes. As they can't provide enough power to drive a motor directly an external power amplifier like the MID-7654 or a 3rd party drive with a +/- 10 V command input is necessary. Typically these power drives generate  PWM power signals for the motors.
   
   
2. All NI motion control boards provide inputs for quadrature encoder feedback (position and velocity).
   
   
3. The NI-Motion driver provides a well documented API for LabVIEW, C and other programming languages.
   
   
4. After installing the NI-Motion driver you will find lots of example programs for LabVIEW and C that demonstrate every aspect of the boards' functionality. NI motion controllers run the control loop in hardware so the examples will work for both, closed loop and open loop (stepper motor) applications.

I hope that helps,

Jochen Klier
National Instruments Germany