Servo Motor Control

[DavidT]

Hello everyone,
Id would like some general advice on Servo Motor Control. Currently, im using a 6601 card to generate TTL pulses to control a Baldor DC servo motor through a closed loop PID system. The Motor is controlled in Position mode.
My vi only allows for a 50Hz update rate. (I have set the pulse frequency to 250kHz, what does this mean when writting pulses to my servo?) I would like to improve the speed at which the servo motor moves (i.e. id like to reach my setpoint quicker).
Is there a big advantage in using a Motion card or PXI card to control my servo motor?

any advice or hints would be greatly appreciated.

thanks!

[George M.]

Hi,

I don't understand how you are controlling a servo motor with a counter/timer board. Nonetheless, this issue can be greatly simplified by using one of the motion control boards. I would suggest the PXI-7344. This board is for stepper motors and servo motors. If you need information on how to purchase on of these, please let me know. Thanks, and have a great day!

[monaxanon]

I use this VI to control a cooling system, using sensor (thermistor),   lamp, relay  and a dc motor. I measure the thermistor temperature and set a threshold to turn on and off the lamp and the motor. is there a better way to do it?

[sushma]

Hi ppl.....

I am trying to implement a VI using PWM to control a servo motor ....................

Any help coming in will be appreciated

[AnalogKid2DigitalMan]

sushma:

You currently have 4 other threads asking help for control of a stepper, one of which you said you had a working solution. Now you are asking about servos which operate totally different from stepper motors. Please keep discussion on one thread and include what hardware you have to work with (motor driver, motor, DAQ card) so that others may help in an efficient and timely manner.

Thanks

[stilly32]

Hey Monaxanon,

I took a look at your vi and it looks like it should be ok.  What effect, if any, does the motor have on your system? As for better ways, PID control is pretty popular but depending on your system could be overkill.

Hope this helps,

Andrew S.

National Instruments   

[sushma]

Hi ....

I know it may sound unreasonable but my project is to control the speed of servo and stepper motors using PWM.I found help on stepper from this forum so I was sure to get some help with servo too.I dont know wat kind of servo motor to use to......I am completely new to working on motors.I would be glad if you give me some specs about wat kind of motor and driver to order .....I am looking for something which can operate between 5-9V  and below 1 A operating current.Please help me I have only a week more to finish this project.