motor speed in max

[John524]

I have a PCI-7356 motion card.

I am running two identical servomotors at constant velocity in Measurement & Automation Explorer's 1D-D Interactive window to test them.  Axis 1 won't run any faster than 3400 RPM, but Axis 2 will.  I don't see any other parameters to adjust in MAX.

What might be limiting the speed of Axis 1?

[AnalogKid2DigitalMan]

What drives are you using? Some drives have jumpers or switches or downloadable parameters to limit current and voltage to the motors.

-AK2DM

[John524]

I am using Vix drives from Parker.  I used a labview VI to display the DAC voltage while it's running, and axis 1 seems to go up to 32xxx and stay there, while axis 2 moves up and down with the speed input.

The PC keeps crashing and giving me the blue screen of death.  I think the motion card may be causing that, so the two problems may be related. 

[AnalogKid2DigitalMan]

Could be the card, you may also want to double check your wiring and all physical connections. Seems like 32xxx counts would put the pedal to the metal for the motor on the offending axis 1.

-AK2DM

[OliviaC]

Are the configurations identical between the two motors (i.e. axis config, acceleration, decelearatin, target, etc.)?

Have you  swapped the two motors to see if you see the same behaviour?

[udi_priyal]

Can you have sample vi for Vix parker driver with labview.?

-Thanks

UD

[Ricky_V.]

Hey Udi,

Since it looks like they did not originally post the example VI, I do not know if they will get back to this one. This thread has been in active for 2 years, I think the best route to take would be to create a new thread and ask if anyone has an example VI for the Vix Parker Driver.

Thanks,

<Ricky Van De Graaf | Applications Engineering | National Instruments> 

[Highland_Controls]

I have done several ViX projects, and each time I say will never do another one.  The firmware is rather buggy.  Anyway, here are a few basic VI's.

[Highland_Controls]

One more..

[udi_priyal]

Thanks,

udi