no feedback from resolver after upgrade from 7 to 8.2

[Matthew - Omaha]

Hi,

I am running a Pac Sci servo motor as a stepper (with step and direction signals) and

using the resolver as feedback (analog channel 1) with a PCI 7344 motion card.

I have updated NI Motion device drivers, firmware, and LabVIEW 7 express to 8.2. 

In measurement and Automation I reconfigured closed loop stepper using analog feedback.

1-D interactive:

I command a move, the servo moves, but the position display does not change, only the following error increases.

The servo movements are in the correct direction but result in different magnitudes with the same movement command.

The system worked fine on a different computer before upgrading the motion drivers, firmware, and Labview.

Where do I start?

Matthew

[Jochen]

Hi,

If the position doesn't change this means that the board can't read the feedback signal for some reason. If your position stays exactly at 0 with analog feedback enabled please check the cabling for your resolver (is it powered?). Please check if the ADC is working correctly by reading it in an application (please unmap it from the axis before).
You could also try to find out if it works correctly when you rewire your motor/resolver to work with another axis.

Please let me know how it works

Best regards,

Jochen Klier
National Instruments Germany