Hello!I have a third-party stepper motor. I have connected it to P70530 Device. And I have NI PXI-7340 and UMI-7774 in Stepper motor control system:NI PXI-7340 <---> UMI-7774 <---> P70530 ----> third-party stepper motorAll of this devices are working, stepper motor is driving, but I have a problem with Current reduction - I need to turn off step motor when it is not driving.When I connect only P70530 ----> third-party stepper motor (without PXI and UMI), and make connection with PC (via RS-232 Serial connector), I have Current reduction is working - there are no current in step motor wires. But when I connect all system: NI PXI-7340 <---> UMI-7774 <---> P70530 ----> third-party stepper motor Current reduction is disabled - motor stay without control pulses but there are current in step motor wires, and shaft is holding.Where can be a problem?

Hi All!Today I have solved the problem!I have start from the begining - power supply. I have used Acopian 24V unregulated power sourse for power UMI and P70530. And it was realy "unregulated" - it gives 27,7V on output - it is not bad for Power Amplifier, but for UMI input voltage it is possible use only 24V+-10% (26,4V - max). After I start use another power sourse with exactly 24V output - All start work right. Axises are killing, shaft is free.Thank's All support teem for help.

Motion Control and Motor Drives

P7000 Current reduction is disabled.

Solved!

Hello.

Thanks for a quick answer.

I'm going to use it with cRIO-9074.

Thanks

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Motion Control and Motor Drives

P7000 Current reduction is disabled.

Re: P7000 Current reduction is disabled.