Motion 73xx Reset Position

[Daikataro]

Greetings everyone, I'm having a few issues with the "Reset Position" function in the 73xx pallete, concretely, it only works once, and only at the start of the program, after that if I move the position and call the function again, it sends an "OK" thru the error cluster, but does nothing. Here's the setup:

-NI Motion 7350 Card

-2 DC Servos powered by Kollmorgen Drives. 

-Drives controlled via Voltage output (+- 10VDC), feedback by encoder pulses

-Working in absolute position mode.

First time I call it, it works ok and resets the axis position to a value close to zero, but then it seemingly ignores it and does nothing. I have tried stopping motion killing axis before calling the function, enabling the drives (24V input hardware enable) with zero current before calling, nothing does the trick. Any ideas?

[Rscd27]

Hello,

Have you tried to use interactive exectution from NI-MAX to verify if it has the same behaviour?

Please send some screenshots of your code and if its possible MAX configuration as well.

Regards,

[ben64]

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@Daikataro wrote:

Greetings everyone, I'm having a few issues with the "Reset Position" function in the 73xx pallete, concretely, it only works once, and only at the start of the program, after that if I move the position and call the function again, it sends an "OK" thru the error cluster, but does nothing.

First time I call it, it works ok and resets the axis position to a value close to zero, but then it seemingly ignores it and does nothing. I have tried stopping motion killing axis before calling the function, enabling the drives (24V input hardware enable) with zero current before calling, nothing does the trick. Any ideas?

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Are you reading back the position immediatly after the execution of Reset Position.flx? Tere is a note in the help file that says:

Note  If you are using this VI with an NI 7350 or NI PCI-7390 device that you are reading positions on, it might take up to 5 ms for the application to display the most recently read position after you call this VI.

That might be your issue but it's hard to tell without seeing your code.

Ben64