Axis is affected by VFD

mcataluna · Post by **mcataluna** » Fri Dec 10, 2021 2:04 am

Hello everyone, we have a cnc acorn and XSY-AT1 VFD
We have a problem with axis when we connect the analog output of acorn to analog input of VFD
The axis automatically moving without command

What will be the solution?
Thank you in advance

Post by **cnckeith** » Fri Dec 10, 2021 2:39 am

search "VFD" and "Noise"
here is how.

Post by **martyscncgarage** » Fri Dec 10, 2021 9:29 am

mcataluna wrote: ↑Fri Dec 10, 2021 2:04 am Hello everyone, we have a cnc acorn and XSY-AT1 VFD
We have a problem with axis when we connect the analog output of acorn to analog input of VFD
The axis automatically moving without command

What will be the solution?
Thank you in advance

Keith gave you a suggestion to search.
Please follow and provide the information requested in this post:
https://centroidcncforum.com/viewtopic.php?f=60&t=1043

Post a picture of your control cabinet as well.
ALWAYS Post a Fresh Report when asking for assistance. F7 Utility, F7 Create Report
It contains your machine's parameters and logs. Have you taken a look at your error log? F7 Utility, F9 Logs, F1 Errors

Marty

mcataluna · Post by **mcataluna** » Fri Dec 10, 2021 10:09 am

Thank you everyone,
Now I have a view for the problem
I will post the Logs when I'm back to work.

Post by **martyscncgarage** » Fri Dec 10, 2021 11:22 am

Inexpensive Chinese VFD's can be problematic.
VFD cable sized and connected appropriately between the VFD and the motor is suggested.
automationdirect.com sells such cable. You need to know your motor current draw.

Marty

rk9268vc · Post by **rk9268vc** » Sat Dec 11, 2021 1:26 am

TLDR: Use shielded cable and terminate it properly

mcataluna · Post by **mcataluna** » Tue Dec 14, 2021 3:49 am

Thank you everyone, We solved the VFD noise problem by grounding the shielded cable to the body of machine.
Unfortunately, we encounter a new problem with the axis. When moving the z axis the axis travel exceeded by 0.01 mm every millimeter it travels, we check it by using dial indicator.

Any idea how to solve this?
Thank you in advance.

tblough · Post by **tblough** » Tue Dec 14, 2021 8:33 am

See this post on calibrating the axis turns ratio: https://centroidcncforum.com/viewtopic.php?f=63&t=1801

Post by **martyscncgarage** » Tue Dec 14, 2021 11:21 am

Are you following the Acorn Installation guide? If you follow the steps you should be golden.

Post by **cnckeith** » Tue Dec 14, 2021 4:51 pm

install manual.

is found here with all acorn documentation.
https://centroidcncforum.com/viewtopic.php?f=60&t=3397
https://www.centroidcnc.com/centroid_di ... manual.pdf

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Axis is affected by VFD

Axis is affected by VFD

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