Hi Guys,

Hope you can help me out here.

I have the PCNC1100. Once in a while, not every time, I get a power trip and an error message on my VFD when I engage my spindle, in auto or manual, high speed or low speed.
The power trips at the DB board so everything shuts down. The only error I see is on the VFD, it says "tr uv" which means tr = trip and uv = undervoltage.
My input voltage is fine. I figured that the error has to do with the VFD.

Evertyhing else works fine, I can move all three axises at the same time but when I engage the spindle it trips the power.

I had the error before but I couldn't find anything wrong at the time. Hours later the error disappeared and the machine worked fine again for weeks.
Today it started again.

Have any of you experienced this error before and what can cause this??

Any advise would be appreciated.

Regards
Juan
South Africa