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Thanks Keebler,

The bus sits at around 330v, it rises to this within the time it takes to get from the front of the machine to the control box round the back.
I have also tried (as suggested in...

Our minimill is suffering from bus undervoltage errors unless it has been on power for a long time, was an hour but its getting worse, yesterday it took 6 hours.

Its a 2007 machine with a 20HP...

Hi all
I'm a retired electronics engineer with an interest in all sorts of stuff,
Currently I'm spending my time at a friends small CNC facility looking after the workshop and machines.

I found...