[chbot] 6809 Processors

[Marshland Engineering]

The power to the main display is a switch mode supply and I have changed the 
caps.
The mill is a 220 V 3 phase so it already runs through an isolation 
transformer from 440V.
As it has got worse over time I'm looking at what could be the cause.

The TIG welder is switchmode, however it's not the weld that does it but the 
high frequency spark at the start. The spark jumps 5-6 mm and the mill goes 
awol even though its 6 meters away.  That reminded me, I've been playing 
around with ignitions and was using the variable speed in the mill to swing 
the rotors. As soon as the sparkplug fires, the mill goes off.

So it's the a tiny high voltage spike that get through. May not even be 
through the mains.

Cheers Wallace