[chbot] 6809 Processors

[Mark Beckett]

Wallace

It might be worth checking the earth and neutral connections back to the 
switchboard.
I've seen both get worse over time, and seen loose connections right at 
the board.

You can do a check using a length of wire and something to insert into 
wet ground, to see if you have a good earth at each piece of equipment.

mark

Marshland Engineering wrote:
> 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
>
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