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To add to this ...

Recently my Laser PSU died.
So, I've had to read up on PSU wiring, inputs and outputs ...

The return wire from the tube is connected to the case/chassis !

so, if you get...

OK .. short answer is yes :)

My K3020 arrived today ... with a dead tube :(
but !
I wired up the PSU to my 50w tube and it fired up ok :)

I've ordered a 40w PSU £60 inc post ... and will...

That's what I'd read.... just considering offering birch ply too, and acrylic ... and ... :)

Thanks G

I'll put on here how I get on.

From what I've read, your corner problem is common for 'beginners'
The laser power for cutting at full speed, is obviously more than is needed when it...