Replacement driver and switch arrived today so I was pretty keen to get them fitted. Had to earn some brownie points first though before I could play. I first checked the driver was working by rigging it up without mounting it to the chassis. Yay, it was working and the Y axis galvo was doing its thing However, there was a bit of a problem with the new driver - the mounting holes were threaded 4mm not drilled as clearance as the original ones were but as the bolts are captive, between the two layers of aluminium and insulation, there was no way of getting the driver attached. It was clear they had to be drilled out 4mm. This I did, being very careful not to get any swarf into the electronics. That done, the driver and switch were positioned and fitted.

Next the printer was fired up and I could finally do the calibration. The galvos needed a lot of adjustment to get the pattern right but I got there in the end. Probably have to wait till tomorrow to get some powder in and a test print done.

It's not clear from the instructions but I am assuming just a small ammount of powder can be used without having to fill the powder chamber? Can anyone confirm?