Homebrew PCBs

Thanks, Rob, for the detailed information - very informative. The 
spark seems to be a single spark, not always present, seen after the 
board leading edge leaves the printer. I've been assuming it's static 
electricity. I've been handling the boards as they leave the printer 
(careless??) with no problems, i.e. no shock.

The ML-2510 is an inexpensive Samsung printer in which the real 
action takes place as the paper rides up along the rear of the 
printer. There is a set of powered rollers just below the drum that 
helps push the board up through the drum mechanism. The drum has it's 
own geared rollers as well, but I think the push from the bottom 
really helps keep the speed constant. The board only travels about 2 
inches inside the printer, feeding in from the bottom, out from the top.

I have a service manual for the printer if you would like to take a 
look. Unfortunately the schematic pages are not there, even though 
the site I bought it from said they would be.

BTW, I get really nice prints on aluminum sheet, too.

Mark