In message <
42A6D181.3050208@...>
David McNab <
david@...> wrote:
> Acetone is much better - I really should get some.
The best thing I've used is 600-grit 3M "WetOrDry" silicon-carbide paper. Put
the board in a bowl full of water, then use the wet-dry paper to remove any
dirt on the board. Rub in two orthogonal directions, then lift the board out
of the water. If water beads up on the surface, give that area a bit more of
a scrub. When the board is perfectly clean, the water will form a
more-or-less solid "sheet" on the copper.
Takes about 10 minutes to do it properly, but it gets all the crap off. Same
trick works for removing the toner, though I sometimes use acetone for that.
Spray the board with flux after you've removed the toner.
I'm going to try and get hold of a pair of broken Laserjet III printers at
some point. Hopefully it shouldn't be too hard to build a controller for the
fuser. Need to get a thermocouple or a PT100 sensor first though (to set the
trip point on the temperature controller).
Just out of curiosity, what temperature are you guys running your fusers at?
Later.
--
Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB,
philpem@... | ViewFinder, 10BaseT Ethernet, 2-slice,
http://www.philpem.me.uk/ | 48xCD, ARCINv6c IDE, SCSI
For sale: Minor planetoid. First person to land there gets ownership.