Mark Robinson wrote:
> I take the extra step of sandwiching a small strip of pcb material between the
> films using double sided tape. It gives a good edge for alignment and reduces
> the errors from the film bending around the edge of the pcb. Then I tack the
> film to the substrate using adhesive tape to stop anything moving while it's
> exposed, inverted and exposed again.
That sounds like it might be a good way to align toner-transfer transfers...
Take an L-shaped offcut of PCB material (of whatever thickness you're using)
and transfer an alignment marker on one side.
Drill a hole in the centre of the alignment target, align it against the
bottom transfer so the marks match up, then tape it down with double-sided tape.
Cut the area around the alignment mark out of the bottom transfer, then put
the L-frame onto a lightbox.
Now take the top transfer, align it against the alignment marker, and stick it
down.
Iron on as normal.
Does this sound plausible? Seems it might work a bit better than my
tape-the-two-transfers-together method, which seems to fail dismally on
anything PCB blank thicker than ~0.8mm.
--
Phil. | (\_/) This is Bunny. Copy and paste Bunny
ygroups@... | (='.'=) into your signature to help him gain
http://www.philpem.me.uk/ | (")_(") world domination.