> toner transfer. Only problem with toner transfer is the "scaling"
> issues either through the printer or from the paper not being
stable
> which causes problem with CNC drilling.
If you bave scaling issues - they will exist with a laser or inkjet
printer. My inkjet printouts (using corel draw) are so precise, I
can actually print grids and squares to calibrate my cnc machine. I
have printed rulers and checked them with my digital calipers, and
they are by far - very accurate. I dont know what software your
using to create the images, there are a billion options. Simply in
corel draw, I can create tiny lines and examine them against a
precision ruler using a 10x magifying lens - matching dead on.
If it is out of scale for toner transfer, then that same image you
will use for photo-resisting, will also be out of scale.
> The first "problem" I suspect I will run into is getting enough
> density on the transparency to make sure the "black" areas are
dense
> enough to block out the UV exposure lamp where needed. Has anyone
> run into this issue and how do you deal with it?
When I attended the seminar on homemade pcb making, there was a large
variety of people that have had very good success for YEARS doing
photo-resist etching. They say it takes about 15 minutes to expose a
very exact board with SMT leads. A standard laser printer provides
enough coverage on a transparency to expose the image. I was told
they order the "GC" type boards from DIGIKEY.
Hope this helps a little.