I miss the awesome PCB etching setup I had back in the media lab so I decided to put together one here at home.
So far so good, it took 3 tries to get anything decent out of the toner transfer system. I highly suggest the “dowel roll” method for high pressure. All in all, I dont like toner transfer. Photoresist is way superior. However, if you have a laminator apparently everything works a lot better so I’ll be looking into that.
I have some more photos on flickr and a more detailed tutorial later. The etching system is the hardcore MG 7liter. One thing I can say for certain: its more than 7 liters and, secondly, its very hardcore. The regulated heater, thermometer and sparger are awesome and saved me the effort of building a similar system. I etched my 3″x5″ single sided 1oz copper board in about 5 minutes. With a high quality image transfer system (like a simple photoresist) one could definately go down to 10/10mil rule.
I think its way too big though, who the hell etches 8″x12″ boards? I can rarely get consistant exposure over 6″x8″. I may get a different sized tank and keep the nice heater and sparger/manifold/thermometer.
Drilling is performed with a Dremel “multi pro” 3-15krpm in the Dremel “workstation/press” fitted with carbide wire-size drills.
Anyways, thumbs up for the MG “pro etch system” and a no-so-thumbs up for the Pulsar toner transfer system.Related
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