Crankorgan,
Putting bluing on the whole board, then scratching it off with a
carbide metal scratch tip is the method I'm currently using to do boards. I
tape the copper down on a piece of paper, then run it through my HP plotter
(7550A). I get very clean lines and can get down to 10mil space 10mil line
with a bit of practice, double sided. I've written custom software to take a
Eagle board file and create HPGL which I then output to the plotter. This
method really works well since you can use a standard plotter (I just built
a special 'pen' with the carbide scratch tip) plus some software. Anyway,
the bluing/scratching method is alive and well . . .
*Brian
-----Original Message-----
From: crankorgan [mailto:john@...]
Sent: Saturday, September 14, 2002 6:41 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] Re: Inkjet printing PC boards
Larry,
I sell plans for a PCBmill (Brute) and I just finished a
machine that will mill or draw simple boards. (Morph)
Months ago I brought up the idea of Scratch and Etch. This
idea is not dead. First I developed a super simple CNC plotter. Now
I have a machine strong enough to drag a scribe through the blueing.
Several people tried Scratch and Etch With good results. Coating the
whole board and then scribing and isolation between pads for etching
seems easier.
Crankorgan John
Putting bluing on the whole board, then scratching it off with a
carbide metal scratch tip is the method I'm currently using to do boards. I
tape the copper down on a piece of paper, then run it through my HP plotter
(7550A). I get very clean lines and can get down to 10mil space 10mil line
with a bit of practice, double sided. I've written custom software to take a
Eagle board file and create HPGL which I then output to the plotter. This
method really works well since you can use a standard plotter (I just built
a special 'pen' with the carbide scratch tip) plus some software. Anyway,
the bluing/scratching method is alive and well . . .
*Brian
-----Original Message-----
From: crankorgan [mailto:john@...]
Sent: Saturday, September 14, 2002 6:41 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] Re: Inkjet printing PC boards
Larry,
I sell plans for a PCBmill (Brute) and I just finished a
machine that will mill or draw simple boards. (Morph)
Months ago I brought up the idea of Scratch and Etch. This
idea is not dead. First I developed a super simple CNC plotter. Now
I have a machine strong enough to drag a scribe through the blueing.
Several people tried Scratch and Etch With good results. Coating the
whole board and then scribing and isolation between pads for etching
seems easier.
Crankorgan John