Didn't know where to post this, so if its in the wrong area I apologise.
I've been asked a few times how I make my Prototypes at home.
I make my prototype boards, both single and double sided, with Negative Resist film & Solder mask with Dynamask.
Or pre-sensitised Positive boards, when I get them cheap enough.
I get these from
www.octamex.de.
I Design in EAGLE(free version), and here is the .scr file I use to create the Bitmaps for my printers (I have a 600 dpi & a 1200dpi printer).
RUN ulpmessage '<center>Saving Bitmap (.BMP) for Top & Bottom Copper<br>Solder Mask layers<br>& Top Silk Screen<br><author>Author: spycatcher2k@badnetwork.co.uk </author></center>';
DISPLAY = _current_layers_ @;
set palette black;
display none top pads vias Dimension;
export image top600.bmp monochrome 600;
display none bottom pads vias Dimension;
export image bottom600.bmp monochrome 600;
display none _tsilk Dimension;
export image silkscreen600.bmp monochrome 600;
set palette colored;
display none tStop Dimension ;
export image topsoldermask600.bmp monochrome 600;
display none bStop Dimension;
export image bottomsoldermask600.bmp monochrome 600;
display none bPlace tNames Dimension;
export image bottomsoldermask600.bmp monochrome 600;
set palette black;
DISPLAY _current_layers_;
DISPLAY = _current_layers_;
This is saved as NegOutBMP.scr and assigned to F12.
The version I have included is for 600 dpi Printers, but it is easy (and self evident what to change).
Negative exposure boards - use 'set palette black'
Positive exposure boards - use 'set palette colored'
The Solder Mask is Positive Acting for Exposure - but uses Negative developer.
If any one is interested I will post a full step by step write up of my process.
Drew.
