There are other Lexmark models that work, but I've been sworn to secrecyby the person who modified one who wants to keep the price down fornow.
HP printers are very readily available for very little money, and some ofthem are easily modified to physically pass copperclad. However, whenthey print, they usually print outlines of the traces, not the fulltraces. I have found some materials that you can coat the pcb with thatsolves the problem, but I really wanted not to have to pre treat the pcbbefore printing.
I'm pretty sure the problem is the voltages used to charge the drum. In afew months I'll have a lot more time to spend on this, and one thing Iwant to do is experiment with changing the voltage on HP and otherprinters.
I think that Brother printers will print to copper, but they are hard tomodify the paper path because the paper actually travels through thetoner cartridge / drum removable unit.
Mark
At 04:38 PM 1/6/2015, you wrote:
Anyone have any success withprinters other than the Lexmark or the Ell 1720?
Mark: Any thoughts on why those printers work but not the HPs?
LeMar