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  1. Hi, I just got a laser printer and tried the transfer method, what a blast. Now professional looking boards are within reach. I used expressPCB and eagle BUT I don't seem to be able to get a good way to print it so I can transfer it? I can use the export to BMP mechanical and then add the traces and remove the components in photoshop but it's really long... Thanks for any help! Para
  2. Hi, I have built the board as a 2 axis test and it really works nicely but the motors were small and the lathe very small and shaky. Now I'm building it for a 4 axis mill so I added a 4th chip and some power darlington array I found in printers which each can handle up to 4 amps and 4 circuits each. Those are rated 4 amps max (STA401 if you want to look it up) and there are 6 in each printer. They should take up to 30 volts easy. I took the resistor networks that come with it and the addition is practically no-cost! I made a driver circuit using those to hook up directly to the UCN and then use the diodes at the driver output. That should take care of some nice amp there. I'll post on that. I will also use one of those to power 4 relays, one for the spindle, one for the vacuum cleaner, one for the lamp and another one for the fluid If I ever do aluminum with it. I have a question now, I would like to build a chopper/pwm to control the amps going out BUT I really don't know about using a pwm motor power supply with this board. Does any regular motor PS pwm controler should work for the whole load? Any tips and tricks on PWM? I was going to build a simple one with a 556 or 2 555 and some power transistor I found but ya know, maybe costly black smoke experiments... Thanks for all the advices guys, keep the post alive, it's usefull! Para
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