setup of etch servo for 3 axis

Can anyone please help me to convert etch servo from a two axis to a 3 axis.When i try to use pncconf wizard i cant find the etch servo pncconf file to be able to edit it.

thanks

is it possible to use a second lpt card and then run the 3 rd servo from it?
where do you enter the amount of encoder inputs for one motor rotation?

thanks for your help

cant find encoder scale,only input scale in ini file,is this right

bit old topic but:

i think 'etch servo' project can be slightly modificated to save LPT pins. Look at my schematic. I used 4011 NAND gates to invert direction sinal from LPT port instead of software inverting in HAL file. I also used 4081 AND gates to put the same propagation time between LPT and L298 to make both enable lines switching at the same time. According to schematic up to four DC motors can be driven for XYZA operation or XY axis plus Z axis motor with doubled current (by shorting jumpers JP1, JP2 and JP3). I searched the web to find if L298 can be used in such a configuration and some sources said it does, the other said it doesn't. Got to try:)


Using this mod HAL file should be modificated:

net Xdir => parport.0.pin-02-out
net Xdir => parport.0.pin-07-out
setp parport.0.pin-07-out-invert TRUE
net Xpwm => parport.0.pin-03-out

Red coloured lines should be deleted as invertion is done by cheap logic gates on PCB.
All encoder inputs (including MPG) will be hooked up to the second parport but there are many I/O's left on the first parport.
Hope this will work. I'll check it as soon as possible and let ya know.