Re: Newcomer

I don't use KCAM but I believe it uses step/direction pulse (as most
'hobbyist' software). You can use PIC to translate the step/dir pulse
to your driver setup (like I did for my setup) or use standard TTL
chips for it (such as http://members.tripod.com/~schematics/stepper2.htm)

Check out these sites:
http://www.doc.ic.ac.uk/~ih/doc/stepper/
http://www.luberth.com/plotter/ditwasplotter.htm

Another forum site for DIYer,
http://cnczone.com

regards,

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Brad Woolley <brad@r...> wrote:
> Hi
>
> My first 'proposed' cnc will use some BiPolar PM55L048 steppers I
> salvaged from some HP Deskjet printer, these are 12v 800mA, they
step at 7.5
> degrees, my first attempt is only to be a small cnc for drilling
pcbs, The
> stepper driver circuit I am quite OK with I have already built a serial
> controlled PIC based driver using a ULN2803 driver, this uses half
step to
> give me 3.75 degrees per step.
> I am just not sure what the output is from the parallel port, on my
> serial version I have a VB prog that sends direction, no of steps
and the
> delay between steps, I suppose I could change this to read a GCode
file, but
> I really wanted to use KCam to drive the machine.