Homebrew PCBs

*scratches head*

Yes, LinuxCNC & pals output step & dir via the parallel port, but the
printer/plotter/router doesn't understand it.

You need to bypass some or all of the electronics to get at the steppers.

Tony

(...waits for the "yes I have 297 etc" response)
(*scratches head again*)



> linuxcnc outputs step/dir directly and is configurable and needs no signal
> conditioning before a l293/97 etc. conditioning or coding is only
necessary for
> microprocessors. i have three sla7086 printer stepper setting on my bench
now
> that run just fine
> 
> On Fri, Jun 22, 2012 at 7:36 AM, Tony Smith <ajsmith1968@...> wrote:
> 
> > **
> >
> >
> > > LinuxCNC (or anything else for that matter) won't talk to the
> > > CriCut,
> > you'd have
> > > to add your drivers and bypass all the electronics. Most of these
> > > things
> > use some
> > > form of HPGL, or mangled a bit to provide security (presumably
> > > that's how
> > it
> > > was reverse engineered).
> > >
> > > not necessarily true some printers run a simpl l293, 278 or 298 that
> > > will
> > directly
> > > communicate with lcnc, i know ive built them, however if your
> > > machine is operated via microprocessor without the source code it
> > > will not work as
> > you
> > > say. This is why i said the pinout was necessary as if it has enable
> > input
> > , or bus
> > > line it probably will not work, if it has simple step and direction
> > inputs
> > as per the
> > > ic mebtioned above I could make it work. I say try it the only thing
> > > he
> > has to lose
> > > is some time.
> >
> > Well, what I meant was there will be some electronics before the
> > stepper drivers (293 etc), that converts the HPGL (or whatever) to
> > Step & Direction.
> > Some use weird driver chips simply replacing the lot is easier than
> > figuring it out.
> >
> > You can't just plug it in as it and expect it to work.
> >
> > Tony
> >
> >
> >
> 
> 
> 
> --
> jeremy youngs
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
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