I have seen and run machinekit, it is linuxcnc. I have also read about 
BeagleBone. There are plenty of devices suitable to generate the pulses but at 
which rate should pulses generated? Constant acceleration between different 
speeds?


On Fri, 18 Mar 2016 12:50:21 -0700
"John Dammeyer" <jo...@autoartisans.com> wrote:

> You might look at the Replicape and a BeagleBone Black.   There are several
> other capes including one with a standard DB-25 parallel port that run
> LinuxCNC on the Beagle.   Search for MachineKit.
> 
> John
> 
> > -----Original Message-----
> > From: Nicklas Karlsson [mailto:nicklas.karlsso...@gmail.com]
> > Sent: March-18-16 12:27 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] Stepper, ideal pulses without feedback
> > 
> > 
> > Nice box and standard port is always good, I should think about it.
> Steppers
> > are for an xyz engraver so it is essentially a mini CNC machine without
> tool
> > changer.
> > 
> > 
> > 
> > On Fri, 18 Mar 2016 12:00:55 -0700
> > "John Dammeyer" <jo...@autoartisans.com> wrote:
> > 
> > > You are welcome to look at my Electronic Lead Screw Code.  Follow the
> > link
> > > to the code.  It's written for a PIC in C.
> > > John
> > >
> > >
> > > "ELS! Nothing else works as well for your Lathe"
> > > Automation Artisans Inc.
> > > http://www.autoartisans.com/ELS/
> > > Ph. 1 250 544 4950
> > >
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: Nicklas Karlsson [mailto:nicklas.karlsso...@gmail.com]
> > > > Sent: March-18-16 11:46 AM
> > > > To: emc-users@lists.sourceforge.net
> > > > Subject: [Emc-users] Stepper, ideal pulses without feedback
> > > >
> > > >
> > > > I am planning to use a micro controller for stepper step pulse
> generation.
> > > I
> > > > have considered to use an inverter card but special purpose stepper
> > > circuits
> > > > are cheap so I use one of these instead. It should be possible to feed
> > > timer
> > > > values then toggle should happen via DMA timer output compare values.
> > > >
> > > > Can anyone suggest how an ideal step generation curve should look?
> > > > Constant acceleration up to top speed? Constant deceleration from top
> > > > speed to zero? Or just stop generating pulses?
> > > >
> > > > Regards Nicklas Karlsson
> > > >
> > > >
> > >
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