On Sun, 23 Dec 2018, The Natural Philosopher wrote:
> On 22/12/2018 17:24, Gerhard Reithofer wrote:
> > Hi Theo,
> > On Sat, 22 Dec 2018, Theo wrote:
> > > Gerhard Reithofer  wrote:
> > > > Sounds interesting, but how do I controll these shields with a
> > > > raspberry?

...

> > What I'm dreaming of is a controller which allows defining a step input
> > (including speed and maybe acceleration paramaters) and the motor moves
> > to the position without any additional input. The final positition is
> > sent back or confirmed on request via the used interface.
> > Think of an axis contorl of a robot arm. The combination of several such
> > modules can be controlled by a raspberry because the hardware part and
> > the real time components are not important on that level. As example it
> > I would be very simple add a GUI for programming, etc.
> >
> > Is there a cheap solution known?
> >
> With that spec I'd certainly be thinking 'arduino or picaxe and stepper
> motors'

Yes, that would also definitely be my approach (I only know the Atmega
world and have never used PICs).
What astonisches me is the fact that there are many "simple analog
servo controllers" but a relatively limited number of solutions for
steppers.
And the mature developmemts I've found are fully integrated into a
specfic solutions and cannot be easy taken over into other requirements
(examples are the NC and 3d-printer area).

THX to *

--
 Gerhard Reithofer - Techn. EDV Reithofer - http://www.tech-edv.co.at

--- SoupGate-Win32 v1.05