RE: [CAD_CAM_EDM_DRO] Re: low cost stepper driver

There are a few boards around that use the LMD18245 with micro-stepping
control. However, manufacturers are hard pressed to keep the costs close
to the smaller Gecko products.

It's the usual story, if you only need three buy high end. If you need
200 shop around. If you need 1000 make your own.

I released the ELS schematics and code into the GNU world. So if you feel
so inclined you could build up a stepper driver using the LMD18245 devices
along with a PIC or Atmel to have your own stepper driver. Don't think
you will save any money.

Since the source code is available for the ELS you could always modify it
to suit your application. I've done that for a genset and battery
charging system and it didn't even use the stepper driver.

John


"ELS! The Solution"
Automation Artisans Inc.
http://www.autoartisans.com/ELS/
Ph. 1 250 544 4950

> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of David G. LeVine
> Sent: Wednesday, June 27, 2012 5:34 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Re: low cost stepper driver
>
>
> On 06/27/2012 01:20 PM, jeffalanp wrote:
> > Hi,
> >
> > I think that will really come down to the mechanics of
> mounting the motor to the table and removing backlash.
> >
> > As far as the motor is concerned, as long as it gets the
> proper power it will turn. The motor requires power from a
> servo drive, which will get position commands from a
> controller and actual position from the motors encoder. The
> controller could be stand-alone on up to a PC running
> software like LinuxCNC. If you have a servo motor with
> matching drive, you still need a control source like LinuxCNC.
> >
> > Jeff
>
> Another thing to look at is John Dammeyer's ELS project. He does
> positioning with a PIC and takes commands from a keypad and display.
> The price is pretty reasonable and it includes a stepper
> drive system.
> It is built for a lathe, and does have extra stuff, but it is
> worth it
> for the ideas... Just remember that you don't need to buy one to see
> what and how he did things, but it may be cheaper than reverse
> engineering the system.
>
> Dave 8{)
>
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