RE: [CAD_CAM_EDM_DRO] Re: low cost stepper driver

Hi

There are a number of people making stepper driver boards using the
LMD18245 driver chips I used in the ELS. These are good to 55VDC and 3A
and so will work with a 36V to 48V supply. They are fairly robust with a
thermal protection sensor inside. The processor that runs them takes care
of the Microstepping.

However, the smaller Gecko's end up being close to the same price so it's
hard to say if rolling your own is worth it.

John Dammeyer

"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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