RE: [CAD_CAM_EDM_DRO] stepper driver help

Hi John,

I agree; the LMD18245 boards from ELS are a good choice for a small PCB
router!

PICstep also has a very similar board project:

http://www.fromorbit.com/projects/picstep/index.php


Now who would be making a stepper board with a dsPIC? ;>)

Alan KM6VV

> H Stefan,
>
> The National Semiconductor device LMD18245 is a Full Bridge Driver that
> can work up to 55V and 3 Amps. Two of them make a decent 3 Amp
> Micro-stepper driver. I've used these on the Electronic Lead Screw for
> the Z axis drive which on my Gingery lathe has a 270 oz-in motor.
>
> I've also tested the driver donated to the ELS project from
> www.ohmikron.com which uses these devices too. They supply a turn key
> ready to go driver and parallel port interface. A friend is also using
> them for an XYZ Router Platform.
>
> I've built up the kits from www.embeddedtronics.com which also uses the
> same drivers. I have three of those on an XYZ pick and place system.
>
> Finally, Aaron at http://www.bright.net/~agarb/STMD/AVR_STMD.html is
> donating an AVR based micro stepper driver to the ELS project. It
> should arrive in a few days and I'll test it out with the ELS too.
> Judging by the WEB site presentation this also looks like a nice product
> and it has built in opto-isolation. And like the embeddedtronics.com
> product, a bare board and programmed microcontroller are available if
> you like to assemble things yourself.
>
> Above 3 amps AFAIK the only inexpensive drivers are from GECKO. It's
> only a matter of time before someone uses a dsPIC to drive 8 FETs to
> make a 7A at 80V competitive product priced at bare circuit board and
> processor for under $20.
>
> John Dammeyer
>
>
> Automation Artisans Inc.
> http://www.autoartisans.com
> Ph. 1 250 544 4950
>