Re: [CAD_CAM_EDM_DRO] Re:low cost stepper driver

My HobbyCNC pro board has been working perfectly for like 4 years now - if
you don't mind soldering it's cheap and reliable :)

I don't know of any boards that don't blow up if you disconnect the motors
while it's running - I'm pretty sure that's a bad idea all around :)

Jamie
Check out my CNC projects (and more) at http://www.backyardworkshop.com

On Mon, Oct 1, 2012 at 7:24 AM, Ron Ginger <ronginger@...> wrote:

> **
>
>
> On 10/1/2012 6:15 AM, CAD_CAM_EDM_DRO@yahoogroups.com wrote:
> >
> > Posted by: "artgartg"lists@... artgartg
> > Date: Sun Sep 30, 2012 7:44 pm ((PDT))
>
> >
> > I've been looking for suggestions on modifying these chinese boards to
> improve reliability. Unfortunately Yahoo stripped your pdfs from the
> archived mail. Would it be possible to put them in the files section please
> ?
> >
> > I have found some articles on the web, mostly related to improving the
> optoisolator circuits. There are comments too about power sequencing, which
> these boards do not usually do correctly.
> >
> > I'm also interested in the reason these boards fail if a motor is
> disconnected in use, and wonder if it's feasible to add some protection.
> >
> > -adrian
>
> How long and how much effort do you want to put into maing a low cost
> board into a better board? Why not just buy a better board in the fist
> place. There are a number of good quality drives around now for not much
> more money than these cheap drives that are good industrial quality
> drives. Keling is one good source, but there are others.
>
> brings to mind an old saying about making a silk purse out of a sows ear.
>
> ron ginger
>
>
>


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