Re:low cost stepper driver

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