RE: [CAD_CAM_EDM_DRO] Re:low cost stepper driver

For what it's worth Linistepper
(http://www.piclist.com/tecHREF/io/stepper/linistep/index.htm) makes a
single axis kit for $35.00 each or $90.00 for three axis kits. They're a
KIT (PC and parts) you put together. They're based on a PIC microprocessor
but I don't think you'd care too much. You still have to supply voltages,
heat sink & mounting bracket, unipolar stepper motor, and step/direction
signals

R. Wink



From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of turbulatordude
Sent: Monday, October 01, 2012 6:41 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re:low cost stepper driver





I have a simple machine that is made of MDF. it is not designed to cut
metal, just wood and plastics and such.

3 amp motors are more than enough.

the machine cost under $300 to build (motors were free)

it does not call for $100 each drivers.

an hour to make a simple circuit board that will run the drivers properly is
worth the tradeoff. not sure why there is an issue of disconnecting motors
with the power on.

it would be nice to make another one less than $100 in drivers and power
supply and motors.

$33 and axis is not impossible.

Dave

--- In CAD_CAM_EDM_DRO@yahoogroups.com
<mailto:CAD_CAM_EDM_DRO%40yahoogroups.com> , Ron Ginger <ronginger@...>
wrote:

>
> On 10/1/2012 6:15 AM, CAD_CAM_EDM_DRO@yahoogroups.com

<mailto:CAD_CAM_EDM_DRO%40yahoogroups.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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