Re: A MaxNc Retrofit on my Dyna-Myte 2000 CNC mill

Fred,

I had a machine with one of those drivers. They are simple and
interesting, but the controller software was terrible. I replaced it
with master5 and reduced machining time to 1/5 of what I had. These
drivers are not step and direction like most drivers we know. The
control software drives directly each phase of each the motor, and
driver only amplifies the signal. Very interesting and economic from
an electronics perspective, but very limited compared to what other
drivers with microsteping can do. I tried to wire the limit switches
many times and did not have luck. I always thought there was some
kind of error in the manual. I ended up replacing the whole thing
for a step and direction driver and a breakout board. If where you I
would do the same thing NOW.

Arturo Duncan

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "caudlet" <thom@...> wrote:
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Fred Howe" <fredhh47@>
wrote:
> >
> > I am retrofitting a dead Dyna-Myte 23000 CNC tabletop mill with a
> > MaxNc controller board and software kit that I purchased for about
> > $250.00 a few years ago. My problem is the limit/home switch
wiring. I
> > simply can't make heads or tails out of the single paragraph of
> > instructions about how to hook them up. What I have is two loops,
> > consisting of the 3 positive limit switches and the 3 negative
limit
> > switches, set up so that if any switch is tripped, it opens the
> > circuit. I am hoping to use the same positive limit switches as
the
> > Home switches by putting a switch in the line and directing the
output
> > to either the "Home" pin or the "limit" pin, as it appears that it
> > won't work to simply connect the switches to both at the same
time.
> > What mystifies me is where do I connect the "other" end of the
loop?
> > Ground? Someone suggested I had to supply a low level (<50ma) 5
volt
> > source. Does this make sense? I have listed the location of
pictures
> > of the circuit board, the circuit schematic and the very short
> > paragraph describing the hookup. If anyone can offer any insight
on
> > this problem I could complete my project. BTW, I know the MaxNc
board
> > is a cheap, cheesy substitute for a real controller, but I'd like
to
> > complete this project before I start trying to improve on it.
Thanks
> > for any help
> > Fred Howe
> > pictures are at:
>
> Fred I am not familiar with the specific controller you have but
from
> an electronics perspecitve you can't have switches in a series
> configuration (typically normally closed) AND an individual
> configuration for homing. The Home signals have to be for each
axis.
> Each axis as a separate Home switch. In some software you can
> designate the Homes as Limits too but they can't be in series
>
> You can connect all of your limits (sometimes called "hard limits"
and
> far limits in series and use the NC (normally closed) so that any
trip
> will open the circuit and trigger an e-stop. The Homes need to be
> separate swtiches, one for each axis. Homes can be NO (normallyu
> open) or NC depending on how you setup the software logic.
>
>
> Not trying to rag on you but for 57.00 bucks for our powered
hreakout
> and MACH3 (Mach as a MaxNC mode) you might have all the features
you want
>
> Tom Caudle
> Http://www.CandCNC.com
> "We just made CNC easier!"
>
> Hardware for Home Shop CNC:
> Low cost, powered/isolated, breakout card
> AC and DC "Drive Saver" power controls
> 2nd Generation digital THC
> Handheld Manual Pulse Generator (MPG)
>
>
>
> > www.professorwiz.com/fred/circuit1bd.jpg
> > www.professorwiz.com/fred/circuit1dwg.jpg
> > www.professorwiz.com/fred/description.jpg
> > or e-mail me and I will e-mail them to you.
> >
>