Re: BOSS5 Where to plug the Geckos???

Keith,
Thanks for the response. I spoke with Mariss earlier today and he
seemed to think that the factory power supply was up to the task...It
works now just fine, aside from those pesky transistors burning out
all the time. No sense in spending $ on a PS if the factory one is
matched to the motors and isn't fried. So far I haven't cut anything
on the machine yet...and I've had it for 6 months now ~ getting antsy
+ friends are wondering when they will get their token part for
helping me unload it from the Ryder truck. :)

I bought some torid transformers for use with servos...which will
wait for now because I just want to get this puppy moving reliably
with the steppers and 202s. I don't have the caps or bridge for the
new PS...so it'll be a backup for now.

If you can send me some schematics/pics or anything to help, that
would be great! em is braidmeister|at|yahoo

Thanks!!!
-Brady

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Keith Clark" <mail@t...>
wrote:

> Brady,
>
> I have done my Boss6 BP with a new 16amp 70V DC powersupply from
> www.transformertechnology.com for the motors. I used a 110v AC

from

> the back box to power the Campbell board and coolant pump. I don't
> know if your powersupply will be reliable. Mine had the caps burn
> up. I also used a new 24v DC supply to power the solenoids for
> spindle speed and brake. The steppers are working great for me now
> that I have everything hooked up correctly. I did replace them but
> the old ones can do a fine job wired in half-winding mode. That is
> the trickiest part of this retrofit. The new Gecko 202s should

make

> that part less expensive as I had to replace about 6 of them until

I

> figured out the problem.
>
> I have the wiring diagrams and could copy the relevant charts or -
> We could talk on the phone with me looking at the wiring diagrams
> and my machine with you looking at your machine with a voltage
> tester to figure this out. If you want to use the existing
> powersupply and it is not reliable, you may regret it. Others here
> may be able to tell you how to figure out if yours is good or not.
>
> Keith Clark
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "braidmeister"
> <braidmeister@y...> wrote:
> > Hey groupies!,
> > It's been a while since I have posted. For the time being, I am
> going
> > to hold off on converting the BOSS over to servos. With the new
> Gecko
> > 202s available, I will be using them to push the factory steppers
> > around....but here's the $6 million question: If using the

factory

> > stepper power supply (which is like where?) where do I connect

the

> > Geckos to power?
> >
> > I'm pretty sure that I am supposed to pull power from a big
> capacitor
> > somewhere....which after I pulled out the tape drive I could see

4

> > big caps ~ One on left is blue with one terminal #72 (label
> missing
> > on other), and 3 silver caps that have a #39 terminal and #24,
> #26,
> > #28 respectively. After I powered up the big electrical box, I
> took
> > some readings on the #terminals that corresponded to the
> capacitors.
> > I got a voltage of 61.4-61.9v (seemed to flux a bit) when I

probed

> > each pair. Do I pull power for the steppers off of these?
> >
> > Any and all help is greatly appreciated!!! The sheer number of
> wires
> > and boards in there (side cab) makes it a bit confusing to know
> what
> > to keep and what to yank....any ideas, pics, links?
> >
> > Thanks!!!
> > -Brady