Re: BOSS5 Where to plug the Geckos???

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