Re: [CAD_CAM_EDM_DRO] W.E.T.Re: BOSS stepper driver transistor

Scott,

I had purchased a Boss5 becuase it had the same problem.
I just kept blowning the "Z" axes transistor. I thought I could fix
it... not
knowing electronics at all...I was dreaming. However, I did meet a person
over the internet who spent weeks coresponding with me via email and
walked me through the tests and adjustments I needed to make to get this
machine working
and no longer blowning the "Z" transistors, it costed $5.00 after we
found the problem. I remember this .. all it
final took was adjusting a "Pod"
on the "Z" borad to the right ampage or voltage (I don't remember) and
it was fixed. I will try to round up all the
emails and notes and get them to you Scott -- that is if you would like
them. This guy knew these
machines inside and out and used 3 or 4 of them all time in his shop. He
felt the machine is too good
not to use and fix if you can't afford to retro-fit it. He was just the
blessing I needed.

I also have the books with all the schematic that were released for this
machine. I may be able to
get some scans for you if needed.

Don't know electronic ...but maybe I can in some way.

Luke



wthomas@... wrote:

>Hi Scott and All:
> From my experience repairing a Bridgeport CNC (I believe it was
>a model II) The former owner had traded it in because the Z axis had
>failed a couple of times and he was tired of the expensive service
>call to fix it. Upon checking with the Bridgeport service department
>and talking with an old timer he told me where look and locate the
>bad transistor. Once I found it and pulled the board, it cost me
>more to buy a large soldering gun, big enough to do the job,
>then it did for the one transistor that went bad. After that we keep
>a couple spare transistor around as it would always go out right when
>we needed to get parts done. So I would recommend buying a couple
>extra and having them on hand. MAY THE CHIPS SOON FLY
> GOD'S BLESSINGS
> Bill
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