Re: Xylotex Pwr Sup replacement

wow, it looks like I might be the only one actually answering your question.

seems many are intent on not answering and trying to convince you to us something other than what you have.

the rated MAX voltage of the chip in the Xylotex is 35 volts.

if you use a 24VAC xformer and cap's you will wind up with around 34 volts.

if you drop a volt for the diodes, you will still be on the high end. if your incoming power spikes or your have a very hard decel, you run the risk of increasing the voltage.

using a power supply that will output 30 volts or less will run the motors just fine.

as to the comment about not getting at peak power out of a drive, the old idea that you have a 500HP Shelby GT and drive it to work at 45mph would apply. you have far more capacity than you need.

Dave

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Chuck Merja" <chuckm@...> wrote:
>
> Thanks Dave - Do you mean stay below the 24V of the current PS? So could I
> temporarily go down to automotive voltage levels, and use either a gel cel
> or lead acid battery with an automotive battery charger? I have several 6A
> ish automotive chargers. Or break into a UPS and tap off the battery?
> Thanks, C
>
> _____
>
> you really need to keep the voltage lower.
> remember that the decel of a drive will spike the power supply. fast decel
> times can make the voltage jump.
>
> if you can put your hands on a computer battery back-up, you can get some
> high amps from the transformer.
>
> also, a car charger will have a large transformer.
>
> you will still need capacitors and diodes to get DC from these AC units.
>
> you can lower the amp rating of the drive temporarally while waiting for the
> perfect fix.
>
> all electronics offers power supplies that are DC, you should be able to get
> one in a few days.
>
> Dave
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com
> <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com> , "ebiz_59" <chuckm@> wrote:
> >
> > Murphy bit the Xylotex box on our minimill tonight. It appears as though
> the 24V 6A power supply gave up the ghost - just when we were FINALLY making
> our first part for our FTC robot.
> >
> > So I need some ideas for replacing this power supply quickly. I think I
> saw a 30V power supply on an HP printer the other day, but I'm thinking it
> was only a couple amps. And I think I might have a 15-20V 4ish amp laptop
> supply lying around.
> >
> > Any other thots? And what are the odds that the Xylotex drives are OK if
> this power supply board is only putting out like 1.5V? Should I be looking
> for another set of stepper drivers too?
> >
> > Ugh! Chuck
> >
>
> ._,___
>
>
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