Re: Power Supply & Gecko's

-

> There are a couple of possibilities. Unless your meter is really
> substandard,
> it sure looks like you have the rectifier miswired, and are getting
> a lot of

I'm pretty sure the bridge rectifier is wired up correctly, It's
pretty obvious which are the two AC terminals and the two DC.

The +ve of the capacitor is connected to the +ve wire from the bridge
rectifier, and the -ve likewise.

Is there something else I'm missing here ?

> AC sent out to the Gecko drives. That would blow the fuse, of

course.

> The Gecko drives should be drawing power straight off the main

capacitor.

> If you are putting heavy AC across the capacitor, that could

actually be

> quite dangerous. If there is any sign of it getting hot, stop

immediately.

> When these larger caps explode, the noise can be louder than a

gunshot,

> and the shrapnel can also be quite dangerous. (It also makes a

bloody

> mess!)
> Do you read the 150 VAC directly across the capacitors terminals?

I managed to get an oscilloscope onto the power supply today, it
measures no AC voltage at all (with no load).
So I guess it really is a cheap & nasty multimeter.

>
> >I do have some smaller caps around 9000uf and 10000uf if it would

be

> >better dropping down in size.
> >
> >
> Reducing the capacitor value is not going to solve this problem.
>
> Jon

I ran the machine for an hour or so today (at 42VDC ) and all seemed
OK.

Tim