Re: [CAD_CAM_EDM_DRO] caps

rekmac wrote:

>
> I know there has been discusion on the use of caps. Well the machine
> I am trying to retrofit has 2- 33000uF 48v caps. I know this may have
> been answered already but how are these tied in to the system? Off
> the + side one of the wires goes to what looks like a bridge.

Actually it is the reverse:

AC (120V or 220/240V ) comes into the transformer, out of the
transformer into the bridge (where it is rectified), out of the
bridge to the capacitor(s) then on to the motor drivers.

BTW, on a recent retrofit of a Supermax mill which originally
used a Bandit controller, the Bandit used a 48V supply.

By going to 75 volts (and keeping the same motors) the performance
seemed to sparkle (ie MUCH greater speeds) in comparison.... so don't
feel compelled to stay with 48V if you are putting the machine to
commercial use.

regards
Doug Fortune
http://www.cncKITS.com NEW -> 1KW 75VDC Gecko power supply kits















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