Re: 201 Drivers and 42 Motors

John,

Good evening. It just so happens Darrell and I had an extended phone
conversation this evening on this very subject where he made a very
persuasive case for a 160-180VDC drive. So much so that I will be
seriously investigating the feasabilty of building such a drive. I've
asked Darrell to give me input for what is required regarding
existing power supplies and motors. Any other comments and
suggestions from others as well would be welcome as well.

Mariss

--- In CAD_CAM_EDM_DRO@egroups.com, John Stevenson <machines@n...>
wrote:

> I have been following this thread with interest and have read

Mariss's and

> Darrell's input.
> What I gather Darrell is trying to do is to use the 201 drivers

with the

> original Bridgeport power supplies. As the 201 is limited to 80volt

this

> creates problems as the origin machine supply is a lot more than

that. To

> replace the transformers is quite a costly operation and this is

what some

> retro fitters are trying to avoid.
> I'm not an electronics guy at all but it appears to me that perhaps

it's

> possible to use Mariss's 201 driver at say 50v which is well within

it's

> capabilities and them put the output through an amplifier stage

powered by

> the machines own transformer.
> It's possibly not as simple as that but it may be a more economical

way

> than to either use old original suspect boards or source more

powerful

> boards.
> Any input on this? Mariss, Jon ??
> --
>
> Regards,
> John Stevenson
> Nottingham, England