Re: 201 Drivers and 42 Motors

It must be the sign of a demented mind replying to one own post but
we now have Mariss interested in building a larger 160v servo drive
which is probably the best way to go.
However as someone else posted there are loads of older [read very
cheap ]machines out there still on type 42 stepper motors in good
condition just looking for drivers.
As this list has some very experianced people on it could we have a
definitive answer as to whether a smaller stepper drive such as the
201 could run larger motors through an amplifier stage?
This is one part of my original post quoted below that never got
addressed.

--- 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