Re: [CAD_CAM_EDM_DRO] A little bit of help; Always works!!!

Paul wrote:

> Hi Anthony
>
> Servo motors get to be very expensive - Add the cost of power supplies, servo
> amps, and suitable computer interface card, £1000 and up.

Well, yes, if you select top of the line AC servo motors and drives, they are VERY
expensive. If you can be happy with DC brush motors and older servo amps, they
are much less expensive, even new, and can be had quite cheaply surplus. There
are tons of old computer tape drives and other machinery that are scrapped, and these
type of motors can be found in them.

>
> The corresponding budget using stepper motors can be as low as £100 depending
> on the size of the machine you are controlling. http://www.magenta2000.co.uk
> has some small steppers. I have the MD24 that I used on a small HMC/Lathe with
> 3:1 belt drive. Now that I have some Gecko drives, I'll be using them on
> another project (the compucut stuff is now surplus).

Large steppers and drives are also expensive. I truly believe that if you know where
to look, a servo system appropriate for a Bridgeport-size machine can be had cheaper
than appropriate steppers. This is most likely NOT true for a Sherline size machine, as
suitable steppers are VERY common in appropriate sizes for these machines.

Jon