Re: cheap high speed servo control

A 100 line encoder would give you 400 steps per revolution and a
maximum speed of 37,500 RPM (with a suitable motor).

Mariss

--- In CAD_CAM_EDM_DRO@y..., "Graham Stabler" <eexgs@n...> wrote:
> I am currently designing a coil winding machine for small hot air
bonded
> bobbinless coils, one thing I would like is a servo motor as the
spindle
> to allow good speed control as well as angular control at the start
of
> winding. i.e. I want to be able to drive it quickly (up to
3000rpm) and
> then use it more like a stepper motor during wire attachment etc.
>
> The gecko drive units look good but would I be correct in assuming
that
> the servo could not be run at speeds as high as 3000rpm? The max
step
> rate is 250khz so I suppose it depends on the encoder.
>
> Are there any other fairly cheap drivers that might allow me to
drive
> the motor both at high speed and in step mode? I will probably run
the
> machine from a microprocessor which will be given winding constants
(no.
> of turns etc) via a pc link.
>
> Sorry if this is as clear as mud.
>
> Graham Stabler