2011/11/2 Dave <[email protected]>
> On 11/1/2011 6:50 AM, Andrew wrote:
> > Hi,
> > Anyone can share the source of inexpensive linear scales/encoders? I'm
> > looking for 5-10um resolution, quadrature is better as I plan to
> > connect them to MESA 7i39. BTW, how can I connect encoders with
> > differential output to 7i39?
> > Thanks and best regards,
> > Andrew
> >
>
> Be careful as some of the inexpensive linear scales do not advertise
> their maximum slew rate or update rates. If they lose track of their
> position during a rapid, how will your control system react?
>
> Some of those linear scales were designed for linear measurements on
> manual machines. They were never intended to be part of a closed loop
> control system.
>
> Dave,
Thanks, I will.
There are some cheaper encoders, but their max speed is limited to 1m/s,
not enough.
And there are very cheap, they're only for DRO.
I already think that ~ $500 per axis is inevitable expense here.
Andrew
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