On 11/01/2011 4:52 PM, Andrew wrote:
2011/11/2 Dave <[email protected] <mailto:[email protected]>>
>
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.
Yes, this is an IMPORTANT point. And, if the encoder electronics
loses track, it will almost certainly cause a servo runaway!
Jon
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