Re: new

[Paul <paul.corner-at-tesco.net>]

Hi AJ Hettema

A couple of links to get you going :-
http://www.ktmarketing.com/faq.html
http://206.19.206.56/

Most certainly EMC can be used with encoder feedback with both servo and 
stepper drives. The resolution is only limited by the encoders fitted - If 
you used some of the high end linear scales, sub-micron resolution is 
possible. It is unlikely that your machine tool would be able to position to 
this sort of accuracy, and for a plasma cutter, it is not necessary. Standard 
20 micron scales will give you 0.005mm, and using cheap rotary encoders on 
the end of the feed screws will still give you better than 0.1mm accuracy.

There are a few papers on the usdigital.com web site that lightly cover the 
principals of encoder technology.

Regards, Paul.


On Sunday 14 April 2002 16:30, AJ Hettema wrote:
> I think we can manage it to build such a machine with the documents we have
> on cnc, and the EMC-software (ofcourse we need to feed it with nc-code, but
> that's not such a big problem). What we would like to know is, is it
> possible to build a EMC-machine that's controlling servomotors and has
> something like feedback from the X and Y axis about posistion. Or are
> servomotors accurate enough to reach a 0.1 mm accuracy??? We couldn't find
> a document which describe's the use of encoders to give the exact position
> of the X or Y axis.