Hi Richard
EMC/STG will work just fine with only encoder feedback. In
fact
most cnc controls work this way.
The advantage of using both encoder and tach is that extremely
slow
speeds (where the encoder pulse rate is low) can be
smoother.
In normal metal cutting feed rates this is not much of an
issue though.
Les
Leslie Watts
L M Watts Furniture Tiger, Georgia USA http://www.alltel.net/~leswatts/wattsfurniturewp.html engineering page: http://www.alltel.net/~leswatts/shop.html |