Re: [CAD_CAM_EDM_DRO] Re: Sherline Problem

At 01:03 PM 11/8/2007, you wrote:

>You only need one pulse for threading. This is well established.
>I recommend putting another type of phototransistor on the spindle, a
>reflective one.
>Then paint one small reflective stripe on the spindle.

Another sensor is the Allegro ATS series (see
http://tinyurl.com/229gtv ) which are under $5.00 and can be 2.5 mm
away. Simply put a screw into the pulley and sense it! Of course if
you have a gear available, you get as many pulses as teeth.


David G. LeVine
Nashua, NH 03060


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