Thread: Encoder for Spindle RPM
Does anyone know of a source of encoders suitable for spindle rpm / direction measurement. It'll be interfaced with a MESA 7i43 card and EMC 2
If you want speed only, a simple reflective opto-switch will do. If you want speed and direction, you will need something that outputs in quadrature. This can be as simple as two photo-interruptor switches spaced around a slotted disk. If there are metal parts involved (i.e. a gear), Hall effect switches are good.
Search for 'incremental encoder' to see a wide variety of what is available as a package deal. Apart from the expense, the hard part with these is mounting them properly concentric with your rotating shaft as well as finding something that won't obstruct whatever hole you require through the spindle.
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