Home made
Spindle RPM counter
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Programmable universal counter made out of a kit (the housing is home made)
Overallview of the stroboscope on the spindle pulley of the drill/mill
Home made stroboscope on the PC and glued on the lower pulley rim.
There are 120 strokes which the cell interface divides by 2 and then the counter counts for one second showing the RPM of the spindle.
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