Lathe: Bike Computer Tachometer

Please read the complete article:
http://benchtopmachineshop.blogspot.com/2017/04/lathe-touchdro_12.html


After testing, it appears that most bike computers lose a lot of accuracy over 1,000 RPM. I suspect this is probably because the reed switch used to sense the magnet simply can't operate that fast.

I had been planning on installing bike computers on both the mill and lathe, but the 1,000 RPM limitation doesn't make it worth my time since a lot of my cutting it done on aluminum which uses speeds often well over that.

As of now the plan is to continue using my non-contact laser tachometer and I'll mark graduations around the speed control knob. Crude, but it should be effective enough.