Hi Guys,
I currently have a slotted disc with a opto sensor to measure the rpm of a spindle on a mill.
As of now the rpm is measureing correctly, however It reads rpm up to 2340 . How do i calculate what size disc and slot I would need to measure up to 5000 rpm. I currently am using a 4 inch disk with a .375 slot. What are the limiting factors, formula for calculating the range of the rpm being sensored with respect to disc diameter and slot width. Would I be giving up the low range to accomplish a higher sensored rpm.
Thanks Joe