RC Brushless spindle

[volcano]

Actually the DTI works perfect. I borrow a second (pro one) from a friend and done some comparative test, so mine DTI works great. A very handy tool :-).
Building housing part is at pause for now , because friend who will do it for me ( i do not have lathe...) is overloaded with jobs at the moment.
Because of that, i decided to use my spare time to build a electronics for my future spindle. So far i figured out how to
make an Arduino speed control. This is a only one video i find so far, that closely matches mine idea.
https://www.youtube.com/watch?v=kYFNUQgE26E
Arduino reads rpms from spindle with an optical sensor, and sends pwm output, so actual rpms try to match targeted one ( take a look at the video).
This " pid " control is not designed to work with ours rc outrunner and ESC.
But there is an Arduino servo library and a bunch of tutorials on how to conrtol ESC with Arduino.
So it`ll be most elegant if i manage to mredge this in one project.
When we cut some mat., spindle will try to maintain the rpm, so torque is improved. :-)
Gain will be big (and dirt cheap) with this speed control.

Early phase of experiment (with salvaged hadware) + Arduino...