So it is the never ending potentiometer to enable large cnc machines to keep track of position. Such a cool device!
http://www.artbyrobot.com
/ artbyrobot
/ realistic-humanoid-robot
/ artbyrobot
/ artbyrobot
/ www
/ artbyrobot
To send me a one time donation: https://streamlabs.com/artbyrobot
To send me an automated monthly donation: / artbyrobot