optically encoded servos?
01-04-2006, 08:43 PM
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optically encoded servos?
I don't know how involved you guys are in the engineering department, but why hasn't anyone come out with an optically encoded servo? It seems like a good idea to me, completely eliminate the resistor pot. Something similar to a computer mouse's optical encoder (the old ball type, not laser or optical), but with more precision. Some telescope mounts use these with a stepper motor to ensure the rate of rotation is even.
[link=http://www.makezine.com/images/02/mousey.pdf]mousebot... picture of optical encoder's hacked for robots[/link]
Another examle:
http://hscience.tripod.com/Atm.html
You can use the optical encoding disk to count the number of digits it deviates from neutral, say, 1024 bit resolution servo. If the servo gear that rotates around falls off by one decimal place, the servo can initiate full power to get back to the proper digit.
[link=http://www.makezine.com/images/02/mousey.pdf]mousebot... picture of optical encoder's hacked for robots[/link]
Another examle:
http://hscience.tripod.com/Atm.html
You can use the optical encoding disk to count the number of digits it deviates from neutral, say, 1024 bit resolution servo. If the servo gear that rotates around falls off by one decimal place, the servo can initiate full power to get back to the proper digit.
