(Read 492 times)
Jun 04, 2011, 03:11 am
I have a winch drum rotating with 3500rpm. I have been thinking about using an old mouse as an encoder, since it is easy to make slots in the end plate of the winch drum. How high speed can a mouse handle, and how is it to interface it into arduino. Or is it other solutions which are better?
Location: Boston area, metrowest
Author of "Arduino for Teens". Available for Design & Build services. Now with Unlimited Eagle board sizes!
Jun 04, 2011, 03:30 am
3500? almost 60 Rev's per second? Crankin'!
I think making a no contact sensor that puts out pulses you can measure would be better, or to create an analog voltage that you can analogRead would be better.
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.
Location: Central MN, USA
Phi_prompt, phi_interfaces, phi-2 shields, phi-panels
Jun 04, 2011, 05:29 am
You could attach/embed a powerful rare-earth magnet on the rotating part if that is possible and pick up the magnet with a hall effect switch or a solenoid. I heard that is how some car engines control ignition. This way there is no contact.
Most persistence of vision displays use this technique but they're not near your speed, possible less than 10rev/s. Your magnet needs to be bigger but the parts are like $2 total so you may as well give it a try.
Serial LCD keypad panel
phi_prompt user interface library
Jun 04, 2011, 11:34 am
So can I use sth like this:
60rps with a drum diameter of 60mm gives me 11m/s, was thinking about have a pulley on the other end to double the force so the actual winching speed will be 5m/s.
How is it wit reflective tape and sensor in something that is gonna operate outside?