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Unread 21-07-2014, 22:28
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Re: Linear Actuators

Quote:
Originally Posted by JamesTerm View Post
So I have a question for everyone who has used the lead screw technique. How did you do a set point operation... like if you want it to go a certain distance? Did you:

1. Use an encoder?
2. Use a potentiometer?
3. Use a limit switch?
4. String potentiometer?
4. Something else?


If you used an encoder how do you ensure it remains calibrated (e.g. limit switch). I'd like to use this lead screw technique, but I haven't found reliable way to sense distance. (I have not tested the string potentiometer either).
We prefer string potentiometers for our linear actuators. Quite simply, they are the easiest sensor to implement, and they are accurate enough for nearly every FRC application.