Society of Robots - Robot Forum
Mechanics and Construction => Mechanics and Construction => Topic started by: garriwilson on July 12, 2007, 03:03:44 PM
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In my servos, the slot for the pot in the main gear isn't separate from the gear. I don't have a dremel or a drill and my parents are going to give me any more money to buy one. :'( Any other way I could do that step to make the slot round?
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one solution would be removing the pot and replacing it with resistors if you have a soldering iron.
Hmm... you could also cut the pot shaft , center the pot and melt the rest so it stays firm. (I've done that with hs-311)
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Sorry I'm a noob could you like give detailed instructions if it's not a problem for you?
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Hmm I don´t have a detailed tutorial but there are many on the net. Just look for how to modify a servo for continuous rotation.
You don't need a dremel or drill, just some screwdrivers and an xacto knife , since you can also get the pot outside the servo case without having to melt anything
(http://img440.imageshack.us/img440/6845/img0001uu2.jpg)
Here is a picture of a modified servo with the pot outside the case.
The idea is to replace it with something of a value close to the original that's easier to regulate (many turns, not just 180° like the original).
Just be careful and don't break anything
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So I'm just supposed to take the pot out or replace it with something?
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you can get the pot out and glue it somewhere but the problem is that the pot is very sensitive, so if you have a hot glue gun I suggest that once centered, you fix it with that so it doesn't move.
If you have a soldering Iron you can replace that pot with a "normal" 5k ohm one (if hs-311) because they can be adjusted better and don't move so easily.
Anyways, you don't need a dremel and the steps would be
a) open the servo
b) cut the plastic thing with a knife (http://www.societyofrobots.com/images/actuators_modservo6.jpg)
c) remove all the gears and with a screwdriver, carefully push the motor down (it's glued but it will move with enough strength applied)
(http://img187.imageshack.us/img187/8227/img0013eq9.jpg)
See, apply force between the motor and the case.
d) remove the circuitry and motor
e) unscrew the pot
f) put everything back together and have fun