Help! Turning a worm gear to a specific position!

Lynxmotion
1

Hello all,

I’m new to the forums and have very limited, if any, knowledge of robotics and servo/motor control. I am looking into this for a computer mod I’m doing. Basically, my question is how would I go about turning a worm gear from a starting position to an end position each time the computer turns on. And for the worm gear to turn back when the computer shuts off. I understand that the on/off part is very similar to this post here lynxmotion.net/viewtopic.php?t=2710 but can a servo turn a worm gear multiple rotations forward/backward and hold its position for long amounts of time?

I was looking at dc motors but I am not sure I can control position very easily. I’ll appreciate any recommendations.

edit: also if this is in the wrong section of the forum please tell me.

2

You can use a servo to turn a worm gear.

You would use a continuous rotation servo and a 10 turn potentiometer. Requires a microcontroller to send commands to the servo and read the analog value of the pot. Similar to what I did here.

viewtopic.php?f=11&t=5699

3

it might also be simpler to use a standard servo and just gear it so that you can get the rotation needed if you are a beginner, and the extra loading won’t mess you up. depends on the amount of rotation you are looking for. Just stick a big gear on the servo and a small one on the worm gear.

edit: looking at the other post that’s probably way too much gearing to be practical