Mechanics and Construction > Mechanics and Construction

Servo wheels

(1/2) > >>

Scorks:
Hey! So I'm new to building, and I was had a question. I have two 180 degree servos. I wanted to make functional wheels on a little robot. How would I do this without having to alter the servos by making them do full continuous rotations (since I don't want to mess around with their insides. They were expensive).

jwatte:
You cannot.

Your best bet is to buy a small cheap gear motor and a suitable motor controller.

Th232:
The only thing I can think of is a crankshaft that the servos push back and forth, but that would be a lot more complexity, time, effort and cost than I could ever recommend.

Just do what jwatte suggested and get a different motor.

Gertlex:

--- Quote from: jwatte on December 13, 2012, 11:12:03 PM ---You cannot.

Your best bet is to buy a small cheap gear motor and a suitable motor controller.

--- End quote ---

Or buy two cheap HS-311 servos and modify them.

Pogertt:
In this link  http://en.wikipedia.org/wiki/Steam_locomotive#Steam_circuit  Please scroll down to Steam Circuit.  The article explains how the pistons are connected to the drive wheels, with the piston connecting link arms being 90 degrees out of phase.
The out of phase scheme is used, because if the rods were connected at 180 from each other, and the wheel stopped at TDC or BDC, there would be no way to get them moving again without push from another engine.

The programming of the 2 servo control pulses might be challenging, but not an impossible task.

The easiest way may be to use a look-up table to find the two positions the servo arms need to be in to generate rotary motion.


 







Navigation

[0] Message Index

[#] Next page

Go to full version