Pager motors: Removing weight and driving wheels
I am currently working volunteerily at a local school, teaching young kids a bit about telescopes and astronomy.
One topic I am currently planning is the mars rover(s) and I am planning on building a simple line follower as activity.
As the budget is very low but I still want the kids to be able to build something to take home I am trying to keep it as simple as possible.
After I ordered a pager/iphone motor a year back or so, I now ordered 100 vibration motors for $28.50 at aliexpress.
They work fine but are smaller then the one I had before, a rubbery encasing makes them the same form factor.
http://www.ringohr.de/tmp6//motorbadpic002.jpg (excuse the horrible pictures, I just have a older android phone)
The first problem is removing the weight.
I have searched and found several tutorials (for example http://www.robotroom.com/TinyMotor.html) and aproaces, heat and regular pliers failed, for everything else I lack smaller tools.
I consider ordering those grip pliers here in germany, which one would be better?
I also considered a watch wrist band tool as I have only a limited set of tools,
But I don't think I can adapt them to hold the motors.
Any other tricks?
The second problem is to drive small wheels with those motors.
With the vibration weight attached I can't drive a small foam or cardboard wheel, neither via friction nor a rubber band/belt.
I hope it will work once the weight is off.
I hope I can solve this issue, else I am stuck with 100 motors that are only suitable for bristle bots ;-)
The vibration is strong enoug to move something, also attaching the motors to a cardboard square and directly touch the ground seems to have enough power.
I could use a 3d printer to print a gear, but I would like to keep it as simple as possible.
Also the groove bearing + shrink tube drive I have seen on another project would not be ideal to build with younger children.
I initially was thinking of using bottle caps as wheels and wrap the motor axis with shrink tubing or isolation tape to drive the bottle cap by friction.
Thanks for any ideas, advice or suggestions!