My team is trying to figure how to connect a 12V DC motor to 220 mm tetrix tubes listed below so that it would stay attatched and still rotate
http://parts.ftcrobots.com/store/detail.aspx?CategoryID=162&by=9&ID=6315&c=1&t=0&l=0
can someone please share their ideas/opinions about this? thank you in advance
i dont understand your issue. why have you already tried that isnt working?
If you are using the tube as a drive shaft for the 12-volt motor my advice would be to give up and try something else. The ends for the tubes aren’t really suited to torsional forces. We’ve attached them to the servos with some success, but not the big motors.
You might try a chain drive on those tubes. I saw teams use the tubes as rollers quite effectively at the Richmond event last weekend.
You can drill out the threads on the motor hub and then bolt the motor hub directly to the tube clamp.
Patriot,
If you are only going to require the tube to move a few turns in one direction and then the other, you can pre load the wire so that it has enough length when it is at the midway point to turn in either direction. You must limit the rotation so that you do not exceed the length of wire. You can also run the wire down the inside of the tube. The PWM cable can stand a fair amount of rotation over the full length of the tube without failure. Perhaps as much as +/- 5 turns especially if you use an extension PWM cable. Please remember that you can use surgical tubing to hold the wire out of the way if needed, up to the specified size please.
If you require continuous rotation, then I will have to think about it for a while. Nothing in the rules that I can think off would allow you to continuously rotate the tube. If you would care to PM me, I might be answer better off line so that you don’t give away your strategy.
connect a tube clamp to the structural tubing and then connect a motor hub to the tube clamp then the motor shaft can be slipped into the motor hub and it’ll spin as you want.
TUBE-TUBE CLAMP-MOTOR HUB - MOTOR
Dont forget to put a tube plug in there for more support
That Tube Plug seems pretty useless.
We tried using them, and even when we clamped down hard on the tube with the tube clamp, the plug was still loose and just fell out the end.
Did we do something wrong?
I would have assumed a tighter fit.
Phil.