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View Full Version : [FTC]: Attaching Tetrix to LEGO motors.

ttldomination
22-01-2009, 17:35
Hello,

My Team has recently been trying to think of ways to connect the LEGO motors to the Tetrix axles and elements.

We figured out that the LEGO connectors thread into the Tetrix screws and that works well, but we are not too excited about that option. It seems kind of dangerous, and not too strong.

Plus we were trying to get a direct connection to the Orange holes with the FTC screws.

Does anyone have any suggestions?
emmell
23-01-2009, 00:33
Two of the holes in the LEGO double-beveled gears align nicely with the holes of the TETRIX gears. Attach the LEGO gear to the motor using an axle. Use a long screw sticking out through the gear into the TETRIX gear. Attach a nut on the other end of the screw (might need some spacers or other gears in between as well).
Rick TYler
23-01-2009, 10:37
The square Vex axles are a perfect fit in the Lego motors. At least this gives you a steel drive shaft to which you may attach other mechanisms. We've used this to create a windlass for a couple of applications.
ttldomination
23-01-2009, 18:03
Hm...

Mr. Lowe, I like the idea with the gears, but I'm not a fan of the LEGO shafts, and yet, we can use the VEX shafts, RICK TYler, I think i'll throw those 2 together and see what I get.

Thankx.
PhilBot
23-01-2009, 21:19
The square Vex axles are a perfect fit in the Lego motors. At least this gives you a steel drive shaft to which you may attach other mechanisms. We've used this to create a windlass for a couple of applications.

I hadn't seen square axles. Are they FTC legal?
Rick TYler
23-01-2009, 22:13
I hadn't seen square axles. Are they FTC legal?

Yes:

http://forums.usfirst.org/showthread.php?t=9717 , post #12:

Q: Other components of the VEX kit were not addressed in the game manual. More specifically I am inquiring about the long shafts, omni wheels, tank treads, and the intake rollers.

A: Per rule <R5b> only Vex metal and fasteners may be used. The square shaft is legal but the wheels, treads and rollers you described are not legal and may not be used on a robot during competition.

The only "square shafts" in Vex are the axles.