I really hope this wasn’t already posted. I checked so…here goes.
Did anyone use a gearbox last year that was configured to use 3 motors? Essentially creating a six-motor drivetrain?
The mentor from our team remembers seeing someone with this setup, and we’re trying to figure out if it would work.
How well does it work? Would it be a noticeable enough improvement over a two-motor gearbox to make it worth the extra effort?
Does anyone know of any suppliers (Andymark, Banebots, IFI, etc) that offer a configuration like this?
The maximum number of motors you can use this year is not 8! It is the total number of motors in the kit plus the extra 2 cims.
Remeber folks we have, Fisher Price motors, Small cims, Big cims, Bane Bots, Window Motors, Muchabi,
As for the 3 motor drive teams have done it from time to time. If I was going to do that this year I would most likely use 2 small cims and the AM FP planetary.
That appears to be the case, even though 57 recieved 2 FP motors in our kit. I’m slightly miffed at the lack of matched motors in the kit aside from the CIMs and the (much) weaker globes and window lifts.
There’s another thread around here where basically everyone confirms that they got two FPs. This leads me to believe that it’s a typo in the checklist, and not a mistake in packing. I’m sure this will be covered in Team Update 1.
We get 2 FPs this year. Expect the clarification to come soon.
The picture on this thread looks like it was taken from our 2005 robot. We used this exact gearbox housing (the big aluminum thing) last year and we will use it again this year (check out rule R20 or R24 regarding reusing parts … best rule ever!) We will use the 2 CIMS and FP (as shown in the picture). Basically, we will make all new parts except for the housing and use the new motors. The best thing about the FP motors is that even when they change the motor speed, they keep the center distance requred to the mating gear the same. This year they have 19 tooth pinions so I change the gear that mates to it and my speed matches perfectly!
By the way, there are 15 motors available to us this year. 12 are included in the kit and 3 can be purchased in addition (2 CIM and 1 mini-bike).
6 down and 9 more to go!
The reply to the question regarding output is as follows:
The total gearbox output equation is as follows: TorqueOut = (-63.89/426)*AngVel + 63.89
AngVel is in RPM and Torque calculated is in N*m.
Stall torque is 63.89 N*m and free speed is 426 RPM. Maximum power is 712 Watts.
The gearbox was connected to 6 inch wheels. It is a custom gearbox, but I will make available the drawings and solid models to those who request it.
I missed the kickoff and am trying to catch up. I assume we have a humongous new battery (or small nuke) to power all these 15 motors for days on end, right?
