what motor did you use(arm)

[evanisthat!]

108 used a globe motor on a 1.75:1 rack and pinion assembly to control the telescoping part of the arm and the other globe motor on a 30:1 worm gear reduction to rotate the arm. Although it was pretty slow, it was controllable and reliable. In fact, the arm assembly never failed through 3 competitions, it just never worked great to begin with . Hope this helps.
-Evan

[Aren_Hill]

Which arm? our first telescoping 1 used a fischer price through 64:1 42mm banebots. the second 1 used a globe motor with 2 sprockets and the rebuild of the second one now uses the fischer price through a lead screw it works amazingly well

[MrForbes]

1726 used the small Banebots motor and a 125:1 Banebots gearbox. this drives an 8:1 chain reduction, and the arm is mostly supported by a gas spring. it worked all season, and is still working (they're playing with autonomous programming now).

AJ R--I'm not at all surprised that you're having trouble with the 56mm Banebots transmission...think about what you are doing to it, you are driving it with a gear reduction motor that can put out way more torque than the transmission is designed to handle.

[Tim Baird]

Gael Force used two FP motors this year, one for the lift and one for the extension. Both powered a ball-screw through repackaged FP trannies. The extension simply slide back and forth on bearings while the lift worked through a sliding four bar linkage.

[RyanN]

364 used the small banebots gearbox with the default motor (mabuchi?), and we used a globe motor for our extension.

[IndySam]

we used an AM Planetary Cim gearbox at 181:1. The arm can lift the whole robot.

[Billfred]

Our first stage was a CIM and a 12:1 BaneBots gearbox, reduced another 1:3 (as I recall) through chain to the actual arm. The second stage alternated between a Denso and Keyang motor, although we never quite nailed that.

[Herodotus]

We used two Fisher price motors to move our two jointed arm, and then used a globe motor to rotate it and a window motor to open and close the claw. The problem with using a globe motor for the rotation was that it had no backdriving on it so we eventually broke the gear that was on the arm and had to lock the arm rotation half way through Curie.

[Dan Petrovic]

One FP Motor (without original FP transmission) on a 64:1 BB transmission driving a 40:1 worm gear assembly for both the base and the arm.

BB RS540 motor in the 64:1 BB transmission that came with the kit for the wrist.