DEWBOT XVIII Arm
Due to the long reach required to score (especially CONEs) on the Top ROW, CHARGED UP seems to be a classic Arm Game. Nice change, but Sab-BOT-age has built only four Arm Robots to-date. These were:
DEWBOT I - Triple Play - 2005
DEWBOT III - Rack 'n Roll - 2007
DEWBOT VII - Logomotion - 2011
DEWBOT XIV - Power Up - 2018
The centerline of the Top ROW CONE NODEs are 3' 3-3/4" from the GRID front. Add 3-1/2" for bumpers and 2'1/2" for the radius of our rotating paddles and you are just shy of 3' 10" when the paddle centerline is directly above the CONE NODE centerline. Maximum extension is 4' beyond the frame perimeter. This requires either a 2-axis Arm or a 1-axis Arm combined with a directionally extending lift. Sab-BOT-age picked the 2-axis Arm without extension.
We defined the following terms in talking about the Arm:
- Shoulder - The rotational axis on the Chassis. The Shoulder is driven by the Shoulder Gearbox
- Humerus - The Arm section extending from the Shoulder, terminating at the:
- Elbow - The 2nd rotational axis, used to articulate the:
- Radius & Ulna - A pair of structural elements terminating with the Monkey Claw
The Elbow is driven by the Elbow Gearbox.
Structural
The Shoulder mount comprises a pair of 1/4" Al Shoulder Mount plates each with a (1/2" Hex flange) bearing which together support the Shoulder Axle. These Shoulder Mount plates are securely bolted to a 2" x 1/8" wall square tube running longitudinally along the chassis's axis.