M100RAK Robotic Arm Kit User Guide

RobotShop Inc. www.RobotShop.com
Dimensions
Default configuration:
• Bottom of base to shoulder axis: ~9.5cm (~3.75”)
• Shoulder axis to elbow axis: ~24.4cm (~9.6”)
• Elbow axis to wrist axis: 32.5cm (~12.795”)
• Maximum horizontal reach (base rotate axis to wrist rotate axis): ~60cm (~13.35”)
• Maximum vertical reach: ~69.4cm (~27.32”)
• Weight: 1.2 Kg
For exact dimensions, we suggest measuring your assembled unit as the tube length may vary
slightly for each kit.
SPG785A-5.0 Power Gearbox
The SPG785A-5.0 Servo Power Tube Gearbox is built to use a stock HS-
785HB servo which, unmodified, can provide 1260 degrees of total rotation
(version shown includes optional nylon/metal gears). When the HS-785HB
servo is installed into the 5:1 power gearbox, the rotation is decreased by a
factor of 5, providing 252 degrees at the final output shaft. Similarly, the
power and accuracy is increased by a factor of 5. Position feedback
remains since the internal potentiometer is not removed. The SPG785A-
5.0 can handle tremendous side loads with the dual ABEC-5 precision ball bearing supported
hardened 3/8” stainless steel hollow shaft. The shaft is hollow to allow wires from cameras,
sensors or other devices to not tangle during multi-turn rotations. The frame of the SPG785A-
4.5 is machined from 6061-T6 aluminum (anodized) and offers a standard hub pattern inline
with the output shaft.
 Weight with servo: 7.1oz
 Rotation: 252 degrees
 4.8V power: 765 oz-in
 6.0V power: 915 oz-in
 4.8V speed: 1.40 sec/60 degrees
 6.0V speed: 1.15 sec/60 degrees