M100RAK Robotic Arm Kit User Guide
RobotShop Inc. www.RobotShop.com
Applications
Robotic arm: With the addition of a gripper, a standard robotic arm can be used for many
different projects, from doing routing assembly tasks, to playing chess and ever defusing an
explosive device.
Camera mount: The basic arm includes a 90 degree metal mounting plate which can, without
any modifications, be used to mount a standard sized camera.
CNC machine: Mount a handheld router and create a manual or CNC controlled router arm.
Note that we suggest using a flexible shaft extension to minimize the weight at the end of the
arm.
Scale Human Arm: The length of the shoulder joint to the elbow joint is almost the same length
as an adults humerus bone, while the length from the elbow to the wrist joint is almost the same
as an adults Ulna. There are two degrees of freedom missing in the arm to make it match that
of a human: a rotation joint within the “humerus” and a rotation joint within the “ulna”.
Specifications
General
• Four degrees of freedom with 252 degrees of rotation possible at each joint
• Metal power gearbox frame made from 6061-T6 aluminum (anodized)
• Tubing used is 5/8” outer diameter hollow aluminum (6061-T6) with a wall thickness of 0.028”
• Hitec HS-785HB Winch Servo Motor used in each joint
• Servo casing is water and dust tight and features Karbonite gears and ball bearing drive
• 5:1 gears increase torque of each servo motor by a factor of 5
• Dual ABEC-5 Precision ball bearings support each hollow steel shaft.
• Hole pattern uses 5-40 tapped screws
• Operating voltage: 4.8 to 6V (6V suggested for maximum torque).
• Current: 1.5 to 1.8A per motor depending on voltage used.
• Several lengths of tube included for different arm configurations
• Dimensions: variable depending on the configuration.
• Weight: 1.20Kg (not including electronics or gripper/end-effector)