Arm

Reachy's arm specifications

Weight repartition

  • Overall Arm: 1670g
  • Shoulder: 240g
  • Upper arm: 610g
  • Forearm: 590g
  • Gripper: 230g

Maximum payload: 500g

Of course, this may really vary depending on the holding and duration configuration.

Degrees of freedom

Reachy's arm offers 7 degrees of movement + 1 for the gripper

Motors of a Reachy arm
Right Arm

Motor nameAngle limitsMotor ID
shoulder_pitch-180, 9010
shoulder_roll-180, 1011
arm_yaw-90, 9012
elbow_pitch-125, 013
forearm_yaw-100, 10014
wrist_pitch-45, 4515
wrist_roll-45, 4516
gripper-69, 2017
Left Arm

Motor nameAngle limitsMotor ID
shoulder_pitch-180, 9020
shoulder_roll-10, 18021
arm_yaw-90, 9022
elbow_pitch0, 12523
forearm_yaw-100, 10024
wrist_pitch-45, 4525
wrist_roll-45, 4526
gripper-69, 2027

Standard version

Animated by the following motors:

  • 1 Dynamixel MX-106T
  • 3 Dynamixel MX-64AT
  • 1 Dynamixel MX-28AT
  • 2 Dynamixel AX-18A

Performance version

Animated by the following motors:

  • 3 Dynamixel MX-106T
  • 1 Dynamixel MX-64AT
  • 2 Dynamixel MX-28AT
  • 1 Dynamixel AX-18A