The MOTOMAN-VS50 is the world's first spot-welding robot with a seventh rotational axis (E-axis) in the lower arm.
This seventh axis increases the degree of freedom. The robot arm can easily move around the workpiece, can change its posture freely while keeping the spot welding gun in its optimal position, and can maintain a low welding posture.
With mutual interference reduced, the MOTOMAN-VS50 can be installed in close proximity with workpieces or other robots. It can also easily reach into low, narrow spaces, eliminating the need for a pit. And, with the robots working in high-density lines, the welding processes can be integrated.

･Adjustable posture to reach low position

The MOTOMAN-VS50 has a 50-kg payload and repeatability during positioning (±0.1 mm). Its motion characteristics are dramatically improved by the increased degree of freedom achieved by its 7-axis control, by its enlarged motion range with a maximum reach of 1630 mm, and by its high motion speed.
Also, Yaskawa has developed an ultra-small and lightweight spot welding gun for the MOTOMAN-VS50. Although it is incredibly small, this new welding spot gun has a welding pressure equivalent to that of a standard spot welding gun. Yaskawa's developed ultra-small and lightweight spot welding gun reduces difficulties with interference, enables high-density welding lines, and improves work productivity.

MOTOMAN-VS50 with ultra-small, lightweight spot welding gun (Max. welding pressure: 5880N)

Robot Name MOTOMAN-VS50 Payload 50 kg Repeatability ±0.1 mm Maximum speed S-axis (Turning) 2.97rad/s (170°/s) Motion range S-axis ±180° L-axis (Lower arm) 2.27rad/s(130°/s) L-axis +125° to -60° E-axis (Elbow) 2.27rad/s(130°/s) E-axis ±170° U-axis (Upper arm) 2.27rad/s(130°/s) U-axis +215° to -35° R-axis (Wrist roll) 2.27rad/s(130°/s) R-axis ±170° B-axis (Wrist pitch/yaw) 2.27rad/s(130°/s) B-axis ±125° T-axis (Wrist twist) 3.49rad/s(200°/s) T-axis ±180° Mass 640 kg

Standard Specifications of MOTOMAN-VS50

All driving axes in the MOTOMAN-VS50 from the E-axis on the lower arm to the T-axis at the end of the arm, use Yaskawa's innovative, compact actuators with hollow shafts that contain built-in gear systems. The driving cable for the actuator, hoses for cooling water and connectors or terminals for gun motor and welding power supplies for spot welding can all be accommodated in the robot's upper arm.
This innovative design eliminates the need for extra space for cable and hose movement, reduces interference with robots and workpieces, and decreases cable and hose wear. In addition, it enables welding lines with high-density layouts and easy operation.

Compact actuator with hollow shaft