The MOTOMAN-EA1800N is a new and high-payload model robot with the payload increased to 15 kg from the 3 kg of Yaskawa's conventional robots for arc welding. Large torch cables can be easily accommodated as a result of improved wrist rotational inertia and moment capacity, enlarged inside diameter of the wrist, enhanced power of all-axes drive motors and speed reducer on the wrists (wrist roll and wrist pitch/yaw) and higher rigidity design for the entire manipulator.
This high payload enables the use of a water-cooled torch for continuous welding in higher current ranges, a servo torch with a high-precision welding-wire feeder or other devices, and a special large torch.
Lasers and cameras or other sensors can also be easily mounted.

Model MOTOMAN-EA1800N Payload 15 kg Repeatability ± 0.08 mm Max. Speed S-axis (turning) 3.40 rad/s (195°/s) Range of Motion S-axis ± 180° L-axis (lower arm) 2.96 rad/s (170°/s) L-axis +155° to -100° U-axis (upper arm) 3.05 rad/s (175°/s) U-axis +210° to -175° R-axis (wrist roll) 5.93 rad/s (340°/s) R-axis ±175° B-axis (wrist pitch/yaw) 5.93 rad/s (340°/s) B-axis +180° to -45° T-axis (wrist twist) 9.08 rad/s (520°/s) T-axis ±200° Approx. Mass 380 kg

With a water-cooled torch

The motion speed of the robot turning axis is 15% faster than Yaskawa's conventional models. The EA1800N has the fastest major axes (turning axis, upper arm axis, and lower arm axis) in its class.
With this increased axial speed, air cut time (motion time of robot while not performing welding) can be reduced by 10%^* for improved production efficiency. Greater improvements can therefore be expected when welding workpieces, such as large ones with many welding points or broadly spaced points that entail a large number of air cut times or greater distances.

*: Compared with Yaskawa's conventional models in specific motion patterns

This new robot maintains the same structure and functions found in all robots optimized for arc welding. Because the welding cables and hoses are built in the upper arm of the robot, the problem of cables and hoses interfering with the robot, peripheral devices, or workpieces is eliminated. Also, multiple robots can be operated with their arms positioned in close proximity to one another.
This design enables the arm to enter even intricately shaped or tight spaces and perform welding. It contributes to the extended service life of the cables and hoses as well as the enhanced efficiency of the work space.

Cables in the arm	Multiple robots in close proximity	Robot arm in narrow space

With the torch cable built into the robot's upper arm, bending of the cable is minimized and the welding wire has a lower tendency to bend. This prevents the welding wire from deviating from the center at the end of the torch. Therefore, the weld quality is stabilized with no deviation of the weld line. This design also contributes to the improved durability of the welding wire and stable wire feeding over a long period of time.

With cables built into arm	With cables outside of the arm