YAMAHA SCARA-Robots - Technology

The most distinctive feature of our SCARAs is a completely beltless structure. The tip rotation axis is directly connected to the speed reduction gear. High-rigidity, high-speed, and high-accuracy. 01 Internal structure achieving the high-rigidity and high-accuracy. 02 Completely beltless structure A totally beltless structure was achieved by using a ZR axis direct coupling structure. This direct drive structure drastically reduces wasted motion. It also maintains high accuracy over a long period of time. It ensure maintenance-free usage for extended periods with no worries about belt breakage, stretching or deterioration with age (feature applies to all XG series models and the YK180X/YK220X). 03 High speed The standard cycle time is fast of course but the YAMAHA design also stresses tact time in the actual usage region. A drastic improvement in maximum speed was made by changing the gear ratio and maximum motor rpm. This also resulted in a better tact time during long distance movement. 04 Compact Changing the cable layout made the overall cable height lower than the unit cover. Also, utilizing a motor with a small overall length and extrusion material base yielded the smallest dimensions among equipment in the same class. 05 Zone control (=Automatically sets the maximum acceleration/deceleration) function On SCARA robots there is a large difference in the load applied to the motor and the speed reducer depending on whether the robot arm is folded or extended. YAMAHA SCARA robots however can automatically set an optimal maximum acceleration and deceleration using the arm status when starting operation and the arm status when ending operation. This capability means that just entering the initial payload will prevent the robot from exceeding tolerance values for motor peak torque and speed reducer allowable peak torque. So full power can be extracted from the motor whenever needed and a high level of acceleration/deceleration maintained. 06 Hollow shaft and tool flange options are selectable Useful options include a hollow shaft for easy wiring to the tip tool and a tool flange for tool clamping. *YK250XG/YK350XG/YK400XG/YK500XGL/YK600XGL Arm lenght: 120 - 1200 mm Max. payload: 50 kgs Max. speed: 7.6 m/s Gear type: direct, beltless