Precise positioning of semiconductor wafers during SCARA assembly operations requires instantaneous braking and holding power while minimizing heat in the system. The latest compact and slender Miki Pulley BXR-LE brake models provide the needed perfectly controlled braking in a confined area of the system using minimal power.

Cycle time is critical in semiconductor assembly. The BXR-LE braking response and holding power makes it ideal for these high-speed applications. The Miki Pulley BXR-LE brake is a power-off engaged brake that holds a semiconductor wafer in place. For subsequent operations, the brake is energized which disengages the rotor disc for the next assembly operation. The BXR-LE brake uses 24 VDC for a split second to overcome compression spring inertia to open the brake, then consumes only 7 VDC by utilizing the BEM power control module. 

Because these semiconductor assembly operations are fully automated for long-term operation, dependable, maintenance-free braking is essential for their uninterrupted operation. That is where Miki Pulley’s BXR-LE brakes excel for semiconductor assembly as well as bio-med and packaging applications using SCARA automation.

When compared to most other electric brakes, the BXR-LE design provides just one-third power consumption and heat generation in one-half the overall size thickness.

Specifications are:

• Maximum RPM: 6,000

• Static friction torque range: 0.044 ft.lb. to 2.36 ft.lb. (0.06 Nm to 3.20 Nm) 

• Ambient operating temperature 14°F – 104°F (-10°C to 40°C)