Asm Technology Singapore Pte Ltd

Asm Assembly Automation Limited

Shing Wai Tam

Wai Chuen Gan

Chak Tong Sze

Pei Wei Tsai

Gang Ou

Hon Yu Peter Ng

Wing Sze Chan

Wai Hong Sizto

Chuen Hong Lo

Wang Hay Kenneth Tsui

Sung Yeung

Chunbai Wang

A pick-and-place apparatus has a rotary turret and a plurality of pick arms arranged on the rotary turret for picking up and placing electronic devices during pick and place operations. A transmission stator and a transmission rotor are mounted on the rotary turret with an air gap between the transmission stator and the transmission rotor such that the transmission rotor is rotatable relative to the transmission stator. At least one motor for actuating at least one pick arm during the pick and place operations is operatively coupled to the transmission rotor. The transmission stator and the transmission rotor are configured to transmit data signals wirelessly across the air gap for driving the at least one motor to actuate the at least one pick arm.

Wireless signal transmission in a pick-and-place apparatus

A device sorting apparatusis disclosed herein. In a described embodiment, the device sorting apparatuscomprises a plurality of bin connectorsfor coupling to respective bins for storing sorted devices and a rotary distribution modulefor receiving a deviceto be sorted and for discharging the deviceselectively into one of the bin connectorsto enable the deviceto be unloaded to the respective bin. The device sorting apparatusfurther comprises a sensorcoupled to the rotary distribution modulefor detecting the discharge of the device, and which is rotatable together with the rotary distribution module; and a rotary transformerfor powering the sensor

Device sorting apparatus

A method for damping vibrations in a stepper motor with micro-stepping control which comprises the steps of identifying the force amplitudes and phase shifts of multiple harmonic detent torques of the stepper motor, such as the first, second and fourth harmonic detent torques, and tuning the stepper motor with different current commands until minimum friction and resistive torque are obtained. Thereafter, a compensating harmonic current derived from said force amplitudes and phase shifts of the said multiple harmonic detent torques is injected into a current command during operation of the stepper motor to compensate for torque ripples.

Model-based active electronic damping for stepper motors

Growing community of inventors

Hong Kong, China

Shing Wai Tam