The Uncontrolled Ball Shell Rotation Caused by the Keypad
Shortly after the delivery of the 4300 units, both the devices in our possession and those in the hands of users began experiencing an issue where the ball shell would rotate uncontrollably. Initially, we disassembled and analyzed the devices, conducted component-by-component investigations, and narrowed down the problem to the keypad. Upon scrutinizing the components on the keypad individually, we discovered that a specific chip had burnt out. Replacing this chip resolved the issue. We thought the matter was resolved; however, after repairing the keypads, the same problem resurfaced.
Further investigation revealed that it was caused by a chip on the keypad. The manufacturer of this chip assured us that its replacement model would not affect the functionality. We conducted comprehensive testing throughout the entire process, but due to the short time between the two incidents, there wasn't sufficient time for an extended months-long aging test before mass production.
Unfortunately, in prolonged use, this chip exhibited extreme instability, directly disrupting the keypad's function. The subsequent electronic control team ensured stability, leading to a complete fix. We were determined not to compromise on cost, immediately providing upgraded replacement keypads to affected users. We added an additional microcontroller on the chip to supervise the entire keypad, effectively preventing erratic triggers. Learning from this lesson, we significantly heightened our quality control standards for outgoing products. Particularly for Aimicat Pro, we now uphold the strictest standards from the production line to the hands of our users.