|
SawStop is a table saw manufacturer headquartered in Tualatin, Oregon, USA. The company was founded in 1999 to sell table saws that feature a patented automatic braking system that stops the saw within milliseconds if its blade comes in contact with the operator's hand or other body part. ==How it works== SawStop's saws apply a small amount of electric voltage to the blade of the saw. The current through the blade is continuously monitored. If the saw detects a change in this current (as would occur if a hand or other body part came into contact with the blade) an automatic braking system is activated, forcing an aluminum brake block into the blade. The saw stops within five milliseconds, and angular momentum lowers the blade into the table. The operator suffers a small nick instead of an amputation or other more serious injury.〔 The design takes advantage of the difference in "electrical conductivity" (similar to a GFI circuit) between wood and flesh.〔 According to SawStop, there are restrictions and limitations:〔 * The braking system must be deactivated when cutting very green or wet timber. * Non-conductive blades or blades with non-conductive hubs or teeth cannot be used. * The braking system is designed to work with kerfs from 3/32″ to 3/16″; using thinner or thicker kerfs limits the saw's ability to stop the blade after accidental contact, likely resulting in more serious injury. * It is impractical to retrofit into existing table saws.〔 Activating the braking system often damages one to two teeth on the blade.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「SawStop」の詳細全文を読む スポンサード リンク
|