Electronic brake for lens generator device

摘要

A lens generator device is provided with a dynamic electronic braking circuit for instantaneously interrupting operation of the lens generated under certain conditions to prevent injury to an operator. The lens generator includes a chamber structure having an access cover and having a power driven grinding tool therein. A photoelectric switch is mounted on the tailstock in confronting relation with the chamber structure cover and is operable when the cover is raised or when the tailstock is retracted to operate the dynamic braking circuit and instantaneously stop operation of the grinding tool.