It is possible to run motors on the Gemini without hall effect sensors. Please contact the Applications Engineers for the custom operating system.
NOTE: This feature will not work with an Emergency brake. The brake will not allow the drive to "wake and wiggle," or "wake and twitch", also known as "wake and shake". The purpose of the wake and twitch is to allow the drive to move the rotor (or platen for linears) in very small increments to determine the exact location in the electrical cycle. The Gemini drive then commutates the motor from the encoder feedback.
The standard operating system uses the hall effect sensors to determine the rotor (or platen) location at initialization and continues to look at the hall-effects until a transition occurs.