Method of encoder signal compensation and apparatus thereof

An encoder signal compensation method, comprising the steps of:

• reading encoder output signals;
• computing a width error compensation parameter and a phase error compensation parameter;
• compensating width errors and phase errors in the subsequent encoder output signals;
• and
• utilizing the compensated subsequent encoder output signals to control a printing process.

A printing apparatus, comprising:

• an encoder;
• a compensation parameter calculation unit, which is coupled to the encoder to compute a width error compensation parameter and a phase error compensation parameter of an encoder output signal;
• a compensation parameter storage unit, which is coupled to the compensation parameter calculation unit to store the width error compensation parameter and the phase error compensation parameter;
• an encoder signal compensation unit, which is coupled between the encoder and the compensation parameter storage unit to receive subsequent encoder output signals and to compensate the subsequent encoder output signals using the width error compensation parameter and the phase error compensation parameter;
• and
• a printing unit, which is coupled to the encoder signal compensation unit to control a printing process using the compensated subsequent encoder output signals.