Abstract: A method of improving the synchronization of the timing of a plurality of physically coupled print engines by detecting and eliminating misleading indications of a non-synchronized print engine that are essentially minimal variations caused by disturbances to the printer such as torque disturbances, power line voltage or frequency variations, etc. using a chosen number of consecutive changes in the time delay to result in the time delay of the receiver being handed off from one engine or module to a sequential engine or module before a machine error is declared. This method notes that a speed variation is sufficiently large or if a signal is reported that a module, operating within its speed specifications but near the end the limit of that specification, had been subjected to a small incremental change in module speed resulting in that module operating outside its specifications and takes corrective actions or not depending on the magnitude and or source of the variation.

Abstract: A method of synchronizing the timing of a plurality of physically coupled print engines using a small delta time increment. According to the first mode of practice, the second electrophotographic module, designated as E2, is started at a slower operating speed than its normal run speed. The PI control algorithm that controls the motor speed will then allow the speed of E2 to reach its nominal speed.

Abstract: A method of synchronizing the timing of a plurality of physically coupled print engines using a small delta time increment. According to the first mode of practice, the second electrophotographic module, designated as E2, is started at a slower operating speed than its normal run speed. The PI control algorithm that controls the motor speed will then allow the speed of E2 to reach its nominal speed.

Abstract: A method of improving the synchronization of the timing of a plurality of physically coupled print engines by detecting and eliminating misleading indications of a non-synchronized print engine that are essentially minimal variations caused by disturbances to the printer such as torque disturbances, power line voltage or frequency variations, etc. using a chosen number of consecutive changes in the time delay to result in the time delay of the receiver being handed off from one engine or module to a sequential engine or module before a machine error is declared. This method notes that a speed variation is sufficiently large or if a signal is reported that a module, operating within its speed specifications but near the end the limit of that specification, had been subjected to a small incremental change in module speed resulting in that module operating outside its specifications and takes corrective actions or not depending on the magnitude and or source of the variation.