Chapter 77-19F-7-202. Secondary Transfer ATVCThe secondary transfer ATVC determines the secondary transfer voltage to obtain the target transfer current at the time of transfer.a. Startup Condition- At the warm-up rotation after the power is ON.- At the last rotation after passing 500 sheets.- At the warm-up rotation.b. DescriptionT-7-92 Create It - Vt Curve By adding the predefined voltage (+/-100V: vary depending on the environment) to the voltage value obtainedfrom the constant current and measuring each current value, create the It-Vt Cruve.3 Environment Sensor Monitor The DC controller calculates the correction value from the environment sensor information.4 Determine the primary transfer bias The DC controller determines the appropriate primary transfer bias in consideration of the correction value.Sequence Operation Description1 Apply the constant current By applying the constant current to the secondary transfer roller, feedback the voltage data of the secondarytransfer roller to the DC controller.2 Create It - Vt Curve By adding the predefined voltage (+/-100V: vary depending on the environment) to the voltage value obtainedfrom the constant current and measuring each current value, create the It-Vt Cruve.3 Environment Sensor Monitor The DC controller calculates the correction value from the environment sensor output and the print information(paper type).4 Determine the secondary transfer bias The DC controller determines the appropriate secondary transfer bias in consideration of the correction value.Constant Current+100Vt1-100V VtCurrent (It)Voltage (Vt)Target It It
