CHAPTER 2 OUTLINE OF OPERATIONCOPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001 2-352.6.3 Feed motor (M1) controlA control block diagram of the feed motor (M1) is shown below. The feed motor (M1) isa four-phase stepping motor. This circuit mainly implements the following kinds of control:• Motor ON/OFF control• Motor revolution direction control• Motor revolution speed controlF02-206-04The CPU (IC1) mounted on the ADF controller PCB receives print mode communicationsdata (such as scale, operation mode, and timing) from the host as commands. It generatesdriving pulses to the feed motor on the basis of these commands.As a stepping motor, the feed motor has the direction and speed of its revolution con-trolled by varying the output order and frequencies of (M1A • M1A* • M1B • M1B*).Signal name FunctionRMOT_A Driving pulse ARMOT_A* Driving pulse A (opposite phase)RMOT_B Driving pulse BRMOT_B* Driving pulse B (opposite phase)RMOT_V-REF Reference current value settingT02-206-01+24VM1J7341562IC1CPURMOT_BRMOT_B*RMOT_ARMOT_A*RMOT_V-REFM1AM1A*M1BM1B*IC7motordriverADF controller PCB
