Y-Axis Motor Control; Outline; On/Off Control; Rotation Direction Control - Canon BJ-W7000 Service Manual

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B. Y-axis Motor Control
1. Outline
The Y-axis motor (M2) is a 5-phase controlled stepping motor.
5-bit parallel signals CMSELES and CMSELO to 3 output from the engine controller are converted to
combinations of 5-phase motor drive pulses (A, B, C, D, E) by the motor driver. Controlling the drive pulses
by these CMSELES and CMSELO to 3 signals switches the rotation direction, rotation speed, and ON/OFF
switching of the Y-axis motor.
Figure 2-202 is a block diagram showing the control circuits of the Y-axis motor.
Engine controller
Motor controller PCB
J202 J301
-B1_CMSELES -10
-B2 CMSELO 9
B3 CMSEL1 8 See >
-B4 CMSEL2 -7 Dine circuit
-B5 CMSEL3 6
4
B6 CMCRTD -5'
-B7_ CMCRTU
Current
control, -—-——)
circuit
Dust cover switch
Figure 2-202
2. ON/OFF Control
Stopping output of CMSEL signal stop the motor drive pulses from the motor driver to stop the Y-axis
motor.
3. Rotation Direction Control
Changing the order in which the CMSELES and CMSELO to 3 combinations of signals are output changes
the output order of the motor drive pulses to switch the direction of rotation of the Y-axis motor.