UPD168113 datasheet(32/50 Pages) NEC

32 / 50 page

Data Sheet S16423EJ2V0DS

µ PD168113

Figure 11

−3. Transition of Switching of Micro Step Driving

1-2 Phase Excitation

2-phase Excitation

(If Number of Pulses Is Set to 1 for Switching)

Driving mode

Micro step

1-2 phase

excitation

two-phase

excitation

1-2 phase

excitation

Micro step

two-phase

excitation

1st quadrant

2nd quadrant

3rd quadrant

4th quadrant

1 to 7

9 to 15

16 17 to 23

25 to 31

33 to 39

41 to 47

49 to 55

56 57 to 63

11.6.6 Constant-current changing when two-phase excitation/1-2 phase excitation

Da is used to select whether the motor is driven at an output duty of 100% (maximum torque operation) or under

constant-current control when the two-phase excitation driving or the 1-2 phase excitation driving is selected.

When Da = 0, the motor is driven at an output duty of 100%. It is excited in two-phase or 1-2 phase and driven at the

maximum torque regardless of the current setting.

When Da = 1, the motor is excited in two-phase or 1-2 phase at the motor current setting. The output current value

is controlled to be the same value as the driving current at the phase A = phase B position (position of step

θ 8) in the

micro step driving mode.

Operation Mode

Output duty 100% drive

Constant-current control drive

Examples of the motor current waveform is shown 12. STEPPING MOTOR DRIVING WAVEFORM.

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