Lexmark OptraImage 443, Руководство по обслуживанию

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1-9
1.6 Theory of Operation
1.6.1
1.6.1 1.6.1
1.6.1 Introduction
Introduction Introduction
Introduction
This section explains the theory of operation of this scanner.
The microprocessor in this scanner controls the following functions.
•
Interface
•
Scanning module drive
•
ADF drive
•
Reading mode (reading density, document size, half-tone) selection.
Figure 1.3 shows the operation mode sequence.
Reading mode setting
ADF drive/scanning module drive Reading
Figure 1.3 Operation sequence
Figure 1.3 Operation sequence Figure 1.3 Operation sequence
Figure 1.3 Operation sequence
1.6.2 1.6.2 1.6.2 1.6.2 Mechanical Section Operation Mechanical Section Operation Mechanical Section Operation Mechanical Section Operation
1.6.2.1 1.6.2.1 1.6.2.1 1.6.2.1 Scanning module drive Scanning module drive Scanning module drive Scanning module drive
The carrier is driven by a 2-phase stepping motor. The stepping motor has a rotation of 1.8
°
(full step).
And the use of micro-stepping control technique can work the motor to move the scanning module at
1/300 inch/step.
1.6.2.2 1.6.2.2 1.6.2.2 1.6.2.2 ADF mechanism operation ADF mechanism operation ADF mechanism operation ADF mechanism operation
The ADF is driven by a 2-phase stepping motor. The stepping motor has a rotation of 1.8 ° (full step).
The use of micro-stepping control technique enables the motor to move the paper on the ADF at 1/300
inch/step.