Service manual

Avantra 36/44 Service Manual
2-16 Functional Analysis
2.11 Spot Generation Module
The Spot Generation Module (SGM) is a field replaceable unit that mounts to the car-
riage assembly. Figure 2-7 illustrates the SGM. The SGM produces a focused laser
spot of the proper size, shape and position.
The SGM consists of a base on which the following mount:
• Laser diode module
• Polarizer/sensor
• Spot size changer/sensor
• Spot forming lens
• Weak/focus lens/sensor
• Beam compression motor/sensor
Figure 2-7 Spot generation module.
➀ –Polarizer sensor. ➁ –Beam compressor motor.
➂ –Beam compression sensor. ➃ –Weak lens motor.
➄ –Spot size changer. ➅ –Spot forming lens. ➆ –Laser diode mount .
➇ –Polarizer wheel and motor. ➈ –Focus sensor. ➉ –Spot size sensor.
11
–Aperture wheel motor.
12
–SGM base.
The following sections describe each of these submodules in detail.
5
2
1
4
8
9
6
11
7
12
3
10