• Overview
• Disassembly
• Assembly
• Spinner Motor
• LDT (Light Detector)
• Film Bow

• Spinner Set Error (memo)
• Speedring Spinner (memo)
• New Dynamic Cable (memo)
• Carriage Movement Improvement at End Position (memo)

Overview

The Dynamic Optics Assembly is located at the heart of the Imagesetter, residing on a carriage which travels along the V-block in the Imagesetter drum. The Dynamic Optics Assembly moves and directs the laser beam during the exposure process.

The following parts of the Dynamic Optics Assembly can be serviced or replaced:

• Laser Light Detector
• Laser Light Fiber Optics Connector
• Dynamic Optics Electronics Board

Disassembly

1. Follow the disassembly procedures described in Lead Screw Assembly, (see Carriage Motion Assembly).

Attention: You do not need to separate the Stepper Motor from the Lead Screw in order to dissassemble the Dynamic Optics Assembly. Therefore, skip Step 6 of the referenced procedure.

2. After withdrawing the Lead Screw Assembly from the Imagesetter, reach into the drum, grasp the film bow (the curved upper part protecting the optics carriage) and withdraw it from the Imagesetter.

The Assembly is heavy; ensure that it does not collide with anything as you remove it. Rest the optics carriage on a large, stable object nearby, such as a table.

Assembly

Reverse the disassembly procedure described above.

Spinner Motor

In the Dynamic Optics Assembly. Operates the Spinner on which the Pentaprism resides. Contains encoder that reports Spinner revolutions to the HOMC and CRI boards.

LDT (Light Detector)

• Light Detector Assembly 509A1L807 (memo)

Overview

The light detector is located on the Dynamic Optics Carriage. It is used to measure the intensity of laser light being emitted during calibration or exposure.

The light detector may periodically require cleaning. It may require replacement if damaged.

Attention: You do not need to disassemble the Dynamic Optics Assembly in order to access the light detector.

The LDT Board

In the Dynamic Optics Assembly. Measures light intensity from the Pentaprism and reports to the HOMC. Receives intensity scale data from the HOMC during calibration.

Disassembly

1. If the Dynamic Optics Carriage is currently mounted in the Imagesetter, move it to its home position (HP) using the Utilities menu. This will enable sufficient access to remove the light detector.
2. Loosen and remove the light detector by removing its two (2) hex screws and wire connector.

Be extremely careful not to scratch the polished surface of the detector!

Cleaning

To clean the light detector:

Remove it from the Imagesetter, as described in the disassembly procedure.

Assembly

Reverse the disassembly procedure described above.

Film Bow

The film bow is attached to the Dynamic Optics Carriage. It is used to guide film through the Imagesetter drum during film loading and unloading.

The film bow must be replaced when a bar punch system is installed (Dolev 4press only).