3.8g-h - Impact Printers: Professor Messer

Dot-matrix printer

Printer type that uses a small matrix of pins for its print head to make marks on paper.

Pros of dot-matrix printers

Can produce multiple copies easily, with a low cost per page.

Cons of dot-matrix printers

NOISY operation, narrow niche for usage, and low resolution.

Print ribbon

A long ribbon that contains ink, used in dot-matrix printers to produce output.

Tractor feed

Continuous paper feed system that moves paper through an impact printer via perforations.

Maintenance for dot-matrix printers

Includes printer ribbon replacement, print head replacement, and careful replacement of paper.

When to replace print ribbon

Replace when the ink becomes too light as it is being consumed.

How to replace print head

Remove the old print head and insert a new one, typically modular with a release lever or bar.

Why replace print ribbon and print head together

For optimal printing results as both wear over time.

Steps to replace paper in dot-matrix printer

1. Match the paper to the tractor feed position. 2. Clear obstructions that could block paper flow.