Lesson description
After logging in, the full lesson text and a set of review questions will be available to help you check your understanding of the topic.
Lesson 02
Absolute Programming G90
Part of section: Program Operating Modes: G20, G21, G90, G91
This lesson explains G90 mode: how the machine reads coordinates as absolute positions relative to program zero, why this is convenient for drawing verification, and why confusing coordinates with movement distance is dangerous.