Recent Blogs
Section Liner Mechanism: How the Pawl-and-Rack Indexing Works, Parts, Uses, and Hatching Formula
Section Liner explained — how draughtsmen use this drawing tool to hatch parallel section lines fast and consistently in mechanical and architectural drafting work.
Helicograph Mechanism Explained: Parts, Archimedean Spiral Formula, and Drafting Uses
Helicograph explained — how this geometric drawing instrument generates precise helical and spiral curves for engineering, surveying, and pattern layout work.
Parallel Ruler (form 1) Mechanism: How the Parallelogram Linkage Works, Parts, Uses & Formula
Parallel ruler linkage explained — how the four-bar parallelogram keeps a straight edge parallel during translation, with worked drafting and CNC examples.