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Added comment to belts about using negative pitch radius for outside pulleys.

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Chris Palmer
2019-08-21 11:36:48 +01:00
parent e35fb695a2
commit 7c1ff5ecd5
2 changed files with 4 additions and 0 deletions
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2
readme.md
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@@ -165,6 +165,8 @@ exposing enough information to make a battery box.
Models timing belt running over toothed or smooth pulleys and calculates an accurate length. Models timing belt running over toothed or smooth pulleys and calculates an accurate length.
Only models 2D paths, so not core XY! Only models 2D paths, so not core XY!
To make the back of the belt run against a smooth pulley on the outside of the loop specify a negative pitch radius.
By default the path is a closed loop but a gap length and position can be specified to make open loops. By default the path is a closed loop but a gap length and position can be specified to make open loops.
Individual teeth are not drawn, instead they are represented by a lighter colour. Individual teeth are not drawn, instead they are represented by a lighter colour.

2
vitamins/belt.scad
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@@ -21,6 +21,8 @@
//! Models timing belt running over toothed or smooth pulleys and calculates an accurate length. //! Models timing belt running over toothed or smooth pulleys and calculates an accurate length.
//! Only models 2D paths, so not core XY! //! Only models 2D paths, so not core XY!
//! //!
//! To make the back of the belt run against a smooth pulley on the outside of the loop specify a negative pitch radius.
//!
//! By default the path is a closed loop but a gap length and position can be specified to make open loops. //! By default the path is a closed loop but a gap length and position can be specified to make open loops.
//! //!
//! Individual teeth are not drawn, instead they are represented by a lighter colour. //! Individual teeth are not drawn, instead they are represented by a lighter colour.