ShopReady Draft 2D · 1:15 · narrated, with captions

A carriage that shuttles between two limit switches, part 2 of 6: A slide, a motor, and why it needs switches

The carriage is put on a slide with two clicks and tried by hand: the pinion turns as the rack is pulled. A motor is put on the pinion with Drive this gear. The program sees that the carriage would run into its end stop and waits for Play; pressed anyway, with nothing to tell the motor where to stop, the carriage runs into the end stop and both turn red. The speed is set to 30 turns a minute and the window works out the rack's travel, 56.5 mm a second.

Before thisA carriage that shuttles between two limit switches, part 1 of 6: The carriage and its rack NextA carriage that shuttles between two limit switches, part 3 of 6: Two limit switches and two rules

This is one part of a longer film

Whole project · 8:36

A carriage that shuttles between two limit switches: the whole project

A rack-and-pinion carriage and its control logic, built from a blank drawing in six steps. The drawing side is rectangles, the Gear tool, a rack added to the gear by a right-click, and an assembly. The Motion window gives it a slide and a motor; the Controls section adds two limit switches, a counter, two buttons and a gate, and five rules that read as plain sentences; the control panel runs it. It shows a machine's wiring tried out on the drawing before anything is built: what each switch is for, what each rule does, and the log of what happened.

The rest of this project

Chapter · 1:30

A carriage that shuttles between two limit switches, part 1 of 6: The carriage and its rack

Chapter · 1:31

A carriage that shuttles between two limit switches, part 3 of 6: Two limit switches and two rules

Chapter · 1:15

A carriage that shuttles between two limit switches, part 4 of 6: A counter, an alarm and the log

Chapter · 1:53

A carriage that shuttles between two limit switches, part 5 of 6: Start, Stop and the control panel