ShopReady Draft 2D · 1:53 · narrated, with captions

A carriage that shuttles between two limit switches, part 6 of 6: A stepper, a light beam, and the finished machine

The motor is made a stepper: 1.8 degrees a step, 200 a turn, holding until a rule sends it. A gate, a light beam, is added with two clicks across the flag's path. The Start rule is changed to go on by 90 steps, wait for the motor, wait 2 seconds and go back 90. From the control panel each press of Start sends the carriage out until its flag stands in the beam, the gate's lamp lights, and it comes home.

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

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 · 1:15

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

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