TOOLS

Gearing Ratio Calculator

Check out the Beta version my Lego Technic Gearing Ratio Calculator Tool:

This tool allows you to upload your Lego Technic project .ldr file and analyse the gearing ratios between any two connected gears or axles. Currently supports most gears, axles, worm gears, some differentials, cv joints and universal joints. See the video tutorial on how to use it. It is a work in progress and I would love to hear your feedback on it. Click here to try it out.

Note: As of 25 Septemeber 2021 the tool supports CV joints, linear speed via the radius of the component and improves on the frame rate for higher numbers of parts in a model).

Technic Elbow Art

This is a tool to create "Lego Technic Elbow Art" - a series of intertwined elbow pieces as a single sequence. Choose your dimensions and search parameters and search for new dense solutions and set a record! 

Download your Elbow Art as an .ldr file and build it yourself. Click here to try it out!

Lego Technic Table Tennis Robot

25 Dec 2021

A Lego Technic Table Tennis robot is demonstrated. The table tennis robot can launch balls at up to 10 m/s using two lego technic buggy motors driving a pair of 46mm wheels. The ball baskets holds up to 60 balls that can be fired at the player at an adjustable rate of between 1 ball per second to 1 ball every 3 seconds. The firing angle is adjustable between 15 and 45 degrees using the buwizz 3.0 pro and application on an android tablet.

The robot can produce topspin or backspin depending on the relative speed of the ball launch wheels. The robot is demonstrated on a table tennis table in backhand mode.

The lego technic table tennis robot is made of 1708 parts and measures 39.1cm x 27.2cm x 38.6cm and weight 1.593 kg.

More to explore

New Flat 12/20 Gear Friction

23 Apr 2022

The Lego Technic set 42140 App-Controlled Transformation Vehicle introduces two new gears - a flat version of the 12 tooth bevel gear and a flat version of the 20 tooth bevel gear. These gears are designed to have less friction.

In this video I measure the difference in gearing efficiency...read more

Lego Technic Powered Up Tutorial 2 - Speed Control

19 Feb 2022

This is my second Lego Technic Powered Up Tutorial that focusses on Lego Technic motor speed control using the Powered Up hub and Powered Up programming interface. The Lego Powered Up App is run on a Samsung Android tablet. I demonstrate how to set and control the power level applied to a motor.<...read more

Lego Technic Powered Up Tutorial 1

3 Oct 2021

This tutorial is for beginner Lego Technic Powered Up programmers. It teaches how to turn motors on and off, read and set their axle angles as well as axle calibration using the Powered Up app on the google store or apple store.

...read more

Lego Technic Pi Day Machine

14 Mar 2022

 

Here I present a Pi Day special Lego Technic machine that produces a gearing ratio of Pi/8 using a 56mm wheel driving a 13x13 square wheel.

The correctness of the ratio is confirmed by matching it with output of a 2 differential gearing system that produces a ratio of 355/9...read more

Measuring Gearbox Efficiency

6 Nov 2021

This video describes a method for measuring the efficiency of a gearbox using the Lego Technic Powered Up hub. Gearbox efficiency is defined as the ratio of the output power to the input power and here I show how to measure each of these values to allow you to calculate the overall efficiency.read more

Lego Technic Powered Up 3 Speed Automatic Car

14 Aug 2021

 

This video presents a new lego technic 3 speed automatic RC car. The gearbox uses the lego technic powered up hub and 3 motors to drive, steer and switch gears. The car's 3 speed automatic gearbox has 3 forward speeds with gear ratios 1:1, 3:5 and 1:5 and has been programmed us...read more

Lego Technic Gearing Ratio Calculator Tool

16 Jul 2021

Here I present my new Lego Technic Gearing Ratio Calculator tool. This tool allows you to upload your Lego Technic .ldr (Lego Draw) file and it will simulate the gearing system and visualize it as well as showing the gearing ratios relative to the input component.

The tool can be accessed...read more

Lego Technic Omni Directional Vehicle v2.0

11 Jun 2021

This is an improved version of the Lego Technic Omni Directional RC Vehicle v1.0 (https://youtu.be/crj3kOiSmHg). Several improvements are made in this model mainly around the mode switching from driving forwards and backwards to rotating on the spot. In the previous model there was a lot of gear ...read more

Lego Technic Measuring Gear Backlash

22 May 2021

Lego Technic gear backlash, also known as gear slop, gear play or simply gear lash is explained and demonstrated. The idea for this video came from a previous lego Technic design that exhibited problem causing gear backlash. The angle of lego technic gear backlash depends on the air gap and the n...read more