Index of /Walkin8r/WalkerTrunk

      Name                    Last modified      Size  Description
Parent Directory - GhassaeiLinkage.png 2013-09-27 05:10 5.2K JansenLinkagesPrint.png 2013-09-27 05:10 39K Klann.scad 2013-09-27 05:10 7.4K KlannLinkage.png 2013-09-27 05:10 15K balanceList.m 2013-09-27 05:10 1.2K barRegion1.png 2013-09-27 05:10 1.3M basketMount.scad 2013-09-27 05:10 2.6K driveElectronicsMoun..> 2013-09-27 05:10 3.5K grid.scad 2013-09-27 05:10 462 linkageJig.scad 2013-09-27 05:10 3.4K plotGhassaei.m 2013-09-27 05:10 885 plotGhassaeiOrbit.m 2013-09-27 05:10 1.4K plotJansen.m 2013-09-27 05:10 930 plotJansenConfig.m 2013-09-27 05:10 1.1K plotJansenOrbit.m 2013-09-27 05:10 1.1K plotKlann.m 2013-09-27 05:10 921 plotKlannConfigs.m 2013-09-27 05:10 1.0K plotKlannOrbit.m 2013-09-27 05:10 1.3K quelab.ini 2013-09-27 05:10 2.9K spacerTest.scad 2013-09-27 05:10 1.6K spacers.scad 2013-09-27 05:10 519 triVertex.m 2013-09-27 05:10 1.0K svn-commit.tmp 2013-10-22 13:02 132 JansenFoot.scad 2013-10-22 13:03 4.0K spacersP1.pl 2013-10-22 13:03 1.8K Ghassaei.html 2013-10-22 13:04 1.1K Klann.html 2013-10-22 13:04 4.0K MainAssembly3D.html 2013-11-07 10:22 3.1K involuteGear.pl 2013-11-07 10:22 8.2K lc20_30_1x1.pl 2013-11-07 10:22 1.6K lc20_30_1x2.pl 2013-11-07 10:22 2.6K lc20_45_1x1.pl 2013-11-07 10:22 1.7K lc20_45_1x2.pl 2013-11-07 10:22 3.3K Building3D.html 2013-11-07 15:57 2.9K PartsPrep3D.html 2013-11-07 15:57 3.8K Building3Dspc.html 2013-12-03 07:49 2.8K testGearP1.pl 2013-12-03 07:49 1.8K JansenBED.scad 2013-12-21 12:31 8.3K pulley.scad 2013-12-21 12:31 3.7K lc20crankLinksP1.pl 2014-01-20 11:13 2.3K DriveMountAssemblyLC..> 2014-01-21 06:46 10K LegAssemblyLC.html 2014-01-30 07:32 9.9K PayloadAssemblyLC.html 2014-01-30 07:32 3.8K lc20_30_P2.pl 2014-01-30 07:32 2.4K lc20_45_P2.pl 2014-01-30 07:32 2.6K spares30P1.pl 2014-01-30 07:32 1.6K spares45P1.pl 2014-01-30 07:32 2.1K testMotorMount.pl 2014-01-30 07:32 1.3K Building.html 2014-01-30 08:03 4.9K lc20_25_P2.pl 2014-02-07 07:07 1.7K payloadTest.pl 2014-02-07 07:07 1.7K img/ 2014-02-09 07:41 - BuildingLCX.html 2014-02-11 08:30 17K Favorites/ 2014-02-28 06:54 - bin/ 2014-05-01 06:16 - com/ 2014-05-01 06:16 - XD20_22_212x400.pl 2014-05-01 06:16 2.3K XD20_30_230x350.pl 2014-05-01 06:16 2.1K XD20_45_344x384.pl 2014-05-01 06:16 2.9K XE20_45_344x384.pl 2014-05-01 06:16 3.6K catchBar107x53.pl 2014-05-01 06:16 1.0K catchTab63x61.pl 2014-05-01 06:16 1.2K e20T45_181x295.pl 2014-05-01 06:16 3.2K e20_22_207x252.pl 2014-05-01 06:16 1.7K e20_30_116x174.pl 2014-05-01 06:16 1.7K e20bhef135x252.pl 2014-05-01 06:16 1.0K e20crankLinks178x109.pl 2014-05-01 06:16 953 e20feet45_180x158.pl 2014-05-01 06:16 2.4K e20hip45_180x132.pl 2014-05-01 06:16 1.5K e20mainBar45_144x191.pl 2014-05-01 06:16 3.0K e20mainGear45_59x59.pl 2014-05-01 06:16 1.3K e20payload30_171x285.pl 2014-05-01 06:16 787 e20payloadSides45_18..> 2014-05-01 06:16 814 gearPlates103x113.pl 2014-05-01 06:16 1.4K hipForks73x97.pl 2014-05-01 06:16 790 laserCutPartsGroups.pl 2014-05-01 06:16 14K laserCutPartsPrimiti..> 2014-05-01 06:16 30K motorMount.pl 2014-05-01 06:16 7.2K payloadBox.pl 2014-05-01 06:16 27K stackers181x181.pl 2014-05-01 06:16 677 toProduction.pl 2014-05-16 10:57 765 stackers61x61.pl 2014-05-18 08:39 672 BuildingLCQ.html 2014-05-18 08:57 22K JansenDefs.scad 2014-08-23 10:37 3.8K BuildingLC.html 2014-08-23 13:46 4.6K Jansen.scad 2014-08-23 13:46 16K JansenDefs.pl 2014-08-23 13:46 6.3K JansenMain.scad 2014-08-23 13:46 3.4K Makefile 2014-08-23 13:46 4.9K NOTES3D.html 2014-08-23 13:46 967 QuelabJansenConfig.ini 2014-08-23 13:46 2.8K motorMount.scad 2014-08-23 13:46 3.3K
Walkin8r
$URL: svn+ssh://mrwhat@ssh.boim.com/home/mrwhat/svn/Walker/trunk/README.html $
$Id: README.html 427 2014-08-23 20:42:39Z mrwhat $

Mr. What's Theo Jansen Walking Linkage

This folder contains source code for solving the locations of nodes of a Theo Jansen walking linkage, through its cycle, and Octave (MATLAB) code to plot this data. JansenCycle.gif is an animation of these plots.

This drawing will help explain my conventions for naming parts of the linkage:

I have started a trac site for this project. Managing trac at Dreamhost is proving to be a challenge, so it is a little rough right now. I have not figured out a way to allow a generic guest user while having authenticated users who can modify the site. As a temporary solution, I may need to ask you to login as user:anon, with a blank password.

Favorite Jansen Linkage Configurations

After changing optimizer to try to stay from known locked configurations, configuration B was investigated, with this orbit. Although the lock/sticking issues were reduced with respect to configuration A, which was used to build the initial prototype robot, it was still an issue.


The optimizer was changed again to give a weight to how far the CH link comes to the B-axis, and configuration D, with this orbit, was chosen for the next trial.
Configuration A was used to build a demonstration robot. The initial linkage print was motorized, and then used to build a sucessful demonstration remote-control robot.
Configuration D was used to build a laser-cut version of the robot.
Remote control is by Bluetooth from Android.


In February, 2014, I re-wrote the optimizer code to have a little less flexibility. This gave more stable optimization results. It tends to converge to an overoptimized solution, with a very wide stance and small, triangular step paths. However, if I set the steps small, it passes through some nice looking configurations on the way. I am currently revising drawings to cut this latest configuration, Configuration E, on the new Quelab laser cutter.

Instructions on Building parts and making plots

as seen in an Intel promotional video

Other Linkages investigated


Last modified: 140518