Four-Bar-Lifter Dynamics

[robotic_ants]

Its Wedgio - http://www.teamwazio.com/wedgio.htmlhttp://www.teamwazio.com/wedgio.html

Chris - ^_^

[typhoon_driver]

lol sorry to go off topic but just looking at a link from that site, I love the fact that typhoon 2 is still ranked number 5 (botrank.com) even though it has been ages since it last faught

[nick]

Wedgio is a really nicely made bot. To be fair to Storm 2, heavyweight lifters are harder in a sense because the stresses required to overcome gravity at their larger scale is roughly double that in a feather.

Has anyone tried a non-flat 4 bar linkage ? I have a picture of what I mean on my profile, it works great in K*bots, the k*bot on the profile has a 13ft flip record with a robot of iits own weight

[razerdave]

guess no-one has

[typhoon_driver]

not as far as i know dave

[wazio]

Cool, I made it onto the UK forum! :-p Wedgio is now ranked #1 ! ! ! :-) I like the batt 4-bar over the pneu just because of the amount of times that you can use it. Mark only has x amount of pops, I can lift whenever I want + it can also clamp. I still have a few new attachemnts that I have yet to use on Wedgio. Maybe at RoboGames I will have to get some out of the box and take pics for yall.

Hey, sorry to drag up an old thread, but I thought this may be useful:

http://www.totalinsanity.net/tut/mechanical/4barfrontbar.phphttp://www.totalinsanity.net/tut/mec...arfrontbar.php

I made a program that simulates the static conditions of a 4 bar lifter(one powered by the front bar).

I found this thread while I was searching to see if it had already been done, so I thought Id post to let you guys know I finished it.

It plots the start/finish orientations and a torque vs angle plot.

Enjoy!

PS-this only works if you are powering the front bar with a motor... dont try to convert a piston force to a torque, this is a different condition. Im going to be making a new simulator soon for piston powered 4-bars (hopefully itll be a dynamic simulation, so itll tell you how far youll toss the other robot, total time for the lift, etc).

[philip_taylor]

Thanks, Adam. I look forward to your ram powered four bar calc.

Bloody hell Adam - thats a bit good

Will be running Storm IIs lifter dymanics through that tonight !

Fantastic bit of VB work too

Ed
http://www.teamstorm.comhttp://www.teamstorm.com