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3d print flexible replacement treads for the 1960's Mars King Robot. – Transcript
Video by Robothut · Watch the original on YouTube
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- The speaker designed replacement tracks for a 1960's Mars King Robot using Spark Mechanical CAD and printed them in TPU, a flexible filament.
- The ridges on the replacement tracks must be tall enough to prevent the robot's skid plate from dragging on the surface.
- The files for the replacement treads are uploaded on thingiverse so users can have them 3D printed in a flexible material.
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okay today we're going to talk about making replacement treads for a Mars King robot and I've done videos in the past in fact I can think of three of them and I'll put links to them down below you should probably watch if you want to see what's inside the toy how it works and just demos of it working in general this particular video happened because someone left a comment I think on one of my last Mars
King videos saying can you make tracks for this they they needed tracks and I couldn't really answer their question because I'd never tried so what we've done here is we won't cover the Box really or the function of the toy so much as the tracks so I went ahead and designed these and designed spark mechanical as
my preferred uh CAD program and I printed these in TPU which is a flexible uh filament on my 3D printer uh what else there are a lot of flexible materials out there now that my TPU I've had a long time now I don't know four or five years probably I think there's a lot of them out there that are even more flexible and ninja Flex is an old one I'm sure there's a bunch of new flavors
of the month on there the U unusual thing because I've done tracks for other toys but usually the tracks run in a hub system you know that holds everything locked in in the case of the Mars King as you can see it has a high point on the wheels and when you put a flat band on a hub that has a high point the band will always self-center or at least it
will try to the more flexible the band the better it self-c centers these do uh self-center and they do work um one of the trickiest parts besides getting the correct uh diameter for this which I basically I went around this whole thing with a piece of wire measure the circumference change your circumference in diameter then put the diameter into
my 3D CAD program to figure the inside diameter what I was getting at though is one of the things about the Mars King is it's got this skid plate down here on the back bottom and normally when you see this on a toy it's because they've got a large gear on the rear axle or something they want to keep a kid from getting their finger in there but it's it's not lined up with the axle and it doesn't seem to be there for that reason it might have something to do with the
weight of the batteries in the back of the toy and keeping it from tipping back but uh my whole point that I'm trying to get out is with the tracks on there not just these I mean even the original toy tracks there's less than the thickness of a piece of paper clearance between this and the surface that the thing sits on so I had to make sure that I made all
of these ridges tall enough so that that wouldn't drag cuz if it drags than the tracks just sit and spin um TPU is flexible but it's not as grippy as rubber or even silicone would be even better but um we'll put this on here we'll give it a shot you can see they go on like that
Center up um one thing about the Mars King toy I don't know if I mentioned in the other videos or not I can't remember it's one of the loudest toys when you think about the annoying toys that we have these days with the electronic chips in them like the ones that just say fire gun shoot stop just continually doing that which should drive not only the kids but the parents crazy this thing's louder it'll drown those out when it has it siren and it does a siren
every couple of seconds so let's uh we haven't got long here to run so I'll pick it up and I'll keep moving it back as you can see the Treads work just fine and you probably can't even hear me talk over
it on so the main reason I kept talking when the siren was going was so that you could tell the difference between how loud it is all right so you can make them the tracks do work and I like I say I think it's due to the weight of the batteries they put that as an anti- tipping thing to keep
the robot more stationary so I've got the uh files for this up on thingiverse and any of you that need to make these you can hire someone that 3D prints there's all kinds of online services PCB way in China does more than pcbs they also do 3D printing but you can find someone locally kids in your school if you don't have a printer just have them print it in something flexible
ninja Flex or TPU whatever they've got and then you can get your your Mars King up and running again