Flexi Rex with stronger links

by DrLex, published

Flexi Rex with stronger links by DrLex Dec 30, 2017
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This is another remix of Kirbs' Flexi Rex, based on airfish's remix. Apparently the original model was made by someone else, but I don't know who. If someone knows, drop me a message.
My print of the original model was not very kid-proof, one of the links broke after some rough handling. Hence I made all links more robust. This means this model can probably be printed even smaller than the original ones before the links become too weak. Of course you can also scale it up at will.

If you want to make a dual extrusion print like this one from Adafruit, check out the remix by AndrewSink.

Print Settings

Printer Brand:




0.2 mm




Printed with 3 perimeters for more strength. No supports needed.

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This looks great. I'm going to eventually try to mod it so it can hold a desk cable or pen or something.

Hi thank you for this model.
sorry for my english, i speak french.
I printed a couple for my kids and they love it. Now they ask me for another dinosaure!
I can try to create it with Catia V5 but I need some information. What is the clearance you give arround the mecanism?
You design it with what kind of software?
Thank you again and have a nice day

I did not design the original model, I only modified it, and I did this in Blender (which is not the easiest program to work with). I cut up the model and reassembled it with improved hinges. I attached a diagram with the most important dimensions if you want to create something similar.

Ok nice thank you, i will try something :)

Noob question, I'm starting on 3d printer with a new matter mod-t, how do I set perimeters on Cura 3.xx ?

You can enable ‘wall line count’ in Preferences -> Settings to be able to specify this. Otherwise, you could set wall thickness to the nozzle diameter times the number of perimeters (although I'm not sure this will always do what you expect).

Good job. I printed 10. I just couldn't stop.....

Really great job! after printed, pulled out from hotbed outstanding flexible and with stronger joints.

Tks for this remix!

Printed perfectly on my Monoprice Mini. Great design. Thanks!

I am not sure if it is just me, but it does not print the tail until 4-5 layers up hence ruining the tail. any tips?

Judging from the 49 successful makes so far, it might be just you. What software and settings are you using? Are you printing this at normal scale? If you get a preview of the print, are the layers also missing there, or is it just your printer that skips them?

I use cura, and I print on a monopolize select mini v2. So update: I tried printing again and this time it only skipped the first layer of the tail so I quickly put a piece of painters tape down and you can't even tell it missed a layer. I'll have to keep looking in to why it skips. Thanks for the file.

It may be that the model is not sitting flat on the bed in Cura.
I just printed it at 100% and 200% scale and both finished perfectly.

Printed perfectly! Awesome design, I would love to see more Flexi Creatures.

Does this scale up well?

Yes. I made a 285%, the biggest that would fit on my print bed. Works perfectly. He also prints great down 40%.

I printed at 100% and 200% too (will post a make shortly) and both turned out great.

Yes, someone just made a 200% size print of this.

Flexi Rex with stronger links
by Ciruelo