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parametric universal heavy duty 20ml syringe extruder

by BonsaiBrain, published

parametric universal heavy duty 20ml syringe extruder by BonsaiBrain Jul 1, 2012

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Summary

This is a parametric derivative of richraps famous universal paste extruder.
It was complete redesigned using openSCAD.

I wanted to use 20ml instead of 10ml syringes, so an additional gear was needed to get enough torque.
The construction is quite monstrous, but it fits to standard prusa x-carriage.

I tried to make all depending on the syringe size, but this was too hard.
So the default values are for 20ml syringes.
If you want to change it to 10ml or 50lm syringes you have to change more than only the syringe radius variable.
I also added base plates, if someone wants to cast it.

The syringe extruder successfully printed frost, hazelnut-spread and marzipan.

By adding jelly midprint and pouring chocolade over the finished print one can produce printed multimaterial candy.

If you want to read more about this, visit: www.ifeelbeta.de

Best
BonsaiBrain

Instructions

Get yourself the needed parts.
Assemble, mount it and start making candys..

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Could you please tell me where I can buy these metal components such as bearing, and what is the proper dimensions of them ?
Thanks a lot~

wow Can you make an extruder out of a mini glue gun? or is there an Issue with Filament control....

People have done so...I once watched a YouTube video with one.

Can you print with play-dough?

Never tried play-dough, but it should work as well as clay or marzipan.

What value is used for e_steps_per_mm?

What is the GearRatio of the extruder?

Maybe you can use a formula like this:
e_steps_per_mm = StepsPerRevolution /MicrosteppingOfControler GearRatio SyringeRadius^2 /NozzleRadius^2

Thanks a lot. Great stuff.

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