Iberital Challenge (MC2) Grind Size Indicator Dial and Single Dosing Mod

A curation of original and remixed models to get your grinder to the modern age
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updated April 28, 2024

Description

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I got myself a great bundle deal including two E61 machines, some other bits and this grinder. I do not plan on keeping it but I really like to restore and modify coffee related machines, so there we go, full single dose conversion. 

The dosing cup holder replaces the old portafilter holder. It does NOT account for the timer button, I have directly connected the motor to the on/off switch as the timer is notoriously inaccurate at delivering consistent doses. It is used to close the hole left by the original switch and to hold this model of 58mm dosing cup:

https://www.aliexpress.com/item/1005004298723339.html

(Use image for reverse image search if aliexpress listing goes down)
 

 

 

 

 

 

 

 

 

 


The tilted base, chute and bean hopper are remixes of the following models:

- https://www.printables.com/en/model/412403-iberital-challenge-mc2
- https://www.thingiverse.com/thing:5791046
- https://www.thingiverse.com/thing:6456240

Much love to the authors.

The following modifications have been done to these:

- shaved a few mills off the top of the base so it print's nicely face-down on a textured print surface
- shaved a few mills off the hopper and added grind size indicator as the machine literally comes without any scale to reference grind size adjustments
- shortened the chute, made it more cubic and added a groove to the center for referring grind size

I can only provide a step file for the dosing cup holder as the other models are just STL's I modified on tinkercad.

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The author marked this model as their own original creation.

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