Sunlu E2 2, 2.5 & 3 KG spool holder and roller system - 100% Printable - No fasteners

Please heart and download if you like this model, it helps me put time into creating more  useful items!

V5.1 update - added cutout for center filament guide

NOTE:  This must be printed ABS, ASA or better temperature and creep resistant filament.  Please consider using the affiliate links bellow, it really helps me put the time into making these complicated models.

Polymaker 3KG Black ASA: https://amzn.to/4qd1nLP
Polymaker  3KG Grey ASA: https://amzn.to/4puSDQ0
Polymaker 3KG White ASA: https://amzn.to/49sfO7g
Polymaker  3KG Natural ASA: https://amzn.to/4qaX834

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This got a bit complicated, but it is so awesome now. 

•  If you only want to use Polymaker 3KG spools:
  Print:
  Polymaker_Roller.step
  Sunlu_Fix_PolyMaker_3KG_Only_50mm_Offset-V5-Sliced.step
  

• If you want to print 2.5KG Generic spools as well as Polymaker, you must print the 65mm offset version + the lid riser and take the hinges off.   Sorry, taking the E2 apart sucks.
  Print:
  Polymaker_Roller.step
  
  Coex_Roller.step   -- this one is 51.5mm or 2", it works but if your OCD requires it, print the two part.
  or
  TwoPartRoller-UNIVERSAL-SCALE_IN_SLICER.step  [scale the two axes in the slicer of the center body to 52mm or your roll diameter.  when you bring it in do NOT split into objects, it needs to stay as one object with two parts inside]

Roller NOTE: Make sure you turn on random seam and scarf joints for the roller or you will have to file it smooth!!! 

Optional Desiccant Holder add on:

You can print two of these! It will hold two Silica-Gel-box (spool-container, optimized for super fast print) containers.  
The 50mm thick variety is what I have in the pictures.  50g, 75g and 100g.  
NOTE: Two 100g containers will fit on the non filament out side.  They are a perfect fit inside the E2. You can print two 75g containers for the side where the filament exits. 

Print:
1 or 2 - Sunlu_Fix_3KG-V5_Desiccant_Addon.step

* - Print the two parts listed bellow. Do not split the two part roller, bring it in as an assembly. Split the base into parts.   

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The Sunlu E2 is a royal letdown.  The worst part about it is that it cannot use 3KG spools reliably, at least not ones with cardboard spools like Polymaker.  

If you do end up using this, you MUST drill or somehow shimmy the filament into the center position.  Let me warn you - drilling the plastic will make chips inside it.  Taking the chips out will require you to fully disassemble the machine.   The only good side of taking it all apart is that you can put most of the screws back and leave out the ones under the main components so it is easy to take apart next time.  You will also need to take it apart to remove the hinges if you want to raise the lid for a 2.5KG spool.

I give Sunlu no credit. This machine is all marketing hype with a 75% engineered product delivered. 

How this thing works:

1 - It needs friction.  I tested a version with a bearing and it failed miserably. Don't do it man!!! 3 KG rolls are heavy and not balanced, it ill only take 1/2 of a revolution for it to  start auto unwinding and create a knot.  The built in bearing works perfectly. If it gets noisy a bit of graphite lube or pencil lead will fix it.

2 - a roller needs to be printed for every size of filament you have.  I find it convenient to have have two, so you can swap out rolls quickly. 

3 - the barbell clamps are not needed but they are super cool. I used them anyway. 

4 - it all prints on a 250x250mm printer or smaller.  The base is printed in 6 parts then you just snap them together.  They are a tight fit, but when you hammer them in the layer lines lock themselves together and requires not glue or fasteners. 

FreeCAD models are provided so you can modify everything!  The way it is split apart is rather cool, have a look!