August 17, 2024
Description
I've created printable collets that are compatible with my hubs! You can download and print them here:
https://makerworld.com/en/models/672203#profileId-600030
A replacement kit for the Anycubic Kobra 3 to allow you to use 2 ACE Pro units and print with up to 8 colors.
It requires collets to keep the tubes secure. You can probably use any brand as long as they are the same size. I will also link the exact ones I used at the bottom. (or use the printable ones linked above)
It replaces the Filament Hub (the "splitter" on top of your print head). Simply unscrew the stock hub, and replace it with this via the same 2 screws.
The cap for the hub will need 9 collets (link at the bottom). Press them in until they snap in place. Once in they should feel loose, this is because the teeth need to be able to expand in order to fit the tube. When inserting the tubes, press it in as far as it will go, there will be a stop inside which prevents it from going too far.
Once the tubes are in all the way, you will need to use the blue clips that come with the collets. These are required as they are what pulls the collet up which compresses and engages the teeth. To remove the tubes, remove the clip and press down on the collet so it's all the way in and pull out the tube. It's the same concept as the original, except there's no springs (which is why you need the clips).
The Cable Holder located on the left hand side to hold all 8 tubes +the power cable and the extra tube for external rolls. It attaches the same as the original by sliding in the groove. It should be a firm fit just like the stock. I also altered the angle slightly to not be as aggressive as the stock holder. I also added a smooth fillet on the bottom to help guide external rolls into the tube easier. The collet and tube for external roles here is not required, it's just there if you want to use it.
And it includes new tube organizers to keep it all tidy. They will hold all 9 tubes + the power cable.
Lastly, if you only print shorter models I recommend pulling through more of the power cable and tubes through the holder to reduce the bend angle at the print head. There is a small section in the power cable intended to fit at the holder, but it makes the length too short, even with the stock hub. See this picture for an example of how much to pull through.
In the raw files you'll find a project file for Anycubic's version of Orca that you can use where I have everything pre-setup for you if you are printing this on your Kobra 3. Sorry I don't use their normal slicer so there's no file for that one.
If you are just downloading the STLs and setting it up yourself, I recommend changing the following settings.
Layer heights: .06mm - .1mm
Outer/Inner walls order
Arachne Wall Generator
No higher than 60mm/s for the outer walls for the main body.
For the main body you want the smoothest walls possible. So if you can, print this on it's own plate with a .2mm nozzle and a maximum of .08mm layer height, lower would be even better.
Also, everything is designed to print without supports. Orient everything to be upside down as shown here:
If you encounter any issues, let me know and I will try to make adjustments. As of now I have not had any failures, but all my tests have been 1-2 hours long only.
Link to the collets I used:
License:
Standard Digital File License
Mirkosa
