February 22, 2025
Description
I got some new filament from eSun, both spooled and refill, and the sizes of both were significantly different. the spooled ones may just fluctuate, but I think they've changed the size for the refill filament, since they've introduced a new reusable spool of their own.
the new refill size doesn't fit the original model parameters well—and may vary a bit, as well. so, I made spacers.
both of the new models include channels, so that the spacers have a nice spot to lock into. they will work with versions that have no channels, but it's a bit more trouble.
when you assemble a spool—refill or regular—assemble the whole spool, and see how much play there is between the cardboard core and the spool hub. based on that, choose spacers that will fit, lay the spool flat on the table, and insert the spacers into the channels on the side of the spool that's facing up. there's no need to put spacers in the other side, because this will already create enough friction for AMS retraction.
I'm using four spacers so that the cardboard core isn't pushed so far off center. this is probably silly, but I like it.
my first one required four 3mm spacers, but the next one I set up took two 3s and two 3.5s.
spacers are available from 2.5mm up to 6mm in 0.5mm increments, and print upright—no supports necessary.
I really just want to get this uploaded, and I haven't had a lot of time, lately. I will get some more pictures in here, data on the LockSpool parameters, and clean things up a bit. for now, here it is.
I dropped my dark blue eSun PLA+ a few times, and the cardboard sides were deformed enough that it wouldn't roll properly in the AMS— https://www.printables.com/model/608351-esun-bambu-lab-ams-cardboard-spool-adapter-ring wouldn't fit properly, and it kept jamming against the lid.
this variation of the LockSpool fits through the eSun cardboard hub, and into the AMS. once I sorted my tangles, it rolled very well.
this version of it fits https://www.printables.com/model/576578-bambu-lab-ams-universal-spool-center-desiccant-hol . I had to cut the hub walls by 1mm to get the diameter inside the hub back up to “normal”.
credit where it's due: I just plugged numbers into the original scad model to get this—and had to update my openscad to get it to work.
on request, here are the parameters I used (json save file included below):
"bearing_dia": "52",
"hub_dia": "81",
"hubindent": "0",
"hubwall": "9",
"inner_width": "58",
"label": "v2 eSun cardboard replacement",
"numslots": "4",
"spool_dia": “200”
per the Bambu Wiki, “The AMS supports spools with a width of 50-68 mm and a diameter of 197-202 mm.” this is the total width, including the spool walls, so is greater than the “inner_width” of the lockSpool settings.
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v2
the extra space made it possible to get the messed up roll of dark blue onto the v1 spool, but occasionally allowed the filament to get caught. I'm leaving v1 on here, in case it's useful for someone, but I'm not going to use it myself. if your spool is as messed up as mine was, I recommend making a Pastamatic ( https://www.printables.com/model/466883-pastamatic-filament-spool-winder-for-bambu-lab-x1c ).
following the suggestion by Chad Wansing, I put a new spool of black flat on the table, peeled a side off, and fitted the first half of the spool, then carefully turned it over and repeated the process. this kept the filament pretty well spooled, and it worked great once I put it into the AMS.
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v3
apparently, at least some eSun spools have a much smaller diameter. for the smaller hub diameter, I had to reduce the bearing diameter, as well, to get the model to render. this means that desiccant containers (&c.) may not fit this version.
"bearing_dia": "48",
"hub_dia": "76",
"hubindent": "0",
"hubwall": "9",
"inner_width": "58",
"label": "undersized eSun cardboard replacement",
"numslots": "4",
"spool_dia": “200”
License:
Creative Commons — Attribution
7
thoperSought
