thomas.s37
Posts: 22
Joined: Nov 26, 2017 5:04 am
Answers: 1
Contact: Send private message

Re: What is the best spool holder alternative?

Jun 11, 2018 9:48 pm

Here you go!
Print everything from here:
https://www.thingiverse.com/thing:2809118
except the attachments to the MK3 frame.

Replace them by the version as found in the attached .zip file.

See the photos attached.

I basically combined the - better - snap on mechanic of https://www.thingiverse.com/make:494591 with the https://www.thingiverse.com/thing:2809118 . And repositioned where the spool is in order to have the filament always in front of the frame.

Have fun!

(If you are a perfectionist: You might notice that the "ball bearing circle cutout / the large empty circle" from my addon does not exactly match with the one of https://www.thingiverse.com/thing:2809118 . It looks a bit odd if you notice it :) . I missed during design that the circle is not in line by some mm with the other circles. DAMN! However can't fix this now. And since it works not that much desire to rework it :).

If you fix it, the construction data is here: https://cad.onshape.com/documents/d9bf0 ... d9e257bcb7
)

Regarding printout, I did use the following settings in Prusa Control:
Prusa PETG
0.2mm layer height (FAST)
0.4mm nozzle
30% infill (DENSE)
Support None, Brim Off.

Took about 2hours to print in silent mode.
About 6m of filament according to the software.

Keep in mind too that the general https://www.thingiverse.com/thing:2809118 is made from tight fit parts. You might need a file to get the parts together.
Attachments
BearingSpoolHolderImprovedMK3Attachment.zip
ImprovedMK3Attachment
(127.9 KiB) Downloaded 22 times
SpoolHolderWithDifferentFrameFixture_ReplacedParts1.png
CustomFixture
SpoolHolderWithDifferentFrameFixture_ReplacedParts1.png (532.42 KiB) Viewed 590 times
SpoolHolderWithDifferentFrameFixture.png
ReplacedParts
SpoolHolderWithDifferentFrameFixture.png (349.75 KiB) Viewed 590 times

User avatar
david.f42
Posts: 695
Joined: Feb 17, 2018 4:53 am
Answers: 6
Contact: Send private message

Re: What is the best spool holder alternative?

Jun 12, 2018 12:52 am

Thomas,

I gather the entire thing literally just snaps together? No glue, screws, or bolts?

I'm printing it now using a PLA+. I may solvent weld it just to be sure....

Not sure if it will be needed, but I'm printing this filament guide anyway just in case: https://www.thingiverse.com/thing:1940114

thomas.s37
Posts: 22
Joined: Nov 26, 2017 5:04 am
Answers: 1
Contact: Send private message

Re: What is the best spool holder alternative?

Jun 12, 2018 3:48 pm

Hi David,

yes no screws,glue, bolts. It just fits into each other and holds by friction / pressure. Depending on your quality of printouts (dimension accuracy you might need to work a bit on the surfaces so they do actually fit into each other if they do not in the first place. I really had trouble with the rectangular bridging element but eventually it did fit in - and I assume I will never be able to separate these pieces again :) ).

The holding by friction/pressure however is too a reason - from my side of view - for the use of PET. Since PET is a bit flexible while PLA is hard/brittle and might break when pushing the parts together. So if you do the PLA version I would like to know how it turned out. I recommend PETG.

Regarding the filament guide. I did never need it, further if the filament would get on its corners it would introduce another bend and somehow I don't know what issue the guide solves. But just my opinion.

Best regards,
Thomas

User avatar
david.f42
Posts: 695
Joined: Feb 17, 2018 4:53 am
Answers: 6
Contact: Send private message

Re: What is the best spool holder alternative?

Jun 12, 2018 4:20 pm

thomas.s37 wrote:
Jun 12, 2018 3:48 pm
...So if you do the PLA version I would like to know how it turned out. I recommend PETG.
Yes, I did print it in PLA+, but you are right: too brittle. I broke off one of the axils trying to fit the bearing on. In retrospect, if something is snap together, it is just asking to be done in PETG. So, I'm re-printing it in PETG now.

thomas.f17
Posts: 20
Joined: Dec 04, 2017 4:23 pm
Contact: Send private message

Re: What is the best spool holder alternative?

Nov 30, 2018 1:24 pm

I haven't needed the 'Under-bearing' type of spool holder since I'm not too unhappy with Prusa's Mk3 spool holder but I feel it needs support from the other side of the spool, especially when heavy reels are used. There are a few designs out there but I didn't see one that kept the best features of the existing holder so I came up with this https://www.thingiverse.com/thing:3247999.

This two part design is simple and fits the standard spool holder, which is not modified in any way.

The shape of the support arm is taken straight from Prusa's spool holder (hope you don't mind Joseph) and trimmed both sides. Also, the detent that locks the arm to the frame is removed so it goes on the frame easily (don't worry it won't slip off). I added a bayonet hole for the twist pin - a removable pin that locates into the center hole of the standard spool holder shaft and twists 90 degrees to lock into the support arm.

This spool holder support can be added or removed whilst printing without risking vibrations, yet it is secure and simple.

I may have over-engineered the parts by using PET for both items and fitting a metal screw (#6 csk x 1.5" with locknut) through the centre of the pin, to ensure nothing will ever break and drop on my nice printer. One less thing to worry about!
Attachments
Spool holder support.png
Spool holder support.png (81.39 KiB) Viewed 353 times

Snardo
Posts: 37
Joined: Sep 26, 2018 8:43 pm
Contact: Send private message

Re: What is the best spool holder alternative?

Dec 11, 2018 8:56 pm

Does anyone have a good solution for a spool holder that sits next to the printer rather than mounted to the top?

User avatar
edward.c6
Posts: 465
Joined: Oct 17, 2017 9:47 pm
Contact: Send private message

Re: What is the best spool holder alternative?

Dec 11, 2018 11:24 pm

Snardo wrote:
Dec 11, 2018 8:56 pm
Does anyone have a good solution for a spool holder that sits next to the printer rather than mounted to the top?
This is the one I use...

https://www.thingiverse.com/thing:3053872

https://cdn.thingiverse.com/renders/43/ ... atured.JPG

clay.h4
Posts: 1
Joined: Feb 16, 2019 3:56 am
Contact: Send private message

Re: What is the best spool holder alternative?

Feb 24, 2019 1:24 am

edward.c6 wrote: This is the one I use...

https://www.thingiverse.com/thing:3053872
I like this simple design. How do you guide the filament up and over the frame into the extruder?

vintagepc
Posts: 324
Joined: Dec 29, 2018 10:30 pm
Answers: 10
Contact: Send private message

Re: What is the best spool holder alternative?

Feb 24, 2019 1:33 am

My own setup:
IMG_0021.JPG
IMG_0021.JPG (1.31 MiB) Viewed 122 times
Mash-up of:

https://www.thingiverse.com/thing:508896
https://www.thingiverse.com/thing:1754587

and a custom bracket I made to bolt it to the back of the z=top with some longer screws. I made the bracket after finding out the 6mm frame adapter is more than likely to kill your filament sensor connector if you do anything at all that makes the printer move to a high Z height.

User avatar
edward.c6
Posts: 465
Joined: Oct 17, 2017 9:47 pm
Contact: Send private message

Re: What is the best spool holder alternative?

Feb 24, 2019 12:40 pm

clay.h4 wrote:
Feb 24, 2019 1:24 am
edward.c6 wrote: This is the one I use...

https://www.thingiverse.com/thing:3053872
I like this simple design. How do you guide the filament up and over the frame into the extruder?
I use the R1 version of this, https://www.thingiverse.com/thing:2943445/files so there's still a bearing used, but it's mainly to keep the filament moving smoothly...
ccc - 1.jpg
ccc - 1.jpg (546.76 KiB) Viewed 108 times

Return to “User mods - OctoPrint, enclosures, nozzles, ...”

Who is online

Users browsing this forum: michael.m63 and 4 guests