Spool Holder for N2

[sylus]

Lots of other spool holders out there as well. Thanks for the help Raise community.

We must give to Caesar what is Caesar's ; it's Sylus solution remix from a ultimaker user design
and photohoolic reports in the forum few days ago...

i didn't experiment printing problems linked to that but it's good for the noises (no spool that rubs on the door anymore) and it improves the feeding because there's absolutly no friction... even if i don't visually notice an improvement

One thing i've not told you is that on my first printer (from october 2016), the spool holder were in metal and heavy... i saw that on the last printers, they are in plastic and lighter and so it's less stable (i never used this plastic raise3d spool holder because i had 2 metal ones)[/quote]

I love remix things ,this shape was my favorite UM2.
Next level now....

[jerteach]

As i have been advised 2 days ago, this design is a good one !
http://www.thingiverse.com/thing:1729239

I will probably be printing that design, however has anyone tried it in the top spool holder? My copy of it went in easy but was almost impossible to remove. Not an issue with the lower spool holders. I am printing my one with a smaller extension so it can be removed from the top location.

[sgeolog]

Hi,
DarrenN2 did you upload you files? Can you do it please?

Thanks

[jerteach]

So my spool holder now works, but it really isn't much of a reduction in friction from the original. My one used 0.3 N while the stock one used 0.5 N. I was expecting a larger gap in measurements but that is what I got, remember that the error in these measurements is probably about 0.2 N so the values are fairly close.


My spool holder 0.3 N

Raise offset spool holder 0.5N

What did however really surprise me was the friction increase after I fed the filament through the
small filament holder tubes was a large 1.1 N force !

So I am now working on a sleeve to replace the filament tubes

When looking at my other 3D printer the Raise tube is almost half the size.

Tinkerine feeder tube on the left and the Raise3D feeder tube on the right.

The mystery of the phantom frictional forces continues.

[3d4you]

For some Filaments it is a really good idea to make an outdoor spool holder. I tried CarbonX on R3DN2Plus andstuck after 30 each time. because of the high buildplate temp the room gets too hot and makes the filament soft. And feeder stucks. Some PVAs have same effect.

[3d4you]

Are there any designs with ball bearing based spool holder ?

[jerteach]

Just an update. I have stopped working on the spool situation. I think an external spool holder is the best situation, however I do not like spool holders that are directly above the printer as I don't want anything dropping into the print.

My spool holder is not much better than the Raise3D one. I stopped working on my 3D Printed filament tube holder since it was worse than the stock short plastic guide tube. I did find it is better to have most of the plastic guide tube below the top of the machine.

My raft issues seem to be more to do with printing at 205 degrees C and incorrectly using the long filament holder (which I do not use now). When I print PLA at 210 or above I get a better top of my raft. Another solution is to slow down the raft printing speed.

[jerteach]

While I haven't had many issues with my filament being loaded in the stock position, I did have some issues using a Wood filament. The extruder feeder gear would slip on the filament in some cases.
I do not have an easy way to feed filament from above, due to the location of my printer, so I decided to print a spool holder to accomplish the same goal.
I could probably refine the parts a little further to reduce material amount used and print time, but this works for me for now
If anyone is interested, I can redesign, and post on thingiverse.

Thanks
Darren

Hi Darren: Can you post the raw stl files zipped here? Would be really great to see what you did. Has the spool ever fallen into the printer? I am looking into a similar design which has the spool a few inches away from the top of the printer, but my design uses a lot more material. (Thinking for speeds sake that I might just to make it out of real wood. )

Here is a re-post of Darren's design.

spoolholder.JPG (26.18 KiB) Viewed 3276 times

[jerteach]

So my latest design is an external spool holder with fidget spinner bearings and using the guide tubes supplied with my Raise3D N2.





This has reduced the friction forces from the default spool holder at about 1.2 N to around 0.2 N

Default Friction around 1.2 N

External Spool Holder less than 0.2 N

What was really funny was that the low friction Spool Holder actually caused a real problem since nothing stops the filament coming off the real.

Combined with another problem, is that conductive filament breaks at the entry point into the extruder. So a solution to both issues was the guide tube and connectors supplied in the N2 box.

Good solution so far.

[walshlg]

Nice, I'm working on a tough design for the big spools from push plastics, I'll let you know how it goes. Have the spools way up on the wall seems to help- quite a bit but need a step stool to get up that far

[jerteach]

I also have another version of the above spool holder without the fidget spinner bearings. These actually may be the best version as it has enough friction to naturally let the filament slide out. I am testing both situations.

[pwheller]

I created a double spool holder, each holder uses bearings in a double cone (one screws in to hold spool in place).
Being cones, it copes with different widths and diameter spools and could get 4 spools pre loaded on rack.

[Roy93]

I also made it for N1.

[MAx]

Ray93, Is it possible to share the model with us?

[Casale8]

What's the spool holder Ø?

[Vicky@Raise3D]

What's the spool holder Ø?

If you mean the origin design of the Raise3D stock one, the diameter is 32mm.

[jetdillo]

http://www.techtoolsupply.com/ProductDetails.asp?ProductCode=56-250
Here is what I found to work very well "Decoil-Zit Wire and Cable Spooler 25in"

Do you find that you get any oscillations in the cabinet or missed steps or other effects from that style of spool holder being mounted on top of your printer ?

[ABH]

Strange how people are inventing solutions to imaginary problems
Never had any issues with too high load from full 1 kg spools mounted on the std. Raise3D spool holder.
I would certainly NOT like to have a spool holder with low friction bearings, that would keep turning from it's inertia after a sudden pull in the filament from a moving printer head.
Whether it's by coincidence or not, then the Raise3D standard spool holder works just as it should. Because the diameter of the spool holder is smaller than the spool hole, the likelihood of the spool continuing the rotation after a sudden filament pull is very small, thereby greatly reducing the risk of filament coming off the spool. In my view, this property is much more important than reducing the friction.

[Michael.P@Raise3D]

@ABH,

There are a number of reasons to need a different spool setup and for some they will want to reduce friction as much as possible. In the case of Flex filament, for example, some have used the reduced friction bearing setup to assist in reducing stretching of the filament.

[ABH]

"Stretching of the filament" - Do you mean grinding in the extruder gear because of excessive force required to pull the filament from the spool?
I cannot imagine that there will be any measurable effect of stretching the filament outside the extruder gear.
I now have a Bondtech modification, but even before that modification I printed with flexible filament (750 g spools) without severe grinding issues on the stock extruder design.
Also, I would think that the force required by the extruder gear to push the melted filament through the nozzle orifice will be orders of magnitude higher than the force required to pull the filament off the spool with friction. So, the nozzle gear will see the sum of these two forces and if the latter is only a fraction of the push force, then you are optimizing the design in the wrong place!