1 Topic by 2n2r5 (edited by 2n2r5 2013-05-18 00:16:25)

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Topic: Yet Another Solidoodle Extruder - Bowden Style

Because I wasn't having enough bad luck with my printer, I decided to give it a go at making a Solidoodle bowden extruder. I was inspired by Lawsy quick release system for the hotends. It seems that would work very well as a PTFE Tubing end piece holder. Most of the design is just MK4 remastered. I have a hole some where in my design so I haven't been able to print this yet. (that and I am waiting for a replacement hotend) Just thought that I would put it up here and let everyone tell me why it won't work before I get too far.


The PTFE Tubing is 2mm ID x 4mm OD.
mcmaster.com has it in that size in lengths as little as 5 feet. I am still working on a mount for the hotend. I am hoping to borrow ideas for the X-carriage from nlancaster.

The tensioner arm is beefed up from the original. It is what I am using on my MK4. The one that came with the MK4 seemed to be a little weak for me.

ALL input is welcome.

Post's attachments

Solidoodle_Lawsy_Bowden_Remix.jpg 154.8 kb, 2 downloads since 2013-05-17 

Solidoodle_Lawsy_Bowden_Remix.skp 3.55 mb, 41 downloads since 2013-05-17 

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SD3 w/ mods:
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.

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2 Reply by adrian

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Re: Yet Another Solidoodle Extruder - Bowden Style

Thought about ditching the mould around the ptfe tubing and reworking it for a push-fit connector ? thats what i'm currently working on.. but using a modified airtripper design.

3 Reply by 2n2r5

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Re: Yet Another Solidoodle Extruder - Bowden Style

I was originally thinking something along the lines of a thin walled water cooling hose barb or compression fitting. I don't think that I can use those with the small diameter PTFE.

What kind of push-fit connectors were you thinking? I have seen some people just use a locknut and thread it on the outside of the PTFE then use a dab of superglue for strength.

SD3 w/ mods:
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.

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4 Reply by adrian

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Re: Yet Another Solidoodle Extruder - Bowden Style

Something like these, halfway down the page: http://www.tridprinting.com/Hot-Ends/

Allows the PTFE to push it, then you press down on the collars to release it. Makes it very simple to swap/maintain etc.

5 Reply by 2n2r5

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Re: Yet Another Solidoodle Extruder - Bowden Style

Looks cool. You don't happen to have more detailed dimensions for them do you? I would definitely try those out. Do you have your airtripper operational yet? Ultimately, my goal is to have multi-extruders. Do you have a design for the x-carriage yet?

SD3 w/ mods:
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.

2n2r5's Website

6 Reply by adrian (edited by adrian 2013-05-17 08:01:17)

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Re: Yet Another Solidoodle Extruder - Bowden Style

I believe they are either an 8mm or 10mm threaded body, about 30mm deep. I already have some from another project that are 1/4"..

Mines not finished yet, but same, want to dable with a dual extruder setup.

7 Reply by 2n2r5

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Re: Yet Another Solidoodle Extruder - Bowden Style

What hotend are you using? I would like to create a carriage that will work for most popular hot ends. J-Head looks like it is the most common replacement to the solidoodle hotend. I bought a printrbot one to test with.

Post's attachments

Solidoodle_Lawsy_bowden_extruder.stl 769.67 kb, 61 downloads since 2013-05-17 

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SD3 w/ mods:
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.

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8 Reply by coleke

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Re: Yet Another Solidoodle Extruder - Bowden Style

I ordered those connectors, and can verify they are 8mm threads. The ptfe has popped out on more than one occasion, found I need a wee bit of kapton tape on the end to make it stick in. Let me know how yours turns out. Would like to see the mk4 end on the hot side; maybe we need a cap that can fit on the top of the peek to hold the tube, or just thread the connector directly to the peek?

Grand Rapids, Michigan
SD2 with Sanguinololu board, glass bed mod, E3d_v5 bowden version hotend (currently direct drive), Lawsy Mk5 jigsaw replacement, octopi printserver, drv8825(tiny troubles)

9 Reply by 2n2r5

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Re: Yet Another Solidoodle Extruder - Bowden Style

Updated Files for the drive side. These files are ready for printing and test fit.

Updates:
- Fixed holes in model
- Used single wall supports to make everything printable.

I am still measuring up my x-carriage and hot ends. I am hoping to have the hotend side done soon. (as long as I can stay in town for a bit)


coleke Today 23:08:20

I ordered those connectors, and can verify they are 8mm threads. The ptfe has popped out on more than one occasion, found I need a wee bit of kapton tape on the end to make it stick in. Let me know how yours turns out. Would like to see the mk4 end on the hot side; maybe we need a cap that can fit on the top of the peek to hold the tube, or just thread the connector directly to the peek?

I am going to order some of those connectors. I will have a better idea what they are as soon as it comes in.

Post's attachments

Solidoodle_Lawsy_bowden_extruder_all.stl 217.86 kb, 40 downloads since 2013-05-18 

Solidoodle_Lawsy_Bowden_Remix.skp 3.46 mb, 11 downloads since 2013-05-18 

You don't have the permssions to download the attachments of this post.
SD3 w/ mods:
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.

2n2r5's Website

10 Reply by adrian (edited by adrian 2013-05-18 06:12:57)

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Re: Yet Another Solidoodle Extruder - Bowden Style

So heres mine put together so far.

Using as I said a tweaked Airtripper V3 design that was modded originally by Boots Industries to get rid of the excess bits.

I've further moved the filament path east 1mm, because I'm using the same extruder cog as on the SD from TrinityLabs. The Push-Fits I already had so hence the odd thread sizing.

Just need to get the 45mm M3's for the tension arm and to work out the Hot-End.

http://farm8.staticflickr.com/7361/8750086238_7ff43c5dab_z.jpg
http://farm3.staticflickr.com/2813/8748961399_392353678a_z.jpg
http://farm6.staticflickr.com/5326/8748961001_a09d9a1035_z.jpg
http://farm4.staticflickr.com/3716/8750085370_08f29a8e49_z.jpg

Heres the sketchup for what I've printed up

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Airtripper_Bowden_BI_Edition-SolidoodleMods.skp 350.81 kb, 12 downloads since 2013-05-18 

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11 Reply by 2n2r5 (edited by 2n2r5 2013-05-19 02:52:08)

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Re: Yet Another Solidoodle Extruder - Bowden Style

I really like how that connection looks. Nice and sleek. Is that a standard j-head type mount?

SD3 w/ mods:
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.

2n2r5's Website

12 Reply by adrian

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Re: Yet Another Solidoodle Extruder - Bowden Style

2n2r5 wrote:

I really like how that connection looks. Nice and sleek. Is that a standard j-head type mount?

Im confused - whats pictured is a bowden extruder.. it connects to the hot-end using bowden tube (hence the name)... There is no hot-end involved here.. What exactly are you trying to say re 'standard j-head type mount; ? I haven't posted any pics of the hot-end side yet, which is where the j-head or all-metal-hotend goes etc. Which technically is irrelevant, what is relevant is thats its designed to take "Groove" mounts which is what the J-Head or Makegear extruder (as per standard Solidoodle) have.

So yes its for a Groove mount system eventually - but I haven't built the hot-end side yet, which is where that becomes relevant. Whats pictured is simply the extruder motor and bowden tube system...

13 Reply by 2n2r5

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Re: Yet Another Solidoodle Extruder - Bowden Style

I was asking about your feed tube on the cold end. The part that connects to the PTFE connector. I was just curious if the connections between yours and mine were interchangeable. I apologize for not being more clear.

SD3 w/ mods:
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.

2n2r5's Website

14 Reply by adrian (edited by adrian 2013-05-19 13:27:24)

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Re: Yet Another Solidoodle Extruder - Bowden Style

2n2r5 wrote:

I was asking about your feed tube on the cold end. The part that connects to the PTFE connector. I was just curious if the connections between yours and mine were interchangeable. I apologize for not being more clear.

All good, I was just being confused by all the nozzle talk smile No need to apologize - my bad for having a bitchy evening .

The part I have used is a standard air-hose push-fit connector, but its a 1/4" thread. In a perfect world, you'd get one sized the same as the top end of the PEEK connector, and voila, hot-end interface done. Like what coleke got that's linked above.
What I'll end up doing is having to build a top-mount for the connector.

So yeah, you can use the same setup as on mine, but you'll probably want to avoid the 1/4" thread.

15 Reply by 2n2r5 (edited by 2n2r5 2013-05-26 18:20:26)

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Re: Yet Another Solidoodle Extruder - Bowden Style

I got my printer back up and working and was able to knock these out.

http://2n2r5.com/pictures/printer/lawsy_bowden1.jpg
http://2n2r5.com/pictures/printer/lawsy_bowden2.jpg
http://2n2r5.com/pictures/printer/Lawys_bowden3.jpg

Working on the x-carriage / hotend now.

SD3 w/ mods:
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.

2n2r5's Website