Bowden tube coming out of extruder
Posted by Don Recardo
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Bowden tube coming out of extruder February 28, 2015 09:31AM |
Its happened twice now .
During a print the little tongue that holds the bowden tube into the extruder body fell out
the result being it stops extruding and the print is ruined.
Last night it really peed me off because it had been printing for almost 4 hours and I sat with it to make sure
nothing went wrong, about half an hour before it was due to finish I nipped out to make a cuppa and when I came back
the bowden tube was free
I decided I have to stop this happening again so altered the extruder body so that I could put a 3mm screw through it
and into the hole in the tongue that retains the bowden tube . This now stops it falling out
extruder-drive-block-new.STL
During a print the little tongue that holds the bowden tube into the extruder body fell out
the result being it stops extruding and the print is ruined.
Last night it really peed me off because it had been printing for almost 4 hours and I sat with it to make sure
nothing went wrong, about half an hour before it was due to finish I nipped out to make a cuppa and when I came back
the bowden tube was free
I decided I have to stop this happening again so altered the extruder body so that I could put a 3mm screw through it
and into the hole in the tongue that retains the bowden tube . This now stops it falling out
extruder-drive-block-new.STL
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Re: Bowden tube coming out of extruder March 03, 2015 11:05AM |
I'm hoping that masonstonehenge will do a variant of his spring-loaded extruder design to use a pneumatic connector. My Mini Kossel uses these and I have found them to be totally reliable - although I have read that there are different sorts and some grip the tube much better than others.
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
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Re: Bowden tube coming out of extruder March 03, 2015 01:40PM |
Quote
dc42
I'm hoping that masonstonehenge will do a variant of his spring-loaded extruder design to use a pneumatic connector. My Mini Kossel uses these and I have found them to be totally reliable - although I have read that there are different sorts and some grip the tube much better than others.
That is a nice fix, I use them fittings at work and they really do grip, never thought of sticking one there though
Another RS Ormerod Mk1 meets the world
Retired now but I used to make....
CNC Machined Mk1 aluminium bed support plates for the Ormerod
CNC machined X-plates and ribs for Mk1 & Mk2 Ormerods
CNC machined bed support arms for the Mk2 Ormerod.
Dual Hot-End heatsink blocks.
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Re: Bowden tube coming out of extruder March 03, 2015 01:59PM |
Well who would like to guinea pig this version of the spring-loaded extruder?
I don't want to post it on Thingiverse as yet, but it includes the following changes:
1) a larger radius (35mm) for dc42's sake to see if it's the tight radius that causes the filament to break overnight.
2) It has the PTFE tube going all the way through the part to just before the hobbed nut (slightly wider for those that found the hole was too small).
3) It has a 5.2mm hole into the top of the part for the pneumatic fitting. (The 5.2mm will probably print to about 5mm - your mileage may vary)
This link will remain active until a week or so has passed..
Link to the zip file containing stls
Disclaimer: Be aware that this is a purely test version, so there might be mistakes..
Please provide feedback.
Thanks,
VortyZA/MasonStonehenge
Edited 1 time(s). Last edit at 03/03/2015 02:02PM by VortyZA.
I don't want to post it on Thingiverse as yet, but it includes the following changes:
1) a larger radius (35mm) for dc42's sake to see if it's the tight radius that causes the filament to break overnight.
2) It has the PTFE tube going all the way through the part to just before the hobbed nut (slightly wider for those that found the hole was too small).
3) It has a 5.2mm hole into the top of the part for the pneumatic fitting. (The 5.2mm will probably print to about 5mm - your mileage may vary)
This link will remain active until a week or so has passed..
Link to the zip file containing stls
Disclaimer: Be aware that this is a purely test version, so there might be mistakes..
Please provide feedback.
Thanks,
VortyZA/MasonStonehenge
Edited 1 time(s). Last edit at 03/03/2015 02:02PM by VortyZA.
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Re: Bowden tube coming out of extruder March 03, 2015 02:08PM |
Quote
dc42
I'm hoping that masonstonehenge will do a variant of his spring-loaded extruder design to use a pneumatic connector. My Mini Kossel uses these and I have found them to be totally reliable - although I have read that there are different sorts and some grip the tube much better than others.
Dave
You wouldn't happen to have the STL file for that extruder would you?
One tip tho is if you can pass the 4mm PTFE all the way thru the coupling and thru the extruder body and shape it so it is just clear of the hobbed drive.
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Re: Bowden tube coming out of extruder March 03, 2015 02:22PM |
Quote
dougal1957
Quote
dc42
I'm hoping that masonstonehenge will do a variant of his spring-loaded extruder design to use a pneumatic connector. My Mini Kossel uses these and I have found them to be totally reliable - although I have read that there are different sorts and some grip the tube much better than others.
Dave
You wouldn't happen to have the STL file for that extruder would you?
One tip tho is if you can pass the 4mm PTFE all the way thru the coupling and thru the extruder body and shape it so it is just clear of the hobbed drive.
Refer to the post before yours
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Re: Bowden tube coming out of extruder March 03, 2015 02:37PM |
That's typical Whilst I'm drafting a post someone post's the info I'm after ah well it's there now just about to download it and have a lookQuote
VortyZA
Quote
dougal1957
Quote
dc42
I'm hoping that masonstonehenge will do a variant of his spring-loaded extruder design to use a pneumatic connector. My Mini Kossel uses these and I have found them to be totally reliable - although I have read that there are different sorts and some grip the tube much better than others.
Dave
You wouldn't happen to have the STL file for that extruder would you?
One tip tho is if you can pass the 4mm PTFE all the way thru the coupling and thru the extruder body and shape it so it is just clear of the hobbed drive.
Refer to the post before yours
Actually I need the STL's for the complete extruder not just the spring loaded part tho that is appreciated.
Edited 1 time(s). Last edit at 03/03/2015 02:43PM by dougal1957.
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Re: Bowden tube coming out of extruder March 03, 2015 02:48PM |
Quote
dougal1957
That's typical Whilst I'm drafting a post someone post's the info I'm after ah well it's there now just about to download it and have a lookQuote
VortyZA
Quote
dougal1957
Quote
dc42
I'm hoping that masonstonehenge will do a variant of his spring-loaded extruder design to use a pneumatic connector. My Mini Kossel uses these and I have found them to be totally reliable - although I have read that there are different sorts and some grip the tube much better than others.
Dave
You wouldn't happen to have the STL file for that extruder would you?
One tip tho is if you can pass the 4mm PTFE all the way thru the coupling and thru the extruder body and shape it so it is just clear of the hobbed drive.
Refer to the post before yours
Actually I need the STL's for the complete extruder not just the spring loaded part tho that is appreciated.
This extruder is composed of 2 parts, the part that attaches to the motor and the part that pivots - I might be misunderstanding your question?
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Re: Bowden tube coming out of extruder March 03, 2015 02:52PM |
Quote
VortyZA
Quote
dougal1957
That's typical Whilst I'm drafting a post someone post's the info I'm after ah well it's there now just about to download it and have a lookQuote
VortyZA
Quote
dougal1957
Quote
dc42
I'm hoping that masonstonehenge will do a variant of his spring-loaded extruder design to use a pneumatic connector. My Mini Kossel uses these and I have found them to be totally reliable - although I have read that there are different sorts and some grip the tube much better than others.
Dave
You wouldn't happen to have the STL file for that extruder would you?
One tip tho is if you can pass the 4mm PTFE all the way thru the coupling and thru the extruder body and shape it so it is just clear of the hobbed drive.
Refer to the post before yours
Actually I need the STL's for the complete extruder not just the spring loaded part tho that is appreciated.
This extruder is composed of 2 parts, the part that attaches to the motor and the part that pivots - I might be misunderstanding your question?
Ok What I actually need is all the Stl's to be able to print all the parts to make it work ie all the gears bodies mount etc.
Doug
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Re: Bowden tube coming out of extruder March 03, 2015 03:45PM |
Quote
VortyZA
Well who would like to guinea pig this version of the spring-loaded extruder?
I don't want to post it on Thingiverse as yet, but it includes the following changes:
1) a larger radius (35mm) for dc42's sake to see if it's the tight radius that causes the filament to break overnight.
2) It has the PTFE tube going all the way through the part to just before the hobbed nut (slightly wider for those that found the hole was too small).
3) It has a 5.2mm hole into the top of the part for the pneumatic fitting. (The 5.2mm will probably print to about 5mm - your mileage may vary)
Thanks! However, as the fitting is M5 threaded, the hole needs to be about 4.5mm so that I can M5 tap it - unless you think there is room for a nut. Do you mind adjusting the STL?
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
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Re: Bowden tube coming out of extruder March 04, 2015 04:37AM |
Quote
dougal1957
Quote
dc42
I'm hoping that masonstonehenge will do a variant of his spring-loaded extruder design to use a pneumatic connector. My Mini Kossel uses these and I have found them to be totally reliable - although I have read that there are different sorts and some grip the tube much better than others.
Dave
You wouldn't happen to have the STL file for that extruder would you?
One tip tho is if you can pass the 4mm PTFE all the way thru the coupling and thru the extruder body and shape it so it is just clear of the hobbed drive.
If you mean the extruder in the picture, it's the extruder we use on our Mendel and Huxley printers. Though it might have been modified to fit the pneumatic connector. Our original version is here: [github.com]
It is compact, has a sprung idler, and generally works well. The main problem with it is that the large and small gears have small teeth; we print them with a 0.3mm nozzle to get good gears.
Ian
RepRapPro
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Re: Bowden tube coming out of extruder March 04, 2015 07:52AM |
Quote
VortyZA
This link will remain active until a week or so has passed..
Link to the zip file containing stls
Disclaimer: Be aware that this is a purely test version, so there might be mistakes..
Please provide feedback.
Yes, it works.
As DC42 already mentioned, the hole is too big for an M5 fitting, so I drilled it out and glued in an M5 nut.
I couldn't find a M5 to 4mm pipe fitting in any of our boxes of bits, so I am making do with an M5 to 6mm fitting, followed by a 6mm to 4mm reducer for now..
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Re: Bowden tube coming out of extruder March 06, 2015 07:49AM |
Quote
dc42
Quote
VortyZA
Well who would like to guinea pig this version of the spring-loaded extruder?
I don't want to post it on Thingiverse as yet, but it includes the following changes:
1) a larger radius (35mm) for dc42's sake to see if it's the tight radius that causes the filament to break overnight.
2) It has the PTFE tube going all the way through the part to just before the hobbed nut (slightly wider for those that found the hole was too small).
3) It has a 5.2mm hole into the top of the part for the pneumatic fitting. (The 5.2mm will probably print to about 5mm - your mileage may vary)
Thanks! However, as the fitting is M5 threaded, the hole needs to be about 4.5mm so that I can M5 tap it - unless you think there is room for a nut. Do you mind adjusting the STL?
I've made it exactly 4.5 on the 3d drawing - I always find with my slicer that I have to make every inner hole diameter about .4mm larger to make it perfect, but let me know if that's the right size?
Updated .stl
Is the PTFE tube hole large enough?
Edited 2 time(s). Last edit at 03/06/2015 07:56AM by VortyZA.
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Re: Bowden tube coming out of extruder April 10, 2015 11:52AM |
The original is available on Thingiverse here: [www.thingiverse.com]
The one that was in this thread was a very specific test version - it can however be made available if everyone who tested it says it works well
[edit] The link still works for me?
Edited 1 time(s). Last edit at 04/10/2015 11:58AM by VortyZA.
The one that was in this thread was a very specific test version - it can however be made available if everyone who tested it says it works well
[edit] The link still works for me?
Edited 1 time(s). Last edit at 04/10/2015 11:58AM by VortyZA.
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Re: Bowden tube coming out of extruder May 11, 2015 08:07AM |
I know this topic has moved on a bit but for Ormerods with the standard extruder drive assembly, I found that a bit of bent wire is all you need to hold the Bowden securing pin in place. It simply lifts out when you need to release the cable:
RS Components Reprap Ormerod No. 481
RS Components Reprap Ormerod No. 481
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Re: Bowden tube coming out of extruder May 11, 2015 04:06PM |
Here is a version of MasonStoneHenges Spring loaded extruder arm, modified to take a pneumatic bowden connector
masonstonehenge original
[www.thingiverse.com]
My Modded version
[www.thingiverse.com]
Edited 1 time(s). Last edit at 05/11/2015 04:07PM by iamburny.
Limited Edition Red RS Ormerod 1 #144 of 200 - RRP 1.09fw
iamburnys Ormerod Upgrades Github
Follow me on ThingiVerse My Designs
masonstonehenge original
[www.thingiverse.com]
My Modded version
[www.thingiverse.com]
Edited 1 time(s). Last edit at 05/11/2015 04:07PM by iamburny.
Limited Edition Red RS Ormerod 1 #144 of 200 - RRP 1.09fw
iamburnys Ormerod Upgrades Github
Follow me on ThingiVerse My Designs
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