PC4 M8x1.25 Bowden Pneumatic Connectors  

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ignacmc
(@ignacmc)
Eminent Member

Thank you...I already bought 10 a month ago just in case...i even managed to find them in Stainless Steel : € 1,85 5% Off | M8 M10 M12 M20 Male Thread Air Pneumatic 304 Stainless Steel Push In Quick Connector Release Fitting Plumbing Gas
https://a.aliexpress.com/_BTKxK0

Posted : 03/11/2020 8:59 pm
karl-herbert
(@karl-herbert)
Illustrious Member

@ignacmc

Thanks, but unfortunately only PC4-M8x1 available

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 03/11/2020 9:14 pm
ignacmc
(@ignacmc)
Eminent Member

Oppps you are right...Damn They are already shipped. I will use the brass ones 😉

Posted : 03/11/2020 10:01 pm
Robert
(@robert-14)
Eminent Member

Anyone tried this approach ?

https://www.thingiverse.com/thing:3976142

 

Posted : 05/11/2020 5:11 pm
karl-herbert
(@karl-herbert)
Illustrious Member

@goszu

It is worth a try. I have not tested it, because I bought the PC4-M8x1.25 couplings.

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 05/11/2020 8:15 pm
Robert
(@robert-14)
Eminent Member
Posted by: @karl-herbert

@goszu

It is worth a try. I have not tested it, because I bought the PC4-M8x1.25 couplings.

Tried it. Printed out of ASA. Went well, fit tight and worked for a while. But I would consider it unreliable.

Ordered PC4 M8x1.25 metal connectors. I think the cut-in ones are better than those "squishy" ones.

 

Posted : 09/11/2020 12:46 pm
karl-herbert
(@karl-herbert)
Illustrious Member

@goszu

I also think that the plastic adapters are not an end solution.
Where do you buy your preferred (non squishy) couplings? Do you have a link for them?

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 09/11/2020 1:27 pm
Robert
(@robert-14)
Eminent Member

@karl-herbert

Orderet those: https://www.aliexpress.com/item/32967678995.html

We'll see if they are any good.

Posted : 09/11/2020 4:11 pm
karl-herbert
(@karl-herbert)
Illustrious Member

@goszu

Thanks! These are the same ones I ordered. They work perfectly on the Mini. The PTFE tube stays where it should be.

 
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 09/11/2020 4:59 pm
Robert
(@robert-14)
Eminent Member
Posted by: @karl-herbert

@goszu

Thanks! These are the same ones I ordered. They work perfectly on the Mini. The PTFE tube stays where it should be.

 

Thanks! Good to know 🙂

Posted : 10/11/2020 4:17 pm
ignacmc
(@ignacmc)
Eminent Member

And the ptfe tube can be only one piece instead of three, which should avoid problems where the smaller piece inside the hotend, shrinks as a consequence or repeated heating cycles and compression resulting in gaps and clogs...

Posted : 10/11/2020 8:15 pm
karl-herbert
(@karl-herbert)
Illustrious Member

@ignacmc

one piece, about 5cm longer then the original:

PTFE quality is Capricorn XS: https://www.captubes.com/

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 10/11/2020 11:55 pm
Alex Hung liked
ignacmc
(@ignacmc)
Eminent Member

Great setup! The original one was 275mm long so following your advice I will aim to 325mm total length... By the way, which extruder are you using? Do your prefer it to the original or to the Bondtech upgrade?

Posted : 12/11/2020 8:44 am
karl-herbert
(@karl-herbert)
Illustrious Member

@ignacmc

The extruder is a self-construction with included filament sensor with LED display in accordance to this model:

https://www.bernis-simple-bowden-extruder.com/v2-bernis-magnetic-alu-flexar-extruder/

Works reliably, even with materials containing carbon.

(Some components shown in the picture have already been replaced by Capricorn PTFE and PC4 fittings.)

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 12/11/2020 3:34 pm
karl-herbert
(@karl-herbert)
Illustrious Member

What else needs to be mentioned: Due to the changed transmission ratio, the values for the E steps/mm must of course be changed, just like with the Bondtech or similar. I have decided to fix this in the firmware (loss of warranty).

 
This post was modified 5 months ago by karl-herbert
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 12/11/2020 3:43 pm
3Dprintedgr
(@3dprintedgr)
Estimable Member

Karl, where did you connect your 2nd print fan? Parallel to the other or in a different set up?

Original Prusa Mini + Smooth PEI
Prusa Slicer 2.2.0...
Posted : 08/12/2020 2:02 pm
Oxygen
(@oxygen)
Reputable Member

just a question: I have placed the PC4-M8 (brass ones) without a clip -- I see sometimes there is a clip on the coupler, are these needed?

Mini with FW:4.3.1 + SuperPINDA + Bondtech Heatbreak + PC4-M8 couplers + 1 piece boden...
Posted : 08/12/2020 2:11 pm
cwbullet
(@cwbullet)
Illustrious Member

I use them without the clip.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 08/12/2020 4:12 pm
karl-herbert
(@karl-herbert)
Illustrious Member

@3dprintedgr

Parallel to the other with only one PWM signal (yellow) to the original fan:

 

here is everything illustrated:

https://www.prusaprinters.org/prints/42554-original-prusa-mini-e3d-v6-hotend

This post was modified 4 months ago by karl-herbert
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 08/12/2020 5:42 pm
karl-herbert
(@karl-herbert)
Illustrious Member

@oxygen

This is a safety device to prevent the PTFE tube from slipping out.

This post was modified 4 months ago by karl-herbert
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 08/12/2020 5:46 pm
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