Problem fixing bowden tube to alternative feeder

[reibuehl 42]

Hi,

I have printed the alternative feeder from Robert but now face the problem that I can't reliably fix the bowden tube to the feeder. After a very short time, the bowden rube gets pulled out of the feeder. I used the same bowden coupler and clip as on the original feeder. How can I solve this?

Reiner

 

[swordriff 119]

The hole holding the tube coupler, a white ring insert whith 4 tine llittle

"haken" in it, It needs the hole to be small enough to slightly push the

lower end of this little white insert together, when it is in its upper position where

you insert the horseshoe to holde it.

This way, the little knives, haken, they grip the bowden.

Rarely, it can be useful to cut maybe 5mm from the bowden tube, so the

insert with its lttle grips "hits" another spot on the bowden.

Machbar?

[restinpieces 3]

Did you checked the hole diameter? The whole should be 8mm. If it is to wide the coupler slips easily.

 

[swordriff 119]

Yes! You can probably quickly try this, by putting paper around the insert ring making it thicker, and at least get an indication if it is working. Pretty sure, like restinpieces here, that this is your problem.

[reibuehl 42]

It seems more like the coupler is sitting too tight and I can't push the bowden tube far enough in to make the lower parts of the coupler "fetch" it. I will check the diameter to see if it is 8mm.

 

[IRobertI 520]

The hole is quite tight so if you've printed it quickly or if your printer isn't performing well there's a chance the hole becomes too small (this is the first case I've heard of though). You could maybe drill it open a bit? Oh, and check that there isn't any crap inside the hole blocking the way.

Also, remember the piece of bowden in the hole in the back. I guess I should sit down and re-do that entrance to allow for the metal ring, right Nicolinux?

 

[reibuehl 42]

The filament exit hole has a diameter of 7.3mm in the upper part and 5.6mm in the lower part on my feeder. In the filament entry hole, I have added the 5mm piece of bowden tube.