Hi
I did small experiment since I have a volcano hot end and it's veery difficult to manage a not oversized tip.
As I read, there is a smaller dimension tube to link direct extruder with hot end (like 1,8mm internal) shipped with sets we had available to order. No such sets for now, shopping is difficult since even if the dimension declared is like needed (ID 1,8mm OD 4,0mm) it's reported by buyers not always be true.
I decided to do my own shaping tube in a simple way. Just use a lighter, burn a tube (capricorn in my case) for about 10 sec and pull. The tube is extending the length and decreasing dimension locally. Pulling by fingers was enough, still some force was necessary.
Enclosed pictures of results.
It works like a charm, my 3dchameleon started to work reliably.
Please remember to not breathe the fumes and use good ventilation doing this trick. Overheated ptfe tube produce some nasty chemicals, as I heard.
@Erik Yes. This modified, tighter part of tube goes close to the nozzle.
Pulling still hot filament via it reduces its dimension.
I do have a heavily modified tip shaping procedure, but it would not match with your printer. Mine is an old Ender 3 modified with volcano hotend.
Hi,
i have a lot of problems with tip shaping on my Prusa Mini; this fix seems to make sense. I imagine that the modify is on the head of tube inside hotend, right? Did you some modifies in the code section of the tip shaping? I think that in that case is important increase feedrate of the back filament, so it is still warm in that point.
thankyou
Hi,
i have a lot of problems with tip shaping on my Prusa Mini; this fix seems to make sense. I imagine that the modify is on the head of tube inside hotend, right? Did you some modifies in the code section of the tip shaping? I think that in that case is important increase feedrate of the back filament, so it is still warm in that point.
thankyou
Picture shows modified Capricorn tube. Not the filament.
Could you give some pics of the capricorn tube itself, not just the filament? A little more instruction on how to do this would be appreciated..
Yes! I was just about to build 3dclippy, but tried with this trick as the last resort since my extruder assy is heavy enough and I did not wanted to add more weight.
This narrow tube helped me to finally use 3dchameleon. No more tinkering.
Does this remove the need for a 3D Clippy?
Only the Mk2 and early Mk3s used the 1.8mm ID tube to do shaping... All the later units used standard PTFE with a 2mm ID.
And with the 3DClippy, it makes no difference even on the older units.
Bill