Actually, your wrong about that..
1: Bambu doesn’t use Capricorn tubing.
2: Capricorn tubing isn’t wider, it’s smaller (tighter) then regular PTFE.
Capricorn has several different tubes for different applications. If you follow @bigprints link you’ll see the tubing they are referring to has a inside diameter of 3.0mm.
If the Capricorn is too pricey for you Amazon has generic 4x3 PTFE tubing available.
Actually, your wrong about that..
1: Bambu doesn’t use Capricorn tubing.
2: Capricorn tubing isn’t wider, it’s smaller (tighter) then regular PTFE.
No, I’m not wrong about that. Check the Capricorn tubing I linked to, it has a larger inside diameter of 3.0mm that works beautifully for the Sovol SV08 Max. I am aware that Bambu doesn’t ship with Capricorn tubing, Capricorn designed this for the Bambu AMS as an upgrade. It’s in a kit along with a cutter for people to replace the tubing in the Bambu AMS unit. It has considerably less friction than the supplied tubing with the SV08 Max and it has been a successful upgrade for me. Capricorn make a huge range of different diameter tubing for different applications,.
Absolutely true.
Ran into issues on my first roll of Siraya PET-CF, although the issues are not strictly the fault of the feeder or tubing. The feeder design is a single gear almost exacly like the lame original ender3 setup, but with properly made steel rollers with teeth. I made 2 mods that seem to have helped:
As I had some laying around, I switched to the Bambu AMS tubing, (3mm ID) which seems lower friction than the original (tested by manually pushing/pulling filament from feeder output to print head). (likely to pick up some of the 3x4mm Capricorn to try, esp if INDX gets delayed)
Second “mod” was due to somehow losing the supplied spring for the feeder lever, so I drilled the handle spring bore out to 6mm and installed a genuine Creality Ender 3 extruder lever spring, which seems much stiffer… only time will tell if it really helps.
I have a spare K1C extruder (and all steel gears) that I might be able to work into the feeder setup, that is a true large diameter dual gear extruder, even have a spare all metal “upgrade” version with the K2 bearings and double shear support shafts (same gears) with tension adjustment that has worked flawlessly on my mutant Ender 3 for TPU75 to PPA-CF to PET-CF-15%.
What really aggravates the feed issue is CF/CF filled engineering filaments are stiff as hell, and have severe issues when you get past half a roll remaining, as they are stiff, rough surfaces and (biggest issue) coiled VERY tightly.
The arm at the top with the quick disconnect should probably have some sort of swivel/pivot arrangement as it can be a fairly tight bend when the print head is at 0/500 corner.
This is all temporary as an INDX setup is planned, and all filaments will be fed from above in a waterfall arrangement, which is as straight a shot as possible.
What do you think - what is more importanat to avoid false clog reports: installing 3Dprintdemon’s klipper essentials or removing the spring you mentioned & installing a short m3 socket head cap screw as a spacer (what was the length of yours)? Maybe only one of the solutions will be enough?
I use a creality ender 3 feeder spring, as I had one…made a day/night difference.
(this is at the input lever to prevent ground filament, the spacer at the linear feed is another mod)
Using a solid spacer would not give any flexibility and possibly make loading difficult. You could probably shim under the factory spring to stiffen things up a bit.. The E3 spring is larger in diameter and much stiffer.
As to the macro set, back up your std setup and give it a try, but by any means stiffen that drive roller spring up first.