I recently started printing a few models with PETG-GF. I installed them in CFS because some models required over 1 kg of filament. After a few rolls, I returned to printing with PLA and discovered that after one layer, or sometimes even none, a message about a possible extruder clog appeared. The PTFE tubes were very tight, and after releasing the filament, I discovered there was no clog. After many hours of struggle, I checked the CFS and discovered that because I was printing with fiber-reinforced filament, the sensor plates had simply worn out. CFS is very delicate, and if you don’t want to have the same problem as me, think twice before printing with fiber-reinforced filament.
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Thanks for the report and excellent photos to support the warning. I’m wondering if there might be a way to jury-rigg or MacGyver around that limitation.
Maybe Hot inserts? I haven’t seen unthreaded ones. That would be Ideal. Even threaded ones would probably be O.K. MacGyver-out!
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The problem isn’t the screws. The problem is the sensor plates. Due to their design, they simply wear out quickly.
I wasn’t thinking of using the inserts for screws. I was thinking of using them to reinforce the sensor plate. The part you show in the picture is plastic. by inserting a brass insert with a 1.75mm clearance (maybe more just to be safe) it would reinforce the part of the plastic that you show as worn. In a perfect world, those wouldn’t be threaded inserts, but instead smooth inserts. Something more like these: Threaded Brass Inserts - Headed Screw-in
The plastic part is in good condition, but the metal parts are worn. I have no idea how a brass insert would help with that. This arrow-shaped part is metal .The only thing that can be done is to modify the metal plates.
I think you’re misunderstanding the problem. I’ve circled the worn-out parts, which are metal and can’t be purchased separately.
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Yes, I misunderstood the problem. The first picture looked like wear through a hole in plastic. i see from the other pictures that the issue goes much deeper than that. Now that I see the extent of the problem, I have to say you are right, brass inserts won’t help one little bit.
Hola. Me paso lo mismo. Despues de probar en la misma con PETG y TPU. Asi q desestime esa impresora para ese tipo de filamentos. En la q si utilizo ese tipo y anda super bien es la Ender 3V3 plus. Sin ningun problema. Saludos
Another reason all the various CFS/AMS type systems warn you to not use CF reinforced engineering materials is because they are more brittle and may break inside the mechanism.
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Here is a novel idea.
Measure, draw, and print replacements by side mounted spool.
It is exactly what I will do. Perfect use for PA or PC
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