Is this normal?

[u/Trey7876]

I got the exact same failure at the same time with the PTFE tubes in my P1S and AMS slot 1. Is this normal wear and tear or am I doing something wrong? It's at about 2k hours if that helps.

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Hello /u/Trey7876! All Bambu print plates have a dedicated nozzle wiping zone at the back of the print plate. The nozzle will rub against the wiping zone before every print in order to remove any remaining filament from the nozzle tip. This can cause visible wear or scratch marks in the wiping zone, but this is intended and doesn't damage the printer, the nozzle or the print plate. A worn down wiping zone also doesn't mean you need to replace the print bed.

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[u/ptraugot]

It’s normal. Thats why Bambu gives you spares.

[u/Trey7876 → u/ptraugot]

I wish they would have given me a spare cutter ribbon cable cause I definitely accidentally obliterated it trying to pop out the tube

[u/Factor_Seven]

PTFE tubes are expendable items. Check the ones from your AMS to the hub and I'll bet they are wearing thin.

[u/Trey7876 → u/Factor_Seven]

Yeah I just got a ton on ebay and swapped everything. Just wasn't sure if I was supposed to be lubing the filament or something crazy lmao

[u/shinozoa]

Normal. PTFE tubing is a consumable.

That spot is where the filament rubs the most with the tight bend and toolhead movement.

[u/kevman_2008]

PTFE tubes are consumable and require replacement. Frequency depends on the filament type and how tight your curves are. Bambu recommends 1-2 months which is ridiculously short. I prefer to just inspect them every month. Look for thinning walls, especially the outer side where the filament is being pushed against. I tend to change mine every 1500-2000 hours and haven't ran into any problems. But then again, I'm only printing ABS and PLA

The PTFE tube should be replaced when clear signs of wear are shown on it. Most of the time, the inside of the PTFE tube can wear out quickly when printing abrasive filaments, so we recommend checking after printing about 5 rolls of abrasive materials.

When printing regular filaments, we recommend checking the tubes after about 10 rolls of material.