Filament cutter not lining up with spring loaded pin to cut filament

Bambu Lab P1 Series
1

Printer: P1P (p1s to P1P) with AMS

The printer was upgraded to P1P with the official kit from the Bambu store. I have been using this with my AMS system successfully since purchased it without any problems.

Started with a failed print (failed to cut filament err). I believe to the toolhead had crashed due to an overflowing poop chute causing skipped steps.

The printer seems to work fine when there is no need for a filament change/cut.

I have done full maintenance including belt tension.
I disassembled the tool head and checked the magnet was still in place so that it could trigger the hall sensor,
this all looks okay. The error seems to be bypassed if I push the filament cutter in while it is trying to do so by itself.
I’m unsure why the print head is not aligning with the spring loading arm that pushes the filament cutter arm.
I have tried downgrading the firmware and updating again as I believed that this whole error started due to skipped steps and somehow the printer wasn’t resetting when homed causing the miss alignment with the pin that pushes the filament cutter as shown in the video.

https://youtu.be/ieGtRmsaz-4

2

Yeah I encountered an unusual issue and did not anticipate receiving any responses. As a professional engineer with a decade of experience in 3D printing across various types, including Cartesian, delta, Corexy, resin, and custom builds, I have encountered and addressed a wide range of challenges.

The purpose of this post is to share my experience with Bambu support. Initially, the troubleshooting process was extensive, involving the completion of standard tasks such as checking belt tension, examining bearings, and providing numerous pictures and videos to confirm each step. This interaction, mediated by an agent, extended over a week, acting as an intermediary with the R&D department.

As suspected, the issue was identified as a malfunction in the MC board, with additional suspicions regarding the XY motors. Upon requesting my details and order number for sending replacement parts, it was discovered that I had purchased the printer from technologyoutlet.co.uk. The Bambu support agent promptly redirected me to address the matter with Technology Outlet.

Despite Technology Outlet’s courteous and professional communication, the overall experience has been subpar. The troubleshooting routine with them, initiated during the festive season, has extended for an unforeseen duration. The support ticket response took 3-4 days initially, followed by a week of back-and-forth communication. Eventually, after determining a mechanical fault, I was directed to another company.

Regrettably, three weeks have elapsed without a functional printer, and resolution does not appear imminent due to a sluggish support system. My expectations for a more expedient resolution were, admittedly, higher.

I’ll continue to keep you guys updated on my progress.

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3

Continuing my ongoing engagement with Bambu, they have agreed to dispatch replacement components they believe will rectify the printer’s issues. Upon providing them with the necessary details, they identified that I had acquired the printer through an official reseller, prompting me to contact the reseller initially to address the problem.

Consequently, the entire procedure recommenced, necessitating the repetition of explaining the issue and undergoing various tests. Frustrated, I proposed that both companies engage in direct communication to streamline the resolution process, which, after some delay, was eventually facilitated.

I received replacement components in the form of an xy motor and MC board. The xy motor replacement proceeded smoothly, yet the issue persisted. Subsequently, I followed Bambu’s documentation to replace the MC board. Upon powering on the printer, a firmware error message appeared, necessitating an auto fix/update process. However, during this procedure, the bed began heating up without command, causing a circuit breaker to trip and disrupt all sockets in my home.

Upon disconnecting the printer, I could restore power to the sockets, but upon reconnecting the printer, it resumed heating the bed uncontrollably. Despite receiving a replacement MC board under the assumption of a faulty unit, the issue persisted.

As a result, I am currently in the process of initiating the return of the printer.

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