This fix is for people with both ends of the Bambu Ams Cable Straight. If your connectors on both ends is straight without an 90 degree angle then please carry on and read.

If your Ams cable comes with a 90 degree and a straight connector on the same cable then please proceed to V2 90 Degree Ams Buffer Right Ptfe Guide Mount - Failed To Pull Back Filament Error Fix https://makerworld.com/en/models/85989.

I update, revise and improve my design for my fixes very often. Please only use my Print Profile (Labelled as Designer or SPStudio) to ensure this fix is updated & work well. Profile with Non-Designer tags may be of poor functionality or non updated model.

Click on Like if this model helped you in some way. It is very important and will help increase the exposure of this design to more people who might need it. Cheers!

Announcement

New and Improved V2 Versions for the Ams Buffer Fix Before Buffer and After Buffer have just been released. Do check them out in my profile to see what are the improvement. Thank you for your continuous support.

Introduction

Failed to pull back filament error can be caused by multiple different variables & factors. This is a part of an series of Ams fixes that i have designed which can complement each other when used together. I do suggest you install all my fixes together for the 0ptimal effect to help your filament travel properly across the entire system which in turn can help improve, reduce or remove any potential Ams errors.

I have grouped all fixes into their respective Collection for ease of searching what to install.

V2 Collection are improvements done on the shortcoming of V1 Collection. Feel free to try V2 Collection and if it doesn't work properly then you can try the V1 Collection. You can easily find each of the Collection by clicking on the Collections tab on my profile.

Unfortunately there isn't a single fix that can 100% work for everyone. What works for others, may not work for you but my fixes is definately a great place to start and have worked for majority of the users. My fixes are precisely measured then modelled. A Proper Fix would have the highest chance to reduce or solve the error.

If you are too bored to read the entire lengthy write up explaining the need for this fix, here is the TL:DR.

What is this?

V2 Ams Buffer Ptfe Right Guide Mount Fix will correct and maintain a nearly 100% straight line when the Ptfe tube exit the Ams buffer to move into the printer extruder. Its design is accurately measured to let the Ptfe tube be as level as possible at the Ams buffer to allow the most smooth, least amount of friction and pressure for the proper angle to go into the extruder thus greatly reducing the possibility of an Failed To Retract Filament error or similar errors from popping up.

Who needs this fix?
I believe that anyone with a Ams would benefit from this fix / enhancement regardless of do you have any problem or errors with the Ams / Printer. This will allow your Ptfe tube to be nearly 100% straight (laser and manually measured) when it enter or exit the Ams Buffer. In theory, there are only advantages and benefits after installing. There are literally no disadvantage to this fix.

Main Difference with the previous model Ams Buffer Ptfe Right Guide Mount Fix

1. Completely New Design
2. Will not affect your warranty as its reversible
3. Extremely ez installation yet still precise and accurate
4. Very well supported with an clever groove on the fix pushing and stabilizing the fix onto the rear panel with the tension by lock clip below the cable connector
5. Precise measurement to hold Ptfe tube straight for reduced friction of filament moving through. See installation video how i casually just throw a spirit measure after install and its just levelled itself.
6. Greatly help to reduce Ptfe wear and tear with its small surface contact
7. Friction is further reduced when the Ptfe move through the fix, another benefit of its small contact area
8. Use it with or without the rear spool holder without affecting its alignment
9. No screws needed for the install
10. No possibility for wrong installation with its new design
11. Uses less than 6 gram of filament
12. Will not work if you are using the Multi Ams Hub. (If you are using the Ams Hub for the mini as an splitter it is ok and will work properly for you)

Why choose this fix?

Surely there are similar fixes in the market but most of them are merely holders instead of proper fixes, I will explain why.

Current offerings have problems like complicated installation, an flimsy clip on design with totally no support and a really huge hole for the Ptfe to pass through offering 0 proper alignment at all, poor or non existent support, bulky, uses screws, some cannot be used with rear spool holder and most of them create wear due to long travel which the Ptfe have to go through. Many of the fixes that doesn't even try to align the Ptfe travel properly at all

So this V2 solved all of these issue with a tiny 5.5grAms of Filament.

Remember like all our other fixes, We don't want any movement to pass through filament as it wears them down and if we really have to then i made the contact surface small so it will reduce the wear drastically.

Once again as with all my fixes, this is very precisely measured and designed. I have taken measurements down to 0.10 degree (measuring the outgoing angle out of the buffer) despite stating this fix as nearly 100% straight because there could be as small as maybe below 1mm deviations with every single machine due mass production.

The fix will hold the Ptfe Tube level with the Ams Buffer to allow the filament to pass through with a smooth movement with the least amount of friction.

Prerequisites

Before install, Please check if your connector looks like this.

If you have the 90 degree connector on both ends, please go to V2 90 Defree Connector Ams Buffer Right Ptfe Guide Mount - Failed To Pull Back Filament

Should look like this after Install. Make sure to click the Ams cable under the Ams buffer as shown below. It helps a little as the support for this fix.

What Mod / Fixes / Enhancement do i offer?

Please don't download the wrong one. Only those in the photos below is designed by me who painstakingly took a lot of time to measure carefully and design just to get it working. #SupportOriginal Love you guys for all the support so far!

- Ams FIX Failed To Retract Filament Error (a preventive measure and solve the bay 2 and 3 error and prevent bay 1 and 4 to have any possibility of having an error due to tension and friction) (Updated design on the 2nd photo below, try 1 then if it doesn't works properly for you then install the other one.)

(BRAND NEW) Ams Filament Pull Back Fix V2 Upgraded - Completely New Design Upgrade For Ams Filament Pull Back ERROR! Precisely Measured

- Ams Buffer Fix For Failed To Pull Back Filament Error (reduce wear on the external Ptfe tube and allow the most smooth, least friction angle to go into the Ams buffer thus reducing the possibility of an error popping up)

- V2 Ams Buffer Fix For Failed To Pull Back Filament Error (reduce wear on the external Ptfe tube and allow the most smooth, least friction angle to go into the Ams buffer thus reducing the possibility of an error popping up)

- Ams Fix - Stack the Ams on tp (Using a carefully measured holder to hold the Ptfe in a curved angle that will allow filament to go through with the least possible amount of friction when the Ams is stacked on tp of the printer)

- Ams Buffer Ptfe Right Guide Mount Fix will correct and maintain a nearly 100% straight line when the Ptfe tube exit the Ams buffer to move into the printer extruder.

- V2 Ams Buffer Right Ptfe Guide Mount - The Fix For Failed To Pull Back Filament a newly improved fix designed to replaced the V1 This will correct and maintain a nearly 100% straight line when the Ptfe tube exit the Ams buffer to move into the printer extruder. ez Installation. No screws needed!

- Extruder Ams Filament Pull Back Fix will correct and maintain a nearly 100% straight line to move the filament in and out of the extruder. This will also reducing wear on the Ptfe tube. Its design allow the filament to travel in the most smooth, least amount of friction and pressure for the proper angle to go into and exit the extruder thus greatly reducing the possibility of an Failed To Retract Filament error or similar errors from popping up.

- V2 Extruder Ams Filament Pull Back Fix will correct and maintain a nearly 100% straight line to move the filament in and out of the extruder. This will also reducing wear on the Ptfe tube. Its design allow the filament to travel in the most smooth, least amount of friction and pressure for the proper angle to go into and exit the extruder thus greatly reducing the possibility of an Failed To Retract Filament error or similar errors from popping up.

- The Smooth 4 Way Splitter. Look No Further. Combined with Ams Hub Lite together with this small attachment, you will have the Smooth 4 Way Splitter.

Technical Write Up

Friction - The cause of most of the Ams filament failed to retract problem.
Bends or pressure on the shape of the Ptfe tube in turn creates a lot of friction, as the Printer and Ams is equipped with multiple sensors, these friction will cause filament not passing through the Ams to the printer smoothly and thus causing the Ams Failed To Retract Filament Error and similarly related errors.

So what is the possible solution to the problem?
Firstly we need to reduce friction for filament passing through Ptfe tubes? Simple! If we optimise the angle of the Ptfe it will allow the filament to enter and go through the Ams buffer with the least amount of friction and pressure.

What do i need in additional to installing this printed fix part?
Nothing.

Additional Notes

The error itself is complicated and non definitive. Whatever cause the error today might not be the same area that cause the error again, same with person A and Person B setup, as the error itself is mainly due to tension with friction triggering the sensors in the machine.

I would suggest you download and try and install all my fixes together for the proper effect as together they will ensure a smooth delivery of the filament with much lesser friction (read write ups) and hopefully that will help and reduce or resolve the error. If you use only one or 2 of the fixes the error could still happen as there are still other area might still be causing excessive friction.