I have created a model for AMS Lite based on this model after receiving many requests. Unfortunately, I do not own an AMS Lite, and I have been unable to find one locally that I can test on. If you are willing to participate in an experimental and UNTESTED AMS Lite version please visit https://makerworld.com/en/models/1011533#profileId-990997
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I put a lot of time and attention into designing and testing this assembly, and your support is greatly appreciated!
This is an AMS Saver unlike any other. Not only does it prevent wear and tear on your AMS filament inlet, but it also prevents snags and obstructions from delaying your print!
NOTE: I am actively updating this model as I receive feedback, so if you have any issues please message me and I will work with you to resolve them. Also, check back often for the next improved version!
This AMS Saver differs from the other options because it has a mechanism that automatically cuts the filament if a tangle or an obstruction (taped end of the spool) is detected. This feature is turned on or off with a slider lock. Cutting the filament when a snag is detected allows the printer to automatically switch to your backup filament by setting up the Auto Switch function. If you are running a long print, this can save you hours of delayed print time! If you don't have the Auto Switch function activated, it gives you a few minutes to take action while the printer continues to use the filament in the tubes. You have a few minutes to address the issue and re-feed the filament manually for an uninterrupted print.
Process WITHOUT Cutter
Process WITH Cutter and WITH Auto Refill enabled
Process WITH Cutter and WITHOUT Auto Refill enabled
AMS Style
This is compatible with all AMS for the X1 and P1 series printers. It is not compatible with the AMS Lite. If you are willing to participate in an experimental AMS Lite version please visit https://makerworld.com/en/models/1011533#profileId-990997
Desiccant holders
It is compatible with desiccant holders placed in front of the AMS.
Spools
It is compatible with all spools compatible with the AMS, even the Narrowest Respool!
Filament
Some engineering-grade materials such as PA-CF may be too tough/strong/hard for the mechanism to cut. If you have trouble try using a new sharp blade. Let me know if you want a version that can work with these materials, and I may design one if there is enough interest.
ABS filament density is 18% lower than PLA, so a full 1kg spool includes more filament length. This extra filament length makes the spool diameter so big that there is no room to close the AMS lid with a full ABS spool and the AMS Saver. You can still use the AMS Saver with the lid cracked open, or you can install an AMS Lid Riser.
Filament - The cutting trigger force is dependent on the filament stiffness. I tested with standard PLA, but if you use a different material the trigger force may be too high or too low. Refer to the “Trigger Tuning” section below.
Filament Cutter - Spares may have been included in your printer shipment, or you can purchase them at the Bambu Store.
PTFE Tube - At least 2.75 inches (70 mm) of 4 mm OD is required. Spares may have been included in your AMS shipment, or you can purchase it at the Bambu Store.
AMS Tape Saver Multi-Tool (Suggested) - This is a helpful tool that helps hold and cut the Teflon tubing.
https://makerworld.com/en/models/982416
Insert the 1/4 inch tube into the hole at the bottom of the Slide.
Note: The default Slide design on Plate 1 seems to have the best trigger force. The trigger force can be changed by using a different Slide model. Refer to the “Trigger Tuning” section below.
Caution: The cutter is sharp! Handle with care.
Note that you can remove the Bracket by reaching down and pushing the bottom of the Bracket free of the Feeder.
NOTE: The written instructions below are the most updated. The pictures and videos are for reference only and may not be updated with the latest design improvements.
Ensure the Cutter lock is engaged so you do not accidentally cut the filament while loading it! The (X) is visible when the Cutter is locked.
The material you use to print the model may be softer or harder than what I used for development. A softer material will create a weaker spring resulting in a lighter trigger and less force to activate the cutter. The inverse is true for harder material. If you are having issues with the cutter triggering too soon (cutting without a tangle) or too late (AMS feeder can't feed) don't worry. I have you covered.
The Slide part has the plastic spring incorporated into it, and there is a number on the back of the Slide indicating the thickness of the spring. The default Slide is marked with "1.8" indicating a spring thickness of 1.8 mm. A thicker spring will compensate for triggering too soon, and a thinner spring will compensate for triggering too late. Plates 2 through 9 have different Slide spring thicknesses, and they are labeled in Bambu Studio with the spring thickness on that plate (a minimum of 1.4 mm and a maximum of 3.0 mm).
If you have a cutter triggering too soon, look at the back of your Slide part and note the number. Print the plate with the Slide spring one increment thicker. Remove the current Slide and replace it with the thicker version. For example, if you have a "1.8" on the back of your Slide, then you should print the 2.0 mm plate. Test this new spring thickness and see if you are still encountering triggering that is too soon. If it is still triggering too soon then keep increasing the spring width until you find a Slide spring that triggers at the appropriate time. Let me know if you are still having issues and I will help.
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