Box Turtle with A4T Toolhead | VORONDesign | Page 1

gusty smelt Mar 22, 2026, 3:33 PM

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Hey everyone,

I think I’ve gone a bit too ambitious for my first build and could really use some guidance.

I’m working on a Voron 2.4r2 with the following setup:

A4T toolhead

Orbiter 2.5 extruder

Phaetus Rapido 2.0 UHF hotend

EBB36 Gen2 toolhead board

Cartographer probe

LDO Box Turtle MMU

BTT SFS v2 filament sensor

I’m currently stuck on a few things:

Toolhead filament sensor
From what I understand, the Box Turtle requires a filament sensor at the toolhead.

After some research, the Filatector seems like the most reliable option. How do I mount a Filatector on the A4T toolhead?

Filament cutter compatibility
The LDO Box Turtle kit includes the Filametrix cutter, but I understand that it is designed for the Stealthburner.

Is there a way to adapt Filametrix to the A4T?
Or do I need to look at a completely different cutter solution?

Waste management (purge/poop handling)
Do I need something like a Blobifier or similar waste management system for this setup?
Or is a purge tower sufficient?

I have a lot more questions, but I’m hoping clarity on these points will help me figure out the rest.

Appreciate any help—thanks in advance 🙏

torpid bolt Mar 22, 2026, 5:23 PM

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gusty smelt Hey everyone, I think I’ve gone a bit too ambitious for my first build and coul...

The best and BT suggested way to load filament is to use 'ramming'. If you put a rubber band between the PTFE tubes coming out of the TurtleNeck to keep it closed (just enough tension to do while loading), it works fantastic in loading to the toolhead. Which makes there no need for a toolhead sensor.

For the filement cutter, your best bet is the crossbow cutter, which has specific mounts/gantry cutter arms for the A4T toolhead.

For waste managment, the AFC has it's own built in poop/kick/etc macros. Just print yourself a silicone brush holder and purge bucket and push the waste into there. Purge tower is also helpful for the longer prints to ensure you don't have any color bleed between colors. Hopefully this helps as a start!

Everything you'd need to print is available on printables or github.

gusty smelt Mar 30, 2026, 8:35 PM

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torpid bolt The best and BT suggested way to load filament is to use 'ramming'. If you put ...

Hello. Thank you so much for replying. I will go down the 'ramming' route for now.

I am really really sorry for not replying to you here earlier. I had a Reddit post on this in parallel and forgot to check up over here (I have my notifications disabled).

ancient quarry Mar 30, 2026, 9:03 PM

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I have a similar setup…. A4T on my sv08 max with orbiter 2.5 and box turtle.

I used this tool head sensor. It has been working well. https://www.printables.com/model/743889-orbiter-2-filament-extruder-sensor-for-ercf

over on the AFC discord I don’t believe ramming is the preferred method, but it will work.

I have the crossbow cutter for my a4t tool head, it is decently cheap on Ali express and works great. You’d have to track down the specific stls for your hotend/a4t combo with crossbow cutter, also should be able to find help with that on the afc discord if you can’t find it in their GitHub files.

Purging for filament changes is a bit annoying on a flying gantry machine. I have an ugly setup that works for me without taking the nozzle down to the bed to poop every filament change. Whatever you do just make sure the poops are contained or they could find their way into a pulley or something and kill a print or worse.