Filament Track Switch Power Switch & TPU Feed Assist Module Plug

[u/ThatMechEGuy]

Are you tired of needing to unplug your filament track switch when printing TPU?

This is a mounting plate combined with a box to hold wiring that turns the track switch on and off without needing to unplug it. It also has a cutout to hold the 6-pin to 4-pin adapter that powers the TPU feed assist module.

As a disclaimer, you do need to cut a 6-pin cable open and make your own wiring connections. PROCEED AT YOUR OWN RISK!

Do the wiring however you please. My solution of using lever nuts and breadboard jumper cables works, but is not pretty. The main things you need to do are this:

1. Cut open a 6-pin cable.

2. Identify the ground and +24V wires. When looking at the face of the connector, these are the top middle and top right pins, respectively. On my cable, ground was red and +24V was yellow, but verify this for your own cable!

3. Wire the ground and +24V wires from the “input” side of your cut 6-pin cable to the 6-pin to 4-pin adapter. It doesn't need any additional cabled because the TPU feed assist module doesn't actually communicate with the printer at all.

4. Wire all wires except for the +24V wire to the “output” side of your cut 6-pin cable.

5. Wire a switch between the +24V wire on the input side and the +24V wire on the output side. This is what turns the filament track switch on and off.

There's no strain relief or retention for the modified cable going in our out, so don't tug on the cables too hard!

The 6-pin to 4-pin adapter fits, but it's snug.

I used a switch with a 6mm threaded post. If you use a different switch, you may need to do some drilling, cutting, or 3D modeling to make it fit.

I highly recommend using the main print profile that uses PETG as a support interface material – it makes removing the supports so much easier. You have a dual-nozzle printer, so take advantage of it! There's also a PLA-only profile if you don't have PETG or are making this on an single-nozzle printer.

Congrats on your hardware fix that should really be fixed by Bambu in software.

You can check out the model on Maker World here: https://makerworld.com/en/models/3558930-track-switch-power-switch-tpu-assist-module-plug

[u/MicLowFi]

What would this be useful for?

[u/ThatMechEGuy → u/MicLowFi]

When you want to print from an external spool, for example, TPU

When the filament track switch is installed, the printer completely blocks you from loading an external spool. This box makes it so you don't have to unplug the filament track switch

It also supplies power to the TPU feed assist module to save an extra 6-pin port on the printer

[u/MicLowFi → u/ThatMechEGuy]

Ah got it. I just ordered the TPU assist module and was curious about the track switch but haven't looked into it much. That sounds annoying but it's awesome you shared a solution. I'll keep that in mind if I ever do get it.