MMU feedback sensor (designed using “turtle collar” technology) - Modèle d'impression 3D

MMU feedback sensor (designed using “turtle collar” technology)

Paulforge

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Publié:2025-12-29 19:48:16

Description

Welcome to a Multi Lane Feedback sensor for MMU's

###### Please post your Makes ######
Please like this, download and post the make if you built it
It helps us makers with feedback and gets us some Prusa meters as most people don't pay it forward

Feel free to help my projects continue https://ko-fi.com/gcodegearhead

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# Intro
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I needed a multi lane feedback sensor for my Low Rider MMU due to the way it parks independant lanes right outside the toolhead. See my toolhead XOL-Metrix UHF for the SV08

This is a remix of the Box Turtle Turtle Neck from Armored Turtle.

It is functional but I will be tweaking to improve.
Print at your own discretion for now, appreciate testing feedack

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# Update Log
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08-NOV-2025	New Dual Spring version finished testing, will be uploaded shortly - will retire old version
29-OCT-2025	Self Centering Spring Loaded version released, retiring old version.
26-OCT-2025	Self centering version in testing
26-OCT-2025	Self centering version in progress (would wait for this one)
26-OCT-2025	Initial Release - functional

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# BOM
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Part	QTY for 2 Lane	QTY for 4 Lane
M3 x 25mm SHCS	/	2
M3 x 10mm SHCS	2	/
M2 x 10mm SHCS or BHCS	8	16
Heat Set Inserts M3 OD5 L5mm	2	2
Limit Switches D2FC NO+NC	4	8
ECAS 04 Fittings	4	8
Spring OD=6mm L=18mm Wire Ø0.5mm	4	8
Wire 22AWG or thicker	As required	As required

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# Assembly Instructions
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Print the parts as oriented. No Supports required
I used 0.2 layer height with 4 walls 15 % gyroid.
For the 2 Lane print
- Slider A
- Slider_B
- Lid_HS
- Base_A
For the 4 Lane print all files with the following exception
- Slider_A x2
- Slider_B x2

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# Wiring
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You want to wire the switches in parallel and in the Normally Open condition.
I did this by snaking the wires through the holes under each switch. I then stripped off a piece of insulation just big enough to solder tot he switch pin.

Wire all GND pins together
Wire both extension switches middle pins together
Wire both compressions switches middle pins together.

Happy Hare Changes

mmu_hardware.cfg

# These sensors can be replicated in a multi-mmu, type-B setup (see num_gates comment). # If so, then use a comma separated list of per-unit pins instead of single pin sync_feedback_tension_pin: ^mmu:PB3 (whatever pin you have) sync_feedback_compression_pin: ^mmu:PB4 (whatever pin you have)

mmu_parameters.cfg

sync_feedback_enabled: 1 sync_feedback_buffer_range: 25 sync_feedback_buffer_maxrange: 30 sync_multiplier_high: 1.05 sync_multiplier_low: 0.95

When enabled and working you will see a “Compression” , “Neutral” or “Tension” symbol in the MMU Panel