TurtleNeck 2.0 - The smart toolhead buffer.
AT Discord:
TurtleNeck 2.0 (TN2) Is a toolhead buffer for klipper printers designed to work with the AFC Klipper Add-on. It ustilizes an STM32G0B1 MCU over usb-c to operate. Making it a single cable addition to your klipper machine.
TN2 utilizes two hall effect sensors to dectect movement of the buffer before hitting a hard stop in either direction. Adiddtionally on the PCB are 5 endstops ports that can be utilized for filament combiners or "hubs". The purpose of a toolhead buffer such as TN2 is to compensate for mismatched rotation distances between a toolheads extruder and a direct drive AFC ("type 2 MMU" if you like calling them that...) TN2 uses JST-PH connectors for all of its expansion.
#BOM#
| Part | QTY |
|---|---|
| TN2 PCB | 1 |
| 3x2mm magnet | 1 |
| M2.5x10 FHCS | 1 |
| ECAS04 bowden collet | 2 |
| M3x8 SHCS | 4 |
| M3x10 FHCS | 2 |
| M3 Heatset insters | 4 |
| 1mm Felt adhesive backed | ~1x10mm X4 |
#Pins of note#
| Device | Pin |
|---|---|
| USB coms | PA11/PA12 |
| Trailing hall effect sensor | PB1 |
| Advance hall effect sensor | PB2 |
| Endstop 1 | PB5 |
| Endstop 2 | PB6 |
| Endstop 3 | PB7 |
| Endstop 4 | PB8 |
| Endstop 5 | PB9 |
| RGB (neopixel) | PD3 |
#Schematic
