User Manual
The Hermit Crab is an innovative part for most 3D printers in the market.
It is upgraded by R&D team of Shenzhen Big Tree Technology Co., Ltd.
Hermit Crab is an alternative of the traditional POM slider on the X-axis.
It is also can be attached to MGN12H linear rail.
Advantages:
Compatible with various hot ends, such as nozzles, laser heads
High motion precision and excellent printing performance.
With a spring clip, easy to install and remove.
High adaptability, with multiple ports and fixing holes.
Hermit Crab
Recommanded liner rails for Hermit Crab:

Install the linear rail to X-axis of the printer.
Installation instruction
Type 1: Mounting it to X-axis with POM wheels
2. Remove the PCB board as shown
1. Press the spring clip to remove the upper part as shown
3. Install the sheet metal to POM wheels
4. Attach the above part to the slider as shown
5. Fix the PCB board
6. Install the timing belt
7. Install the upper part
Type 2: Mounting it to the liner rail
1. Press the spring clip to remove the upper part as shown
2. Remove the PCB board as shown 3. Installation of timing belt fixing bracket
4. Attach the base to the slider 5. Installation of timing belt
6. Fix the PCB board
7. Installation of upper part of Hermit Crab
Compatible extruders and accessories
Hermit Crab is able to mount nozzles, laser heads
PCB board interfaces
? HE:Heating cable interface
? CNC-F:Controllable fan interface
? FAN: Fan interface
? NTC: Thermistor interface
? For 2 two-phase four-wire stepper motors
? Limit switch interface
? BL Touch interface
The interfaces of PCB board designed for print nozzles,
BL Touch level and limit switch.
1.M3x8 bolt
2.M3x6 bolt
3.M3 spring spacer
4.Slide fixed plate
5.Slider
6.Spring
7.Pull hook
8 Fixed plate
9.PCB-F
10.M3x5 bolt
11.Barb block
12.PCB-M
13.Location pin
14.Tool plate
15.M3x6 bolt
T
Functions:
8P bolt terminal (heating cable+thermistor+2 fan interfaces) + 4P
filament runout detection + 5P BL touch + 4p motor cable
For more expansion of printer head functions.
Hermit Crab CAN is an upgraded version of Hermit Crab,
which launched by the 3D printer R&D team of Shenzhen Big Tree
Technology Co., Ltd. It improves the terminal board,
making wiring more convenient.
NOTE:
1. The installation is the same as Hermit Crab but the wiring is different.
2.The tool plate is the same as the Hermit Crab.
3. Hermit Crab CAN only works with Klipper firmware.
As for firmware setting, please reference to the following link:
https://github.com/bigtreetech/Hermitcrab
Hermit Crab CAN
Wiring of Hermit Crab CAN
Type 1:Connect power cable and USB cable to BTT CAN HotMode
The other end of the power cable is connected to a 24V power supply,
and the other end of the USB data cable is connected to the Raspberry Pi.
PH2.0 4P
USB
USB
Type 2:Tpye-C wire is connected to BTT CAN HotMode.
The other end of the Tpye-C is connected to to the BTT CAN-Distribution
Board, and RJ11 cable is connected to the BTT CAN-Distribution Board
TPYE-C
TPYE-C
POWER -
POWER +
RJ11
The other end of RJ11 is connected to BTT RPT-CAN HAT, and the BTT
CAN-Distribution Board is connected to the Raspberry Pi.
RJ11
BTT RPT-CAN HAT THE RASPBERRY PI