Mainboard Wiring
Interface Diagram
Interface Description
Pin Description
Power Supply Wiring
- Fuse Installation
Driver Installation
Motherboard Driver Jumper
Driver Installation
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Drivers should be inspected before installation to avoid damage to the driver or mainboard.
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FLY Driver: If not using the infinite homing function, set the DIP switch to position 1; conversely, if using the infinite homing function, set the DIP switch to the ON position.
dangerous- CAUTION!!! When installing the driver module, ensure the insertion direction is correct, i.e., the EN pin is in the top-left corner. Incorrect installation may damage the driver or even the mainboard!!! Also, ensure proper heatsink attachment for the driver!!!
Stepper Motor Wiring
- Regardless of the manufacturer, a two-phase stepper motor ultimately has 4 wires. Regardless of color—black, white, green, yellow, etc.—they correspond to 4 wires. Therefore, we need to group the wires into two groups: A and B.
- For a two-phase, four-wire stepper motor, we don't need to know which group is A or B; the main thing is to determine one group. The motor direction can be adjusted in the configuration.
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In 3D printers, the most commonly used stepper motor is the two-phase, four-wire type, whose principle is shown in the diagram. There are two methods to identify the stepper motor wire sequence:
- Connect any two phase wires and manually rotate the motor shaft. If significant resistance is felt, the two wires belong to the same group. Otherwise, they are not in the same group, and other phase wires need to be tested.
- Use a multimeter set to continuity mode. Test any two phase wires of the stepper motor. If they are connected, they belong to the same group; otherwise, they are not, and other phase wires need to be tested.
Heater Cartridge Wiring
Heated Bed Wiring
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AC Heated Bed: When wiring the solid-state relay, be careful not to mix up the input and output.
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DC Heated Bed: When using the onboard MOSFET for a DC heated bed, pay attention to the power rating. The maximum current for a DC heated bed should not exceed 10A. If it exceeds 10A, it is recommended to use an external MOSFET module for the heated bed; otherwise, it may cause irreversible damage to the mainboard.
Thermistor Wiring
Thermistor Type Introduction
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The wiring method for thermistors is shown below. Please consult the seller for the type of thermistor resistor.
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If purchased from FLY (as shown below), set the sensor_type configuration to: ATC Semitec 104GT-2
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If it is a conventional NTC 100K (as shown below), set the sensor_type configuration to: Generic 3950
Mainboard Thermistor Wiring
Fan Wiring
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Fan Wiring
tipFan Voltage Selection. Use a jumper cap to short the corresponding voltage pins as shown below. Note: The jumper method within the yellow boxes in the diagram is the same. CAUTION!!! Selecting the wrong fan voltage may damage the fan or the MOSFET module.
- MOSFET Module Installation (non-directional). As shown below.
- Fan Wiring
Endstop Switch Wiring
- Endstop switches come in Normally Open (NO) and Normally Closed (NC) types. For 3D printers, it is generally recommended to use Normally Closed (NC). This way, if there is an issue with the endstop wiring, the system will promptly report an error, helping to avoid unnecessary crashes and printer damage.
The endstop voltage for Super8 can be changed by modifying the shorting resistor. Options are 3.3V, 5V, 12V, default is 5V. The default voltage is sufficient for most usage scenarios and does not need to be changed. If modification is required, please proceed with caution.
Bed Leveling Sensor Wiring
Metal Proximity Switch Wiring
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VORON officially recommends using the Omron TL-Q5MC sensor (previously recommended PL08N; both work on the same principle, only the detection distance differs) for heated bed leveling. The wiring method is shown below.
BL-Touch Wiring
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BL-Touch has five wires in total. Three wires form the first group, responsible for sensor power and probe retraction/extension. The second group consists of ground and signal wires, outputting the endstop signal. When wiring BL-Touch, carefully check the wire sequence. Incorrect wiring may permanently damage the sensor and the mainboard!!! The wiring method is shown below.
Klicky Wiring
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Klicky is a third-party bed leveling sensor that can be made at home at very low cost. It offers stable performance and high cost-effectiveness, and is recommended. The wiring method is shown below.
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Project Address: jlas1/Klicky-Probe
Voron Tap Wiring
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Tap is a nozzle-based Z-probe designed for V2 and Trident printer designs. The entire toolhead moves to trigger an optical switch, offering better precision than conventional endstop switches and compatibility with almost all printing platforms on the market.
warningIt is not recommended to connect Voron Tap to 24V. Certain versions have a probability of burning out the Tap sensor when using 24V. This is not an issue with FLY products but a design flaw in Voron Tap. Please be aware!!!
dangerousNote: Do not reverse the 5V and GND connections, as this may damage the Tap sensor or even the mainboard!!!
FLY-Mini12864 LCD Wiring
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The diagram below shows the wiring method for FLY's mini12864. For screens from other manufacturers, please consult the respective manufacturer. Incorrect or reversed wiring of the Mini12864 screen may cause the host computer to fail to connect to the MCU. If you could previously connect to the mainboard's MCU normally before using the mini12864 but cannot after connecting it, try disconnecting the mini12864 wiring!!!
Connecting to the Host Computer
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The mainboard connects to the host computer's USB port via a Type-C interface, or it can connect via a serial port. Only the former is introduced here.
