guangxb / croxyboard

Toolboard for simplifying 3D printer tool wiring

CroXYBoard

CroXYBoard is a small 36x34mm toolboard for simplifying 3D printer tool wiring. It is used on the CroXY and MicroXY printers.

It was developed from the ground up, but shares some similarities with the Carabiner board.

Right Angle Connector Upright Connector

This toolboard uses a 16 pin Microfit 3.0 connector and provides XH connections at the toolhead for:

• Extruder
• Hot End (Microfit 3.0 or XH)
• Thermistor
• Hot End Fan (12/24V selectable)
• Part Cooling Fan x2 (12/24V selectable)
• Switch - for endstop or other use
• Aux - 3 more connections for BLTouch or other use
• LED - Always on (12/24V selectable via trace cut/jump). This may be used as a generic power source.

It is possible to use 2 CroXYBoards with one near the printer's controller board and the other at the toolboard. This may simplify wiring somewhat.

16 PIN MOLEX PIN ASSIGNMENTS

Note that the pre-wired 16p cable reuses colors. You will have to trace out which is which. I mark 9-16 with a bit of heatshrink.

1 (Yellow) 12V - If using 24V fans, this can be connected to 24V or left disconnected

2 (Brown) GND

3 (Purple) THERMISTOR A

4 (Blue) THERMISTOR B

5 (Green) SWITCH - XH connector has GND as the other pin.

6 (White) AUX1 - 4th pin of the AUX connector is GND.

7 (Black) AUX2

8 (Red) AUX3

9 (Yellow) 24V

10 (Brown) HOTEND LOW SIDE - High side is connected to 24V

11 (Purple) HOTEND FAN LOW SIDE - High side is jumper selectable

12 (Blue) PARTCOOLING FAN LOW SIDE - High Side is jumper selectable

13 (Green) MOTOR 1

14 (White) MOTOR 2

15 (Black) MOTOR 3

16 (Red) MOTOR 4

BOM

• 1x PCB (See Below)
• 1x 16 pin Microfit3 board connector. Right angle Molex 43045-1600 or Upright Molex 43045-1612.
• 1x 2 pin Microfit3 upright board connector - Molex 43650-0227
• 2x 4 pin XH connectors - JST B4B-XH-A
• 6x 2 pin XH connectors - JST B2B-XH-A
• 2x 3 pin jumper headers - Molex 22032031 (optional, may solder jumper instead)
• 2x 2 pin jumpers AMP 861410021H11LF (optional, may solder jumper instead)
• 1x 16 pin Microfit3 receptacle - Molex 43025-1600, or prewired 16 pin microfit cable harness (recommended)

PCB Manufacturing

I recommend JLCPB for getting the boards made inexpensively and efficiently. OshPark is another option. You only need to upload the gerbers zip file.

DISCORD

We now have a Discord to discuss CroXYBoard and CroXY!