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Piglet print head control board

4 months ago 2722
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Description

This board runs Klipper and mounts on the back of the Voron Afterburner extruder stepper motor. It is designed to attach to this Raspberry "Pi G"-code HAT along with this motor board and a small Hall-effect Add-on Module can be plugged into it. Combined these form Simplified Wiring Implemented with New Electronics.

Connectors:

  • USB - a 4 pin Molex Micro-fit 3.0 connector supplying 24V, GND and USB+ and USB- (to raspberry pi)
  • PROBE - 24V inductive probe - PB8
  • Runout - 5V filament runout sensor (or other input) - PB10
  • TEMP - Hot end thermistor (pulled up with 4.7k resistor) - PA0
  • FAN0 - 24V hot end cooling fan - PA8
  • FAN1 - 24V part cooling fan - PB15
  • HEATER - 24V Hot end heater - PB14
  • Endstops - Two A3144 hall effect switches for X & Y axes - PB0/PB7
  • RGB - 5V LED output. Middle pin can control WS2812B LEDs from GPIO in open drain output mode - PB6
  • TMC2209 - Accepts a TMC2209 or similar stepper stick.
  • ADXL345 - an SPI ADXL345 module can be connected to the right hand part of the stepper stick header for use by Klipper's automatic input shaping tuning.

Note: Klipper does not currently support endstops on a different MCU to the motors so you need to use my fork.

I am using JLCPCB to get prototypes made and have stuck to basic parts for their SMT assembly service where possible. The only essential extended parts are the inductor for the buck converter and the USB termination/ESD protection chip. Update: I've swapped the mosfets to extended parts now.

This board was inspired by Pontus Borg's huvud project

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Print Head Control Board

Print Head Control Board

Smoothed Tracks

BOM

ID Name Designator Footprint Quantity
1 10uF C2 C1206 1
2 33nF C4 C0402 1
3 33pF C1,C5 C0402 2
4 6.8nF C6 C0402 1
5 100nF C7,C8,C9,C11,C13,C16,C17,C20 C0402 8
6 22uF C10,C12,C21 C0805 3
7 10nF C3,C14 C0402 2
8 1uF C18 C0402 1
9 100uF C19 CAP-TH_BD6.3-P2.50-D1.0-FD 1
10 HEAT CN1 CONN-TH_VH-2A 1
11 SS14 D1,D5 SMA_L4.4-W2.8-LS5.4-RD 2
12 BAV99 D2,D3 SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR 2
13 22uH L1 IND-SMD_L4.4-W4.2 1
14 39nH L2 L0402 1
15 FAN0 LED1 LED0603-R-RD 1
16 HEAT LED3 LED0603-R-RD 1
17 FAN1 LED4 LED0603-R-RD 1
18 X LED5 LED0603-R-RD 1
19 Y LED6 LED0603-R-RD 1
20 3.3V LED7 LED0603-R-RD 1
21 PA1 LED8 LED0603-R-RD 1
22 Hole MK1,MK2,MK3,MK4 3MM MOUNTING HOLE 6MM TOP BARE 4
23 RGB P1 CONN-TH_XH-3A 1
24 TEMP P2 CONN-TH_XH-2A 1
25 RUNOUT P3 CONN-TH_XH-3A 1
26 MOTOR P4 CONN-TH_4P-P2.50_XH-4A 1
27 PROBE P5 CONN-TH_XH-3A 1
28 FAN0 P6 CONN-TH_XH-2A 1
29 FAN1 P7 CONN-TH_XH-2A 1
30 ZXMS6004FFTA Q1,Q2 SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR 2
31 AON7524 Q5 DFN-8_L3.0-W3.0-P0.65-BL 1
32 100 R1,R3,R5,R8,R10,R19,R22,R24 R0402 8
33 10K R2,R4,R6,R7,R9,R11,R12,R27 R0402 8
34 1.2K R13,R16 R0402 2
35 680 R14,R17,R18 R0402 3
36 470 R20,R21 R0402 2
37 4.7K R15,R23,R26 R0402 3
38 10KΩ R25 R0603 1
39 RESET SW1 SW-SMD_L3.9-W3.0-P4.45 1
40 B0 SW2 SW-SMD_L3.9-W3.0-P4.45 1
41 STM32F103 U1 LQFP-48_L7.0-W7.0-P0.50-LS9.0-BL 1
42 TPS54331 U2 SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL 1
43 END STOP U3 HDR-TH_4P-P2.54-V-F 1
44 USB U4 CONN-TH_4P-P3.00-S3.00_L7.4-W9.7-EH9.0 1
45 3.3V U5 SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR 1
46 NUF2221W1T2G/USBUF01W6 U6 SOT-323-6 1
47 TMC2209 U7 TMC2209 STEP STICK 1
48 12MHz/20pF X1 OSC-SMD_4P-L3.2-W2.5-BL 1

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