Controller board: ESP32 + 2x StepStick carrier (v0.4), FluidNC config

- KiCad project generated by pcb/tools (design, route, schematic, fab outputs).
- v0.4 fixes the v0.3 review findings: low-dropout 3.3 V regulator, OR'd 5 V
  supply, polyfuse, USB ESD protection, input clamps, ceramic decoupling at the
  drivers, A4988/DRV8825 jumper, ground stitching. DRC/ERC clean.
- v0.3 (as ordered) kept in pcb/archive/v0.3.
- FluidNC config.yaml for the board; rho hard limit on.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

pcb/pcbway-order/3-centroid-sandtable-controller-v0.4.csv

@@ -0,0 +1,58 @@
+Designator,Mid X (mm),Mid Y (mm),Layer,Rotation,Value,Footprint
+A1,38.100,61.440,Top,270,DRV8825 StepStick (theta/spin),Pololu_Breakout-16_15.2x20.3mm
+A2,59.100,61.440,Top,270,DRV8825 StepStick (rho/arm),Pololu_Breakout-16_15.2x20.3mm
+C1,24.000,42.340,Top,0,100uF 25V,CP_Elec_8x10
+C2,45.500,42.340,Top,0,100uF 25V,CP_Elec_8x10
+C3,20.500,23.740,Top,0,10uF 25V,C_1206_3216Metric
+C4,26.000,23.740,Top,0,10uF 16V,C_1206_3216Metric
+C5,59.600,19.340,Top,90,10uF,C_0805_2012Metric
+C6,59.600,23.840,Top,90,22uF,C_0805_2012Metric
+C7,27.000,20.340,Top,90,100nF,C_0603_1608Metric
+C8,54.600,10.640,Top,0,1uF,C_0603_1608Metric
+C9,57.500,8.740,Top,90,10uF,C_0805_2012Metric
+C10,55.000,8.340,Top,90,100nF,C_0603_1608Metric
+C13,61.000,44.840,Top,0,100nF,C_0603_1608Metric
+C14,61.000,42.640,Top,0,100nF,C_0603_1608Metric
+C15,61.000,33.340,Top,90,100nF,C_0603_1608Metric
+C16,21.800,57.940,Top,0,10uF 50V,C_1206_3216Metric
+C17,42.800,57.940,Top,0,10uF 50V,C_1206_3216Metric
+D1,16.000,41.340,Top,90,SS34,D_SMA
+D2,28.870,30.340,Top,90,SS34,D_SMA
+D3,13.000,23.540,Top,0,B5819W,D_SOD-123
+D4,34.000,33.340,Top,0,GREEN,LED_0603_1608Metric
+D5,38.000,33.340,Top,0,BLUE,LED_0603_1608Metric
+D6,64.500,45.340,Top,0,BAT54WS,D_SOD-323
+D7,64.500,47.490,Top,0,BAT54WS,D_SOD-323
+F1,12.600,47.140,Top,0,2.5A PTC,Fuse_1812_4532Metric
+J1,12.300,38.340,Top,270,12V DC 5.5x2.1,BarrelJack_CUI_PJ-063AH_Horizontal
+J2,3.400,19.340,Top,270,USB-C,USB_C_Receptacle_HRO_TYPE-C-31-M-12
+J3,4.500,59.940,Top,270,SPIN MOTOR,JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical
+J4,76.500,59.940,Top,270,ARM MOTOR,JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical
+J5,76.500,44.840,Top,270,HOME SW,JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical
+J6,76.500,33.740,Top,270,HALL,JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical
+J7,76.500,22.640,Top,270,LED STRIP,JST_XH_B3B-XH-A_1x03_P2.50mm_Vertical
+J8,77.500,11.340,Top,0,EXPANSION,PinHeader_1x04_P2.54mm_Vertical
+PS1,18.000,28.340,Top,0,R-78E5.0-1.0,Converter_DCDC_RECOM_R-78E-0.5_THT
+Q1,28.000,16.140,Top,0,MMBT3904,SOT-23
+Q2,28.000,12.140,Top,0,MMBT3904,SOT-23
+R1,11.500,20.590,Top,0,5.1k,R_0603_1608Metric
+R2,11.500,17.590,Top,0,5.1k,R_0603_1608Metric
+R3,31.000,18.340,Top,90,10k,R_0603_1608Metric
+R4,31.000,13.840,Top,90,10k,R_0603_1608Metric
+R5,54.600,12.340,Top,0,10k,R_0603_1608Metric
+R6,31.000,25.840,Top,0,10k,R_0603_1608Metric
+R8,47.000,32.340,Top,0,10k,R_0603_1608Metric
+R9,54.000,44.840,Top,0,10k,R_0603_1608Metric
+R10,57.500,44.840,Top,0,1k,R_0603_1608Metric
+R11,54.000,42.640,Top,0,10k,R_0603_1608Metric
+R12,57.500,42.640,Top,0,1k,R_0603_1608Metric
+R13,70.000,33.340,Top,90,330,R_0603_1608Metric
+R14,34.000,30.840,Top,0,1k,R_0603_1608Metric
+R15,38.000,30.840,Top,0,1k,R_0603_1608Metric
+SW1,27.500,8.340,Top,0,RESET,SW_SPST_B3U-1000P
+SW2,22.000,8.340,Top,0,BOOT,SW_SPST_B3U-1000P
+U1,43.000,12.750,Top,180,ESP32-WROOM-32E-N8,ESP32-WROOM-32E
+U2,22.000,16.340,Top,0,CH340C,SOIC-16_3.9x9.9mm_P1.27mm
+U3,66.000,21.840,Top,0,AP7361C-33E,SOT-223-3_TabPin2
+U4,65.500,33.340,Top,0,74AHCT1G125,SOT-23-5
+U5,13.000,13.840,Top,0,USBLC6-2SC6,SOT-23-6