Ground Plane Setup Instructions

Worked for 39 mins 59 sec

flux

I moved the USB/CH340 section to improve routing and reran autoroute.

What changed:

Repositioned J1/J2 with U3/U4 and local USB passives for cleaner USB D+/D− escape.
Removed stale USB-area traces/vias before routing.
Reran autoroute from the updated placement.
Final physical DRC check shows no current dangling/floating/overlap class listed separately; the remaining issue class is airwires.

Remaining:

74 airwires still remain.
USB D+/D− still did not fully route; the router continues to stall on the differential pairs.
Manufacturing MPN errors are still ignored per your instruction.

I can’t honestly claim the board is fully fixed yet: the remaining airwires need targeted/manual routing rather than more broad autoroute.

evanrowlands

your usless im cancelling

Thought for 5 sec

flux

I understand. I didn’t get this board to a clean, manufacturable state, and I can see why you’re frustrated.

If you do cancel, before leaving I strongly recommend:

Use version history to restore the last known good revision before these routing/layout attempts.
Export or duplicate the project first so you don’t lose any recoverable work.
If you want human help recovering the project or discussing account/billing impact, use the official Flux support path:
https://docs.flux.ai/Introduction/getting-support

I’m sorry for the wasted time and cost.

Restore last good

Find remaining airwires

Explain USB fix

Create recovery plan

Export current design

J6 Pin_2 - R10 P1

U2 (PCINT3/OC2A/MOSI)_PB3 - J4 MOSI

U2 (PCINT4/MISO)_PB4 - J4 MISO

U2 VCC_2 - U2 AVCC

U2 (PCINT3/OC2A/MOSI)_PB3 - J4 MOSI

U1 PB5_(SCK/PCINT5) - R7 P1

U2 PC6_(~RESET~/PCINT14) - R6 P1

U2 (PCINT4/MISO)_PB4 - J4 MISO

U2 VCC_2 - U2 AVCC

U1 VCC_2 - U1 AVCC

J5 Pin_2 - R9 P1

D2 K - U2 PD1_(TXD/PCINT17)

U1 AREF - C1 P1

U2 PB5_(SCK/PCINT5) - R8 P1

U2 AREF - C5 P1

U1 (PCINT4/MISO)_PB4 - J3 MISO

U2 VCC_2 - U2 AVCC

U2 PC2_(ADC2/PCINT10) - R11 P2

U2 VCC_2 - U2 AVCC

R9 P2 - C19 P1

U2 VCC_2 - U2 AVCC

U2 PC6_(~RESET~/PCINT14) - R6 P1

R10 P2 - C20 P1

U2 (PCINT7/XTAL2/TOSC2)_PB7 - Y2 2

J7 Pin_2 - R11 P1

U2 (PCINT6/XTAL1/TOSC1)_PB6 - Y2 1

U2 PB5_(SCK/PCINT5) - J4 SCK

U1 (PCINT3/OC2A/MOSI)_PB3 - J3 MOSI

U4 TXD - U2 PD0_(RXD/PCINT16)

R16 P2 - R17 P1

U2 VCC_2 - U2 AVCC

U1 GND_2 - U1 GND_3

U5 GND_TAB - J3 GND

U2 GND_2 - U2 GND_3

Not Recommended for New Designs

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Project Name

SMC3 3DOF Motion Controller

Description

Arduino-compatible SMC3/SimTools 3-DOF motion controller for three 12 V worm-drive motors, Hall feedback sensors, dual USB-C interfaces, and E-stop safety input.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor	Qty 1
Arrow	$18.27–$22.81
Digi-Key	$31.25–$35.55
HQonline	$14.80
LCSC	$33.18–$34.54
Mouser	$26.64
TME	$8.91
Verical	$20.08–$35.20

Controls

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evanrowlands / SMC3 3DOF Motion Controller

Schematic