Sorter V2 Documentation

⚠ Under heavy construction

As of July 11, 2026, Sorter V2 is not yet in a position to be built.

The documentation that exists is incomplete. Any given page may be accurate, inaccurate, present only as an example, or badly out of date. We do not yet recommend that anyone attempt to build Sorter.

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Electronics — Stepper connectors

Stepper connectors

Reference

basically board v1.3 stepper pinout, the connector-to-motor mapping, and the connector reference.

All five stepper outputs on the board are identical.

1   basically board v1.3 connector pinout

Every stepper output connector on basically board v1.3 has the same pinout, pin 1 to pin 4:

PinNetCoil
1A2coil A
2A1coil A
3B1coil B
4B2coil B
12 34 A2A1 B1B2 coil Acoil B
Pin 1 (A2) is the square pad.
  • Holds for all five JST-PH 4-pin connectors: J23, J27, J31, J35, J39.
  • The parallel 2.54 mm headers next to each are wired identically: J24, J28, J32, J36, J40.
  • Pin 1 is the roundrect (square-ish) pad on the footprint.
  • Straight pass-through of the BigTreeTech TMC2209 module output order: module pins 3-6 = A2, A1, B1, B2, mapping to connector pins 1-4.

Coil rule. Pins 1-2 are one coil (A), pins 3-4 the other (B). Swapping the two wires within a coil only reverses motor direction. Splitting a coil across the 2/3 boundary is what actually breaks operation, so keep each pair together.

2   basically board v1.3 to motor connections

The 4 channel motors are NEMA 17 with their own JST-PH 6-pin socket, so cable S plugs straight into the motor and the shipped StepperOnline lead is not used. Two of the six motor positions stay empty. The chute motor ships as bare flying leads.

Stepperbasically board v1.3 connectorMotor connectorWire lengthGaugeNotes
Channels 1-4 (×4) JST-PH 4-pin (PHR-4) on J23 / J27 / J31 / J35 JST-PH 6-pin (PHR-6), the motor's own socket 1 m 24 AWG Board 1·2·3·4 lands on motor 1·4·3·6; motor 2 and 5 stay empty
Chute (5th) 4x1 dupont (2.54 mm) on pin header J40 Bare flying leads, crimp into a 4x1 housing unknown unknown Motor has no connector; crimp leads to the coil order above

Refdes-to-channel assignment (which of J23/J27/J31/J35/J39 is which channel, and which is the chute) is still to confirm.

Polarity, restated. The basically board v1.3 order is fixed (section 1). For channels 1-4 the cable re-orders positions so the motor coils match that grouping: the nets line up, the positions do not. Check the coils with a multimeter against the actual motor before crimping, chute included.

basically board v1.3 - PHR-4 1234 1346 25 NEMA 17 - PHR-6, positions 2 and 5 empty

3   Connector reference

  • 4x1 dupont (2.54 mm): board-side harness connector for the steppers, mates the 2.54 mm pin headers J24, J28, J32, J36, J40.
  • 2.54 mm (0.1") pin header, 4-pin: the board headers the dupont plugs onto (J24, J28, J32, J36, J40).
  • JST-PH 2.0 mm, 4-pin: also on the board (J23, J27, J31, J35, J39), same pinout as the headers.
  • JST-PH 2.0 mm, 6-pin (PHR-6): the NEMA 17's own motor socket, cable S's motor end (channels 1-4). Positions 2 and 5 are unpopulated. Contacts are SPH-002T-P0.5S, the same as the 4-pin.

4   Sources