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WSAL22346 – DCGM-3865-12V-EN-240RPM/en

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Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The Waveshare DCGM-3865-12V-EN-240RPM is an L-shaped permanent-magnet DC geared motor with an integrated magnetic Hall encoder. It is designed for space-constrained applications such as small robots or self-balancing two-wheeled vehicles.

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Technical overview

  • The L-shaped housing suits robots with small wheelbases and tight installation spaces.
  • The gear train is made entirely of metal gears; the reducer has no self-locking feature, so the output shaft can be turned by hand.
  • Operating voltage is 12 V DC.
  • No-load speed reaches up to 240 rpm at a no-load current of at most 0.15 A.
  • Rated load is 4.0 kg·cm at a rated speed of 125 rpm and a rated current of at most 1.0 A (about 5.2 W).
  • Locked-rotor torque is at least 8.5 kg·cm at a locked-rotor current of at most 3.5 A.
  • The built-in 13-wire Hall encoder provides a base resolution of 13 PPR; with the 1:42 gear reduction this yields an effective resolution of 546 PPR.
  • Connection uses a PH2.0 6-pin connector with fixed pin assignments for motor power and encoder signals.

Commands and examples – verify before use:  

Pin 1: M2 – motor power supply (second phase)
Pin 2: Encoder VCC positive (5 V / 3.3 V)
Pin 3: C2 – encoder phase B
Pin 4: C1 – encoder phase A
Pin 5: Encoder GND negative
Pin 6: M1 – motor power supply (first phase)

Notes and version constraints

  • The exact encoder supply voltage (5 V or 3.3 V) must match the target microcontroller; the source lists both values but does not state which applies here.
  • Because the gearbox lacks self-locking, the output shaft can rotate freely without drive force – additional mechanical retention is needed for position-holding applications.
  • Exact mechanical dimensions and mounting holes are not specified in the provided text; consult the 2D drawings (DXF/PDF).
  • Torque figures given in kg·cm should be converted to SI units (Nm) if the control software expects Nm.
  • Whether the motor suits a particular use case depends on the load profile and ambient temperature; that information is missing from the source material.

Source and revision record

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