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What is OSSM?

OSSM (pronounced like “awesome”) is an open-source, servo-powered sex machine built around a belt-driven linear rail. You can assemble it yourself from printed parts and readily available hardware, or start from a kit. OSSM emphasizes quiet operation, high torque, and software-defined control of stroke and depth.
OSSM’s actuator enables precise, repeatable motion with adjustable depth, speed, and patterns. Typical builds reach up to 1 m/s stroke speed with strong thrust at any rail position.

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Video introduction

Watch this short introduction as Latex Barbie walks through her custom OSSM build and setup.
I’ve tried other sex machines that stalled with larger toys or at longer strokes. OSSM handled those scenarios reliably, and I was able to build it myself in colors I love. The build process was straightforward, and the performance is smooth and powerful. Thanks, Research and Desire.

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Performance overview

A standard OSSM build delivers the following capabilities (actual performance depends on motor, power supply, rail length, and configuration):
  • Top speed: up to 1 m/s
  • Stroke length: ~8 in (20 cm) with a 350 mm rail; longer rails support longer strokes
  • Force output: 40+ lbf (≈18+ kgf) in typical configurations
  • Control: software-defined stroke, depth, speed, and patterns
Values above reflect commonly used configurations and parts. Your exact results may vary based on chosen motor, voltage, and rail length.

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Why build an OSSM?

  • Fine-grained control: Adjust depth, stroke length, and speed in software, and switch patterns on the fly.
  • Quiet and compact: Belt-driven actuator and efficient motor design support discreet operation.
  • Mod-friendly: Open designs, printable parts, and community mods make customization straightforward.
  • Great for learning: Build skills in 3D printing, mechanics, electronics, and embedded software.

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Design principles

Compact and quiet

Designed for discreet storage and operation without disturbing others.

High performance

Servo-driven actuator provides consistent power, precision, and repeatability.

Affordable

Uses readily sourced components and 3D‑printed parts; build at your own pace.

Fully moddable

Open-source hardware and firmware encourage community innovation.

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Safety first

Before use, verify secure mounting, clear pinch‑point zones, and smooth actuator motion. Start at low speeds, increase gradually, and stop immediately if anything feels unsafe or unusual. Keep fingers, hair, clothing, and cords away from moving parts.
OSSM performs a homing routine on startup. Ensure nothing obstructs travel before powering on.

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Where to go next

Use these guides to assemble, wire, and update your OSSM:

Wiring your Gold Motor

Correctly wire the 57AIM series motor and connectors.

Program your motor

Configure third-party motors before first use.

Flash firmware

Update OSSM or RADR using the web flasher.

Wireless Remote quick start

Pair and control OSSM with the Research and Desire Wireless Remote (RADR).

Device support

See supported devices and integrations.
You’re ready to begin: gather parts, review the safety notes, and follow the wiring and flashing guides. Once homing completes without issues, proceed to tuning patterns and controls.