Skip to main content
This page covers attaching toys and other end-effectors to your OSSM actuator. If you’re looking for how to mount the OSSM itself to a stand or surface, see OSSM Mounting.

​
What you’ll learn

  • Which attachment methods work with OSSM
  • When to use Vac-U-Lock vs. clamp vs. flange ring vs. tie-on
  • How to attach safely and verify a secure fit
  • How to troubleshoot common mounting issues

​
Prerequisites

  • A fully assembled OSSM actuator and stand
  • Your preferred toy(s)
  • The appropriate end-effector from your kit
Ready-to-Play kits include an end-effector set and ~3’ of paracord for tie-on mounting, plus an empty sandbag for stabilizing the stand. Fill the sandbag before play for best results.
All OSSM print files are also available on MakerWorld.

​
Attachment options at a glance

Vac-U-Lock

Industry-standard plug-and-socket system. Fast, secure, and ideal for toys designed for thrusting.

Harness-style clamp

Grips the base/neck of a wide range of toys. Great for toys without Vac-U-Lock compatibility.

Flange ring

Sandwiches the flange of suction-cup toys between printed parts and paracord. Included in Ready-to-Play kits.

Tie-on (paracord)

Flexible, lightweight option using the included cord and tie points. Useful for unusual shapes.
Choose the attachment that matches the toy’s base: Vac-U-Lock socket → Vac-U-Lock plug; smooth flared base or solid neck → clamp; suction-cup base with flange → flange ring; irregular shapes → tie-on.

​
Vac-U-Lock mounting

Use this when your toy has a Vac‑U‑Lock–compatible socket.
1

Prepare the hardware

  • Confirm your OSSM actuator is powered off.
  • Select the Vac‑U‑Lock end-effector from your kit and ensure the plug is clean and dry.
Avoid lubricating the plug itself—excess lube can reduce grip. Apply lube only where needed for play.
2

Seat the toy

  • Align the toy’s socket with the plug.
  • Press straight on with steady, even pressure until it bottoms out.
Tug test: pull firmly inline with the actuator. The toy should not detach or wobble.
3

Verify alignment and range

  • Align the toy as straight as possible with the actuator to reduce side loading.
  • Manually move the carriage along a short stroke to confirm there is no binding.

​
Harness-style clamp mounting

Use this when your toy has a flared base or a solid neck the clamp can grip.
1

Prepare the clamp

  • Power off the actuator.
  • Open the clamp and inspect the contact surfaces; ensure they are free of oils and debris.
2

Position and tighten

  • Place the clamp just above the toy’s base (on the firmer neck if available).
  • Tighten evenly until the toy cannot twist or slide.
Do not overtighten on soft materials—compress only until secure to avoid permanent deformation.
3

Test security

  • Perform a tug test inline with the stroke and a gentle twist test.
  • Start OSSM at low speed and short stroke to confirm stability, then increase as desired.
If the toy shifts under low load, reposition the clamp lower on the neck or increase clamping force slightly.
For very smooth toys, adding a thin, grippy barrier (for example, a soft cloth wrap) between the toy and clamp can improve holding power without over‑tightening.

​
Flange ring mounting

Use this when your toy has a suction-cup base with a flange. This system sandwiches the toy’s flange between two printed parts and secures it with paracord. Required components:
  • Flange Base (24mm threaded)
  • Dildo Ring (50mm or 63mm, matching your toy’s flange diameter)
  • ~3’ paracord (included with Ready-to-Play kits)
1

Thread the flange base onto the end effector

  • Screw the Flange Base onto the 24mm threaded end effector.
  • Secure with the 24mm nut (five-sided) from the opposite side.
2

Position the toy between the base and ring

  • Place the toy’s suction-cup/flange base flat against the Flange Base.
  • Set the Dildo Ring over the toy so the flange sits between the ring and the base.
  • Orientation: the ring faces away from the device; the base faces toward the device.
3

Secure with paracord

  • Thread the paracord through opposite tie points on the Flange Base.
  • Cross the cord over the Dildo Ring, pulling taut to clamp the ring against the toy’s flange.
  • Wrap in an X or figure-eight pattern to prevent rotation.
  • Finish with a locking knot (e.g., two half-hitches) and tuck or trim excess cord.
Keep even tension on both sides of the cord while tying to ensure the ring presses down evenly on the flange.
4

Verify the fit

  • Perform a tug test—pull firmly inline with the actuator. The toy should not shift or wobble.
  • Run a short, slow stroke to confirm the knots remain tight.
Re-check after 1–2 minutes of motion; paracord can settle on first use.

​
Tie-on (paracord) mounting

Use this for irregular shapes, suction-cup bases without flanges, or when you want a lightweight connection with built-in “give.”
1

Plan your lashing points

  • Identify two or more secure tie points on the end-effector and a position on the toy where the cord will not slip off.
2

Attach and cinch

  • Use opposing wraps to prevent rotation; finish with a locking knot (e.g., two half-hitches).
  • Trim or tuck away excess cord to avoid entanglement.
3

Safety check

  • Perform a tug test; the toy should not migrate under tension.
  • Run a short, slow stroke to verify that knots do not loosen.
Re-tighten after 1–2 minutes of motion—cord can settle on first use.

​
Best-practice checklist

  • Start every session with a short, low-speed test and watch for any slip or wobble.
  • Keep all contact surfaces clean and dry before mounting; apply personal lubricant only after the toy is secured.
  • Align the toy with the actuator’s stroke path; use your stand’s pivots to reduce side loads.
  • Stabilize the base. Fill and place the included sandbag on the stand as needed.
  • Inspect clamps, plugs, and cord for wear; replace if damaged.
Stop immediately if you feel unexpected resistance, hear unusual scraping or grinding, or see the toy migrating out of the mount. Re-seat and re-test before continuing.

​
Troubleshooting

  • Verify alignment with the actuator (minimize side loads).
  • Clean the toy’s neck/base and the clamp pads; re-tighten evenly.
  • For Vac-U-Lock, re-seat fully; avoid lube on the plug.
  • For tie-on, add an opposing wrap and re-cinch.
  • Shorten the stroke length slightly and increase speed gradually.
  • Check that the stand is weighted and on a firm surface.
  • Confirm the toy is centered and not flexing against the mount.
  • Adjust the stand’s pivot to keep the toy aligned with the stroke.
  • Reposition the clamp lower on the toy’s neck to reduce leverage.

OSSM Mounting (stands and bases)

Choose between the Extrusion Mount and the Basic Mount V2.

OSSM: Basic Mount V2

Build notes and BoM for the screw-down basic stand.

OSSM Extrusion Mount

Assembly and parts for the adjustable extrusion stand.

Flashing your OSSM/RADR

Ensure your device firmware is current before first use.