HOME / Solutions / Sewing-Specialized RFM

Learns the skills of expert workers: Sewing-Specialized RFM

A robot foundation model that learns vision, hand motion, physics and spatiotemporal data together to perform straight and curved flat sewing of unstructured soft materials.

LTS VINA pilot under way Includes our own data glove
MOTUS RFM · Model architectureDiagram
INPUT STREAMSMODELOUTPUTVisionRGB-D wrist cameraHand motionFinger joints · glovePhysicsForce · tactile proxySpatiotemporalWrist 6-DOF poseMOTUS RFM · ACT-basedMultimodal encoderTransformer encoder · decoderLearns relations over timeAction chunking · continuous motion predictionImitation learning from expert demonstrationsAction chunk (future motion trajectory)ACTUATORActuator commandsTARGETExisting sewing machine · fixed cell
The architecture is a conceptual diagram
01 // Input data

Reads four signals at once

Expert work is recorded not as a single photo but as four signals over time.

01 · VisionRGB-D video

A wrist camera sees the fabric and needle area together with depth information.

02 · Hand motionFinger joints

Our own data glove records finger flexion and hand posture.

03 · PhysicsForce and touch

Force is read indirectly from workstation signals such as servo current and load cells.

04 · SpatiotemporalWrist 6-DOF

Markers track wrist position and orientation to align the timing of motion.

See our data glove →

02 // Model

Predicts motion in chunks

IMITATION

Imitation learning

The model learns to copy the same judgments and motions from expert demonstrations. People do not hand-write rules one by one.

ACTION CHUNKING

Action chunking

Instead of one step at a time, it predicts several steps ahead at once, so motion stays smooth and unbroken over fabric.

GENERALIZATION

Material generalization

The goal is a general model that works across many materials, not values tuned to a single fabric.

03 // Training pipeline

Grown by validating in the field

Validate first in simulation, then on the real line compare the model's judgments beside human workers before deployment.

01CollectGlove · camera02PreprocessSync · clean03TrainACT model04SimulateIsaac Sim05Shadow Modevs human work06DeployOn the lineField data returns to collection, so the model keeps improving
Shadow Mode is the stage where the model observes human work on the real line and only makes judgments.
04 // Development targets

Development targets set in numbers

100ms or lessControl latencyTime from seeing and deciding to moving
85% or moreSimilarity to expert motionHow closely it matches the expert's motion
8or moreNew materials handledHandles new fabrics without rebuilding from scratch

These figures are development targets, not achieved results.

05 // Hardware integration

Right on top of the existing sewing machine

FIXED CELL

Fixed cell

A fixed, non-moving cell needs no legs or battery. It mounts beside the existing sewing machine.

ACTUATOR

Actuator sourcing

Actuators are bought in volume to cut cost, and differentiation lives in software.

ROS

Vendor independence

The whole stack is ROS-based, so robot arm and hand vendors can be swapped.

06 // Roadmap

From pilot to field deployment

NowLTS VINA pilot under way

The goal is for the robot to perform straight-seam motions in a real factory.

2027Straight sewing in the field

Measure success rate, cycle time and defect rate.

2027Curved sewing demo

The goal is a successful curved-sewing demonstration.

2027Additional PoCs

Expand to other factories making the same products.

See Data Flywheel →

07 // Our own data glove

A data-collection glove built for sewing

Instead of a general-purpose glove, MOTUS's own collection glove is designed around sewing motions and fabric tension.

First build complete Oct 2026
Prototype data glove with wires and a board, and a hand model shown on screen
First prototypeHand pose is shown on screen in real time.
Pressure sensor array laid out on film
Pressure sensor arrayUnder review for integrating fabric-tension sensing.
08 // Why our own glove

Designed around sewing motions

Training a robot requires collecting many experts' hand skills over a long time. A glove that does not suit sewing misses the information we need.

FIT

Designed for sewing motions

Focused on reading the fine hand motions of gripping, pushing and pulling fabric, and its tension.

OPEN

Open, ROS-based structure

Collected hand poses go straight out via ROS into MOTUS's training pipeline, and parts and vendors can be swapped.

09 // Configuration

Many sensors read hand movement precisely

Each finger has a flex sensor measuring flexion, and an IMU on the back of the hand measures hand posture and movement. EMF (electromagnetic field) sensing to improve precision and a pressure sensor for tension are under review.

Sensor layout

Different sensors cover finger flexion, hand posture and tension.

IMUBack of handWrist control boardFlex sensorFlexion → joint anglePressure candidateTension · under reviewIMUPosture and motionControl boardCollect · to ROSThumb
Conceptual diagram; actual sensor count and positions may change during development.
Done

Flex sensors + IMU

The first build collecting finger flexion and hand posture was completed in October 2026.

In development

IMU drift-correction software

Software corrects the posture error that builds up over time.

Under review

EMF (electromagnetic field) sensing

We are reviewing using magnetic fields to read absolute hand position and posture, correcting IMU error and raising precision. Interference from sewing machine motors and metal needs on-site validation.

Under review

Pressure sensor for tension

We are also reviewing pressure sensors to read how hard the fabric is pulled.

10 // Data flow

From raw signal to training data

Glove signals pass through calibration to become a hand-pose stream, which feeds MOTUS RFM training directly.

SENSORFlex · IMURaw signal captureSOFTWAREDrift correctionIn developmentROS TOPICHand-pose streamVendor swappableDATASETRFM trainingACT input
The configuration is a design direction.
11 // Core challenge

So error does not build up over time

An IMU accumulates angle error over time. To collect reliably through long work hours, that error must be corrected; MOTUS is developing its own correction software and also reviewing EMF sensing to secure a reference point.

IMU drift and correction

The goal is that error builds up before correction and stays constant after.

+0-0 minElapsed timeBefore: error accumulatesAfter: error stays flat
Conceptual graph, not measured values.
12 // Tension sensing

Record even the force of pulling the fabric

Expert workers sew feeling the fabric's tension in their fingertips. To capture that as data, we are reviewing pressure sensor arrays. These are samples of candidate sensors for the glove.

Pressure sensor array film laid out in the shape of a handCandidate pressure sensor array (under review)
13 // Comparison

How is it different from general gloves?

General-purpose motion-capture gloveMOTUS own glove
Design purposeGeneral hand trackingSewing motions and fabric tension
Tension sensingNot applicablePressure sensor under review
SoftwareSeparate integration neededROS-based, direct to training pipeline
StatusCommercial productFirst build complete (Oct 2026)
14 // Roadmap

From the field to robot data

STEP 1 · DoneFirst build

Implemented hand-pose collection with flex sensors and an IMU.

STEP 2Calibration software

Corrects drift so collection stays stable over long work.

STEP 3EMF · tension sensing integration

Review EMF and pressure sensors and integrate them into the glove.

STEP 4Field deployment

Deploy to the factory, and once robots are deployed, switch the collector from people to robots.

One factory's success calls the next factory

We welcome inquiries about sewing automation, data collaboration and investment.

MOTUS Inc.

MOTUS Inc.
Republic of Korea (Seoul) · Room 302, Seoul Startup Hub M+, 14 Magokjungang 8-ro, Gangseo-gu, Seoul
Republic of Korea (Gangwon) · 3F, 500, Seowon-daero, Wonju-si, Gangwon-do
Vietnam branch · 2nd Floor, 793/43 Tran Xuan Soan St., Tan Hung Ward, Ho Chi Minh City