ACTION 11

Reshaping

Changing an object's own shape to a target form, where the folds or curvature are created during the manipulation itself

Why It Matters

Tasks that change the shape of the object itself occur throughout tidying and sorting work. Examples include folding linens, refolding returned garments, and winding cables and harnesses.

Dedicated folding machines are limited to objects of uniform size and material. When the goal cannot be expressed as a rigid-body pose, the current shape must be re-observed at every step to decide the next contact point.

Skills 4

11-ADeformable Sheet Folding

Each fold becomes the reference for the next, so even small errors accumulate and throw off the final shape.

Deformable Sheet Folding — Initial state
Initial stateA sheet-like object lies unfolded.
Deformable Sheet Folding — Final state
Final stateThe sheet is folded to the specified dimensions.
C_geom appliesC_force does not applyC_contact appliesC_obs does not applyC_deform appliesC_dyn does not apply
E1 does not applyE2 appliesE3 does not applyE4 does not applyE5 does not apply

11-BLinear Object Winding

Winding requires repeated regrasping, and tension must be maintained throughout.

Linear Object Winding — Initial state
Initial stateA linear object lies unwound.
Linear Object Winding — Final state
Final stateThe object is wound to the specified diameter, and the tension holds.
C_geom does not applyC_force appliesC_contact appliesC_obs does not applyC_deform appliesC_dyn does not apply
E1 appliesE2 does not applyE3 does not applyE4 appliesE5 does not apply

11-CMouth Opening

Excessive force actually narrows the mouth, so the right amount of force must be found.

Mouth Opening — Initial state
Initial stateThe mouth of a flexible receptacle is closed.
Mouth Opening — Final state
Final stateThe mouth is spread open wide enough for insertion.
C_geom does not applyC_force appliesC_contact does not applyC_obs does not applyC_deform appliesC_dyn does not apply
E1 does not applyE2 does not applyE3 does not applyE4 appliesE5 does not apply

11-DUntangling

The object passes through itself and is locked in place, so pulling alone cannot free it, and the configuration that releases the lock must be formed.

Untangling — Initial state
Initial stateLinear objects are looped through one another and entangled.
Untangling — Final state
Final stateThe objects are disentangled and lie separately.
C_geom appliesC_force does not applyC_contact appliesC_obs appliesC_deform appliesC_dyn does not apply
E1 appliesE2 does not applyE3 does not applyE4 does not applyE5 applies