Telescoping Forearm — Length Adjustment

Concentric Cylinders • btSliderConstraint • Dynamic Mass & CoG • Prosthetic Design

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Arm Geometry

Collapsed Length 80 mm

Extended Length 150 mm

Outer Diameter 32 mm

Wall Thickness 2.5 mm

Number of Cylinders 3

Extension Control

Current Length 80 mm

Slider Damping 0.8

Slider Force 20 N

Constraint State

Lock Status

Unlocked

Extension %

Current Mass

0.15

CoG Offset

Presets

Display

Transparent cylinders

Show reach envelope

Show collision bounds

Show center of gravity

Telescoping Forearm — 3D

Verts: — • Tris: — • Length: 80 mm

Arm Specifications

Min Length	—
Max Length	—
Travel Range	—
Outer Diameter	—
Wall Thickness	—
Num Segments	—
Total Volume	—
Density (TPU)	—

Cylinder Segments

Generate to show segments.

Physics State

Constraint Type	btSliderConstraint
Constraint Bodies	—
Constraint Axis	X (longitudinal)
Restitution	—
Damping	—
Power Control	—

Slider Constraint Theory

btSliderConstraint: Constrains two rigid bodies along a single translational axis. Perfect for telescoping mechanisms. Supports linear and angular springs, Motors target position.

Dynamic CoG: As extended volume changes, center of gravity shifts. Physics engine accounting for this ensures realistic balance behavior.

Mass Scaling: Extended arm = more material (or pneumatic pressure) = higher mass. Affects inertia and motor requirements.

Prosthetic Use: Adjustable reach via motorized telescoping enables adaptive grasp and placement distances without repositioning the entire limb.

Export

Ready. Adjust geometry and extension length.