Counterspringing methods
Four ways to offset gravity on a linear lift. Each guide is self-contained: mechanism, physics, an interactive force graph, sizing calculators, CAD and assembly guidance, testing procedures, failure modes, and real robot examples.
Not sure where to start? The Selection Considerations lay out what to weigh — and which constraints rule methods out before you read their guide at all.
Elastic cord routed along the lift provides a spring force that grows with extension — simple, cheap, and imperfect by design.
Pre-stressed steel strip springs deliver nearly constant force over their full extension — the closest COTS match to a gravity load.
A constant-torque spring drives a drum; drum radius converts constant torque into constant linear force on the lift stringing.
A spring acting through a linkage, lever, or cam whose changing geometry shapes the force delivered to the lift over travel.