slipvinkel

Slipvinkel is a term used in some discussions of mechanical engineering and robotics to denote a small, controlled angular offset that arises at a sliding interface when relative motion occurs. In modeling, slipvinkel describes the angle through which a connecting member appears rotated due to surface slip between contacting parts, such as a slider in a linear guide or a joint with frictional play. The concept is used to improve accuracy in kinematic simulations by including a slip-induced angular component alongside translational displacement.

Origin and usage: The word appears in informal technical writing and hobbyist literature as a compound of slip (to slide) and vinkel (angle in several Germanic languages). It is not a formal standard term in major engineering handbooks, and definitions vary by context. Some authors treat slipvinkel as an instantaneous quantity defined by the relative sliding velocity and friction coefficient; others define it as a function of load, material pairing, and surface finish.

Measurement and modeling: In practice, slipvinkel can be estimated from experimental data or predicted with tribology-informed models, combining Coulomb friction with rigid-body kinematics. It is often incorporated into simulation as a small rotational spring or a constraint error term in multibody dynamics. Typical magnitudes are small compared with larger misalignment angles but can accumulate in precision assemblies.

Applications and relation: Slipvinkel is discussed in the context of linear guides, robotic joints, gear racks with backlash, and sliding bushings. It helps explain observed deviations between commanded and actual motion and informs design choices to minimize friction-induced angular error. See also: slip angle, backlash, tribology, multibody dynamics.