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Abstract
The dynamics of a latch needle travelling with constant horizontal velocity through a symmetrical non-linear knitting cam are analysed in detail. Equations to calculate R and S—the reaction forces between the needle butt and cam face and needle butt and cylinder wall, respectively— are set up for any possible needle-cam contact and the boundary constraints described that determine that contact. A hypothetical knitting situation is examined with the aid of a simple harmonic cam shape.