Method for automatically acquiring initial reeling and unreeling radius of reel material printing equipment

The invention discloses a method for automatically acquiring initial reeling and unreeling radius of reel material printing equipment. The method for automatically acquiring the initial reeling and unreeling radius of the reel material printing equipment includes that feeding manually, guaranteeing that there is no material belt redundancy between an unreeling traction unit, an n-color printing unit and a reeling traction unit, eliminating the material belt redundancy of the unreeling region and the reeling region, emptying encoder values of servo motors of each unit, forwardly rotating the servo motor of the unreeling unit by one circle, recording the encoder value thereof, re-eliminating the material belt redundancy of the unreeling region and the reeling region, respectively recording the encoder values of the servo motor of the unreeling traction unit and the servo motor of the unreeling unit, and calculating the initial radius of an unreeling and reeling roller according to a material belt length conservation principle. The method for automatically acquiring the initial reeling and unreeling radius of the reel material printing equipment solves the problems of low efficiency and obvious error of a direct measurement method, improves the equipment control precision, and improves the automatic degree and production efficiency of the equipment.