| This article is based on back gauge positioning mechanism which Influence on positioning-precision of paper feeding assembly of MW1050 Automatic mould-cutting machine produced by Shanghai Yahua Printing Machine Ltd. Co. Back gauge positioning mechanism has been done dynamic analytics and optimized. The main contents and innovations are as follows:1. It has analyzed kinematical principle of movable carriage and relation between back gauge positioning mechanism and movable carriage, pointed out kinematical principle of back gauge positioning mechanism. This provides the foundation for the dynamics analytics.2. It has made use of the concentration quantity method to get dynamics model of back gauge positioning mechanism, get dynamics respond and dynamics kinematics error, studied that back gauge have influence on the positioning accuracy of paper-feeding gripper.3. It has been built a testing system of actual running state of the mechanism which is applied to a MW1050 Automatic mould-cutting machine to measure actually and gets actual kinematical principle of back gauge positioning mechanism. Pass the contrast, verify the possibility of the dynamic model established in theories analysis.4. The research expresses that positioning error of back gauge positioning mechanism mainly depend on rise distance segment of slot cam outline at current workspeed. The author adopts two kinds of methods to proceed the correction to the outline curve, and proceed check of dynamic function outline curve after revising and analysis and contrasts, giving the outline processes parameter and providing consult basis for enterprise.Pass research of this article .it not only provide certain theories analysis and practical optimal method for improvement of mould-cutting machine, but also provide a method for usher of equipments in printing machine factories, and lay a foundation for further development of running state inspecting system of the device.
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