The Control Method of Automatic Stop at TDC Accurately in Speed-adjusting Press

Up to now,in the design of speed-adjusting press,the control of the press stop at top dead point (TDC) is usually through different cams as per different speed range.But this method has some deviations in the stop position which also needs more PLC control points.A new control method has been introduced in the text.The encoder has been used to calculate accurately the stop point deviation from the TDC and adjust the braking angle automatically,which makes the press stop at the TDC accurately.