Ramp and Shift Motion Printer Control
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08
A technique is described whereby a ramp and shift mechanism is applied to a print head motor drive system for a wire matrix printer to insure complete rotational tilting motion of the print head when driving against a variable mechanical load. Print head motor drive systems which drive print heads at a controlled velocity may also be required to exert forces against the side frame so as to establish left margin print starting positions and to shift the print head via a mechanical mechanism into one of two print positions. Pressing on the sideframe so as to rotate or tilt the head into a selected print mode requires large forces to be applied to the shift mechanism. It is important to prevent the forces from being transferred to the sideframe in the form of high velocities once the lever mechanism is shifted.