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A method is described to minimize printer escapement control using a multi-stage matched move algorithm.
English (United States)
This text was extracted from a PDF file.
This is the abbreviated version, containing approximately
52% of the total text.
Page 1 of 1
Printer Escapement Control Using a Multi-stage Matched Move Algorithm
A method is described to minimize printer escapement control using a multi-
stage matched move algorithm.
In this method, the transition from zero carriage velocity to print velocity
which occurs at the beginning of a printed line, and the transition from print
carriage velocity to zero velocity which occurs at the end of a printed line, is
accomplished using a dual-stage matched move. In this technique velocity
command sequence is matched to the dynamic characteristics of the carriage to
minimize at the completion of th acceleration (or deceleration) phase of a
carriage move cycle the velocity error transient between the command sequence
and the carriage. Since the command profile can be matched to only a single
response mode of the carriage, the carriage dynamics must be adequately
described by a single mode in order for the technique to be effective.
A typical dual-stage matched move velocity profile is shown in Fig. 1, and
consists of three sequential constant velocity (synchronous) command
sequences. In Fig. 1, V0 is the initial carriage velocity, Vt is the target carriage
velocity, Vi is an intermediate target velocity, VC1 and VC2 are the stage 1 and
stage 2 command velocities respectively, and T is the carriage primary mode
half-period. The duration of each of the first two commands must be an integer
multiple (typically 1) of the damped natural half-period. The command velocity
amplitudes VC1 and...