Print hammer flight time control system.

摘要

@ A hammer timing control system for the print hammers of a line printer uses a plurality of read/write RAMs (24-30) in place of individual ,fire control circuits for controlling the firing periods of the hammers. A delay value RAM (90) stores individual delay values to be interposed before each hammer is fired, and a terminate fire RAM or register (84) stores a delay to be interposed before the firing of a hammer is terminated. The hammers are turned on and turned off by signals incrementally clocked out from two pairs of RAMs which store each hammer address at memory locations corresponding to the hammer's assigned delay values.