To provide a gravure printing machine increasing/decreasing a printing speed in a short period of time while suppressing a magnitude of registration slur within an allowance when the printing speed is increased/decreased from a normal state, and a control method of the machine.
For increasing/decreasing rotation speeds of plate cylinders 11b, 11c of poststage printing units 10b, 10c, if the rotation speeds are magnitudes within a predetermined range set in advance, a correction amount A of a predetermined magnitude set in advance is added to calculated operation amounts Δω1(t), Δω2(t) of motors, when the rotation speeds of the plate cylinders 11b, 11c are adjusted by controlling the motors 13b, 13c of the poststage printing units 10b, 10c. On the other hand, if the rotation speeds of the plate cylinders 11b, 11c are out of the predetermined range set in advance, the motors 13b, 13c are controlled based on the calculated operation amounts Δω1(t), Δω2(t) of the motors 13b, 13c without adding the correction amount A. At this time, a print speed condition is switched so that magnitudes e1, e2 of the registration slur is within a predetermined range set in advance.
IWASAKI KEISUKE
Hiroyuki Nagai
Katsuomi Isogai
Satoshi Nazuka
Junpei Okada
Hideyuki Mori
Yukihiro Hotta
Hiroki Kashima
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