Title:
IMAGE INPUT/OUTPUT DEVICE
Document Type and Number:
Japanese Patent JPH1042584
Kind Code:
A
Abstract:
To immediately stop a carriage when speed of a carriage motor in an image input-output device is abnormal.
The speed of a carriage motor is detected step by step, using an encoder sensor 20 and an interval timer 23. these speed data are inputted in a last timer value holding register 28 and a twice-before timer value holding register 29. A calculating device 30 estimates a present speed range from the past speed change of the carriage motor. If the speed of the present carriage motor exceeds an estimated range, the control of the carriage motor is judged to be abnormal, this forcibly stopping it.
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Inventors:
HASHIMOTO SHUNICHI
Application Number:
JP18930296A
Publication Date:
February 13, 1998
Filing Date:
July 18, 1996
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H04N1/04; H02P29/00; (IPC1-7): H02P5/00; H04N1/04
Attorney, Agent or Firm:
Yoshiki Okamoto
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