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US 5,177,422 AGranted
Recording control system for a recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorsJunnosuke Kataoka, Masahiro Sakamoto
Life of this patent
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Abstract
The present invention relates to control of motor and strobe pulses in a printer which feeds a paper by a stepping motor and prints data by strobe pulses. A uniform record line density is attained by non-linearly changing currents and interval of phase excitation pulses for trigger of the motor and timing of the strobe pulses.
Claims9
A paper feed control system for a recorder comprising:
- a paper feed stepping motor;
- a driver for driving said stepping motor;
- and
- control means responsive to a drive trigger for generating a plurality of consecutive excitation pulses and applying those pulses to said driver in order, the control means generating each of said plurality of consecutive excitation pulses at increasing time intervals.
1 more element
A recording control system for a recorder comprising:
- a stepping motor for feeding a record sheet;
- a driver for driving said stepping motor;
- print means for printing data on the record sheet fed by said stepping motor, said print means printing data in response to receipt of strobe signals;
- and
- control means for generating a plurality of consecutive excitation signals and a plurality of consecutive strobe signals and for applying said excitation signals to said driver and said strobe signals to said print means, said control means delaying generation of a first one of the strobe signals more than it delays generation of a first one of the excitation signals.
2 more elements
Dependencies are inferred from the claim text.