JPH0260777A - Serial printer - Google Patents

Abstract

PURPOSE:To prevent a step-out even at low temp. and to perform a printing at a speed suitable for the effective use of a motor capacity at high temp. by changing a printing speed meeting an environmental temperature. CONSTITUTION:According to a value read from a temperature sensor 2, a control part 1 changes over speed control tables 3a and 3b to change over the speed of a transverse feed motor 5 and, simultaneously, change over the printing frequency of a printing head according to the speed of the transverse feed motor 5. Namely, the speed of the transverse feed motor is reduced at low environmental temperature and raised at high environmental temperature, whereby a control making the most effective use of the capacity of the motor can be conducted.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to serial printers.

[Conventional technology]

Conventionally, this type of serial printer has performed printing at a unique printing speed for each printing mode.

[Problem to be solved by the invention]

In the conventional printers described above, the motor torque tends to decrease and the load tends to increase when the temperature is low.

Therefore, the printing speed and start-up speed are set so that sufficient torque can be generated even at low temperatures, so even though the speed can be further increased at room temperature, printing must be done at the same low speed as at low temperatures. There was a drawback.

[Means to solve the problem]

The serial printer of the present invention is characterized in that it has a plurality of speed control tables that differ depending on the output of the temperature sensor, and that the speed control table for the traversal motor is switched depending on the temperature to change the printing speed.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

The control unit 1 switches the speed control tables 3a and 3b according to the value read from the temperature sensor 2 to change the speed of the lateral feed motor 5, and simultaneously changes the printing frequency of the print head in accordance with the speed of the lateral feed motor 5. In other words, when the environmental temperature is low, the speed of the lateral feed motor is reduced, and when the environmental temperature is high, the speed of the lateral feed motor is increased.
Control that makes the most of the motor's capabilities can be performed.

〔Effect of the invention〕

As explained above, the present invention has the advantage that by changing the printing speed according to the environmental temperature, printing can be performed at a speed that takes advantage of the motor's ability at high temperatures without step-out even at low temperatures.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1...Control unit, 2...Temperature sensor, 3
a... Speed control table a, 3b...
Speed control table b, 4...Print head, 5.
...Transverse feed motor. Agent Patent Attorney Shinkyo Uchihara

Claims (1)

[Claims] A horizontal feed motor that moves the print head in the paper width direction,
It has a temperature sensor that detects the temperature near the horizontal feed motor, and a plurality of speed control tables corresponding to the output of the temperature sensor, and prints by switching the speed control table of the horizontal feed motor according to the output of the temperature sensor. Serial printer characterized by variable speed.