JPS62236774A - Printing speed control system of dot serial printer - Google Patents

Abstract

PURPOSE:To enhance throughput, by performing control for performing printing at a plurality of lateral feed speeds with respect to the same printing mode and control selecting an optimum printing speed. CONSTITUTION:When the same printing is performed at two lateral feed speeds, it is selected that printing is performed at which one of the lateral feed speeds in a first step 1 and the selection is determined on the basis of the length of a constant speed area. In the next steps 2, 4, respective lateral feed speeds are set and, in the next steps 3, 4, printing timings are set. A usual lateral feed speed S1, printing timing T1, a lateral feed speed S2 slower than the usual one S1 and the printing timing T2 in this case are shown. Between S1, S2, T1, T2, there is relation of S1.T1=S2.T2=P (wherein P is lateral dot density) and it is shown that both of them can be printed at the same lateral dot density under this condition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing speed control method for a dot serial printer, and particularly to a control method for improving throughput and optimizing printing speed.

[Conventional technology]

Conventionally, the traverse speed of dot serial printers has been unique to each printing mode, and printing has been performed at the same lateral speed regardless of the content of print data.

[Problem that the invention seeks to solve]

In the conventional multi-speed horizontal feed control method described above, the speed in the constant speed region and the number of steps in the multi-rise region are constant depending on the print mode, so the speed in the constant speed region and the number of steps in the multi-rise region are However, in the case of print data in which the trailing edge is longer in multiple areas, there is a drawback that control such as reducing the number of steps to shorten the time required for the entire printing cannot be performed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printing speed control method for a dot serial printer that eliminates these drawbacks and optimizes the printing speed. [Means for Solving the Problems] The configuration of the present invention is that in a printing speed control system for a dot serial printer that can control printing at a plurality of horizontal speeds for the same printing mode, one of the horizontal speeds υ is The present invention is characterized in that the optimum speed for increasing the throughput t- is selected from , and printing is performed by setting the printing timing corresponding to the optimum speed.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a flowchart explaining one embodiment of the present invention;
Figure 2 (al~(dl) is a characteristic diagram showing the effect when the cross-feeding speed and the number of steps are reduced to half under the condition that the printing section is short in this embodiment. , (b)
is standard speed, Fig. 2 (C1, (dl is standard speed)
This shows the case where the speed is increased to a speed of 10 with the same acceleration in the number of + steps. Also, FIG. 2(a).

(Figure C1 is the relationship between speed and number of steps, Figure 2 (b)
, (d) shows the relationship between speed and time.

In this example, since the cross-feeding multi-speed is halved, the constant-speed state time is doubled. However, since the number of steps in the rise and fall areas is reduced to shorten the time required for these steps, as a result, the time required for overall printing is shortened by slowing down the cross-feeding speed.

The flowchart in FIG. 1 shows a case where all the same printing is performed at two traverse speeds.

In the first step 1, which cross-feeding speed is to be used for printing is selected. This is determined by the length of the constant speed region.

In the next step 2.4, the respective lateral feed speeds are set, and in the next step 3.5, the printing timing is set. In this figure, a normal traversal multi-speed S1 and printing timing T1 are shown, and a lateral feeding speed S2 that is slower than normal and the printing timing T2 in that case are shown, respectively. In order to keep the same printing result at a slow horizontal feed speed S2, print timing T
2 also need to be slowed down, these 81*s.

The following relationship exists between Tl' and T2.

Sl·TI=82·Ill, =p In this case, P represents the horizontal dot density, indicating that both can be printed with the same horizontal dot density under these conditions.

〔Effect of the invention〕

As explained above, the present invention has the effect of improving throughput by having control for printing at multiple horizontal speeds for the same printing mode and control for selecting the optimum printing speed. be.

[Brief explanation of drawings]

FIG. 1 is a flowchart explaining one embodiment of the present invention;
FIG. 2 (al~(dl) is a characteristic diagram showing the relationship between the cross-feeding multi-speed, the number of steps, and time in the two-way cross-feeding multi-speed of this embodiment. 1-5...・Processing step.

Claims (1)

[Claims] In the printing speed control method of a dot serial printer that can control printing at multiple horizontal feed speeds for the same printing mode, the optimum speed for increasing throughput is selected from among the horizontal feed speeds, and the optimum speed is supported. A printing speed control method for dot serial printers that prints by setting the print timing.