ESCPOS打印机图像出现故障



我正在从事一个项目,该项目读取来自通用源的数据,使用秋千形成图像,而不是将图像(一排图像)转换为ESCPOS命令并将其发送到打印机。

要将图像传输到ESCPOS代码,我使用了Java-Escpos-image印刷材料,但有一个较小的更改:

            int n = 0;
            bos.write(printerSchema.getLineSpace24());
            for (int y = 0; y < image.length; y += 24) {
                // Like I said before, when done sending data,
                // the printer will resume to normal text printing
                if (n == 2) {
                    bos.write(printerSchema.getCutPaper());
                }
                bos.write(printerSchema.getImageMode());
                // Set nL and nH based on the width of the image
                bos.write(new byte[] { (byte) (0x00ff & image[y].length), (byte) ((0xff00 & image[y].length) >> 8) });
                for (int x = 0; x < image[y].length; x++) {
                    // for each stripe, recollect 3 bytes (3 bytes = 24 bits)
                    bos.write(recollectSlice(y, x, image));
                }
                // Do a line feed, if not the printing will resume on the same
                // line
                bos.write(printerSchema.getLineFeed());
                n++;

改动是"切割纸命令",应该在第二行绘制第二行(物理上,打印机在切刀和打印机头之间都有很大的空间)。

)。

似乎都可以正常工作,但是有时我会随机收到缺失的第二行(总是在剪切命令之前),有时有缺少空间(第一行和第三行聚在一起),有时会带有空白。

打印机:SAM4S Giant-100命令:

    INIT_PRINTER = new byte[]{0x1B,0x40},//1B 40 Initialize printer
    IMAGE_MODE = new byte[] { 0x1B, 0x2A, 33 }, LINE_FEED = new byte[] { 0x0A },
    LINE_SPACE_24 = new byte[] { 0x1B, 0x33, 24 }, LINE_SPACE_30 = new byte[] { 0x1B, 0x33, 30 },
    CUT_PAPER = new byte[] { 29, 86, 1 }; // 1B 33 n

将问题定位到零件

if(n == 2){ bos.write(printerschema.getCutpaper()); }

未绘制的线。

您可以使用escpos-coffee库和用饲料打印图像这样可以正常工作:

            /*
             * to print one image we need to have:
             * - one BufferedImage.
             * - one bitonal algorithm to define what and how print on image.
             * - one image wrapper to determine the command set to be used on 
             * image printing and how to customize it.
             */
            // creating the EscPosImage, need buffered image and algorithm.
            URL imageURL = getURL("dog.png"); 
            BufferedImage  imageBufferedImage = ImageIO.read(imageURL);

            // this wrapper uses esc/pos sequence: "GS 'v' '0'"
            RasterBitImageWrapper imageWrapper = new RasterBitImageWrapper();

            escpos = new EscPos(new PrinterOutputStream(printService));

            escpos.feed(5);
            escpos.writeLF("BitonalThreshold()");
            // using bitonal threshold for dithering
            Bitonal algorithm = new BitonalThreshold(); 
            EscPosImage escposImage = new EscPosImage(imageBufferedImage, algorithm);     
            escpos.write(imageWrapper, escposImage);
            escpos.feed(5);
            escpos.cut(EscPos.CutMode.PART);

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