How to make a high-quality marking machine

How are high-quality cursor readers made? --- Nanhao Company

1. The marking machine adopts DSP chip, and a dedicated OMR main control board is designed with it as the core.
Compared with the industrial control board and A / D board used by our original 40C machine, the DSP main control board not only has a simpler circuit structure, more reliable installation, but also more powerful data processing capabilities, making card reading faster and more functional. Abundance, especially it does not exist the CMOS loss phenomenon sometimes appeared in the original industrial control board.
2. The marking machine is provided with RS232 and USB interfaces, which is convenient to connect with any PC and notebook computer.
3. The photoelectric sensor of the marking machine realizes the free adjustment of the original OMR photoelectric sensors produced at home and abroad. Most of them use precision potentiometers. After careful and repeated adjustments, the performance of the "electric eyes" of each channel (mainly linear and consistent) Co-reading card requirements. When the performance of the photoelectric sensor changes or is repaired, it must be carefully adjusted, and the work of adjusting the photoelectric sensor is technically strong for most users and is difficult to master. The new model does not need to adjust the potentiometer, as long as it takes a standard photoelectric detection card, it is automatically calibrated by the calibration program, which is very convenient.
4. The reading speed of the marking machine is adjustable in 8 levels, 1 level is the fastest, and the level 8 is the slowest, in order to adapt to different card reading needs, the fastest can reach 3 sheets / second (A4 paper)
5. The marking machine enhances the function of the command system, making the format file and application software more flexible and convenient.
The original command system has vacant positions in the data form (a group of options) or there are blank lines between the data form (the options in each group). It is troublesome to write format files, or there are too many data block definition commands (F commands) , Or prone to reading card errors (columns), or trouble writing application software; and the new command system, one F command can replace the original several or even dozens of F commands, and can avoid the previous reading error It can also reduce the trouble of software compilation.
6. The marking machine supports "seven selections"
The so-called "seven choices" refers to seven options, such as A, B, C, D, E, F, G, multiple choice questions. Commonly used in English standardized tests. The original cursor reader does not support the bottom layer, but is handled by the application software. The bottom of our model supports "seven choices", which is more convenient for users.
7. Can recognize 128 barcodes.
8. Machine-readable cards of different sizes can be mixed.
9. Cards with unevenly distributed sync frames, cards with longer or shorter blank areas before and after the sync frame can be read.
10. The photoelectric sensor sleeps in the standby state, which not only saves electricity, but also prolongs the life of the machine.
11. This machine adopts switching power supply with wide input voltage range, AC90V ～ 264V, 47 ～ 63HZ, which can be used by users at home and abroad.