The reader sorter must know that the peak is there
This is why the placement of the waveform is so important and why the characters are shaped unusually. What Affects the Signal Level? Signal level can vary based on a number of factors. The amount of iron oxide (concentration) that Metal spinning factory is present in the character will affect the signal level. This is a function not only of the toner itself, but also of how it is laid on the paper and the pile height, which can be controlled by numerous other cartridge components (i.e., "hot" OPCs).The taller the vertical edge of the character, the taller the peak (either positive or negative). A vertical edge that is not regular and/or not vertical will result in a reduction in the amplitude of the peak and will flatten the peak out. Keys to proper waveform detection are:
All peaks in a character's waveform must be detected. The reader sorter must know that the peak is there. * The peak must be located at or near its anticipated location. * No significant "extra" peaks can be present. * There cannot be wide variations in the signal levels of peaks within a character. What to Look for in MICR Printers and ConsumablesPrinters that are used for MICR printing must have a unique MICR font that is modified to suit the unique printer engine, and it must be modified to the pixel level to match the magnetic toner provided for that printer. This is essential to ensure the correct waveform, dimension, and signal strength when a check is printed with the correct MICR characters.
In addition, the MICR font must meet ABA-X9 standards to ensure acceptance of your checks by banking institutions.The magnetic MICR toner that you choose must be specifically designed for the particular print engine in the printer. Ensure the toner has been thoroughly tested for consistent signal readings, image permanence and uniformity, and excellent edge acuity. Toner coverage must be solid with no extraneous toner lay down.OEM cartridges are always a safe (but more expensive) bet.
If you buy a "compatible" brand, ensure it has a new OPC drum, new primary charge rollers (PCRs), a new black velvet magnetic sleeve, and new image wiper blades. The hopper system must be filled with high-quality, low-abrasion MICR toner.The vendor you choose should use the latest and most advance MICR test equipment, such as a Verifier and Golden Qualifier to conform to ANSI X9 Standards. It is also recommended that the systems exceed U.S. and Canadian check printing standards.