Part 4: Technical Reference

BJC-7100

2.5 Head Overheat Protection

If the temperature of the print heads of the BJ cartridges is allowed to rise beyond a set temperature, not only is there a risk of burns in the event that the heads are touched, but it becomes increasingly difficult to achieve optimum print quality. The printer is therefore equipped with an overheat protection function that uses thermal sensors in the heads to prevent the temperature rising above the set temperature.

Print head temperature detection is effected by independent sensors in the black head, optimizer head, color head, and photo head.

Protection level 1:

This protection level prevents the operator from touching the metal plate of a hot print head when changing the BJ cartridge. If, when replacing a head, the head temperature is higher than the temperature at which replacement is prevented, the printer displays a BJ cartridge overheat warning (and the beeper sounds 4 times). While the protection function is operating, the printer temporarily will not allow BJ cartridge or ink tank replacement.

Protection level 2:

The carriage returns to the home position after printing each line and waits for a maximum of 3 seconds to allow the print head to cool. This overheat protection mechanism continues for a minimum of 20 seconds.

Protection level 3:

If the head temperature continues to rise, the printer stops printing; the carriage continues to move and the paper is fed through the printer. The printer then discards any further data sent from the host PC, and performs cleaning operations, ink-out detection, and checks for failure of the head temperature sensor. If the printer determines that the ink or ink optimizer has run out, it displays an ink-out error when data is next received from the host PC. If the head temperature sensor is found to be faulty, the printer displays a BJ cartridge overheat error.

If the BJ cartridge head temperature sensor is faulty, the above overheat protection controls may not function correctly.

If it detects a fault in the head temperature sensor, the BJC-7100 printer displays other hardware error messages (the head temperature sensor error message may not be displayed correctly).

If the printer cannot recover from the overheat protection control operations to normal printing, or if other hardware error messages are displayed, replace the BJ cartridge. For details of how to recover from the respective error states, see Part 5, Section 6, "TROUBLESHOOTING" (page 5- 13).

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Canon QY8-1360-000 manual Head Overheat Protection, Protection level

QY8-1360-000 specifications

The Canon QY8-1360-000 is a highly regarded print head designed specifically for Canon’s line of professional printers, particularly those used in high-quality photo printing and graphic arts. This component is essential for achieving the vibrant colors and sharp details that are hallmark features of Canon’s imaging technology.

One of the main features of the QY8-1360-000 is its precision engineering, which allows for a high level of accuracy in ink application. This print head utilizes a micro-nozzle technology that enhances the distribution of ink onto the paper, minimizing the potential for blurriness or color bleeding. The micro-nozzles work in conjunction with a sophisticated ink delivery system, ensuring that colors are produced as intended by the original digital file.

Another key characteristic of the QY8-1360-000 is its ability to support a wide range of media types, ensuring flexibility for various printing projects. Whether it’s glossy photo paper, fine art paper, or even canvas, this print head can accommodate different textures and finishes, making it ideal for both professional photographers and graphic designers.

Additionally, this print head is designed to achieve high resolution printing, with capabilities that can reach up to 4800 x 1200 dpi. Such high resolution allows for exceptional detail and color accuracy, which is particularly critical when producing photographic prints. The print head can also handle a broad color gamut, facilitating rich and vivid color outputs that elevate the overall quality of printed materials.

Technologically, the QY8-1360-000 incorporates Canon’s FINE (Full-Photolithography Inkjet Nozzle Engineering) technology. This innovative technology allows for the quick heat-up and ejection of ink, ensuring rapid print speeds without compromising quality. By combining speed with precision, it significantly enhances productivity in a professional setting.

In summary, the Canon QY8-1360-000 print head is an essential component for anyone seeking exceptional print quality and versatility in their printing endeavors. With precision engineering, support for multiple media types, high resolution output, and advanced FINE technology, it represents a significant advancement in Canon’s commitment to delivering outstanding imaging solutions. Whether used in a studio, print shop, or home office, the QY8-1360-000 enhances the quality and efficiency of printing workflows, making it a vital tool for creative professionals.