- Joined
- Jun 16, 2006
- Messages
- 3,645
- Reaction score
- 85
- Points
- 233
- Location
- La Verne, California
- Printer Model
- Epson WP-4530
You should only pay attention to the horizontal line segments. Each one is from a different nozzle. The vertical line segments are made up of all the nozzles corresponding to all the horizontal segments in that row so you will never see any gaps in the vertical lines unless there is a very large number of adjacent bad nozzles.
Sometimes, when you get a print head in a used printer, it will have a huge number of bad nozzles, which, as you describe, they gradually start working with repeated cleanings. You can never know with stubborn nozzles if they are burned out and will never work again or merely have a persistent clog, unless they fit a regular pattern, which is usutally indicative of an electrical problem. Unfortunately, it would be very difficult for the printer to figure out if it had clogged nozzles. It would have to have some optical sensors. But that is what you are for, to tell the printer if there are any clogged nozzles!!!
Sometimes, when you get a print head in a used printer, it will have a huge number of bad nozzles, which, as you describe, they gradually start working with repeated cleanings. You can never know with stubborn nozzles if they are burned out and will never work again or merely have a persistent clog, unless they fit a regular pattern, which is usutally indicative of an electrical problem. Unfortunately, it would be very difficult for the printer to figure out if it had clogged nozzles. It would have to have some optical sensors. But that is what you are for, to tell the printer if there are any clogged nozzles!!!
