I have a 3880 and haven't changed carts too often yet. I'm getting low on four of them and have replacements in hand. The yellow warning triangles are showing up on my iMac for low ink, but it still keeps printing ok. When it gets to the "low ink" warning, it still seems to have a lot of life left in it - albeit for 8.5x11's.
When's the best time to change ink, if you want to maximize the cartridge? If I just keep printing, will the printer some day stop me from printing? Does it calculate how much ink it needs for each color and compute if it has enough to do the job? Cancelling the job when not enough ink is noticed? Or does it just print and stop mid way to reload a cart? Or do I loose one print when it runs out?
I haven't run totally dry yet, so I don't know what to expect.