Hi Myron,
thanks for your detailled feedback. I think I need to clarify my case: it is not about general refilling of cartridges but about charging the ink leading system between the ink-receptor pins, via the ink tubes (the R3000 has ink tubes, like an built-in CIS system) to the print head / nozzles. Usually this system is only charged with ink when you put a new printer to use. The initiation procedure for the R3000 includes an initial ink charge, taking ink from the cartidges and filling up the ink leading system all the way to the nozzles.
Since I experiment with replacing color ink on the color channels with bw ink, I need to flush a channel, and refill it with bw ink. This may happen more than once. However, since I have been doing that kind of work on the R3000 I have complete ink channels fail on me, i.e. there is no ink at all coming from some of the channels I have manipulated as described. Right now I have even the cyan channel failing, since I am right now working on the printer - despite I have not touched it. I have no clue why this is happening. Am I messing up something? Or is it air in the system, as I was suspecting in my prior post?
Anyone out there having seen similar behavior?
Regards,
Amin