I've heard the grinding noise, and it usually does not damage the printer. I think it's the belt drive slipping on the belt. The carriage seems able to re-calibrate itself.
As to rinsing, I use distilled water for the first few flushes and then the C6b base. I do a few flushes where I pull most out with the same syringe in the reservoir as was used to fill the cart. I also use a bottom fill adapter to pull water and base through the outlet. You should be able to see when the fluid is clear.
Good luck with the setup.
Paul
On Sat, Feb 1, 2014 at 10:03 AM, <paulmwhiting@...> wrote:
A horrible thing just happened. I pulled those cleaning fluid carts to look at them and was ready to fill them with the C-6 inkset but didn't know how to empty them first. So I pressed the ink refill button, put them back in the printer and pressed the ink refill button again to reposition the carriage and I got this horrible grinding noise. I quickly pulled the power cord, and plugged it back, and the carriage went through all kinds of back and forth motion - then it finally settled down.
Did I damage anything? It was the most god-awful noise.
Paul W.