The problem in the earlier email was solved by agitating the carts.
However, now a new problem. Or, rather the same problem again.
First, I have been careful since the last event to do nozzle checks and print at least a couple of 8x10's each week, and have had no problems until yesterday. Started up to do a job and found large color shifts, mainly in the red/orange spectrum. Ran cleaning cycle and got all nozzles running except VM. After several cleaning cycles, that finally worked enough for me to finish the job. Took an hour break left printer on, and came back to find the VM clogged again.
This morning, ran another test sheet and all nozzles are good, except VM. Could this be dry nozzles due to humidity swings, which have been radical of late? I put a hygrometer out a hour ago, and it is showing 48% right now. Will dry nozzles correct themselves eventually with cleaning cycles (or without) in a 35%+ humidity range? Should I get some cleaning solution and run a clean cycle on all heads?
I purchased new ink earlier this year, but four new carts (not including the VM) have been replaced with what was left of the old ink from 2012. Yesterday, after talking with Wells, I did fill a new VM cart with new ink, but this did not seem to help.
So, I guess this may revolve around making sure a complete set of new carts filled with new ink is installed. Or, running cleaning solution through first before doing that. Or?????
Just to answer your questions from your earlier email; I agitate the carts at least once a month by taking them out and turning them up and down 4 or 5 times, then flicking them with my finger to dislodge bubbles. I then tip the entire machine from side to side three times to agitate the ink in the lines. When I refill, I shake the bottles until I can't see any sediment on the bottoms when held up to a bright light. I refill when carts are about 1/4 full.
Nearly all my printing is on Red River Polar Matte (greeting card stock), with some on Staples or HP double sided matte brochure and flyer paper. Lately, I have been printing on Staples 20# plain white inkjet paper occasionally. I use profiles for the Red River and Staples paper made with a Color Munki.
Thanks, I hope I have told you the whole story.