Im using a 2638x to print on glass with a special glass ink. We were printing for over two months with no problems. Started having nozzles drop out. Changed dampers, no changes. Changed heads, still having drop out. Moved the ink lines from bad channels to good channels the problem did not move. Stayed in the original problem channels. If I manually pull suction I can get some of the channels to come back but as soon as I do a cleaning the channels go away. I've been trying to fix the problem for over two weeks now and cannot get anywhere. Any suggestions are welcome.
thanks
geo
thanks
geo