What do you mean by saved?
Whats the longest one can sit without any negative effects?
I restored the heads of a Mutoh that had been setting for over 2 years. The cleaning gets tough after a couple of weeks of not using it so it is best to run it through a cleaning cycle once a day. The problem with low usage is that ink will start to accumulate in the waste tubes and plug up. The machine needs to be used constantly to keep everything working properly.
I did a nozzle check and here is a scan from it. How bad does it look?
It is not too bad. The cross contamination is from ink transferring through the cleaning station. a cleaning cycle ran once a day should help to prevent it. Running a print until it clears up and then rerunning the print should work. You're going to waste a lot of ink, parts and time maintaining the machine until you get enough work to keep it busy.
Cross Contamination... If this is a FO Printer you may need a new Maintenance Station or at the very least a new Capping Station...
New won''t help until you get more work. A new capping station will cross contaminate if the machine is not used. However, there are parts that will need to be cleaned out manually or replaced if you don't use them more often. For this machine the capping station is the maintenance station
The key here is to print, print and print. If you don't have jobs for it then make up your own. Print out bumper stickers, auto tags, advertising for the shop and so on. Don't let it sit doing nothing. This will also give you some practice on running the machine.
Some good sources for jobs are the city, recycling, parks and recreation, fire department and so on. Don't do any cut vinyl if you can just print it. Send out a mailing. The Chamber of Commerce can help with bulk mailing as well as helping to promote your business to the business community.