Thanks for the feedback. This supports the statement that there is definitely no reason for the auto-clean because if you're pumping out the numbers, and ink is passing through the head... why the need for an auto clean, ever?there are surely many factors that the printer use to start a cleaning. After this period of intense production I can tell that one is related to the number of prints.
In my case, about every 70-80 prints, it start. So in these days, with a daily production of about 150-160 black t-shirts, 2 cleaning a day were starting.
Normally one per day when the daily production is of about 90 prints. Less than one per day when the prints are few (30-40).