the failure by printing is sudden let's say that it can not be predicted. example makes 3 impressions well and fourth does not. Then it does a good that would be the 5 and the sixth no, it is something variable. I have the program but it is somewhat confusing how the impression is executed I have written some example but it is not yet clear to me. But on the part of the communication parameters.
I attach a couple of photos, where in one comes the complete impression and the other incomplete that is always the last part of the cycle.