Hello. I have a Mimaki JV33BS Plotter (1.6m print width). Suddenly as from couple of weeks ago the plotter started printing some black dots everytime there is an image or color to print. This dots are printed in a steady or repetitive and consistent pattern independently of the file or art being printed. When there is a blanck area a the beginning of the art or image there are no undesired dots printed. This dots are (when printing at 4 or 6 pass) a line around 1 inch lenght and paralled to the head printing direction. 1 line like the above described is printed always at 60cm of the width of the printing area and reapears approx. every 10cm in the direction of advance of the material. When printing at 8 pass, the line is reduced in length and reapprears every some 4cm of adavance of the material. Hopefully anyone have an idea of the problem cause and how to solve it. I appreciate any assitance. Merry Christmas! My name Roberto Bastida and live near Mexico City,