Spindle

A spindle of a large format printer for selectively supporting a single roll or multiple rolls of print medium, the spindle comprising:

• two elongated roll supports for supporting rolls of print medium;
• a differential disposed between the two elongated roll supports, the differential having two outputs, each differential output being connected to one of the roll supports;
• a drive;
• a transmission shaft extending from the drive, through an interior of one of the roll supports to the differential, such that an equal amount of torque is transmitted from the drive through the transmission shaft and differential to each of the elongated roll supports;
• and
• a blocking arrangement for selectively preventing the two elongated roll supports from rotating with respect to each other such that a single roll of print medium spanning a portion of each of the roll supports can be printed on.