I’ve had this problem a bit before, but it has always eventually worked it self out…I changed the black print head and have been having this issue since. I’m having this problem with everything printed from this plotter. The spacing seems to be uniform no matter what size paper I use. I’ve spent a couple hours this morning updating drivers, cleaning the encoder strip, put another new print head in, and several print head alignments…all to no avail ><. Attached is a scan of what the plotter is spitting out. Help!!

---Edit---Changed all my print heads and it fixed the issue....