#PenPlotter maintenance today. My HP 7585B stopped responding over RS-232. Diagnostics revealed a problem with the interface card. Luckily I have a spare machine that can donate a new working card!
And it works! Here’s a video of the HP 7585B #PenPlotter plotting a big arc Truchet tile design using three colors (yellow, cyan, and magenta) on 11x15 watercolor. Total time 1h15m.
Video montage of a HP 7585 #PenPlotter plotting a design of large concentric arcs broken up by squares in cyan, yellow, and magenta. It performs tool changes to swap pens automatically.