Trying to figure out what the heck is going on with my UM2. I've had several great prints, then for the last week or so, every time I try to print, I get results like these...
The printer head is clean, as is the print bed. I've tried 210/60, 215/60, 220/60, 210/70, 205/60, all with the same results. I've tried different filaments (Ultimaker silver, Colorfabb black, Colorfabb gray), all with the same results. I've tried printing on blue tape and without blue tape but with stick glue on the bed. Same results.
The damning thing is that I occasionally get good prints, then this happens several times in a row. Nothing seems consistent about this, and it's driving me mad.