Response from a collegue: In our IPlot "PEN" table, the syntax "midline_joint = circle" prevents spikes on text and line terminators. There's likely similar functionality in the MicroStation pen tables?
Attached Microstation plot driver and pen table. I am not using IPLOT.
Not sure why it didn't post correctly. Here's my settings:
stroke_tolerance=9.0 largest_polygon=200000 linecap = 0 ; 0=butt, 1=round, 2=square linejoin = 1 ; 0=mitered, 1=round, 2=bevel miter_limit = 3.0 ; larger values mean longer spikes ; 1=none, 1.415=90deg, 2=60deg, 10=11deg etc.