What machine and postp are running?
The wood grain appears to be running horizontally and the tearing seems
to only be where the toolpath changes from cutting along the grain to
perpendicular to it.
Do you see the same problem when cutting a harder material?
20 inches / min sounds like a sensible feedrate, but can you try running
even slower - say 10 ipm to see what the result is?
Please e-mail the VCarve Pro file that includes the calculated toolpaths
to - firstname.lastname@example.org
and we will take a look.
The picture also shows some rounding in the corners which is normally
related to the Z0 possibly being set a little low or the cutter having a
flat on the bottom - not a sharp point?
If the cutter does have a flat on the bottom then it's best to define this
as an Engraving Cutter in the Tool Database, and specify a Flat Diameter
to match the flat on the cutter.
Otherwise, calculating tololpaths for a V Bit cutter assumes the sharp tip
of the cutter will be set at Z0 (normally on the material surface). But if
a flat bottom cutter is actually used on the machine, then setting the tip
at Z0 on the material surface is actually setting the cutter too low.
Let me know if this needs more clarification?