I've got the Robland X31 - with that sliding table. How different the
set up is as an Add On I have no idea. But here's how to adjust it
on the X31.
The eccentric bearings under the sliding table are "not obvious"
adjustments that let you
tune the sliding table's angle relative to the saw table top. So go
over this page and the
next page about them.
The X31 has a dovetail miter slot which allows things to be secured to
the saw table, unlike
US market "rectangular" miter slots. There's a jig for aiding the set
up of the sliding table
which uses this attachment method. Here's the url to the "modified rail
These jigs don't set the table (co-planer with the saw table top,
tracking parallel to the
miter slot) - but they do make things a LOT easier - the sliding table
table is pretty
heavy and not balanced on the rails so it wants to tip over.
Not sure if these jigs will work on an Inca.
If I can be of further assistance feel free to e-mail me.