"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message
. 3.70...
"PrecisionmachinisT" fired this
volley in news:U5mdnREn5Ob7ZezMnZ2dnUVZ_qGdnZ2d@scnresearch. com:

My initial comment was directed only towards Lloyd, just in case the
option of using cnc to mill a slanted surface for use as a baseplate
instead of having to set up a sine plate had never occurred to him.

Ummm.... sorry.... I COMPLETELY missed that! I read your suggestion to
mean milling the finished surface on the part, not the baseplate! (slaps
head!)

Please ignore my prior post on this, and accept this one as the real
response.

While it's difficult to get my CAM to set up for precise start and end
points on a sloped 'side', it's easy as heck to set up a precise angle,
so long as you don't care about the start/end points within a few thou.


I tend to go a 1/2 inch or so past the edge of the part so that following
error is constant across the entire subject area..


So, yes... that would be faster than setting up a sine plate, most
especially for setups I'd be using more than once.

The surface finish doesn't matter much, so long as the overall angle is
held monotonic over the whole surface.


Run a finish pass 010 or so deep at max feedrate with feedrate lockout
active.