Paul

 I have the template machined and will send
tomorrow..............looks  very good... the dowel pin holes are
tight... they were reamed for
 precision so could not be more than .002 off or it would not go
 on............

 Jarrett is sending me an updated file with this new and exact hole
 placement.  When I hear back from you,all is good ,I can get those
 plates out.....
 jeff

 OK Jeff. I'll take it down to Mazdatrix and try it out on a
couple of
 their RX8 engines. I have plenty of 13B around here.


 Paul Lamar

Who.. what... um..  what am I sending.. I must have missed
something.. let me
know what it is.. and I'll send away :)

Jarrett

I don't know. Jeff do you need some SW files?
BTW Jeff what cad cam software are you using.
Larry is using visa cam and he says splines are not a
problem. My local shop is using master cam I think.
No problems with splines.


Paul Lamar


From my experiance, it's not a 'problem' per-say it's more just a computing
overhead issue. If your CAM is set up to have a profile tolerance of say.. 0.0001"
[not that the machine is that accurate but you need accurate code to elliminate
the max deviation on the part] then it just takes that much overhead [cpu load]
to calculate what is, in effect a straight line or tangental curve.  On some CAM's
the tolerance can be set operation specific [SolidCAM is this way] and you
can 'cheat' this problem. On those ribs [where the splines are showing up]
the tolerance could be 10-thou and no-one would care.. on the holes
[that are cut w/ an end mill vs drilling-- Say the rear registratio hole] you'd simply
have to up the tolerance value again to get a 'in-tolerance' hole.

Fwiw

Jarrett