Interesting to know how you get Z-axis Perpendicular to X-Y,
I mean in a way of higher precision, not so-so ...
I have gantry mill made from Aluminium, 1200mm x 450mm table, Z-180mm travel, Hiwin 15 rails, 4 cars per all axles, 16/5 ball screws, all is made by myself, Servo System and Soft I bought from http://www.imsrv.com/
All is rigid, no slack ... about my selfmade high speed spindle I have spoken
in http://www.cnczone.com/forums/showthread.php?t=12184 (pages 5 ... 7).
I can detect that Z axis is not perpendicular as fine I like ... for example I can see it when using fly cutter, very little but anyway - I want it perfect.
Any Instrument for this?
Regards,
Herbert