Quote:
Originally Posted by ParisDakar
Should have been done first, but the mill should be leveled, and the head has to be trammed. The backlash in the lead screws needs to be adjusted, and the vise needs to be reset dead nuts on the table. None of this has ever been done, and I'm torn between involving students or not in these things. I How do you teach an appreciation of precision that can't be seen?
So we've got 2 plates ready to start machining to final dimensions. 
http://wiki.team1640.com/index.php?title=Sine_Plate |
Looks like a cool project! A good excercise to get students to appreciate the level of accuracy required is to have them try to make a perfect cube out of poorly cut stock. They will quickly realize that getting everything perfectly square is not as trivial as they might think! Unless the students have had a decent amount of shop experience, the cube will be out of square by enough to be easily measured with calipers.