Quote:
Originally Posted by ParisDakar
Discovered that the mill appears to cut maybe a thousandth deeper on the left than on the right, in the 6" plate width. Occurred on 2 or 3 of the plate faces, the other 1 or 2 were not as apparent.
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?
http://wiki.team1640.com/index.php?title=Sine_Plate |
Well you can touch, I've met people that can tell the difference of a few thou, by moving a finger.
The other would be to set up a light refraction to let them see the different bands of heights..