03-06-2012, 03:44 PM
I understand the difference between level and flat.
The parallel question would be related to given that I have created a level surface can I set the surface plate on it and have an expectation that the top of the surface plate will be level. The answer appears to be No.
Note that when I have had to level my surface plate I have used three screw jacks, my precision level and some time messing around to get the top surface level.
And as an example (not a useful one, just an example) of "parallelism" I would level the top surface of my surface plate and then put a 1-2-3 block on it and the top surface of the 1-2-3 block would still be level.
The parallel question would be related to given that I have created a level surface can I set the surface plate on it and have an expectation that the top of the surface plate will be level. The answer appears to be No.
Note that when I have had to level my surface plate I have used three screw jacks, my precision level and some time messing around to get the top surface level.
And as an example (not a useful one, just an example) of "parallelism" I would level the top surface of my surface plate and then put a 1-2-3 block on it and the top surface of the 1-2-3 block would still be level.