14
Selecting Straight Edge Length
To select the length of the straight edge, use the table below to see which length to use. It is recommended that you select
the straight-edge length that is less than 1.5 times the Grid Line Dimension, which ensures the best stability for the bar.
For example, for the 18x18 plate, use the 18 in. straight edge for the sides and midpoint segments and the 36 in. straight
edge for the diagonals.
We recommend that you assemble the longer straight edges (see above) before starting the alignment checks. This allows
you to easily swap in a longer or shorter bar as needed for each segment and speeds up the calibration process.
Here are some definitions for the table:
•
Plate Size
– this is the nominal dimensions of the plate from edge to edge.
•
Diag Bar Increments
– this is the total number of 18-in. increments needed for the straight edge.
•
Longest Bar
– this is the longest bar that is needed for the longest line segment (the diagonal).
•
Grid Line Dimensions
– this is the length of the plate side minus 2 x the border width. This represents the total length
needed for the measurements for that line segment.
•
Diag Angle
– this is the angle of the diagonal relative to the edges and is generally not needed for a measurement but
is for informational purposes.
Note
- if you use a straight edge that is too long for the plate, it will not be stable and may lead to errors.
Plate Size
Diag Bar
Longest
Grid Line Dimensions [(Length/Width -
(Border*2))]
Width
Length
Diag
Increments
Bar
Width
Length
Diag
Diag Angle
12
12
17.0
1.0
18.0
9.0
9.0
12.7
45.0
12
18
21.6
1.0
18.0
9.0
15.0
17.5
31.0
18
18
25.5
2.0
36.0
15.0
15.0
21.2
45.0
18
24
30.0
2.0
36.0
15.0
21.0
25.8
35.5
24
24
33.9
2.0
36.0
21.0
21.0
29.7
45.0
24
36
43.3
3.0
54.0
21.0
33.0
39.1
32.5
24
48
53.7
3.0
54.0
21.0
45.0
49.7
25.0
36
36
50.9
3.0
54.0
33.0
33.0
46.7
45.0
36
48
60.0
4.0
72.0
33.0
45.0
55.8
36.3
36
60
70.0
4.0
72.0
33.0
57.0
65.9
30.1
36
72
80.5
5.0
90.0
33.0
69.0
76.5
25.6
48
48
67.9
4.0
72.0
45.0
45.0
63.6
45.0
48
60
76.8
5.0
90.0
45.0
57.0
72.6
38.3
48
72
86.5
5.0
90.0
45.0
69.0
82.4
33.1
48
96
107.3
6.0
108.0
45.0
93.0
103.3
25.8
48
120
129.2
8.0
144.0
45.0
117.0
125.4
21.0
60
120
134.2
8.0
144.0
57.0
117.0
130.1
26.0
72
96
120.0
7.0
126.0
69.0
93.0
115.8
36.6
72
144
161.0
9.0
162.0
69.0
141.0
157.0
26.1
Содержание L-703SP
Страница 1: ......
Страница 54: ...50 An example on how to do the Math to get the exact flatness values...
Страница 55: ...51 Plane6 Sample Report...