IAI America SSPA - Manual (Page 68)

10. Options
60
Deviation
Measured value
Representative line
Straightness
Slider travel distance
Parallelism
(Reference)
[Measurement Method]
[1] Parallelism (horizontal) between the base reference surface and the slider (reference surface)
Affix the base on the surface plate and, with the indicator on the slider contacting a surface running parallel
with the two points at both edges of the base reference surface, move the slider over its entire stroke to
perform measurement.
[2] Parallelism (vertical) between the base mounting surface and the slider (work part mounting surface)
With the base affixed on the surface plate and indicator on the slider also contacting the surface plate, move
the slider over its entire stroke to perform measurement.
[Parallelism and Straightness]
Parallelism is represented by the maximum value on a graph of indicator changes measured by moving the
slider over its entire stroke.
Straightness, or degree of being straight, is represented by the maximum value among all measured results
of parallelism expressed by intervals between two straight lines.
Parallel plane: A plane parallel to the base reference surface (reference point of both ends)
Reference point Reference point