HP 5528A User Manual

Model 5528A
Straightness and S
quar enc ss Co nsider at io ns
21-4
w
her e -
Y w ill be it calculated value. and
X is the distan ce trave ll ed alo ng the measurement path.
c. De termine what " Y" s hould be for each " X" along y our measurement path using the
equation
abo ve . This will be
d. Subtract
a ll th e va lu es y ou ca lc ulated in step "c" fr o m the va lu es yo u actually
meas ured with th e La ser Meas urem e nt S ys tem , leaving you with "tru e" Straightness
va
lu es
Y I rue "" Y LMS - Y slo pe
H ere is an example of calcu la ting " slo p e" and then "true" Straightness va lu es for t wo ax es of
meas
ur ement.
Th e important va ri a bl es are
m - slope of the mi salignment axis
b
... ilH erce pt of the m isa li gnment axis
x
= position of the machine al ong the axis of travel
Ytl
O pe
= va lue of the bias due to mi salignnment of the Opti c al straighte dge a xis
with the axi s of travel
Y I, ,, e "" true va lu e of the out -o f-straightness of the ma chine
YLMS = reading o n the laser dis pl ay
Th e ra w data is th e same as the dat a us ed in the example for the " End P oi nt Fit " met hod.
For
Axis 1 -
Our raw data is
YLMS = -0 .3, 0.9, 1.5, 2.5, 2.9, 3. 6, 4.2, 5.1, 5. 9, 7.2 ( mi crons)
X = 0.0, 0.1, 0.2, 0 .3 , 0.4, 0 .5 , 0.6, 0.7, 0.8, 0.9 (melre)
N umb er of points = 10

HP 5528A Specifications

General

Brand	HP
Model	5528A
Category	Measuring Instruments
Language	English