Festo CPX-CMAX-C1-1, Mounting, Installation And Diagnostics

Page: 37 / 176

2. F itti ng and p ne u ma ti c i ns t a ll a tio n
2 − 7
Fes to P . B E − C PX− CMA X−S Y S− EN en 0908N H
2.3.1 Gene r a l mec h an i ca l r eq uir emen t s
Note
Co nnec t th e d riv e , g ui de , d i s pl acemen t enc o de r and lo ad
with as little backlash as possible and a li gn th em flu s h
with eac h oth e r.
M ec h an i ca l back l as h, e . g . be tw een th e c yli nde r pi s to n ro d
and th e mass to be m ov ed , l eads to poor m ov emen t be
h a viour (th e back l as h pr esen t s th e c o n troll e r with c o n
s t an tly c h ang i ng mass ").
I m port an t for po s itio n i ng acc ur ac y :
Th e c yli nde r, g ui de , po s itio n meas uri ng s y s t em and lo ad
m u s t be ri g i d i n th e d ir ec tio n of m ov emen t, h a v e v e ry
littl e back l as h and m u s t be c o nnec t ed flu s h with eac h
oth e r.
Th e back l as h be tw een th e d riv e , g ui de , mass and po s itio n
meas uri ng s y s t em m u s t be sma ll e r b y a f ac tor of 10 th an
th e r eq uir ed tol e r ance ( ma x. 0.1 mm ).
Note
Tr ans v e r se lo ads f a l s ify th e meas uri ng r es ult s and c oul d
damage th e d i s pl acemen t enc o de r.
·
Use an e xt e r na l g ui de for th e e ff ec tiv e lo ad i n or de r to
pr e v en t tr ans v e r se lo ads o n th e d riv e .
·
Use m ou n ti ng a tt ac h men t s whi c h will with s t and th e
acce l e r a tio n for ces lo ng− t e r m .
·
If necessa ry, provi de a s uffi c i en tly l a r ge ene r g y c h a i n i n
or de r to m i n i m i se th e e ff ec t s of bend i ng for ces o n th e
po s itio n i ng be h a viour.