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6 - 1
Z e r o p o i n t r e t u r n
( r e f e r t o s e c t i o n 7 . 2 ) .
This function is for the purpose of more accurate memorization
of the present position, and should be performed when turning
on the power unit or when a zero point return demand signal is
transmitted from the
KD71.
T h e
z e r o
p o i n t r e t u r n d e m a n d i s
transmitted when the power unit is
t u r n e d o n ,
a n d d u r i n g p o s i t i o n i n g w h e n t h e d r i v e u n i t r e a d y
s i g n a l i s OFF.
U p o n c o m p l e t i o n o f z e r o p o i n t r e t u r n ,
t h e
d e -
m a n d s i g n a l i s t u r n e d OFF.
T h e p r e s e n t p o s i t i o n i s p r e s e r v e d d u r i n g power f a i l u r e s , b u t
y o u s h o u l d m a k e i t a p r a c t i c e t o p e r f o r m z e r o p o i n t r e t u r n w h e n
t h e p o w e r i s
restored.
-20-
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