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Chapter 2 Definition and Connection of Interface Signal
399
Ⅲ
Connection
D: As the proximity switch touches the tongue for the second time, the zero signal is active and
the movement stops. The zero return indicator on the panel lights up for machine zero return
completion.
When the BIT0 (ZMX) of the bit parameter No.006 are all set to 1, and the BIT5(DECI) of the bit
parameter No.004 is 0, it chooses the machine zero return mode C.
The sequence of machine zero return mode C is shown as follows:
D e c e l e r a t i o n s w i t c h
Z e r o r e t u r n
s p e e d
V e l o c i t y
(
v
)
H i g h
r e t u r n s p e e d
L o w r e t u r n
s p e e d
R e t u r n
f i n i s h
T i m e
(
t )
D e c e l e r
a t e s
t o s t o
p
R e v e r s e l y
Time(t)
Velocity(v)
Zero return speed
High return speed
Decel
erates
to sto
p
Low return speed
Reversely
Return
finish
Deceleration switch
Fig.2-42 (the feeding slowdown release switch) Fig.2-43 (the feeding slowdown press down switch)
Ref.C mode,the feeding slowdown when 0:release switch 1:press down switch
C type machine zero return process
A: Select the Machine Zero mode, press manual positive or negative (zero return direction set
by bit parameter No.183) feed key, the corresponding axis will move to the zero at a high
speed(set by parameter No.113).
B: As the proximity switch touches the tongue for the first time, the deceleration signal is active.
If the pushing block deceleration begins (The Bit 1of the status parameter equals to 1), the
feed speed decelerates to zero, then it runs reversely by low return speed.
C: If the setting block begins to decelerate (The Bit 1 of the status parameter No.011 sets to 0), it
is still operated with same speed when its speed descends. When the deceleration signal
contactor is closed, the operation speed decelerates to zero till leaving the deceleration
switch, and then it reversely operates with low speed based upon the machine tool zero.
D: As the proximity switch touches the deceleration switch for the second time in reverse running,
deceleration signal contact is cut off, it still runs by low return speed; as it detaches the
deceleration switch, deceleration signal contact is closed again, so the movement stops. The
zero return indicator for the corresponding axis on the panel lights up for zero return
completion.
z
The machine zero return (zero-return method D) of deceleration signal or zero signal by
using the servo motor one-turn signal
There are four zero return methods for rotation axis, which are separately divided into: A, B, C
and D. Wherein, zero return method A, B and C are identical with the one of the linear axis. Only the
D is a special zero return method of the rotation axis.
When the controllable axis is rotation one, and the Bit 6 of status parameter No.188 sets to 1,
select the machine zero return method D.
The time-sequency figure of the machine zero operation in method D is as follows:
