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Fh speed
*DEC01~*DEC04
Grid point
Calculation of dog length
1.
Decelerate limit dog length "L1" should be long enough so that the dog can be
turned off after the zero return speed becomes Fm.
2.
Length "L2" should be 1/4 to 3/4 rev. of the motor grid interval. (1/2 rev. is
optimal.)
1
L1 = :
3.
60000 ·
where,
A
: Servo droop amount (mm)
t
: Time constant of linear acceleration/deceleration for rapid traverse (ms)
1
L1 : Dog length (mm)
Fm speed
t1
L1
LL1
Fig. 6.2.3
1
2
2 · t
· (Fh – Fm
/ Fh) + A
1
– 105 –
Grid point
Zero point offset value
Fl speed
Position where signal status
changes from LOW to HIGH.
L2
"LL1=LL2" is optimal.
STE 73843
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