4 Programming of Motion Blocks 05.91
4.2.7 Exact positioning G09/G60, G00, continuous path operation G62/G64
The feed motion is reduced towards the end of the block to a rate defined in the machine data
using the function G62. The action of G62 and G64 is modal.
Approach to corner deceleration G62
a
a
a
a
a
a
F3
a
a
a
a
a
a
a
a
FG62
a
a
t
a
a
a
F
a
a
a
a
a
a
F2
a
a
a
a
a
a
F1
a
a
a
a
a
a
a
a
a
a
a
a
F
SET
a
a
a
a
a
a
a
a
a
a
a
a
F
ACT
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
Block limits
Note:
The reduction velocity for G62 (set in machine data) is not attained precisely. The error
tolerance band is described as follows:
FG62 = Reduction velocity (MD 3)
Fact = Attained ”actual” reduction velocity
F
DECEL
= Deceleration step (velocity reduction per IPO cycle)
FG62 Fact (FG62 + F
DECEL
)
where F
DECEL
is calculated from:
a = Acceleration (MD 276*) [m/s
2
]
tipo = IPO cycle [ms]
F
DECEL
mm
min
=
a
m
s
2
•
tipo [ms]
•
60
No reduction occurs at the first block limit if F1 FG62 + F
DECEL
Reduction only to F3 at the second block limit if F2 FG62 + F
DECEL
4–28 © Siemens AG 1991 All Rights Reserved 6ZB5 410-0HD02
SINUMERIK 880, (PG)
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