Cross cutter – Lenze EVS93xx CrossCutter User Manual
Page 90
Cross Cutter
Features of the "Cross Cutter" prepared solution
Prepared Solution Servo PLC / ECSxA 1.1 EN
2-76
Calculating and setting acceleration and deceleration times when using inching trimming
(g_bXAxisTrimmingPosDirection and g_bXAxisTrimmingNegDirection)
The acceleration and deceleration times relate to a change in the output value from 0 to 100%
(100% = 16384). The times to be set for the acceleration time Tir and the deceleration time Tif
can be calculated using the following formulae:
1
2
%
100
1
2
%
100
w
w
t
T
on
decelerati
w
w
t
T
on
accelerati
if
if
ir
ir
−
⋅
=
−
⋅
=
Following calculation, you will need to enter the values T
ir
and T
if
in the corresponding codes
(C3676/000 = acceleration time T
ir
; C3677/000 = deceleration time T
if
).
Figure29: Graph for calculating acceleration and deceleration times when using inching
trimming
Example: The inching speed is to be 50 rpm. This speed value needs to be reached within 1
sec. This results in the following values for T
ir
and T
if
when the formula below is applied:
sec
300
0
50
15000
sec
1
1
2
%
100
sec
300
0
50
15000
sec
1
1
2
%
100
=
−
⋅
=
−
⋅
=
=
−
⋅
=
−
⋅
=
w
w
t
T
on
decelerati
w
w
t
T
on
accelerati
if
if
ir
ir
Note!
100% corresponds to the value entered in code C0011/000. In the example calculation, a
value of 15,000 rpm has been assumed.
Calculating and setting acceleration and deceleration times when using position
trimming (C3674/000 = Selection of the absolute target trimming position)
The acceleration and deceleration times relate to 4000 rpm. The times to be set for the
acceleration time T
ir
and the deceleration time T
if
can be calculated using the following
formulae: