Siemens SINUMERIK 828D Turning, Руководство по эксплуатации функций

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B2: Acceleration
4.2 Functions
Basic Functions
222
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Figure 4-2 Schematic for abrupt acceleration
The effect of the constant travel time can be seen from the figure above:
• Time: t
1
End of acceleration phase with sudden acceleration 1 * a
max
• Interval: t
1
- t
2
Acceleration 0; constant velocity using the parameterized constant travel time
• Time: t
2
Start of braking phase with sudden acceleration 1 * a
max
The times t
0
, t
1
' and t
2
' indicate the characteristic that would have been produced had no constant travel time
been defined.
4.2.3.2 Parameterization
The constant travel time is parameterized for specific channels using machine data:
MD20500 $MC_CONST_VELO_MIN_TIME
(minimum time with constant velocity)
1: Characteristic with constant travel time
2: Characteristic without constant travel time
a
max
: Maximum acceleration value
v
max
: Maximum velocity value
t: Time
W W W W W W
DPD[
D
DPD[
YPD[
W
W
Y