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MCX514 -
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2.2.3 Non-Symmetrical Trapezoidal Acceleration
If an object is to be moved using stacking equipment, there will be a need to change acceleration and deceleration of vertical
transfer since gravity acceleration is applied to the object.
This IC can perform automatic deceleration in non-symmetrical linear acceleration / deceleration fixed pulse driving where
acceleration and deceleration are different. It is not necessary to set a manual deceleration point by calculation in advance. Fig.
2.2-6 shows the case where the deceleration is greater than the acceleration and Fig. 2.2-7 shows the case where the acceleration is
greater than the deceleration. In such non-symmetrical linear acceleration, the automatic deceleration start point is calculated by
the IC based on the number of output pulses in fixed pulse driving and each rate parameter.
DC = 145kpps/sec
Deceleration Rate
DV = 30k
SV = 1k
0.8
1.2
1.4
Acceleration Rate
AC = 36.25kpps/sec
Speed
(pps)
time (sec)
Initial Speed
Drive Speed
Fig. 2.2-6 Non-Symmetrical Linear Acceleration Driving (acceleration
<
deceleration)
DC = 36.25kpps/sec
1.4
0.2
0.6
AC = 145kpps/sec
DV = 30k
SV = 1k
Speed
(pps)
time (sec)
Initial Speed
Drive Speed
Deceleration Rate
Acceleration Rate
Fig. 2.2-7 Non-Symmetrical Linear Acceleration Driving (acceleration
>
deceleration)
To perform non-symmetry linear acceleration / deceleration driving using automatic deceleration, bits D2 to 0 of WR3 register and
the following parameters must be set.
Table 2.2-4
Mode Setting
:
Non-symmetry Linear Acceleration / Deceleration
Mode Setting Bit
Symbol
Setting
Comment
WR3/D0
MANLD
0
Automatic deceleration
WR3/D1
DSNDE
1
When in deceleration, deceleration setting value is used.
WR3/D2
SACC
0
Linear acceleration / deceleration
Table 2.2-5
Setting Parameters
:
Non-symmetry Linear Acceleration / Deceleration
Parameter
Symbol
Comment
Acceleration
AC
Deceleration
DC
Initial speed
SV
Drive speed
DV
Drive pulse number / Finish point
TP
Not required for continuous pulse driving.