NOVA electronics Inc.
MCX514 -
24
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24
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[Note]
•
In non-symmetry linear acceleration / deceleration driving, when acceleration > deceleration (Fig. 2.2-7), the following
condition is applied to the ratio of acceleration and deceleration.
6
10
8
DV
AC
DC
×
×
>
For instance, if the driving speed DV = 100kpps, deceleration DC must be greater than 1/80 of acceleration AC. The
value must not be less than 1/80 of acceleration.
•
In non-symmetry linear acceleration / deceleration driving, if acceleration > deceleration (Fig. 2.2-7), the greater the
ratio of acceleration AC to deceleration DC becomes, the greater the number of creep pulses becomes (about maximum
of 10 pulses when AC/DC=10 times). When creep pulses cause a problem, solve the problem by increasing the initial
speed or setting a minus value to the acceleration counter offset.
■
Example of Parameter Setting
As shown in Fig. 2.2-6, parameter setting of relative position driving in non-symmetrical linear acceleration / deceleration
(acceleration < deceleration) is shown below.
Mode setting
WR3←0002h
Mode setting of WR3 register
Acceleration
AC = 36250
(30000-1000)/0.8 = 36250pps/sec
Deceleration
DC = 145000
(30000-1000)/0.2 = 145000pps/sec
Initial speed
SV = 1000
Drive speed
DV = 30000
Drive pulse number
TP = 27500
Relative position driving
[Note]
•
Though the triangle form prevention function works in non-symmetrical linear acceleration / deceleration driving, if
changing a drive speed during the driving, set the triangle form prevention function to disable (WR3
／
D13 : 1).
DC
：
Deceleration (pps/sec)
AC
：
Acceleration (pps/sec) Where CLK = 16MHz
DV
：
Drive speed (pps)
