28
In position control mode, the motor drives the screw to rotate, and motor rotates one
circle(requires 10,000 pulse commands), and the workpiece moves one pitch (3mm). Then the
motor moves: 3mm/10000=3um by receive one pulse.
For easy control,to realize 1um per puls,we use electronic gear ratio.
Electronic gear ratio
The move distance of workpiece by
receiving each pulse
Not use electronic
gear ratio
1
1
m
puls
m
10000
3000
10000
1000
3
(
reciprocal)
Use electronic gear
ratio
3
10
3000
10000
m
1
Note: The electronic gear ratio has effect to speed: In the position (external pulse) mode, the
rotation speed of the motor depends on the command pulse frequency, and the real pulse
frequency received by the motor = external pulse frequency x electronic gear ratio.
6.3.3 Instruction filtering
◎
P2-01
Position command
filter selection
0X0201
Initial value
:
2
Control mode
:
6,7
Unit
:
~
Setting range
:
0,1
(
Can be modified when the servo in OFF, and take effect by power off and
restart)
Parameter function: 0: first-order inertial filtering
1: smoothing filtering
◎
P2-04
Position command
acceleration/deceleration time
parameter
(
ms
)
0X0204
Initial value
:
0
workpiece
Screw guide
Pitch
:
3mm
Motor