Fuji Electric ALPHA5 Smart, User Manual

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CHAPTER 3 OPERATION
3-8
Operation
3
3.4.2 Position Control (Pulse)
The shaft rotation position is controlled under position control according to the pulse input of the servo
amplifier.
The pulse operation procedure is shown below.
(1) Pulse setting
According to the pulse format of the host pulse generator, enter the following parameters.
No.
Name
Setting range
Default
value
Change
PA1_03
Command pulse input
method and form selection
0: Differential input, command pulse/direction
1: Differential input, forward/reverse pulse
2: Differential input, A/B phase pulse
10: Open collector input, command
pulse/direction
11: Open collector input, forward/reverse pulse
12: Open collector input, A/B phase pulse
1 Power
PA1_05
Number of command input
pulses per revolution
0: Electronic gear (PA1_06/07) is enabled.
64 to 1048576 [pulses]: Number of command
input pulses per revolution is enabled.
0 Power
PA1_06
Numerator 0 of electronic
gear ratio
1 to 4194304
16 Always
PA1_07
Denominator of electronic
gear ratio
1 to 4194304
1 Always

To assign 4000 pulses per revolution of the servomotor
PA1_05 = 4000

To connect a 5 mm ball screw directly and change the per-pulse mechanical system traveling
amount to 0.001 mm (18 bits)
Because (5/262144)×(PA1_06/PA1_07) = 1/1000
PA1_05=0, PA1_06=32768, PA1_07 = 625
(1) Pulse setting
(2) Position control setting
(3) Position control check
(4) Pulse amount check