Copyright 2018, SIGMAKOKI Co.,Ltd.
53
4-2-14 S command
（
（
（
（
Divide number switching command
）
）
）
）
(1) Function
S command is to switch the step angle of motor (number of partitions). Select a step angle among
settable 15 kinds of step angle with driver. Assign the number of divide after the 4
th
digit of command.
Stepping motors rotate 500 steps with 0.72 degrees (basic step angle) per revolution, which means
minimum resolution of motor will be 0.72 degrees and the minimum resolution of the stage with1mm lead
pitch will be 2
μ
m
（
=1mm
÷
500
）
. Minimum resolution can be altered by parting basic step angle.
Minimum resolution for close control should be set to half the scale resolution or less.
Partition numbers should be assigned on or after the 4
th
digit of command. Multiple axes can not be
assigned simultaneously. Please assign the partition numbers to each axis.
No.of
divides
1
2
4
5
8
10
20
25
40
50
80
100
125
200
250
Step angle
0.72
0.36
0.18
0.144
0.09
0.072
0.036
0.0288
0.018
0.0144
0.009
0.0072
0.0058
0.0036
0.0029
Pulse
rates per
rev.
500
1000
2000
2500
4000
5000
10000
12500
20000
25000
40000
50000
62500
10000
0
12500
0
Resolution
(
µ
m)
2
1
0.5
0.4
0.25
0.2
0.1
0.08
0.05
0.04
0.025
0.02
0.016
0.01
0.008
※
※
※
※
) At Closed Loop control method, similar other than Original position, and do not carry out S
command. When similar other than Original position and change motor step angle, because a
coordinate position changes, work definitely and not carried out.
※
※
※
※
)
HIT-SH cannot change the Motor Divide by this command.
(2) Example
S:12
Divide the step angle of axis 1 into 2.
S:280
Devide the step angle of axis 2 into 80.
S:4250
Devide the step angle of axis 4 into 250.