EM422S Digital Stepper Drive User Manual
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7.3 Micro Step Configuration
(SW5-8)
Each EM422S has 16 micro step settings which can be configured through DIP switch SW5, SW6, SW7, and SW8.
See the following table for detail.
Micro step
Pulses/Rev. (for 1.8°motor)
SW5
SW6
SW7
SW8
1
200
ON
ON
ON
ON
2
400
OFF
ON
ON
ON
4
800
ON
OFF
ON
ON
8
1600 (default)
OFF
OFF
ON
ON
16
3200
ON
ON
OFF
ON
32
6400
OFF
ON
OFF
ON
64
12800
ON
OFF
OFF
ON
128
25600
OFF
OFF
OFF
ON
5
1000
ON
ON
ON
OFF
10
2000
OFF
ON
ON
OFF
20
4000
ON
OFF
ON
OFF
25
5000
OFF
OFF
ON
OFF
40
8000
ON
ON
OFF
OFF
50
10000
OFF
ON
OFF
OFF
100
20000
ON
OFF
OFF
OFF
125
25000
OFF
OFF
OFF
OFF
7.4 Filter Time Configuration (SW9-10)
EM422S has an advanced feature called control command smoothing to eliminate “noise” input pulse from the pulse
generator (controller, PLC, etc.), and therefore improve motion smoothness and high-speed start frequency in many
circumstances.
This is achieved through adding filtering time which is configured SW 9-10. See the following table for how to
configure. In multi-axis applications make sure to set the Filter Time value of each EM422S to the same.
Filter Time
SW9
SW10
0 ms (disabled)
ON
ON
6 ms
OFF
ON
12 ms
ON
OFF
25 ms (default)
OFF
OFF
!
Warning
The Filter Time value must be set to the same for each EM422S in multi-axis applications
7.5 No Auto Tuning Configuration
(SW11)
EM422S can configure itself with the best match to the driven stepper motor for optimal performance. This feature
may need to be disabled for some applications or when it is used to drive a specially designed stepper motor. To do that,
set the DIP switch SW11 to ON position and the drive will be set to its default settings.
