20 Gear Drive, Plymouth Ind. Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860) 584-1973 http://www.amci.com
11
VERIFYING SYSTEM SETUP
Setting the Current Loop Gain
Setting the Current Loop Gain correctly allows you to maximize your motor’s performance. The SD17040C
takes into account the line voltage, output current and motor impedances when determining the optimum gain
for your system.
Assuming a stable line voltage of 115 Vac, the following gains can be used for AMCI motors. These gain set-
tings are factory suggestions and are average settings for our motors. Your system may benefit from increas-
ing or decreasing these settings. In general, increase the setting by one or two counts to improve high speed
performance or decrease the settings for quieter low speed operation.
If you are using a non-AMCI motor, use the
AutoID
setting to determine the correct gain for your system. Turn
off all of the switches in switch bank 2 and then verify that the motor current is set correctly and the motor is
attached to the driver. Cycle power to the driver. The
STEP/FAULT
LED will begin to blink almost immedi-
ately. Count the number of blinks. This number is what you should initially set the Current Loop Gain to.
Use the Switch Setting page of this manual to determine the correct switch settings. When you are done,
cycle power to the SD17040C and verify motor operation using the System Checkout procedure on the follow-
ing page. If need be, adjust the Current Loop Gain settings up or down depending on your application.
In most cases, the Current Loop Gain can be set to its
AutoMode
setting and the SD17040C will automatically
determine the proper gain on every power up or reset. This procedure is done in under two seconds.
GAIN SETTINGS
MOTOR CURRENT
"
"
"
"
1 A
1.5 A
2 A
3 A
4 A
MO
T
O
R P
A
R
T
#
SM23-130 (Series)
4
6
7
SM23-130 (Parallel)
2
3
4
SM23-240 (Series)
6
8
10
SM23-240 (Parallel)
4
5
6
SM34-450
6
9
11
SM34-850
11
14
17
SM34-1100
12
17
21
Summary of Contents for SD17040C
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