MMP SA-2550A
Page 7 of 24
Midwest Motion Products
DESIGN, MANUFACTURING & DISTRIBUTION - MOTION CONTROL EQUIPMENT
email:
(Note : Drive cover must be removed to access SW4)
SW4
Description
Setting
1
Advanced Tuning
(Velocity Loop Integrator Capacitance)
See SW4 table in Loop Tuning Switch Functions section for
switch settings and corresponding capacitance values.
2
3
4
5
Continuous Current Scaling. Configures the drive to set the
continuous current limit at a percentage of the drive peak
current limit.
See Continuous Current Scaling Table below for switch
settings and corresponding values.
6
7
8
Peak and Continuous Current Scaling. Adjusts both the peak
and continuous drive current limits.
See Peak and Continuous Current Scaling Table below for
switch settings and corresponding values.
9
10
Continuous Current Scaling Table
Default switch settings are shaded.
Switch
Continuous Current Scaling (% of Peak Current)
50
43.6
37.6
31.6
25.6
19.7
13.7
7.75
SW4-5
OFF
ON
OFF
ON
OFF
ON
OFF
ON
SW4-6
OFF
OFF
ON
ON
OFF
OFF
ON
ON
SW4-7
OFF
OFF
OFF
OFF
ON
ON
ON
ON
Peak and Continuous Current Scaling Table
Default switch settings are shaded.
Switch
Peak and Continuous Current Scaling* (A
PEAK
)
50
43.63
38.60
34.61
31.37
28.67
26.40
24.47
SW4-8
OFF
ON
OFF
ON
OFF
ON
OFF
ON
SW4-9
OFF
OFF
ON
ON
OFF
OFF
ON
ON
SW4-10
OFF
OFF
OFF
OFF
ON
ON
ON
ON
Potentiometer Functions
Potentiometer
Description
Turning CW
1
Loop gain adjustment for duty cycle / velocity modes. Turn this pot
fully CCW in current mode.
Increases gain
2
Current limit. It adjusts both continuous and peak current limit
while maintaining their ratio.
Increases limit
3
Reference gain. Adjusts the ratio between input signal and output
variables (voltage, current, or velocity).
Increases gain
4
Offset / Test. Used to adjust any imbalance in the input signal or in
the amplifier. Can also be used as an on-board signal source for
testing purposes.
Adjusts offset in negative direction
Note: Potentiometers are approximately linear and have 12 active turns with 1 inactive turn on each end. Test points are provided on the drive PCB near each
potentiometer to measure the potentiometer value.
MIDWEST M
O
TION
P
RODUCTS
