Specifications

Table Of Contents
CHOOSING YOUR SETTINGS
ADVANCED MICRO CONTROLS INC.
3
24
DIP Switch Settings (continued)
Motor Current (SB3-5 & SB4-1,2,3,4,5)
Your motor current setting is based on the amount of torque you need. Torque curves for our motors are avail-
able in Appendix A: CHOOSING YOUR MOTOR, starting on page 45. Table 3.1 gives the maximum cur-
rent ratings for all of our stepper motors. In the cases of the SM34-650D and SM42-1250D, the maximum
current of 6.3 amps is the limit of the SD17063, not the motor. If you do not need the maximum torque avail-
able from the motor, note that you do not have to set the current to this value. In fact, setting it to a lower
value will decrease motor heating which will prolong its life.
Table 3.1 Maximum AMCI Motor Current Settings
1) Never increase the current setting to a value greater than that specified for the
motor. Excessive current may cause motor overheating and failure.
2) The motor current setting is not latched. Changes to this setting are applied
immediately. Be aware that changing this setting while power is applied to the
motor may cause unexpected operation, including loss of holding torque. This
could result is possible damage to equipment and/or injury to personnel.
Therefore, AMCI can only recommend changing these settings while power is
removed from the drive.
If you decide to change these switches while power is applied to the drive, DO NOT
make changes while the motor is running.
Figures 3.6 through 3.8 show the switch settings for the motor current.
Figure 3.6 Motor Current Settings (0.0A – 1.2A)
Specification SM23-90 SM23-130 SM23-240 SM34-250 SM34-425 SM34-650 SM42-1250
Series Current 1.4A 1.4A 2.0A 2.2A 3.2A 3.8A 6.0A
Parallel Current 2.8A 2.8A 4.0A 4.3A 6.3A 6.3A 6.3A
1
O
N
2345
SB1
1
O
N
2345
SB2
1
O
N
2345
SB3
1
O
N
2345
SB4
MOTOR CURRENT (Pg 1 of 3)
Switch Block 3: Switch 5 & Switch Block 4: Switches 1 – 5
0.0 Amps 0.5 Amps
0.1 Amps 0.6 Amps
0.9 Amps
1.0 Amps
0.2 Amps 0.7 Amps
0.3 Amps 0.8 Amps
1.1 Amps
1.2 Amps
0.4 Amps
= Not Used When Setting Motor Current