Applied Motion Products STR3 Step Motor Drive Guide
Wiring the Drive
Step 1 – Wiring the DC supply
Do not apply power until all connections and settings to the drive have been made
a. Wire the drive to the DC power source.
Note, the STR3 accepts DC voltages from 12-48V.
b. Ensure a proper earth ground connection by using the screw on the left side of the chassis.
*See the STR3 Hardware Manual for more information about power supply and fuse selection.
Step 2 – Wiring the motor
Connect the drive to the motor. Four lead motors can be connected in only one way, as shown in Figure 1. Eight lead motors can be connected in Series or Parallel, as shown in Figures 2 and 3. If using a non-Applied Motion Products motor, please refer to your motor specs for wiring information.
Step 3 – Setting up the Drive
NOTE: DIP switch setting changes will only take effect at power up. If the DIP switches are changed while power is applied, the new settings will only take effect after a power cycle.
Selecting the motor current
The output current of the STR3 step motor drive is set by SW1, SW2 and SW3
Step resolution
Switches SW5, SW6, SW7, SW8 set the step resolution. There are 16 settings.
Selecting Idle current
Switch SW4 sets the idle current to either 50% or 90% of the selected running current. ON for 50% and OFF for 90%.
Control Mode
Switch SW11 sets control mode. Switch OFF sets the Step & Dir mode. Switch ON sets the CW/CCW mode
Step Noise Filter
Switch SW12 sets the Step noise filter. The STEP and DIR inputs have built-in digital filters and this setting will reduce external noise. If the drive is set for a low micro step resolution, select the 150 KHz (ON) setting. If the drive is set for a high micro step resolution, select the 500KHz (OFF) setting.
Step Smoothing Filter
SW10 sets the step smoothing filter. Step smoothing can soften the effect of immediate changes in velocity and direction, making the motion of the motor less jerky. An added advantage is that it can reduce the wear on mechanical components. ON enables it, OFF disables it. This function can cause a small delay in following the control signal.
Self Test
SW9 sets Self Test function. If switch SW9 is moved to the ON position the drive will automatically rotate the motor back and forth, two turns in each direction. This feature can be used to confirm that the motor is correctly wired, selected and otherwise operational.
If you have any questions or comments, please call
Applied Motion Products Customer Support: (800) 525-1609, or visit us online: applied-motion.com.
18645 Madrone Pkwy Morgan Hill, CA 95037
Tel: 800-525-1609 applied-motion.com