BLD72, BLD72-1 Bilevel Step Motor Driver User’s Guide A N A H E I M A U T O M A T I O N 910 East Orangefair Lane, Anaheim, CA 92801 e-mail: info@anaheimautomation.com #L010011 1 (714) 992-6990 fax: (714) 992-0471 website: www.anaheimautomation.
Features • Bilevel Driver Operation • 10 Amps per Phase Operating Current (Kick Current) • 7 Amps per Phase Standstill Current • 70 Volt Operation • Short Circuit Protection • Open Circuit Protection • Unipolar Operation • Motor ON/OFF Input • Half-Step and Full-Step Operations • Fault LED • Detachable Terminal Block • CE Certified • Compact and Rugged • Available in Driver Packs What Is a Step Motor Driver? A step motor driver is a device that takes input signals (usually Clock and Direction) and translat
Clock Modes The BLD72 has two clock options: Clock and Direction, or Dual Clock operation. Jumper JP2 is used to select the clock option. Basically JP2 selects Terminal 5 as either the Direction input or the CCW input. With the Clock and Direction option (most common option), clock pulses applied to the Clock input (Terminal 6) cause the motor to step. The direction of the motor is determined by the logic level of the Direction input (Terminal 5).
Jumper Functions/Locations Function JP 1 JP 2 JP 3 Negative Going Clocks 1-2 Positive Going Clocks X X 2-3 X X Terminal 5 = CCW X 1-2 X Terminal 5 = Direction X 2-3 X Ground Fault Detection Enabled X X 2-3 Ground Fault Detection Disabled X X 1-2 Standard Product 1-2 2-3 2-3 Table1: Jumper Settings Figure 4: Layout Drawing Adjusting Kick Current By following the instructions on the cover, use a small screwdriver to adjust the potentiometer.
Motor Connections Figure 5 is a hookup diagram for typical BLD72 driver applications. Wiring connected to inputs must be separated from motor connections and all other possible sources of interference. IMPORTANT NOTE: When the wiring from the driver to the step motor extends beyond 25 feet, consult the factory. Wiring Diagram The wiring diagram in Figure 5 shows the BLD72 with the AA2791 Transformer. For wiring with the AA2793 Transformer, refer to Figure 9.
Transformer Drawings 2.350 .800 MAX 2.500 1.500 1.450 MAX 3.000 3.750 MAX 3.570 4.500 3.100 Figure 6: Transformer Dimensions Note: The AA2793 transformer is the same physical size as the AA2791, but it has two sets of secondary windings (to power two drivers) and a dual primary winding for 115/230V operation.
Figure 9: Wiring for different line voltages for the AA2793 transformer.
Dimensions Drawings Figure 10: BLD72 Dimensions Note: The BLD72 and BLD72-1 are the same except for the base plate. The BLD72 is a replacement driver for use in Driver Packs. The BLD72-1 is a modular driver which has a larger base plate.
13 Pin Terminal Description Ter minal # Description 1 Motor, Phase 1 2 Motor, Phase 3 3 Motor, Common 1, 3 4 Fault Reset 5 Direction (CCW) 6 Clock (CW) 7 0V D C 8 Half-Step/Full Step 9 On/Off 10 N/C 11 Motor, Common 2, 4 12 Motor, Phase 2 13 Motor, Phase 4 Motor Compatibility Standard Motors High Torque Motors P ar t # Unipolar Rating P ar t # Unipolar Rating 23D 104_ 2.0A 23L206_ 3.0A 23D 108_ 4.0A 23L210_ 5.0A 23D 209_ 4.5A 23L306_ 3.0A 23D 309_ 4.
Specifications Control Inputs (All) : (Terminals 5, 6, 8, 9) TTL-compatible Logic “0” - 0 to 0.8 V Logic “1” - 3.5 to 5.0 V Fault Reset: (Terminal 4) Pulled up to +5VDC through a 10k Ohm resistor Logic “1” (open) - Driver enabled and Fault detection enabled Logic “0” - Resets a Fault condition (driver is disabled when this input is low). This input must be held low for at least 100ms. Clock Inputs : (Terminals 5 and 6) Pulse required; 15 microseconds minimum.
Troubleshooting If a Fault occurs, reset the Fault by applying a logic “0” to the Reset Fault Input (terminal 4) for at least 100ms (or by cycling power OFF for at least 15 seconds). After resetting, try to run the motor again. If the driver faults again then check the conditions listed below. Is the LED blinking slowly? (Once a second) This indicates that the motor has a phase shorted or there is a short in the motor cable or wiring. Check the motor and the wiring for shorts.
Torque Speed Curves ANAHEIM AUTOMATION 12
