Anaheim Stepper MDD4502180 Users Guide

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MDD45021-80
Enhanced Step Motor Drive
User’s Guide
910 East Orangefair Lane, Anaheim, CA 92801
e-mail: [email protected](714) 992-6990  fax: (714) 992-0471
website: www.anaheimautomation.com
ANAHEIM AUTOMATION 

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Ordering Information
Note: The AA2784 is the recommended transformer. For additional info on other transformers please
contact the factory.
# t r a Pn o i t p i r c s e D
B 5 9 2 2 A Ast t a W 0 0 1 , r e m r o f s n a r T C A
B 4 8 7 2 A Ast t a W 0 0 2 , r e m r o f s n a r T C A
B 5 8 7 2 A Ast t a W 0 0 3 , r e m r o f s n a r T C A
General Description
The MDD45021-80 driver is a unipolar step motor driver designed for 4 phase step motors. The MDD45021-
80 is specifically...

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Bilevel Drive
The basic function of a step motor driver is to control the motor winding currents. Motor performance is
determined by how fast the driver can increase and decrease the winding currents. A rapid rise in winding
current is achieved by applying a high voltage directly to a motor winding. This rapid rise of current is also
referred to as the “kick” or operating current. When a desired current level is reached, the high voltage is
turned off and a low voltage is applied...

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Terminal Descriptions
# n i Pn o i t p i r c s e D
1tu p n I k c o l C
2lo r t n o C n o i t c e r i D
3pe t s l l u F r o f l a H
4pe t s l l u F / p e t s f l a H
5tu p t u O C D V 5 +
# n i Pn o i t p i r c s e D
11e s a h P
23e s a h P
33& 1 e s a h P M O C
44& 2 e s a h P M O C
52e s a h P
64e s a h P
Clock, CCW, and Direction
Pulses applied to the clock input cause the motor to move in the clockwise direction if the direction control
input is a logic “1” (no connection), or...

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Transformer Drawings (AA2784)
Note: Blue wires go to TB2, pins 1 & 2 on the driver.
Transformer Wiring Diagrams (Primary Input) 

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Low Voltage Adjust (VLV ADJ.)
The jumper JP3 is used to set the motor low voltage (VLV) supply which furnishes the current necessary
for holding (standstill) torque and low speed running torque. The potentiometer R16 and JP3 setting will
produce a standstill current that is 70% of the rated current. Refer to the Anaheim Automation website or
catalog for motor current ratings. The charts below are a guide when selecting a motor and the jumper JP3
setting. (Refer to Jumper Functions...

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r o t o M d e t a R
t n e r r u Ck c i K
t n e r r u Ct o P
g n i t t e S
A 0 0 . 1A0 4 . 1%0
A 5 3 . 1A9 8 . 1%0 1
A 0 7 . 1A8 3 . 2%0 2
A 5 0 . 2A7 8 . 2%0 3
A 0 4 . 2A6 3 . 3%0 4
A 5 7 . 2A5 8 . 3%0 5
A 0 1 . 3A4 3 . 4%0 6
A 5 4 . 3A3 8 . 4%0 7
A 0 8 . 3A2 3 . 5%0 8
A 5 1 . 4A1 8 . 5%0 9
A 0 5 . 4A0 3 . 6%0 0 1
Current Adjust Setting (CUR. ADJ.)
The potentiometer R16 is used to set the motor current. The pot should be set according to the motor’s
rated current. This will...

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Dimensions 

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Specifications
Control Inputs: (TB1, Pins 1-4)
TTL-CMOS Compatible
Logic “0” = 0-0.8VDC
Logic “1” = 3.5-5.0VDC
Pins 1 and 2 are pulled up or down (depending on the jumpers) through 10k ohm resistors. Pin 3 and 4 are
pulled up through a 10k ohm resistor.
Clock, CCW: (TB1, Pins 1 and 2)
15 microseconds minimum pulse width, positive or negative going.
Direction Control: (TB1, Pin 2)
Logic “1” (open) - Clockwise
Logic “0” - Counterclockwise
Half Step/ Full Step: (TB1, Pin 3)
Logic “1”...

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Troubleshooting
If a fault occurs, reset the fault by cycling power OFF for at least 20 seconds. After resetting, try to run the
motor again. If the driver faults again then check the conditions listed below.
Is the Short LED on?
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. If the driver continues to sense “shorts” after the motor and wiring are
determined to be accurate, then the...