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 designed to dynamically enhance driver performance while circumventing the effects of
input voltage variations. The MDD45021-80 allows the option of using full-step or half-step operation, giving
the user the ability to step in either 1.8° or 0.9° increments. The driver can be powered by an AC voltage.
For AC operation, the driver may be purchased with a recommended step down transformer. A single
transformer may be used to power up several drivers based on power consumption. A major advantage
that  the MDD45021-80 has over chopper drivers, is that the MDD45021-80 is designed to use bilevel
technology. This means that it has replaced the need for high frequency switching techniques, conse-
quently it does not create the EMI, RFI, and motor heating problems that are associated with chopper
drivers. This technique makes the MDD45021-80 suitable for applications where low noise requirements
are a must. It is especially useful for medical equipment, test instruments, positioning systems, and any
other application where noise may be a problem.
MDB45021-80 Driver Features
• 1.0-4.5 Amperes/Phase Operating Current
• Enhanced Torque/Speed Output
• Improved Start-Stop Speeds
• Short Circuit Protection
• Open Motor Wire Detection
• No RFI or EMI Problems
• Requires 7-28 VAC
• TTL-CMOS Compatible Inputs
• Receives Positive or Negative Going Clocks
• Full Step or Half Step Operation
• Motor Turn Off Provisions
• Enclosed Modular Package 
						

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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 to maintain a suitable holding current level. When a motor winding
is turned off, a rapid decrease in winding current is achieved by routing the energy in the collapsing field
back to the power supply through a high voltage path. The high voltage supply furnishes the energy
necessary to maintain motor output torque at high step rates thus providing high mechanical power out-
put. The low voltage supply provides much of the current needed at low step rates and all of the holding
current. Bilevel drivers do not use high frequency switching techniques as chopper drivers do. Conse-
quently, they do not create the EMI, RFI, and motor heating problems that are associated with chopper
drivers.
Motor Connection
Refer to the hookup diagram for typical driver applications. Wiring connected to inputs must be separated
from motor connections and all other possible sources of interference.
Note: When connecting the driver to the step motor, consult the factory if more than 25 feet of cable will be
used to extend between the motor and driver.
Jumper Functions / Location
n o i t c n u F1 P J2 P J3 P J
t u p n I k c o l C g n i o G e v i t a g e N2- 1XX
t u p n I k c o l C g n i o G e v i t i s o P3- 2XX
W C C = 2 n i P 1 B TX2- 1X
n o i t c e r i D = 2 n i P 1 B TX3- 2X
o t y d a e R ( t c u d o r P d r a d n a t S
) p i h S2 - 13- 24- 3 
						

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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 in the counterclockwise direction if the direction control input is logic
“0”. Pulses applied to the CCW input cause the motor to move in the counter clockwise direction. Either
positive or negative going pulses may be used by setting jumpers in the appropriate position. To deter-
mine which setting to use, first consider the type of clock pulse output on the pulse generator or indexer
(controller). If the clock output on the controller is open-collector type (sinking), then use the negative
going jumper setting. If the clock output on the controller is a pnp or p-channel (sourcing) type, then use
the positive going jumper setting. If the clock output on the controller is a TTL/CMOS type (totem pole),
then either setting will work; but the jumper setting should be chosen based on the level of the clock output
when the controller is not pulsing. If the clock is low when not pulsing, then use the positive going jumper
setting. If the clock is high when not pulsing, then use the negative going jumper setting.
(Refer to Jumper Functions / Location for details on jumpers)
Half Step/Full Step
The MDD45021-80 has full-step or half-step operation. Full-step operation occurs by energizing two phases
at a time, rotating a typical motor 1.8 degrees per step. Half-step operation occurs by alternately energizing
one, and then two phases at a time, rotating the motor 0.9 degrees per step. Full-step operation is only for
applications that specifically require that mode, such as when retrofitting existing full-step systems.
Motor On/Off
The motor On/Off feature allows the de-energizing of a motor without disturbing the positioning logic. After
reenergizing the motor, a routine can continue. This reduces motor heating and conserves power, especially
in applications where motors are stopped for long periods.
Power Requirements
The MDD45021-80 can be powered by an AC voltage (see specifications). For AC operation, the driver
may be purchased with a recommended step down transformer. A single transformer may be used to
power up several drivers based on power consumption.
# n i Pn o i t p i r c s e D
1tu p n I r e w o P C A V 8 2 - 7 1
2tu p n I r e w o P C A V 8 2 - 7 1
TB1 TB2 TB3 
						

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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 / Location for details on JP3)
3 - 2 s n i P
2 0 0 L 7 1
8 0 1 D 3 2
9 0 2 D 3 2
9 0 3 D 3 2
6 0 1 L 3 2
6 0 1 L 3 2
8 0 1 L 3 2
9 0 1 D 4 3
9 0 2 D 4 3
9 0 1 R 4 32 - 1 s n i P
3 0 2 L 7 1
4 0 1 D 3 2
4 0 1 L 3 2
6 0 2 L 3 2
6 0 1 D 4 3
8 0 1 K 4 3
8 0 1 N 4 3
6 0 1 R 4 34 - 3 s n i P
2 0 1 L 7 160 3 L 3 2
2 0 2 L 7 170 2 D 4 3
2 0 1 D 3 270 3 D 4 3
4 0 2 D 3 240 1 K 4 3
6 0 3 D 3 270 2 K 4 3
2 0 0 L 3 270 3 K 4 3
2 0 1 L 3 240 1 N 4 3
4 0 2 L 3 270 2 N 4 3
3 0 3 L 3 270 3 N 4 3
Note: For motors not listed contact the factory for correct jumper settings.
Wiring Diagram
3 P Jn o i t c e l e S t s u j d A e g a t l o V w o L f o n o i t p i r c s e D
3 - 2. 3 P J n o 3 - 2 s n i P t c e l e s d l u o h s V 6 . 2 w o l e b s e u l a v e s a h p r e p e g a t l o v r o t o M
2 - 1. 3 P J n o 2 - 1 s n i P t c e l e s d l u o h s V 6 . 3 d n a V 6 . 2 n e e w t e b s e u l a v e s a h p r e p e g a t l o v r o t o M
4 - 3) t l u a f e D ( . 3 P J n o 4 - 3 s n i P t c e l e s d l u o h s V 6 . 3 e v o b a s e u l a v e s a h p r e p e g a t l o v r o t o M 
						

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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 produce a kick current of 1.4 times the rated motor current. (Refer to Wiring
Diagram for location of current adjust potentiometer R16)
D E Ln o i t p i r c s e D
t r o h S.e l b a c r o r o t o m e h t n i e r i w d e t r o h S
n e p O.e l b a c r o r o t o m e h t n i e r i w n e p O
e g a t l o V r e v O / p m e T r e v On a r o k n i s t a e h l a n r e t n i n o e r u t a r e p m e t e v i s s e c x E
. e g a t l o v s u b r o t o m e h t n o e g a t l o v r e v o
Note: If the driver goes into a fault condition, the fault may be reset by turning the power off for at least 20
seconds or by pulling the reset input (TB1 pin 4) to a logic “0” for ast least 10msec. Refer to the Trouble-
shooting section for further details.
Heating Considerations
The temperature of the heat sink should never be allowed to rise above 60 degrees Celsius. If necessary,
air should be blown across the driver to maintain suitable temperatures.
Fault Protection
There are 3 types of fault detection. When a fault is detected, the driver turns off the motor current and the
corresponding LED indicates which type of fault has occurred. The Short LED, Open LED, and Temp/OV
LED is off during normal operation. 
						

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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” (open) - Half-Step
Logic “0” - Full-step
Motor On/Off: (TB1, Pin 4)
Logic “1” (open) - Motor energized
Logic “0” - Motor de-energized
Output Current Rating: (TB3)
4.5 amperes per phase maximum operating current; 3.0 amperes per phase maximum standstill current.
Motor phase ratings of 1 ampere minimum are required to meet the minimum kick level.
Power Requirements: (TB2, Pins 7 and 8 or 8 and 9)
7VAC (min) - 28VAC (max)
Operating Temperature:
Heat Sink: 0°-60° C 
						

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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 output transistor should be checked (see below).
Is the Open LED on?
This indicates that there is an open or intermittent connection in one of the motor wires. Check the motor
and the wiring for opens. Another condition that may cause this type of fault, is when a large motor is
ramped down too quickly so that it loses it’s positioning.
Is the Temp/OV LED on?
This indicates that there is an excessive amount of heat on the internal heat sink or an over voltage on the
motor bus voltage. Check for a high input voltage into the driver.
Checking Output Transistors
1. Set the multimeter to “diode test”.
2. Place the red meter lead on ground (TB1 Pin 5).
3. Touch the black meter lead to each phase (TB3, Pins 1,2,5 and 6).
4. Readings should be between 0.450 VDC and 0.550 VDC.
5. If any readings are significantly less than 0.450 VDC, then the unit has been damaged.
If a factory repair is required, please contact Anaheim Automation for an RMA# at:
(800) 345-9401 or (714) 922-6990