Anaheim Stepper MBB4502175 Users Guide

							August 2001
MBB45021-75
Enhanced Step Motor Driver
User’s Guide
#L010052
910 East Orangefair Lane, Anaheim, CA 92801
e-mail: [email protected](714) 992-6990  fax: (714) 992-0471
website: www.anaheimautomation.com
ANAHEIM AUTOMATION   
						

							User’s Guide # MBB45021-75
MBB45021-75 Enhanced 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 17-28 VAC or 24-40 VDC
• TTL-CMOS Compatible Inputs
• Receives Positive or Negative Going Clocks
• Full Step or Half Step Operation
• Motor Turn Off Provisions
• Enclosed Modular Package
General Description
The Anaheim Automation MBB45021-75 is a bilevel step motor driver packaged with an integral power
supply and is specifically designed to dynamically enhance driver performance while circumventing the
effects of input voltage variations. The stratagem of this design is to use regulation techniques to effect a
continuous productive change in response to motor operating conditions and input voltage variations.
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.
Half Step/Full Step
Users have a choice of 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 energiz-
ing 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 sys-
tems. JP3 is used to change between half step and full step operation. Please see the section on Jumper
Functions/ Locations for placement of this jumper.
Motor On/Off - Reset
The Motor On/Off feature allows the de-energizing of a motor without disturbing the positioning logic. After
re-energizing the motor, a routine can continue. This reduces motor heating and conserves power, espe-
cially in applications where motors are stopped for long periods. The reset pin is used to reset a fault
condition. This input must be held low for at least 10 msec to reset the driver. 
						

							August 2001
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. Important Note: When the wiring
from the driver to the step motor extends beyond 25 feet, consult the factory.
Current Adjust Setting (CUR. ADJ.)
The potentiometer R7 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.
t o P
g n i t t e Sd e t a R
r o t o M
t n e r r u Ck c i K
t n e r r u C
% 0A0 8 .A0 1 . 1
% 0 1A5 1 . 1A0 6 . 1
% 0 2A5 5 . 1A5 1 . 2
% 0 3A0 9 . 1A5 6 . 2
% 0 4A5 2 . 2A0 2 . 3
% 0 5A5 6 . 2A0 7 . 3
% 0 6A0 0 . 3A0 2 . 4
% 0 7A0 4 . 3A5 7 . 4
% 0 8A5 7 . 3A5 2 . 5
% 0 9A5 1 . 4A0 8 . 5
% 0 0 1A0 5 . 4A0 3 . 6
Clock Modes
The MBB45021-75 has two clock options: clock and direction, or dual clock operation. Jumper JP2 is used
to select the clock option. Basically JP2 selects TB1 pin 2 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 cause
the motor to step. The direction of the motor is determined by the logic level of the direction input. Jumper
JP2 must be in the “2-3” position for this mode. Physical direction also depends on the motor wiring.
With the dual clock option, clock pulses applied to the clock input cause the motor to step in the clockwise
direction. Clock pulses applied to the CCW input cause the motor to step in the counter-clockwise direc-
tion. Jumper JP2 must be in the “1-2” position for this mode.
Either positive or negative going pulses may be used by setting jumper JP1 in the appropriate position. To
determine 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 (position 1-2). If the clock output on the controller is a pnp or p-channel
(sourcing) type, then use the positive going jumper setting (position 2-3). 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 positive going jumper settings.  If the clock is high when not pulsing, then use the
negative going jumper setting. 
						

							User’s Guide # MBB45021-75
Low Voltage Adjust (VLV ADJ.)
The potentiometer R26 is used to set the motor low voltage (VLV) supply which furnishes the current
necessary for holding (standstill) torque and low-speed running torque. Higher values for the low voltage
will produce more holding and low-speed torque. A proper VLV will produce a standstill current that is 65
to 100% of the rated motor current (i.e. for a motor rated at 1 Amp, VLV should be set so that the standstill
current is 0.65 to 1 Amps.
r o t o Ml l i t s d n a t S
t n e r r u C
) e s a h P / s p m A (. J D A V L V
t o P
g n i t t e Sr o t o Ml l i t s d n a t S
t n e r r u C
) e s a h P / s p m A (. J D A V L V
t o P
g n i t t e S
8 W L - * _ 2 0 0 L 7 17.%08W L - * _ 6 0 3 L 3 21. 2%5 5
8 W L - * _ 2 0 1 L 7 17.%5 4*_ 2 0 1 D 3 27.%5 4
8 W L - * _ 2 0 2 L 7 17.%5 5*_ 4 0 1 D 3 24. 1%0 2
8 W L - * _ 3 0 2 L 7 150 . 1%0 2*_ 4 0 2 D 3 262 . 1%5 3
8 W L - * _ 2 0 0 L 3 27.%5 4*_ 6 0 3 D 3 230 . 2%0 3
8 W L - * _ 2 0 1 L 3 27.%0 8*_ 6 0 1 D 4 31. 2%0 2
8 W L - * _ 4 0 1 L 3 24. 1%0 28W L - * _ 4 0 1 N 4 34. 1%5 6
8 W L - * _ 6 0 1 L 3 21. 2%08W L - * _ 8 0 1 N 4 337 . 2%0 3
8 W L - * _ 4 0 2 L 3 24. 1%5 38W L - * _ 4 0 1 K 4 34. 1%5 6
8 W L - * _ 6 0 2 L 3 21. 2%0 38W L - * _ 8 0 1 K 4 337 . 2%0 3
8 W L - * _ 3 0 3 L 3 250 . 1%5 3x xx
Jumper Functions/ Locations
n o i t c n u F1P J2P J3P 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
n o i t a r e p O p e t S f l a HXX2- 1
n o i t a r e p O p e t S l l u FXX3- 2
t c u d o r P d r a d n a t S
) p i h S o t y d a e R (2 - 13- 22- 1
* Substitute S or D for Single or Dual Shaft Motor
SET PROPER KICK CURRENT AND LOW
VOLTAGE BEFORE OPERATING MOTOR.  
						

							August 2001
Wiring Diagram
Heating Considerations
The temperature of the heatsink should never be allowed to rise above 60 degrees Celsius. If necessary,
air should be blown across the heatsink to maintain suitable temperatures.
Terminal Descriptions
n i Pno i t p i r c s e D
1tu p n I k c o l C
2lo r t n o C l a n o i t c e r i D
3te s e R - f f O / n O r o t o M
4CD V 0
5r e w o P C D ) V 0 4 - 4 2 + (
) d e s u F ( t u p n In i Pno i t p i r c s e D
1) C A V 8 2 - 7 1 (
t u p n I r e w o P
2) C A V 8 2 - 7 1 (
) d e s u F ( t u p n I r e w o Pn i Pno i t p i r c s e D
11e s a h P
23e s a h P
33& 1 m o C
44& 2 m o C
52e s a h P
64e s a h P
TB1 TB2 TB3 Power Requirements
The MBB45021-75 can be powered by an AC or DC 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.  
						

							User’s Guide # MBB45021-75
Dimensions
Fault Protection
There are 3 types of fault detection. When a fault is detected, the driver turns off the motor current and the
dual LED indicates which type of fault occured. The upper LED is green during normal operation.
d e R D E L r e w o L.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 e r G D E L r e w o L.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
d e R D E L r e p p U.n o i t p m u s n o c r e w o p e v i s s e c x E
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 3) to a logic “0” for at least 10 msec.  
						

							August 2001
Transformer Drawings
Transformer Wiring Diagrams     
						

							User’s Guide # MBB45021-75
Specifications
Control Inputs:
TTL-CMOS Compatible
Logic “0”=0 to 0.8 VDC
Logic “1”=3.5 to 5.0 VDC
Terminals 1 and 2 on TB1 are pulled up or down (depending on jumpers) through 10k ohm resistors.
Terminal on TB1 is pulled up through a 10k ohm resistor.
Clock, CCW:
(Terminals 1 and 2 of TB1)
15 microseconds minimum pulse width, positive or negative going.
Direction Control:
Logic “1” (open)-clockwise
Logic “0”-counterclockwise
Motor On/Off:
Logic “1” (open)-motor energized
Logic “0”-motor de-energized
Output Current Rating:
5.0 Amperes per phase maximum operating current; 2.5 Amperes per phase maximum standstill current,
over the operating voltage and temperature range. Motor phase ratings of 0.8 Amperes minimum are
required to meet the minimum kick level.
Power Requirements:
17 VAC (min)-28 VAC (max) or
24 VDC (min)-40 VDC (max)
Operating Tempature:
Heatsink - 0° to 60°C
Fuse:
8 Amp Fast Blow, 5 x 20mm
y l p p u S C Dre m r o f s n a r T C A
A 4 V 0 4 A S P59 2 2 A A
A 7 . 2 V 4 2 A S P4 8 7 2 A A
A 8 V 0 4 A S P58 7 2 A A
Power Supply Ordering Information
The AA2784 is the recommended transformer. For additional info on other transformers please contact
the factory. 
						

							August 2001
Troubleshooting
If a fault occurs, reset the fault by applying a logic “0” to the reset input (TB1 pin 3) for at least 10 msec (or
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 lower LED red?
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 lower LED green?
This indicates that there is an open or intermittant 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 upper LED red?
This indicates that the motor/driver application is consuming excessive power. This detection turns off
power to the motor, protecting the driver’s circuitry. An application exceeding 160 watts is not intended for
the MBB45021-75. Another condition that may cause this type of fault, is when the input voltage is too low.
A higher rated DC supply or AC transformer may solve this problem (see power supply ordering informa-
tion).
Checking Output Transistors
1. Remove the cover plate.
2. Set the multimeter to “diode test”.
3. Place the red meter lead on (between) the sense resistors (labled as R15 and R36 in Jumper
    Functions/Locations).
4. Touch the black meter lead to each phase (TB3 pins 1,2,5 and 6).
5. Readings should be between 0.450 VDC and 0.550 VDC.
6. 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 
						

							User’s Guide # MBB45021-75
Torque Speed Curves