Anaheim Stepper MLA10641 Users Guide

							MLA10641
High Performance Microstepping Driver 
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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							Introduction
The MLA10641 high-performance microstepping driver has an output current capability from 2.0 Amps 
minimum to 10.0 Amps maximum (Peak Rating).  The MLA10641 driver operates with an AC voltage 
of 90-132 Volts.  The inputs are optically isolated with a minimum sourcing of 7.0 mA per input (+5VDC 
minimum to +24VDC maximum).  The clock input is set to receive either positive or negative edge clock\
s 
with a maximum frequency of 400KHz.  The MLA10641 driver offers direction control and motor current 
ON/OFF capabilities.  The Reduce Current Enabled function automatically reduces motor current to 50% 
of set value after the last step is made.  The driver has built-in features to indicate power on (Green LED), 
Clocks being received (Yellow LED) and fault conditions (Red LED).
With the MLA10641, various step resolutions can be implemented by the onboard DIP switch.  These divi-
sions range from 200 steps per revolution to 12,800 steps per revolution.  The bipolar drive configuration 
handles 4, 6 and 8 lead motors.  Protection devices have been added to this driv\
er for Phase to Phase 
Short-Circuit, Motor Mis-Wire, Over Temperature and Over-Voltage conditions.
Pin Descriptions
The Inputs on the MLA10641 are optically isolated with the anode (+) and cathode (-) both brought out to 
the user.  With no current going through the opto-diode, the input is considered high.  To enable the input 
a minimum of 7.0 mA needs to be sourced or sinked through the opto-diode.  This is done simply by plac-
ing a voltage range of +5 to +24VDC across the two inputs of the opto-di\
ode.  If sinking current, then all 
three anodes (+) should be tied together to the +voltage as shown in F\
igure 2.  If sourcing current into the 
inputs, all three cathodes (-) should be tied together and grounded as shown in Figure 3.  The MLA10641 
also has an optically isolated Fault Output Signal.  This output has an open collector maximum voltage of 
30V and can sink up to 50mA.
MLA10641 High Performance Microstepping Driver Features
• Size 5.50”L x 2.96”W x 5.54”H
• High Torque Output
• Output Current 10.0 Amps Peak
• 200 to 12,800 steps/rev (1, 2, 5, 8, 10, 16, 32 and 64 selectable step operations)
• Short Circuit Protection
• Over-Temperature and Over-Voltage Shutdown
• No Minimum Inductance
• Optical Isolation
• Motor ON/OFF Input 
Optically Isolated Inputs and Output
The following inputs and output to the MLA10641 are Optically Isolated.
ItemPin #
Clock 1 & 2
Direction 3 & 4
On/Off 5 & 6
Fault Out 7 & 8
Table 1: Optically Isolated Pinout
To enable an input, apply a DC voltage source of +5VDC to +24VDC across t\
he inputs.  The Anodes (+) 
are pins 1, 3 and 5 and the Cathodes (-) are pins 2, 4 and 6.
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TB1: 8 Pin Input Terminal Description
Power Supply Requirements
The MLA10641 has an input line voltage ranging from 90-132VAC.  TB2 pin 1 is used as the hot terminal 
and is internally fused, TB2 pin 2 is used as the neutral terminal and TB2 pin 3 is the EGND terminal. The 
EGND terminal must be connected.
**NOTE:  The 10EMC1 Filter is required at the power input of the MLA1064\
1 driver.
Pin #Description
1 Step Clock Input Anode (+): 
A positive going edge on this isolated input advances the motor by 
one increment.  The size of the increment is dependent on the Microstep Select Inputs of\
 Switch 1.
2 Step Clock Input Cathode (-)
3 Direction Anode (+): This isolated input is used to change the direction of the motor.  Physical 
direction also depends on the connection of the motor windings.
4 Direction Cathode (-)
5 ON/OFF Anode (+): This isolated input is used to enable and disable the output section of \
the 
driver.  When HIGH (open), the outputs are enabled.  However, this input does not inhibit the step 
clock.
6 ON/OFF Cathode (-)
7 Fault Out (C):
 This is the collector of the optically isolated fault output.  When NO f\
ault occurs, this 
output will conduct current into the emitter.  Care must be taken to not pass more than 50mA of 
current through this transistor.
8 Fault Out (E):  This is the emitter of optically isolated fault output.
TB3: 5 Pin Input Terminal Description
Table 2: Pin descriptions for input terminal block connector (TB1)
Pin #Description
1 Motor Ground
2 Phase 1A: Phase 1 of the Step Motor
3 Phase 1B: Phase 3 of the Step Motor
4 Phase 2A: Phase 2 of the Step Motor
5 Phase 2B: Phase 4 of the Step Motor
Table 4: Pin descriptions for motor terminal block connector (TB3)
TB2: 3 Pin AC IN Terminal Description
Pin # Description
1 AC IN: Hot
2 AC IN: Neutral
3 EARTH GROUND (Must be connected)
Table 3: Pin descriptions for input terminal block connector (TB2)
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							10EMC1 Filter
The 10EMC1 filter is required at the power input of the 
MLA05641 driver.
The 10EMC1 filter is designed to remove EMI-RFI (noise) from 
the power line, such as common and differential mode noises.
A filter is usually located in a system right where the power meets 
the unit or driver, so that EMI/RFI does not affect the unit or be 
emitted from the power source, such as a cord.
The 10EMC1 filter helps prevent damages to the system. 
Specifications
Max. leakage current each Line to Ground:Hipot rating (one minute):
@120 VAC 60 Hz: .21 mA Line to Ground: 2250VDC
@250 VAC 50 Hz: .43mA Line to Line: 1450VDC
Rated Voltage (max): 250 VAC
Operating Frequency: 50/60 Hz
Rated Current: 10 A
Operating Ambient Temperature Range (@  rated current 
Ir): -10 0C to +40 0C
Electrical Schematic
Dimensions
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							10EMC1 Filter Continued
Typical Insertion Loss
Measured in closed 50 Ohm System
Minimum Insertion Loss
Common Mode/Assemetrical (Line to Ground)
Current Rating Frequency - MHz
.05 .07 . 11 .15 1210 2030
10A 5213 247272565048
Differential Mode/Symmetrical (Line to Line)
Current 
Rating Frequency - MHz
.05 .07. 11 .15 1210 2030
10A 141512 335458473436
Ordering Information
Manufacturer Part NumberDescription
Mouser 592-10EMC1Power Line Filters 10A 1/4”-1/4” FASTON FLANGE MOUNT
TE Connectivity / Corom 10EMC1Power Line Filters 10A 1/4”-1/4” FASTON FLANGE MOUNT
Digi-Key CCM1741-NDFILTER LINE RFI COMPACT DUAL 10A
Mouser 644-DNF14-250FIB-3K Terminals DISCO FEMALE FULLY- Insulated Disconnects
Panduit DNF14-250FIB-3K Terminals DISCO FEMALE FULLY-Insulated Disconnects
Ideal Industries 30-502Crimpmaster™ Crimp Tool, for RG-58 RG-59/62AU BNC/
TNC 3-Piece Hex Type Connectors
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							Absolute Maximum Ratings
Input Voltage: 132 VAC
Ouput Current: 10.0 AMPS PEAK
Max Plate Temperature: 70° C
Storage Temperature: 0° to +50°C
Input Voltage (For Isolated Inputs): +24V at 7mA
Fault Output Signal: Open Collector max. 30V/50mA (optically isolated)
Electrical Specifications:
ItemMinTy pMax Units
Input Voltage (Power) 9011 5132 VA C
Motor Bus Voltage 127160185 VDC
Phase Output Current 1.4147.07A (RMS)
Phase Output Current 2.010.0A (PEAK)
Input Voltage (Inputs) 3.524VDC
Clock Frequency 0400kHz
Chopping Frequency 283032 kHz
Operation Temperature 070C
Dimension Drawing
Figure 1: MLA10641 Dimensions
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							Hook Up Drawings
Figure 3: Hook up for current sourcing inputsFigure 2: Hook up for current sinking inputs
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							Motor Selection
The MLA10641 is a bipolar microstep driver that is compatible with both bipolar and unipolar 
motor configurations, (i.e. 8 and 4 lead motors, and 6 lead center-tapped motors).
Step motors with low current ratings and high inductance will perform better at low speeds,  pro-
viding higher low-end torque.  Motors with high current ratings and low inductance will perform 
better at higher speeds, providing more high-end torque.  Higher voltages will cause the current 
to  flow  faster  through  the  motor  coils.    This  in  turn  means  higher  step  rates  can  be  achieved.  
Care should be taken not to exceed the maximum voltage of the driver.
Since the MLA10641 is a constant current source, it is not necessary to use a motor that is rated 
at the same voltage as the supply voltage.  What is important is that th\
e MLA10641 is set to the 
appropriate current level based on the motor being used.  Refer to the following chart for setting 
the current potentiometer based on the current code in the part number of the motor.  Examples 
of motor part numbers are shown below.  Anaheim Automation offers a comprehensive line of step 
motors in various frame sizes.  Contact the factory to verify motor compatibility with the MLA10641.
Step Motor Current Setting Guide
Motor Current Number Code Unipolar 
Rating Series Peak 
Rating Parallel 
Peak Rating Series Current 
Setting Parallel Current 
Setting
02 1.0A1.0A 2.0A --- 0%
03 1.5A1.5A 3.0A ---20%
04 2.0A2.0A 4.0A 0% 30%
05 2.5A2.5A 5.0A 12% 42%
06 3.0A3.0A 6.0A 20% 52%
07 3.5A3.5A 7.0A 25% 65%
08 4.0A4.0A 8.0A 30% 75%
09 4.5A4.5A 9.0A 36% 85%
10 5.0A5.0A 10.0A 42% 100%
11 5.5A5.5A 11.0A 47% 100%
12 6.0A6.0A 12.0A 52% 100%
13 6.5A6.5A 13.0A 60% 100%
14 7.0A7.0A 14.0A 65% 100%
15 7.5A7.5A 15.0A 70% 100%
16 8.0A8.0A 16.0A 75% 100%
19 9.5A9.5A 19.0A 90% 100%
22 11.0A11.0A 22.0A 100% 100%
25 12.5A12.5A 25.0A 100% 100%
Figure 6: Table selection for Anaheim Automation motor current settings
Anaheim Automation offers motor cable, making hook-ups quick and easy!
Contact the factory or visit our website for more motor and cable offerings.
June 2012L010460  
						

							Microstep Selection (DIP Settings)
Switches 2, 3 and 4, of the DIP switch select the microstep resolution of the driver.  Table 7 shows 
the standard resolution values along with the associated positions for the select switches.  The 
standard waveforms are sinusoidal.  The steps/rev are based on a 200 step/rev motor.
ResolutionSteps/RevPosition 
1 Position 
2 Position 
3 Position 
4 Auto Reduce Current
1 200OFFONON ON Disabled
2 400OFFONONOFF Disabled
5 1000OFFONOFF ON Disabled
8 1600OFFONOFF OFF Disabled
10 2000OFFOFF ONON Disabled
16 3200OFFOFF ONOFF Disabled
32 6400OFFOFF OFF ON Disabled
64 12800OFFOFF OFF OFF Disabled
1 200ONON ON ON Enabled
2 400ONON ONOFF Enabled
5 1000ONONOFF ON Enabled
8 1600ONONOFF OFF Enabled
10 2000ONOFF ONON Enabled
16 3200ONOFF ONOFF Enabled
32 6400ONOFF OFF ON Enabled
64 12800ONOFF OFF OFF Enabled
Table 7: Microstep selection on switch 1
Setting the Output Current
The output current on the MLA10641 is set by an onboard potentiometer.  This potentiometer 
determines the per phase peak output current of the driver.  The relationship between the output 
current and the potentiometer value is as follows:
Peak Current Potentiometer Setting Peak CurrentPotentiometer Setting
2.00A 0%6.80A 60%
2.30A 10%7.50A 70%
3.00A 20%8.40A** 80%
4.00A 30%9.50A** 90%
4.80A 40%10.00A** 100%
5.75A 50%--------
Table 8: Potentiometer values with respect to the output current
Refer to Table 6 for specific motor current settings.
** Although the MLA10641 has an internal fan, current settings above 8.4Amp\
s (80%) may require additional cooling.
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							Reducing Output Current
Reducing the output current is accomplished by setting switch 1 of the DIP switch to the ON po-
sition. This should occur approximately after the last positive going edge of the step clock input.  
The amount of current per phase in the reduction mode is approximately 50% of the set current.
Determining Output Current
The output current for the motor used when microstepping is determined differently from that of 
a full/half step unipolar driver.  In the MLA10641, a sine/cosine output function is used in rotating 
the motor.  The output current for a given motor is determined by the motor’s current rating and 
wiring configuration. There is a current adjustment potentiometer used to set the output current 
of  the  MLA10641.   This  sets  the  peak  output  current  of  the  sine/cosine  waves.   The  specified 
motor current (which is the unipolar value) is multiplied by a factor of 1.0, 1.4, or 2.0 depending 
on the motor configuration (series, half-coil or parallel, respectively).
Step Motor Configurations
Step motors can be configured as 4, 6, or 8 leads.  Each configuration requires a different current.  
Refer to the lead configurations and procedures to determine their output current.
Warning! Step motors will run hot even when configured correctly.  Damage may occur to the 
motor  if  a  higher  than  specified  current  is  used.    Most  specified  motor  currents  are  maximum 
values.  Care should be taken to not exceed these ratings.
6 Lead Motors
When configuring a 6 lead motor in a half-coil configuration (connected from one end of the 
coil to the center tap), multiply the specified per Phase (or unipolar) current rating by 1.4 to de-
termine the current setting potentiometer value.  This configuration will provide more torque at 
higher speeds when compared to the series configuration.
When configuring the motor is a  series configuration (connected from end to end with the cen-
ter tap floating) use the specified per Phase (or unipolar) current rating to determine the current 
setting potentiometer value.
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