Anaheim Stepper 34MD Series Users Guide

							September 2012 L0105621
34MD Series
Motor/Driver Combination 
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 
						

							September 2012 L0105622
General Description
The 34MD Series is a compact construction that implements a microstepping driver and a stepper mo-
tor in one streamline package.  With the two parts combined into one casing, the need to include motor 
wires has been eliminated.  The 34MD Series has an output current capability of 1.5 Amps minimum to 
10.0 Amps maximum (Peak Rating).  The microstepping driver will operate off 20VDC minimum to 80VDC 
maximum.  The inputs are optically isolated with a minimum sourcing of 1.0 mA per input (+3.5VDC mini-
mum to +8.6VDC maximum).  The clock input is set to receive either positive or negative edge clocks with 
maximum frequency of 100KHz.  The microstepping driver features a resolution of 2000 steps/revolution, 
providing smooth rotary operation.  The 34MD series comes in motor stack lengths of 1, 2 or 3 allowing 
for varying amounts of start-up torque and inertia.  The 34MD series features include built in over current 
and short circuit shut down, automatic 50% reduction in current after clock pulses stop being received, 
and status LED’s to indicate power on (green LED) and clocks being received (yellow LED).  A power 
supply is required (purchase separately).
34MD Motor/Driver Combination Features
• Stepper Motor/Microstep Driver Combination
• Up to 1,700 oz-in
• Eliminates Motor Wires
• Compact Package
• 20-80V Power Requirement
• Optically Isolated Inputs
• Ideal for Precise Positioning
• 0.180° Resolution per Step
• Effi cient and Durable
• Long Life Expectancy 
• RoHS Compliant
0 4.7
9.4 14.1 18.8 23.5 28.2
32.9 37.6 42.347
0 100 200
300 400 500
0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25
POWER (Watts)TORQUE (oz-in)
SPEED (RPS)
34Y112S-LW8 w/34MD, 24VDC
TORQUEPOWER
0 4
8 12 16
20 24 28
32 36 40
0 160 320 480
640 800 960 1120 1280 1440
1600
02468101214161820
POWER (Watts)TOR QU E (oz-in)
SPEED (RPS)
34Y314S-LW8 w/34MD, 24VDC
TORQUEPOWER
0 10
20 30 40
50 60 70
80 90 100
0 160 320 480
640 800 960 1120 1280 1440
1600
0 3 6 9 12 15 18 21 24 27 30
POWER (Watts)TOR QU E (oz-in)
SPEED (RPS)
34Y314S-LW8 w/34MD, 48VDC
TORQUEPOWER
0 15
30
45
60
75
90105 120 135
150
0 100
200
300
400
500
600
700 800 900 10000 5 10 15 20 25 30 35 40 45 50
POWER (Watts)TORQUE  (oz -i n)
SPEED (RPS)
34M D214, 7A, 24V vs. 48V
48V To rq ue24V To rq ue48V Po wer24V Po wer 
						

							September 2012 L0105623
Optically Isolated Input Pin Descriptions
The inputs of the 34MD Series 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 1.0 mA needs to be sourced or sinked through the opto-diode.  This is done simply by 
placing a voltage of +3.5 to +8.6 VDC across the two inputs of the opto-diode.  If sourcing current into the 
inputs, then all three cathodes (-) should be tied together and grounded as shown in Figure 3.  If sinking 
current, then all three anodes (+) should be tied together to the +voltage as shown in Figure 4.
To enable an input, apply a DC voltage source of +5VDC to +8.6VDC across the inputs.  The Anodes (+) 
are pins 1, 3 and 5 the cathodes (-) are pins 2, 4 and 6.
Wiring Diagrams
Electrical Specifi cations
Table 1: 34MD Input Connector
Input Pin Descriptions
Pin # Description
1 Clock anode (+)
2 Clock cathode (-)
3 Direction anode (+)
4 Direction cathode (-)
5 On/Off anode (+)
6 On/Off cathode (-)
Power Pin Descriptions
Pin # Description
1 20 - 80VDC (Vin)
2 0VDC (Gnd)
Table 2: 34MD Power Connector
Item Min Typ Max Units
Input Voltage (Power) 20 80 VDC
Phase Output Current 1.1 7.1 A (RMS)
Phase Output Current 1.5 10.0 A (PEAK)
Input Voltage (Inputs) 3.5 8.6 VDC
Clock Frequency 0 100 kHz
Chopping Frequency 27 30 33 kHz
Operation Temperature 0 70 C
Direction: Active - CW
        Inactive - CCW
Clock: Active - 1 Step
  Inactive (open) - Reduce Current mode
On/Off: Active - Off
    Inactive (open) - On
Absolute Maximum Ratings
Input Voltage: 80 VDC
Output Current:10.0 AMPS PEAK
Max Plate Temperature: 80°C
Storage Temperature: 0° to +50°C Table 3: Electrical Specifi cations 
						

							September 2012 L0105624
Dimensions
Model L D D1
34MD1123S 5.37” 0.5” 0.555”
34MD214S 6.87” 0.5” 0.555”
34MD314S 8.37” 0.625” 0.68”
Table 4: 34MD Stack Lengths and Diameters
Power Supply Requirements
It is recommended that the 34MD series be powered by the PSA80V4A or the PSAM48V3.2A. The 
PSA80V4A is 80 Volt, 4 Amp power supply that will take either 110VAC or 220VAC inputs and deliver 
320 Watts.  The PSAM48V3.2A is a 48 Volt, 3.2 Amp power supply with a universal input to accept input 
voltages in the range of 95 - 265VAC and deliver 150Watts.
Power Supply Drawings for PSA80V4A and PSAM48V3.2A
Setting the Output Current
WARNING: When using a higher current setting into a motor, the motor will overheat and burn up.  
Should this occur, the driver will be damaged.  Use additional airfl ow and heatsinks to keep the 
motor and driver temperature under 80°C.
The output current on the 34MD Series 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. 
						

							September 2012 L0105625
Peak Current Potentiometer Setting Peak Current Potentiometer Setting
1.5A 0% 7.0A 60%
2.3A 10% 7.9A 70%
3.1A 20% 8.7A 80%
4.0A 30% 9.6A 90%
5.0A 40% 10A 100%
6.0A 50% -- --
Table 5: Potentiometer values with respect to the output current
Reducing Output Current
Reducing the output current occurs approximately 1 second 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 cur-
rent.  Reducing the output current is accomplished when no current fl ows through the opto-diode at the 
CLOCK (+) and CLOCK (-) pins after the last step has occurred.  The clock LED should be off at this time.
Determining Output Current
The output current for the stepper motor being used when microstepping is determined differently from 
that of a full/half step unipolar driver.  In the 34MD Series, a sine/cosine output function is used in rotating 
the motor.  The output current for a given motor is determined by the motors current rating and the wiring 
confi guration of the motor.  There is a current adjustment potentiometer used to set the output current of 
the 34MD Series.  This sets the peak output current of the sine/cosine waves.  The specifi ed motor cur-
rent (which is the unipolar value) is multiplied by a factor of 1.0 due to the motor confi guration in series.
WARNING: When using a higher current setting into a motor, the motor will overheat and burn up.  
Should this occur, the driver will also be damaged. Use additional airfl ow and heatsink to keep 
motor and driver temperature under 80°C. 
						

							September 2012 L0105626
ANAHEIM AUTOMATION
COPYRIGHT 
Copyright 2012 by Anaheim Automation. All rights reserved. No part of this publication may be reproduced, 
transmitted, transcribed, stored in a retrieval system, or translated into any language, in any form or by 
any means, electronic, mechanical, magnetic, optical, chemical, manual, or otherwise, without the prior 
written permission of Anaheim Automation, 910 E. Orangefair Lane, Anaheim, CA 92801. 
DISCLAIMER
Though every effort has been made to supply complete and accurate information in this manual, the 
contents are subject to change without notice or obligation to inform the buyer. In no event will Anaheim 
Automation be liable for direct, indirect, special, incidental, or consequential damages arising out 
of the use or inability to use the product or documentation.  
Anaheim Automation’s general policy does not recommend the use of its’ products in life support applications 
wherein a failure or malfunction of the product may directly threaten life or injury.  Per Anaheim Automation’s 
Terms and Conditions, the user of Anaheim Automation products in life support applications assumes all 
risks of such use and indemnifi es Anaheim Automation against all damages.
LIMITED WARRANTY
All Anaheim Automation products are warranted against defects in workmanship, materials and construction, 
when used under Normal Operating Conditions and when used in accordance with specifi cations.  This 
warranty shall be in effect for a period of twelve months from the date of purchase or eighteen months 
from the date of manufacture, whichever comes fi rst. Warranty provisions may be voided if products 
are subjected to physical modifi cations, damage, abuse, or misuse.
Anaheim Automation will repair or replace at its’ option, any product which has been found to be defective 
and is within the warranty period, provided that the item is shipped freight prepaid, with previous authorization 
(RMA#) to Anaheim Automation’s plant in Anaheim, California. 
TECHNICAL SUPPORT
If you should require technical support or if you have problems using any of the equipment covered by this 
manual, please read the manual completely to see if it will answer the questions you have. If you need 
assistance beyond what this manual can provide, contact your Local Distributor where you purchased the 
unit, or contact the factory direct.