STR2 Hardware Manual 920-0059B
Contents
1. 48 VDC 40 920 0059B 1 30 2014 STR2 Hardware Manual HT17 271 STR2 Connection parallel 12VDC 24VDC 48 VDC Drive settings 2 04A phase 20000 steps rev 60 rps HT17 275 STR2 Connection parallel 12VDC 24VDC 48 VDC Drive settings 2 04A phase 20000 steps rev 920 0059B 1 30 2014 STR2 Hardware Manual HT23 595 STR2 Connection series 12VDC 24VDC 48 VDC Drive settings 2 2A phase 20000 steps rev rps HT23 598 STR2 Connection series 12VDC 24VDC 48 VDC Drive settings 2 2A phase 20000 steps rev 40 50 920 0059B 1 30 2014 STR2 Hardware Manual HT23 601 STR2 Connection series 12VDC 24VDC 48 VDC Drive settings 2 2A phase 20000 steps rev rps Motor Heating Step motors convert electrical power from the driver into mechanical power to move a load Because step motors are not perfectly efficient some of the electrical power turns into heat on its way through the motor This heating is not so much dependent on the load being driven but rather the motor speed and power supply voltage There are certain combinations of speed and voltage at which a2. Read all available documentation before assembly and commissioning Incorrect handling of products in this manual can result in injury and damage to persons and machinery Strictly adhere to the technical information on the installation requirements It is vital to ensure that all system components are connected to earth ground Electrical safety is impossible without a low resistance earth connection The STR2 contains electrostatically sensitive components that can be damaged by incorrect handling Discharge yourself before touching the product Avoid contact with high insulating materials artificial fabrics plastic film etc Place the product on a conductive surface During operation keep all covers and cabinet doors shut Otherwise there are deadly hazards that could possibility cause severe damage to health or the product 920 0059B 1 30 2014 STR2 Hardware Manual In operation depending on the degree of enclosure protection the product can have bare components that are live or have hot surfaces Control and power cables can carry a high volt age even when the motor is not rotating Never pull out or plug in the product while the system is live There is a danger of electric arc ing and danger to persons and contacts After powering down the product wait at least ten minutes before touching live sections of the equipment or undoing connections e g contacts screwed connections Capa
3. Connecting to Indexer with Sinking Outputs u ee n 920 0059B 1 30 2014 STR2 Hardware Manual Connection Examples EN ee ee a 5 24 VDC switch or relay STR2 Power closed logic low Supply Co Connecting an Input to a Switch or Relay I I 1 524 STR Power Connecting another drive to EN When output closes input closes Connecting an NPN Type Proximity Sensor to an input When prox sensor activates input closes 920 0059B 1 30 2014 STR2 Hardware Manual FAULT Output ee The STR2 features a digital FAULT output This output closes to A signal a fault condition This output can be used to drive LEDs relays and the inputs of other electronic devices like PLCs The collector and emitter terminals of the output transistor are available at the connector This allows you to configure the output for current sourcing or sinking Do not connect the output to more than 30VDC Diagrams of each type of connection follow The current through the output terminal must not exceed 80 mA Sinking Output Sourcing Output 5 24 VDC Power Supply Driving a Relay 920 0059B 1 30 2014 STR2 Hardware Manual Configuring the Drive Step 1 Selecting a Motor and Setting the Current The STR2 is optimized for use with carefully selected motors To select a motor si
4. Technical Specifications Mating Connectors and Accessories Alarm Codes Connector Ae 920 0059B 1 30 2014 STR2 Hardware Manual Safety Instructions Only qualified personnel are permitted to transport assemble commission and maintain this equipment Properly qualified personnel are persons who are familiar with the transport assembly installation commissioning and operation of motors and who have the appropri ate qualifications for their jobs The qualified personnel must know and observe the following standards and regulations IEC 364 resp CENELEC HD 384 or DIN VDE 0100 IEC report 664 or DIN VDE 0110 National regulations for safety and accident prevention or VBG 4 To minimize the risk of potential safety problems you should follow all applicable local and na tional codes that regulate the installation and operation of your equipment These codes vary from area to area and it is your responsibility to determine which codes should be followed and to verify that the equipment installation and operation are in compliance with the latest revision of these codes Equipment damage or serious injury to personnel can result from the failure to follow all ap plicable codes and standards We do not guarantee the products described in this publica tion are suitable for your particular application nor do we assume any responsibility for your product design installation or operation
5. disabled flashing green no alarm motor enabled i green 3 red over temperature 90000 2 green 3 red internal voltage out of range 1 green 4 red power supply voltage too high 000000 2 green 4 red power supply voltage too low 0000090 1 green 5 red over current short circuit 09000000 1 green 6 red open motor winding Connector Diagrams 84022 m 301 Power and Motor Connector Signal Connector 404 Westridge Drive Watsonville CA 95076 Tel 831 761 6555 800 525 1609 Fax 831 761 6544 www applied motion com 920 0059B 1 30 2014
6. illustrated below These are detailed later in the manual Motor amp Power Supply Connector Status LEDs SWITCH A SWITCH B Self Test Motor Selection i i Load Inertia n b vd Input amp Output Signals Run Current Steps rev 920 0059B 1 30 2014 STR2 Hardware Manual Mounting the Drive You can mount your drive on the wide or the narrow side of the chassis using 6 screws If possible the drive should be securely fastened to a smooth flat metal surface that will help conduct heat away from the chassis If this is not possible then forced airflow from a fan may be required to prevent the drive from overheating See Drive Heating for more details e Never use your drive a space where there is no air flow or where other devices cause the surrounding air to be more than 50 C Never put the drive where it can get wet or where metal or other electrically con ductive particles can get on the circuitry e Always provide air flow around the drive When mounting multiple drives near each other maintain at least one half inch of space between drives Connecting the Power Supply If you need information about choosing a power supply please read the section Choosing a Power Supply Connect the power supply terminal to the connector terminal labeled V Connect power supply to the connector terminal labeled V The green ground screw on the corner of the chassis should be connected to earth gr
7. kinetic energy of that load is transferred back to the power supply This can trip the overvoltage protection of a switching power supply causing it to shut down Unregulated power supplies are better because they generally do not have overvoltage protection and have large capacitors for storing energy coming back from the drive They are also less expensive See previous section on Connecting the Power Supply for details on the RC 050 regeneration clamp System Wiring Recommendations 1 Separate the DC power supply cable by at least 2 from the small signal input cable and the encoder feedback cable 2 Ashielded cable for the DC power supply connections will result in a quieter system Ground the shield at the power supply 3 Ashielded cable is recommended for the small signal connections Ground the shield at the signal source 920 0059B 1 30 2014 STR2 Hardware Manual Connecting the Motor N Never connect or disconnect the motor while the power is on If the motor has a shield or grounding wire please connect it to the chassis ground screw located on the chassis near the motorpower connector Four Lead Motor These motors can only be connected one way Please follow the sketch below Chassis Ground Screw 4 MOTOR POWER lead CONNECTOR motor r MOTORA Blue lt lt gt gt Ug UJ TI T 1 Yellow White B B 4 Leads Eight Lead Motor These motors can be connected in series or
8. parallel A series connected motor needs less cur rent than one that is connected in parallel but it will not be able to run as fast Once you have determined which way you want to connect your motor to the drive please follow the wiring diagrams below A Drange Axe Orange 8 BIk Wht 8 lead lead BIK Wht motor Org motor Wht A Black 4 Black Yel Red low Rem yey Yellow uu pg Wht Wht B wrt 8 Leads Parallel Connected 8 Leads Series Connected 920 0059B 1 30 2014 Connecting Input Signals The STR drives have three inputs STR2 Hardware Manual STEP a high speed digital input for step pulse commands 5 24 volt logic DIR a high speed digital input for the direction signal 5 24 volt logic EN a 5 24V input for commanding the removal of power from the motor EN input must be open 50 milliseconds before pulses are received Note STEP and DIR inputs can be converted to STEP CW and STEP CCW by moving the inter nal jumper See Step 6 Step Pulse Connector Pin Diagram Internal Circuit Diagram SSeS mem rs inside drive 220 pF gar Z s 004 1 e I mop CDR I 20 9 1 EN la M de Y OUT Connection Examples STEP amp DIR See System Wiring Recommendations for cable instructions V OUT Indexer with Sinking Outputs
9. temp on 4 75 x 4 75 x 25 Aluminum Plate 12V 24N INT OT STR2 Hardware Manual 80 60 40 20 100 4 20 Speed RPS 25 HT17 268 Max Duty cycle vs Speed 1 61A phase parallel connected 40 C ambient temp on 4 75 x 4 75 x 25 Aluminum Plate 30 35 12N 24N 48V TENDER 40 80 o Az 20 20 Speed RPS 25 30 35 40 Duty Cycle Duty Cycle 100 80 AB o 20 100 80 60 40 20 920 0059B 1 30 2014 STR2 Hardware Manual HT17 271 Max Duty cycle vs Speed 2 04A phase parallel connected 24V 40 C ambient temp 48V on 4 75 x 4 75 x 25 Aluminum Plate 0 5 10 15 20 25 30 35 40 Speed RPS HT17 275 Max Duty cycle vs Speed av 2 04A phase parallel connected 24v 40 C ambient temp 48 4 75 4 75 25 Aluminum Plate 0 5 10 15 20 25 30 35 40 Speed RPS 920 0059B 1 30 2014 Drive Heating While STR2 drivers efficiently transmit power between the power supply and motor they do generate some heat in the process This will cause the temperature of the drive to rise above the surrounding air temperature and may also require that the d
10. 0 steps rev and beyond The STR drives include a feature called microstep emulation also called step smoothing that can provide smooth motion from coarse command signals By selecting 200 smooth or 400 smooth this feature is automatically employed to provide the smoothest possible motion from a less than ideal signal source Because a command filter is used as part of the step smoothing process there will be a slight delay or lag in the motion If this delay is objectionable for your application please choose the non filtered setting 200 or 400 The chart on the next page shows an example of the delay that can occur from using the step smoothing filter 400 200 SMOOTH 1 2000 9000 920 0059B 1 30 2014 STR2 Hardware Manual Motion Profile with Step Smoothing Filter revisec Seconds Step 6 Step Pulse Type Most indexers and motion controllers provide motion commands in the Step and Direction format The Step signal pulses once for each motor step and the direction signal commands direction However a few PLCs use a different type of command signal one signal pulses once for each desired step in the clockwise direction called STEP CW while a second signal pulses for counterclockwise motion STEP CCW The STR drives can accept this type of signal if you remove the drive cover and move jumper S3 from the 1 2 position to the 1 3 position In STEP CW STEP CCW m
11. 16 kHz PWM Suitable for driving two phase step motors with four six or eight leads Protection against over voltage under voltage over temp and short circuit Supply voltage 12 48 VDC Under voltage alarm 10 VDC Over voltage shutdown 52 VDC Motor current 0 3 to 2 2 amps phase peak of sine Optically isolated 5 24V logic Sinking NPN signals mus be used Drive steps on rising edge of STEP input Minimum on voltage 4 VDC Maximum voltage 30 VDC Input current 5 mA typ at 4V 15 mA typ at 30V Maximum pulse frequency 150 kHz or 2 MHz set by switch Minimum pulse width 3 usec at 150 kHz setting 0 25 usec at 2 MHz setting Photodarlington 80 mA 30 VDC max Voltage drop 1 2V max at 80 mA 0 82 x 2 21 x 3 65 inches 20 8 x 56 x 92 6 mm overall 4 7 oz 133 g including mating connectors Ambient temperature range 0 C to 50 C Operating temperature range 0 C to 85 C interior of electronic section 920 0059B STR2 Hardware Manual 1 30 2014 Mating Connectors and Accessories Mating Connectors Motor power supply Phoenix Contact 1803617 included with drive Signals Phoenix Contact 1840405 included with drive Accessories Regeneration Clamp Applied Motion Products Alarm Codes In the event of a drive fault or alarm the green LED will flash one or two times followed by a series of red flashes The pat tern repeats until the alarm is cleared Code Error solid green no alarm motor
12. A 932 5 B C HT23 Outline Drawing MOTOR LENGTH L HT23 395 595 41 mm MAX HT23 398 598 54 mm MAX HT23 401 601 76 mm MAX 920 0059B 1 30 2014 STR2 Hardware Manual Torque Speed Curves 08 020 STR2 Connection 4 leads 12 VDC 24 VDC Drive settings 0 42A phase 20000 steps rev 2 5 2 1 5 S N 1 0 5 e A n 0 5 10 15 20 25 30 35 40 rps HT08 021 STR2 Connection 4 leads 12 VDC 24 VDC Drive settings 0 42A phase 20000 steps rev 35 40 920 0059B 1 30 2014 STR2 Hardware Manual HT11 012 STR2 Connection 4 leads 12 VDC 24 VDC Drive settings 1 2A phase 20000 steps rev oz in N O o N e rps HT11 013 STR2 Connection 4 leads 12 VDC 24 VDC Drive settings 1 2A phase 20000 steps rev 14 12 10 oz in oz in 25 20 15 10 5014 042 STR2 STR2 Hardware Manual 920 0059B 1 30 2014 HT17 268 STR2 Connection parallel Drive settings 1 61A phase 20000 steps rev Connection 4 leads 12 VDC 24 VDC Drive settings 1 2A phase 20000 steps rev 0 5 10 15 20 25 30 35 40 rps 12VDC 24
13. Hardware Manual STR2 Step Motor Drive Applied Motion Products 920 0059B 1 30 2014 920 0059B 1 30 2014 STR2 Hardware Manual Contents Safety INSITUCHONS dct P a Introduction FO ACULES 5 BUCK u 6 Getting Started Mounting the Drive rS Connecting the Power Supply WHO Choosing a Power Supply Voltage Current Multiple Drives Sharing One Power Supply 11 System Wiring Recommendations atis 12 Connecting the Motor Four MOTOR L b Motore Connecting Input Signals n Connector Pin Diagram r IDEEN Connection Examples STEP amp DIR E Internal Circuit Diagram Connection Examples NAM FAULT QUU e tette Configuring the Drive Step 1 Selecting a Motor and Setting the Current Step 2 Fine Tuning the Motor Current Step 3 Setting Idle 18 Step 4 Load Inertia ttis Step 5 Step Size Step Step Pulse Type Step 7 Step Pulse Noise Filter Self Test Reference Materials EE MILL xl uc Torque Speed Curves Motor ee into Mechanical Outline
14. MIN d 2 26 00 2X 13 00 2 4 40 STUDS 920 0059B 1 30 2014 STR2 Hardware Manual 305 MIN 4X 4 40 UNC 4 3 MIN DEEP 6 TYP 0 95 000 0 012 So s 1 31 00 4 5t0 15 FLAT F 2X 15 50 4 5 0 15 154 25 2 56 UNC TAP FLAT 4 5 MIN DEEP EQ SP MOTOR LENGTH L ON 932 5 17 068 33 1 17 071 39 1 mm ADD D TO END OF PART NUMBER TO ADD HT17 075 471mm REAR SHAFT AND ENCODER HOLES HT17 268 33 3 mm MAX HT17 Outline Drawing 5 10 ADD D TO END OF PART NUMBER TO ADD Ly REAR SHAFT AND ENCODER HOLES 457 MIN 4X R4 6 15 0 25 5 0 258 1 0 03 4 5 2 0 25 m 1 1 650 2 I 15 0 25 7 T 0 5 X 45 n P s rnm re 96 35 0 013 ON ox ho 8 1 b 1 2 zE 2 Li 2 3 0 2X 47 14 s lt 96 35 0 013 1 4 I 0 5 X 45 5 8 16 1 20 0 5 5 8 0 15 2X 42 56 UNC TAP THRU EQ SP ON
15. citors can store dangerous voltages for long periods of time after power has been switched off To be safe measure the contact points with a meter before touching Be alert to the potential for personal injury Follow the recommended precautions and safe operating practices Safety notices in this manual provide important information Read and be familiar with these instructions before attempting installation operation or maintenance The purpose of this section is to alert users to possible safety hazards associated with this equip ment and the precautions that need to be taken to reduce the risk of personal injury and dam age to the equipment Failure to observe these precautions could result in serious bodily injury damage to the equipment or operational difficulty 920 0059B 1 30 2014 STR2 Hardware Manual Introduction Thank you for selecting an Applied Motion Products motor control We hope our dedication to performance quality and economy will make your motion control project successful If there s anything we can do to improve our products or help you use them better please call or fax Wed like to hear from you Our phone number is 800 525 1609 or you can reach us by fax at 831 761 6544 You can also email support applied motion com Features Low cost digital step motor driver in compact package Operates from a 12 to 48 volt DC power supply Running current up to 2 2 amps per phase Operate
16. e cost get one power supply with more than twice the rated current of the motor Install the motor in the application and monitor the current coming out of the power supply and into the drive at various motor loads This will tell you how much current you really need so you can design in a lower cost 920 0059B 1 30 2014 STR2 Hardware Manual power supply The tables below and on the net page list the maximum current required for each motor at sev eral common power supply voltages Please consider this information when choosing a power supply Table 1 STR2 Power Supply Current All motors connected as indicated e Setting A 12VDC 24VDC HT08 020 095A 095A HT08 021 095A 095A HT11 012 0 6A 11 013 095A 095 5014 042 087A 087A HT17 268 10 17 271 13A 17 275 132A 132A HT23 599 136A 136A HT23 598 156A 156A HT23 601 14 Multiple Drives Sharing One Power Supply You can use one supply to power multiple drives The worst case condition occurs when all the drives are running simultaneously In this case just add up the power supply currents for each to determine the total power supply current requirement 920 0059B 1 30 2014 STR2 Hardware Manual Regeneration If you plan to use a regulated power supply you may encounter a problem with regeneration If you rapidly decelerate a load from a high speed much of the
17. motor cannot be continuously operated without damage We have characterized the recommended motors in our lab and provided a table and sev eral curves showing the maximum duty cycle versus speed for each motor at commonly used power supply voltages Please refer to this information when planning your application Please also keep in mind that a step motor typically reaches maximum temperature after 30 to 45 minutes of operation If you run the motor for one minute then let it sit idle for one minute that is a 50 duty cycle Five minutes on and five minutes off is also 50 duty However one hour on and one hour off has the effect of 100 duty because during the first hour the motor will reach full and possibly excessive temperature 920 0059B 1 30 2014 STR2 Hardware Manual The actual temperature of the motor depends on how much heat is conducted convected or radiated out of it Our measurements were made in a 40 C 104 F environment with the motor mounted to an aluminum plate sized to provide a surface area consistent with the motor power dissipation Your results may vary PNS Max Duty Cycle at 40 C Ambient Setting A 08 020 HTO8 021 HT11 012 HT11 013 R 5014 042 HT17 268 17 271 HT17 275 NR power supply voltage is not recommended for this motor 920 0059B 1 30 2014 100 4 Duty Cycle Duty Cycle 1 2 Amps phase 5014 042 Max Duty cycle vs Speed 40 C ambient
18. mply move switches B1 B2 and B3 to the setting that corresponds to the motor of your choice You can do this while power is on but it is safer to select the motor before applying power to the drive so that you do not risk applying too much current to your motor mes see om eee 123 123 123 123 123 123 123 123 123 d 920 0059B 1 30 2014 STR2 Hardware Manual Step 2 Fine Tuning the Motor Current The maximum current for the motor you have selected was set automatically when you selected the motor in Step But you may want to reduce the current to save power or lower motor temperature This is important if the motor is not mounted to a surface that will help it dissipate heat or if the ambient temperature is expected to be high Step motors produce torque in direct proportion to current but the amount of heat generated is roughly proportional to the square of the current If you operate the motor at 90 of rated current you ll get 90 of the rated torque But the motor will produce approximately 81 as much heat At 70 current the torque is reduced to 70 and the heating to about 50 Switches A4 and A5 on the front of the STR2 drive are used to set the percent of rated current that will be applied to the motor Please set
19. ode the CW signal should be connected to the STEP input and the CCW signal to the DIR input Step amp Direction STEP CW amp STEP CCW 920 0059B 1 30 2014 STR2 Hardware Manual Step 7 Step Pulse Noise Filter Just when you thought there couldn t be any more to know about step signals we present one more setting for your consideration Electrical noise can affect the STEP signal in a negative way causing the drive to think that one step pulse is two or more pulses This results in extra motion and inaccurate motor and load positioning To combat this problem the STR drives include a digital noise filter on the STEP and DIR inputs There are two settings for this filter 150 kHz works well for most applications If you are operating the STR2 at a high number of steps rev and at high motor speeds you will be commanding the drive at step rates above 150 kHz In such cases you should use the 2 MHz setting as shown below The step noise filter is controlled by switch 4 of the small bank of switches Your maximum pulse rate will be the highest motor speed times the steps rev For example 40 revs second at 20 000 steps rev is 40 x 20 000 800 kHz Please consider this when deciding if you must increase the filter frequency 150 2 0 KHZ MHZ Self Test If you are having trouble getting your motor to turn you may want to try the built in self test Anytime switch A1 is moved to the ON position the drive will automatically ro
20. ound Use 18 or 20 gauge wire The STR drives contain an internal fuse that connects to the power supply terminal This fuse is not user replaceable If you want to install a user serviceable fuse in your system install a fast acting 3 amp fuse in line with the power supply lead Be careful not to reverse the wires Reverse connection will destroy your drive void your warranty and generally wreck your day 920 0059B 1 30 2014 STR2 Hardware Manual Power Supply and Ground Connections Locate fuse in line with connection If you plan to use a regulated power supply you may encounter a problem with regeneration If you rapidly decelerate a load from a high speed much of the kinetic energy of that load is transferred back to the power supply This can trip the overvoltage protection of a switching power supply causing it to shut down We offer the RC 050 regeneration clamp to solve this problem If in doubt buy an RC 050 for your first installation If the regen LED on the RC 050 never flashes you don t need the clamp regen LED RC 050 Regen Clamp 920 0059B 1 30 2014 STR2 Hardware Manual Choosing a Power Supply When choosing a power supply there are many things to consider If you are manufacturing equipment that will be sold to others you probably want a supply with all the safety agency approvals If size and weight are an issue get a switching supply And you must decide wha
21. rive be mounted to a heat conducting metal surface For those who wish to calculate the power dissipation and temperature rise the following infor mation is provided 1 drive power dissipation versus motor current and power supply voltage see chart 2 drive thermal constant R The final drive case temperature is given by Le lang pi where T is the ambient temperature of the surrounding air The case of the drive should not be allowed to exceed 70 C or the life of the product could be reduced Drive thermal constant Narrow side of drive mounted on a 13 5 x 13 5 steel plate 070 thick R 1 84 C W Narrow side of drive mounted on a non heat conducting surface R 3 99 C W Driver Loss W STR Drive Losses 48V 24N 12V STR2 Hardware Manual 0 4 0 6 0 8 12 14 motor current A 1 6 2 2 920 0059B 1 30 2014 C E 260 L ECI v6 0 8 7 610 8121 980 9 71 8S0 LE 802 280 E TI 9 28 S Y 8109 534 SYOLIANNOD DNILYW 6011 cv O 902 SI ldc S ES 09 0 9S Ide 0161 2271 9 G8 9 26 S9E STR2 Hardware Manual Mechanical Outline 920 0059B 1 30 2014 Technical Specifications Amplifier Digital Inputs Fault Output Physical STR2 Hardware Manual Digital MOSFET
22. rtia to determine the ratio then set switch B4 as shown For assistance in calculating the load inertia of your application contact our Applications department 9 10X 0 4 Step 5 Step Size The STR2 requires a source of step pulses to command motion This may be a PLC an indexer a motion controller or another type of device The only requirement is that the device be able to produce step pulses whose frequency is in proportion to the desired motor speed and be able to smoothly ramp the step speed up and down to produce smooth motor acceleration and deceleration Smaller step sizes result in smoother motion and more precise speed but also require a higher step pulse frequency to achieve maximum speed The smallest step size of the STR2 is 1 20 000th of a motor turn To command a motor speed of 50 revolutions per second 3000 rpm the step pulses frequency must be 50 x 20 000 1 MHz Many motion devices especially PLCs cannot provide step pulses at such a high speed If so the drive must be set for a lower number of steps per revolution Six different settings are provided in the STR2 drive as shown in the table on the next page 920 0059B 1 30 2014 STR2 Hardware Manual Please choose the one that best matches the capability of your system At lower step resolutions such as 200 steps rev full step and 400 steps rev half step motors run a little rough and produce more audible noise than when they are microstepped 200
23. s from Step amp Direction signals or Step CW amp Step CCW jumper selectable Enable input Fault output Optically isolated I O Digital filters prevent position error from electrical noise on command signals switch selectable 150 kHz or 2 MHz Electronic damping and anti resonance Automatic idle current reduction to reduce heat when motor is not moving Switch selectable 50 or 90 of running current Switch selectable step resolution 200 full step 400 half step 2000 5000 12800 or 20000 steps rev Switch selectable microstep emulation provides smoother more reliable motion in full and half step modes Self test switch selectable 920 0059B 1 30 2014 STR2 Hardware Manual Block Diagram 12 48 VDC from external power supply 3 3 5 15V Regulators Status LEDs STEP DIR EN Steps rev Run Current Idle Current Step Noise Filter Self Test OUT Load Inertia Step Pulse Type Motor Selection 920 0059B 1 30 2014 STR2 Hardware Manual Getting Started To use your STR2 step motor drive you ll need the following a 12 to 48 volt DC power supply Please read the section Choosing a Power Supply for help in choosing the right power supply one ofthe motors listed recommended in this manual a small flat blade screwdriver for tightening the connectors a source of step signals such as a PLC or motion controller The connectors and other points of interest are
24. t size of power supply in terms of voltage and current is needed for your application Applied Motion offers three powers supplies that are excellent matches for the STR2 drive PS50A24 24V 2 1A P5150A24 24V 6 3A and PS320A48 48V 67 Voltage Your motor can provide more torque at higher speeds if a higher power supply voltage is used Please consult the speed torque curves later in this manual for guidance If you choose an unregulated power supply make sure the no load voltage of the supply does not exceed the drive s maximum input voltage specification Current The maximum supply current you could ever need is two times the motor current However you will generally need a lot less than that depending on the motor type voltage speed and load conditions That s because the STR uses a switching amplifier converting a high voltage and low current into lower voltage and higher current The more the power supply voltage ex ceeds the motor voltage the less current you ll need from the power supply A motor running from a 48 volt supply can be expected to draw only half the supply current that it would with a 24 volt supply We recommend the following selection procedure 1 If you plan to use only a few drives get a power supply with at least twice per phase current rating of the step motor Example for a motor that s rated for 2 A phase use 4 A power supply 2 If you are designing for mass production and must minimiz
25. tate the motor back and forth 2 5 turns in each direction This feature can be used to confirm that the motor is correctly wired selected and otherwise operational ON OFF SELF TEST Motor Outlines 12 0 Reference Materials l 2x 2040 5 STR2 Hardware Manual 1 5 151 0 0 05 A 0 05 B 0 L 2X 94 000 0 012 BENO 2X 0 5 X 45 TYP MOTOR LENGTH L LABEL 0 HT08 020 30 0 mm opposite side 915 00 0 03 8 021 46 5 mm 8 08 Outline Drawing AC pa Lt 1 50 0 2 12 1 20 0 5 11 0 05 A 0 05 937 50 1 i gt 2x 28 40 3 4 EE i 5 L 2x 45 000 Oo 2X 0 5 X 45 LABEL 2X 4 40 UNC ON 619 05 750 MOTOR LENGTH L 022007003 BOLT CIRCLE HT11 012 33 5 mm HT11 013 47 5 mm HT11 Outline Drawing mm o MAX e 2X 2 56 TAP e 1 50 0 1 ON A 919 05 B C 14 2 0 5 11 0 08 0 05 241 o En 05 000 545 i L 5 X 45 10 0 0 Bo 2 85 0 2 7 11 1 52 2 922 00 0 03 5014 042 Outline Drawing 920 0059B 1 30 2014 4X M2 X 0 4 2 0 MIN 200 MIN 2x x 0 2 2 1150 4X M2 6 X 45 3 0 y MIN 305
26. them according to the illustration below 100 907 80 70 Step 3 Setting Idle Current Motor heating and power consumption can also be reduced by lowering the motor current when it is not moving The STR2 will automatically lower the motor current when it is idle to either 50 or 90 of the running current The 50 idle current setting will lower the holding torque to 50 which is enough to prevent the load from moving in most applications This reduces motor heating by 75 In some applications such as those supporting a vertical load it is necessary to provide a high holding torque In such cases the idle current can be set to 90 as shown below The idle current switch is located in switch bank A on the front of the STR2 s 50 90 920 0059B 1 30 2014 STR2 Hardware Manual Step 4 Load Inertia The STR drives include anti resonance and electronic damping features which greatly improve motor performance To perform optimally the drive must understand the electromechanical characteristics of the motor and load Most of this is done automatically when you select the motor using switches B1 B2 and B3 To further enhance performance you must set switch B4 to indicate the approximate inertia ratio of the load and motor The ranges are 0 to 4X and 5 to 10X The motors table shown in Step 1 of this section include the rotor inertia of each motor Please divide the load inertia by the rotor ine
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