User's Manual MS2035MXD
Contents
1. use only few drives get a power supply with at least twice the rated phase current of the motor 2 If you are designing for mass production and must minimize cost get 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 power supply If you plan to use a regulated power supply you may encounter a problem with current foldback When you first power up your drive the full current of both motor phases will be drawn for a few milliseconds while the stator field is being estab lished After that the amplifiers start chopping and much less current is drawn from the power supply If your power supply thinks this initial surge is a short circuit it may foldback to a lower voltage With many foldback schemes the voltage returns to normal only after the first motor step and is fine thereafter In that sense unregulated power supplies are better They are also less expensive 13 Mounting the Drive You can mount your drive on the wide or the narrow side of the chassis If you mount the drive on the wide side use 4 screws through the four corner holes For narrow side mounting applications you can use 4 screws in the two side holes 4 screws nar2. 820 ohm 1 4 watt resistors ometer is recommended and should be connected as shown below For 24 volt logic use 2200 ohm 1 4 watt resistors The 5V terminal is an output Do not connect it to a power supply PLC with Sinking Outputs Connecting to PLC with Sinking NPN Outputs Most PLC s use 24 volt logic PLC with ourcin 5 Outputs Connecting an Analog Input Potentiometer A 0 to 5 volt analog signal may also be used Usually this signal comes from a PLC a PC with data aquisition card or a motion controller Connections are shown below Connecting to PLC with Sourcing PNP Outputs ne Most PLC s use 24 volt logic run stop switch oO closed run 1 1 Q direction switch i i 2200 direction switch 1 ovat 0 5V speed signal 5 5 signal return Using Mechanical Switches to Control Run Stop and Direction Connecting an Analog Input to an Active Signal 9 10 Programmable Output The programmable output can be used to drive an LED relay or the input of another electronic device like a PLC or counter The collector and emitter termi nals of the phototransistor are available at the connector This allows you to configure the output for current sourcing or sinking Diagrams of each type of connection are shown below Do not connect the output to more than 30VDC The curr
3. User s Manual MS2035MXD Two Axis Step Motor Drive MOONS motors drives controls gear box power Contents troduction 4 SS eme E EER 4 OMAN ee 4 Getting Starte dpe eter a nena cs cu ae 5 Connecting 6 1 eee 6 8 7 Step and 8 8 9 Connecting to the Analog INputs 4 0 10 Programmable 11 Schematic Diagram of Output Circuit 11 11 11 pea een nee nee ns ey Nhe rN ney 12 Choosing a Power Supply 13 Mounting the Drive netted eae Sins 14 Recommended Motors ears 14 Technical Specifications oe nena 15 Mechanical 16 Connector Layout 2 2 gt 16 3 Introduction Thank you for selecting an MOONS motor control We hope our dedication to performance quality and economy will make your motion control project successful there s anything we can do to improve our products or help you use them better please call or fax We d like to hear from you Features gt Two axis step motor driver in one compact package e Drives sizes 11 through 23 step motors e Pulse width modul
4. all Power on green LED See drawing on page 16 for more information Ambient tempera ture range 0 to 70 C European style screw terminal blocks Wire size AWG 16 28 Motor 1 and DC input 6 position VDC VDC A A B B Signal Input 12 position ST1 ST1 DR1 DR1 5V AN2 GND ST2 ST2 DR2 DR2 Motor 2 and Output 6 position A A B B OUT OUT Microstepping 15 software selectable step resolutions With 1 8 motor 200 400 800 1000 1600 2000 3200 5000 6400 10000 12800 20000 25000 25600 50000 Microstep wave form pure sine 12 800 steps rev in run stop mode 15 Mechanical Outline lt 1 50 05 06 2007 Al Connector Layout WOOO 9 SHANGHAI AMP amp MOONS AUTOMATION CO LTD NO 168 MING JIA ROAD SHANGHAI 201107 P R CHINA Tel 86 21 52634688 Fax 86 21 52634098
5. als may be sinking NPN sourcing PNP or differential e Analog speed signal or speed control potentiometer optional connector DC power supply motor 1 mounting hole 1 of 6 power LED connector connector oe step run1 dirt step ri un2 dir2 Always use the blue amp white Applied analog in 1 connector MOONS screwdriver to tighten the analog in2 for programming screw terminal connectors Larger screwdrivers may remove the plastic dimples that prevent the screws from falling out 5 small flat blade screwdriver for tightening the connectors included with drive Connecting the Power Supply you need information about choosing a power supply please read Choosing a Power Supply located on page 13 of this manual your power supply does not have a fuse on the output or some kind of short circuit current limiting feature you need to put a 4 amp fast acting fuse between the drive and power supply Install the fuse on the power supply lead Connect the motor power supply terminal to the driver terminal labeled VDC Connect power supply to the drive terminal labeled VDC Use no smaller than 20 gauge wire Be careful not to reverse the wires Reverse connection will destroy your driver void your warranty and generally wreck your day fuse motor 12 35 VDC l Connecting the Motors Warning When connecting a mo
6. ation 3 state switching amplifiers e Phase current from 0 1 to 2 0 amps set by software Optically isolated differential step run direction inputs 0105 volt analog inputs for speed control e 15 step resolutions 200 50000 steps rev set by software e Automatic idle current reduction set by software Block Diagram each axis 12900 O Lar emer nS aS Sa Optical Isolation PWM i Amplifier X Controller Cee Ree connections to motor connection to PC for programming connections to indexer controller or other devices 4 Getting Started To use your MOONS motor control you will need the following gt 12 35 volt DC power supply for the motor Please read the section entitled Choosing a Power Supply for help in choosing the right power supply a compatible step motor a personal computer running Microsoft Windows 95 98 NT Me 2000 or XP MOONS eXposition software supplied with drive on CD MOONS Mis programming cable you plan to use the drive in Pulse amp Direction Mode gt a source of step pulses Signal may be sinking NPN sourcing PNP or differential gt if your application calls for bidirectional rotation you ll also need a direction signal This signal may also be sourcing sinking or differential For Oscillator Mode gt signal or switch and a direction signal or switch Sign
7. ent through the output terminals must not exceed 20 mA 5V 330 inside MS2035MXD processor Optoisolator NEC PS2501 or equiv Sourcing Output 11 Microstepping Many step motor drives offer a choice between full step and half step resolutions In most full step drives both motor phases are used all the time Half stepping divides each step into two smaller steps by alternating between both phases on and one phase on Microstepping drives like the MS2035MXD precisely control the amount of current in each phase at each step position as a means of electronically subdivid ing the steps even further The MS2035MXD offers a choice of full step half step and 13 microstep resolutions The highest setting divides each full step into 254 microsteps providing 50 000 steps per revolution when using a 1 8 motor In addition to providing precise positioning and smooth motion microstep drives can be used to provide motion in convenient units When the drive is set to 2000 steps rev 1 10 step and used with a 5 pitch lead screw you get 0001 inches step The step resolution is selected using the eXpositon software on your PC Restrictions If an axis is in run stop mode the resolution of that axis is automatically 12 800 Steps rev If one axis is set for full step 200 steps rev or half step 400 steps rev then the other axis must be a
8. l MS2035MXD contains optical isolation circuitry to prevent the electrical noise inherent in switching amplifiers from interfering with your circuits 2508 york Optical isolation is accomplished by powering the motor driver from a different supply thanyour circuits There is no electrical connection between the two signal communication is achieved by infrared light When your circuit turns on or turns off an infrared LED built into the drive it signals a logic state to the phototransistors that are wired to the brains of the drive A schematic diagram of the input circuit is shown at the right Drive Input Circuit 7 Step and Direction Signals Indexer with Sinking Outputs Indexer with Sourcing Outputs Indexer with Differential Outputs Connecting to Indexer with Differential Outputs Many High Speed Indexers have Differential Outputs 8 Run Stop Signals Connecting to the Analog Inputs The analog input of each axis can be used to control the motor speed when that axis Most PLCs don t use 5 volt logic You can connect signal levels as high as 24 is programmed for oscillator mode The speed may also be fixed and the analog volts to the MS2035MXD if you add external dropping resistors to the STEP and DIR input ignored and left unconnected inputs as shown below 5 volt DC is provided for powering potentiometers A 1000 to 10000 ohm potenti For 12 volt logic add
9. lso set for 200 or 400 steps rev Direction signal must be set at least 10 microseconds before activating the run Signal or the move may take place in the wrong direction 12 Choosing Power Supply Voltage Chopper drives work by switching the voltage to the motor terminals on and off while monitoring current to achieve a precise level of phase current To do this efficiently and silently you ll want to have a power supply with a voltage rating at least five times that of the motor Depending on how fast you want to run the motor you may need even more voltage More is better the only upper limit being the maximum voltage rating of the drive itself 35 volts including ripple you choose an unregulated power supply make sure that the no load voltage does not exceed 35 volts DC If the no load voltage is not specified apply power to the supply without connecting the 52035 and measure the voltage Current The maximum supply current you will need is the sum of the two phase currents However you will generally need a lot less than that depending on the motor type voltage speed and load conditions That s because the MS2035MXD uses switching amplifiers converting a high voltage and low current into lower voltage and higher current The more the power supply voltage exceeds the motor voltage the less current you ll need from the power supply We recommend the following selection procedure 1 If you plan to
10. row side mount wide side mount The amplifiers in the drive generate heat To operate the drive for more than a few minutes you must properly mount it on a heat sinking surface MOONS Products can provide a compatible heat sink In most cases securing the drive to the metal enclosure of your system will make an effective heat sink Never use your drive in a space where there is no air flow or where other devices cause the surrounding air to be more than 70 C Never put the drive where it can get wet or where metal particles can get on it 14 Technical Specifications Amplifiers Digital Inputs Analog Inputs Digital Output Physical Connectors Dual bipolar H bridge pulse width modulated three state switch ing at 20 5kHz 12 35 VDC input 0 1 2 0 amps phase output current software selectable 70 watts maximum output power per axis Automatic idle current reduction software selectable reduces current when motor is not moving Step run 1 step run 2 direction 1 direction 2 Differential optically isolated 5V logic 440 ohms internal resistance Motor steps on rising edge of STEP input and or falling edge of STEP 0 5 usec minimum pulse width 2 usec minimum set up time for direction signal 0 to 5 VDC 1K 10K recommended impedance 10 bit ADC Optically isolated photodarlington 30VDC 100 mA maximum Mounted on 1 4 inch thick black anodized aluminum heat transfer chassis 1 5 x 3 0 x 4 0 inches over
11. tor to the driver be sure that the motor power supply is off Secure any unused motor leads so that they can t short out to anything Never disconnect the motor while the drive is powered up Never connect motor leads to ground or to a power supply You must now decide how to connect your motor to the drive 4 A lead An motor Six lead motors can be connected in series or 4 center tap In series mode motors produce more torque at low speeds but cannot run as fast as in the center tap configuration In 4 Leads series operation the motor should be operated at 30 less than rated current to prevent overheating Wiring diagrams for both connection methods are shown on the next page NC means not connected to anything Four lead motors can only be connected one way Please follow the sketch at the right B B 6 Ae 9 6 Leads Series Connected 6 Leads Center Tap Connected Eight lead motors can also be connected in two ways series or parallel As with six lead motors series operation gives you more torque at low speeds and less torque at high speeds In series operation the motor should be operated at 30 less than the rated current to prevent over heating The wiring diagrams for eight lead motors are shown below B B NC B 5 8 Leads Series Connected 8 Leads Parallel Connected Connecting Logic ______ __6____ _ 2202 inside MS2035MXD
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