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1. TTT J1 CONNECTOR PIN 1 3 EPNS EPN7E Cie GND P1A P24 STEP EN4BLE PIN 2 PIN A PING PINS PIN 10 VSUPPLY P15 P2B O R VOPTO E ADVANCED MICRO SYSTEMS Page 4 DRV2 USERS GUIDE Se Installation The following installation procedure outlines the minimum steps required to make the DRV2 operational 1 Connect a 12VDC to 40VDC power supply to connector J1 see diagram Pin 1 needs to be connected to Ground and Pin 2 to the positive voltage VSUPPLY See section Power Supply for type and sizing of recommended power supply 2 With the power off connect a motor to pins 3 4 5 and 6 of J1 see diagram Typical motor connection diagrams are shown in the Stepping Motors section of this manual Be sure to insulate all motor leads and unused leads in the case of a 6 lead motor to prevent shorts to ground or to each other 3 Set the desired motor drive current value using the DIP Switches JP1 See Section Setting the Output Current for more information 4 Wire STEP DIRECTION and driver ENABLE signals as well as the positive reference voltage level of the signals VIN to connector J1 See section Control Input of this manual for more details 5 Set the microstep resolution using the DIP switches See Section Microstep Resolution for more information 6 Apply power to the DRV2 DOs DON Ts and Important Notes Do not connect or disconnect the motor when po
2. I O and communications wiring CONNECTING DISCONNECTING MOTORS WHILE POWERED WILL CAUSE DAMAGE THAT IS NOT COVERED BY WARRANTY Contact AMS www stepcontrol com Email support stepcontrol com Phone 603 882 1447 Address 3051 N Hwy 183 Liberty Hill Texas 78642 Revision Date 10 14 2014 ay ADVANCED MICRO SYSTEMS Page 12
3. requirements of the application As a result establishing the correct current is often determined empirically Insufficient current will result in inadequate torque and under utilization of the motor Excessive current can cause high speed torque ripple resulting in stalling or pole slippage over heating of the motor and general inefficiency of the system Current setting procedures are described in the next section Setting The Output Current Connecting a Stepping Motor J1 pins 3 6 1A IB Phase 1 of the Stepping Motor is connected between pin 3 and 4 of J1 2A 2B Phase 2 of the Stepping Motor is connected between pin 5 and 6 of J1 Typical 4 6 and 8 lead motor configurations 4 Wire Parallel 6 Wire Motor A Basic 8 Wire Motor DOs DON Ts and Important Notes Do not connect or disconnect motor wires while power is supplied When using a 6 lead motor be sure to insulate isolate unused wires The physical direction of the motor with respect to the logical direction input will depend on the connection of the motor windings To reverse the direction of the motor with respect to the direction input switch the wires on one phase either phase 1 or phase 2 of the outputs E WWW STEPCONTROL COM Page 7 DRV2 USERS GUIDE DIP Switch JP1 Location The following picture shows the DIP Switch JP1 location on the DRV2 board JP CURRENT 2 RESOLUTION Setting the Output Current JP1 The phase curre
4. Mi DRV2 USERS GUIDE LETERE bh 3 8 el sl LR WWW gt o JO ef LUTTTIOTTTTOITTTUTTTINAG ELITE rP Piratii wf E RSRERER SI off ei edt ear L 21 2940 TT DRV2 USERS GUIDE EEN 3 Medaad UT TG BOR vaca ses viass untentct neces eok E secs nse Saar EEE E EE ENEE EEE EE E SS E EEOSE NEE EEI EEE ESENE ETSEN SS 3 Ee 4 HASAN A OWN erga E AEE AE E E EEE E E E EE ad iaeeted 5 FORE UO ebe 6 Wl elei ee 7 UF Eege 8 Setting Me QUIPUL Cunen JP T eegene EE 8 Microstep Resolution GI EE 9 CONO eet 9 El cmieal Specie 11 6 EE 10 Ree Ee e sasn ee n EN E EE EATEN EE REEN ET E E ee eee ee 10 Umen on Ce MOUNN E 11 LeS LEE 12 PNE A IIR r E A E EEE E EEE A eee 11 GONA AM as aaron etait E tos en AEE EEEe 12 E ADVANCED MICRO SYSTEMS Page 2 DRV2 USERS GUIDE R Overview The DRV2 provides a compact high resolution 2A stepper drive DRV2 Features Single 12V 40V input supply voltage range 0 to 2A phase current adjustable via DIP switches 1 2 1 4 1 8 1 16 1 32 1 64 1 128 1 256 microstep set by DIP switch Electrically isolated and optically coupled STEP DIR amp ENABLE inputs Control input voltage 5 25V Easy wire up using the screw terminal connectors included with the drive Included in the Box DRV2 Drive Mating Connector ee WWW STEPCONTROL COM Page 3 DRV2 USERS GUIDE Pinout The following diagram shows the pins for connecting to the DRV2 board 5 553355 E
5. age and can be calculated by dividing the above wattage by the output supply voltage For example when using a power supply of 24V a current capability of 1 7A will be sufficient 40W 24V 1 66A For lower output phase current this rule scales linearly i e 1A output phase current requires 18 20 Watts DOs DON Ts and Important Notes Individual axes should be independently fused for fault isolation The power supply voltage including ripple and line voltage fluctuations must not exceed the peak rating of 40VDC or be less than 12VDC Do not connect or disconnect motor wires while power is applied Wire size used to connect the power source to the driver should be at least 18 gauge Heavier wire Should be used for longer distances between the power supply and the driver The power supply output current needed is dependent on the supply voltage motor selection and load OO ADVANCED MICRO SYSTEMS Page 6 DRV2 USERS GUIDE ae Stepping Motors The DRV2 is a bipolar chopper driver that works with both bipolar and unipolar motors 1 e 8 4 and 6 lead motors It is also possible to drive half of a 6 lead center tapped motor with the DRV2 however the performance may be compromised To avoid unstable chopping conditions and to provide a higher speed performance ratio a motor with low winding inductance is preferred Drive Current The ideal current for a given motor is based on the specific characteristics of the motor and the
6. e Heat Sink n IESSE LAN o EN ja gs ra WI dh LI DT TTT K A Lat L cere EXXEEETEEI bhihdattiic Di e TT Heatsink and mounting diagram can be supplied by AMS call or email for details E WWW STEPCONTROL COM Page 11 DRV2 USERS GUIDE Design Tips EMI electromagnetic interference or electrical noise can be a major source of problems when integrating power drivers with microprocessor based devices EMI is typically generated through ground loops and AC power line disturbances External devices such as relays coils solenoids arc welders motors drivers and other computer based equipment are also sources of EMI The following design tips will help to prevent EMI from interfering with the system operation e Shield the driver and wiring by mounting it in its own metal enclosure as far away from noise sources as possible e Ground motor shields only at the driver end e Make sure that all power wiring motor AC etc is away from the signal wiring I O communications lines etc e Mechanical grounds should all be tied to Earth at a single point Chassis and motor grounds should be tied to the frame and the frame to Earth e Ground all signal wiring to one point e Use solid state relays or opto isolators whenever possible to isolate remote signals Suppress all mechanical relays with capacitors or MOV s e Use shielded twisted pair cables for the motor
7. nt is set using DIP switches SW1 SW6 Switches SW1 SW3 set the Hold Current and switches SW4 SW6 set the Run Current See below for the settings OFF OFF ON OFF OFF ON ON ON Power down the drive prior to changing current settings The actual motor current will vary based on a number of factors including motor characteristics cable length and shielding The rule of thumb is to set the output current where reliable motion is achieved but without excessive motor heating Current is factory preset to 1 3A ee ADVANCED MICRO SYSTEMS Page 8 DRV2 USERS GUIDE Se DOs DON Ts and Important Notes Apply minimal force when adjusting the switches or risk damaging them Using low power values may cause a slight change in the motor resting position Microstep Resolution JP1 The number of microsteps per full step is selected by the three DIP switches according to the below table Note that the ON position is labeled on the DIP switch SW7 SWS Resolution Value ger Rev Son e 30 on 182 so ON 164 Dam ON 1 128 em ON 1256 am Factory preset to 1 2 stepping ore oN oN oe oe oN oxi ae Control Input The control inputs are wired to J1 To create motor motion at least the STEP and VIN inputs need to be wired and driven Note that since the inputs are electrically isolated from the internal circuitry of the DRV2 the high level voltage of the input signals needs to be pro
8. vided as reference for the optocoupler circuitry Pin Name Description STEP Stepping is triggered on every falling transition of the STEP input Minimum duration of the high and low level is 2us 8 amp 8 DIR Direction signal If unconnected a high level is assumed M keem If left unconnected or supplied with a high level the drive is enabled A low level on this input will disable the drive N I VIN High level of input signals STEP DIR ENABLE This is required as reference for the optocoupler circuitry For the allowable voltage range on the control inputs please see the section Electrical Specifications GE WWW STEPCONTROL COM Page 9 DRV2 USERS GUIDE Electrical Specifications Se ee Run Output Current Phase PEAK 2 0 DIP Selectable Hold Output Current Phase PEAK 0 DIP Switch Selectable Stepping Resolution 2 256 Steps per DIP Switch full step Selectable Input Signals Frequency 500 kHz limited by optocoupler High Input Voltage V DC High Input Current Jo Ja gt Low Input Current For 24V input high level For 5V input high level Low time high time for STEP input eg us A step sequence is triggered with the falling edge of the Step Input Thermal Specifications Operating Temperature 0 to 50 C Storage Temperature 40 to 125 C E ADVANCED MICRO SYSTEMS Page 10 DRV2 USERS GUIDE Dimensions amp Mounting Mounting Plat
9. wer is ON The power supply voltage including ripple and line voltage fluctuations must not exceed 40VDC or be less than 12VDC Make sure the motor to be used is compatible with the drive OO WWW STEPCONTROL COM Page 5 DRV2 USERS GUIDE Power Supply The DRV2 is powered from a single unregulated DC power supply The power supply is connected via pins 1 and 2 of the J1 Connector The input voltage must be in the range of 12VDC to 40VDC High voltage Recommended Power Supply Circuit In general unregulated DC or linear regulated power supplies are best suited for stepper motor applications Switching power supplies which tend to be very cost efficient are also suited for many stepper motor applications however their ability to provide surge currents is limited and may require additional capacitors to be added depending on your application A single power supply can be used for single axis configurations or multiple axes provided component values are scaled accordingly Alternatively individual axes can be supported by individual power supplies If multiple drivers are used with one power supply each drive should have separate power and ground wires that connect directly to the output capacitor of the power supply For 2A of output phase current we recommend a power supply with an output power of 35 40 Watts minimum The required current output capability of the power supply will depend on the output volt

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