Make sure to set the max current on the driver board to the motor limit (see below). 4-Motor GCODE controller - Type "G00 X10 Y25" to move the first motor 10 steps, and the second one 25 steps. 4 working properly. g. DMOS Microstepping Driver with Translator and Overcurrent Protection. Ive read somewhere that the correct current limit on 28byj-48 is somewhere between 0. 7amps. It is designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-,. 2 A at 4 V, allowing for a holding torque of 3. VMOT, GND: This is the stepper motor power supply pins. Compatible with Eagle, Altium, Cadence OrCad. Hello, I am using a NEMA 17 stepper motor and A4988 driver according to the following tutorial: Everything seems to work relatively well. Kidlin's Law -If you can write the problem down clearly then the matter is half solved. DMOS Microstepping Driver with Translator and Overcurrent Protection A4988 7 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U. When the current is too high, driver gets hot and steps get lost. Join for free Messages OrdersSorry, we have detected unusual traffic from your network. After installing the SSD1306 library from Adafruit, type “ GFX ” in the search box and install the library. There are two purposes of such capacitor: first it supply power for short peaks in demand, so effectively enabling the 12V power source supply much more current for short time, than it can support over long time and so the driver have more stable power and works generally better. Uno, with four stepper motor drivers A4998 to drive NEMA 17 stepper motors for each of the three axes, was used. pdf is a document that provides detailed information about the Pololu A4988 stepper motor driver carrier, a breakout board for Allegro's A4988 microstepping driver with translator and overcurrent protection. 508. The schematic diagram below shows how the connection for Arduino UNO, A4988 Stepper motor driver and the stepper motor is done. It also has pins M1-M3 to set the microstepping mode. RESET and SLEEP are connected together. 5000; Device Operation. Good morning, Following the scheme that appears in the datashhet of the A4998 I have already made the connections between one arduino uno, the driver a4998 and one stepper motor. If you typed it in correctly and it's still not showing up, or you're not completely sure of the flight number, you should use the Flight. 1" headers. The A4988 is a complete microstepping motor driver with built-in translator for easy operation. 1″-pitch male header pins installed as shown in the main product picture, so no soldering is required to use it with an appropriate 16-pin socket or solderless breadboard. Control steppers via a driver board providing STEP+DIR like the ones from Pololu. Como calibrar el driver A4988 ajustando el Voltaje de referencia Vref de forma correcta para que no pierda pasos, conexión de la CNC Shield a los motores de. It can be a window, door, shutter, cat or dog flap, a. It is designed to operate. The driver features adjustable current limiting, overcurrent protection, and five different microstep resolutions. The A4989 is a dual full-bridge gate driver with integrated microstepping translator suitable for driving a wide range of higher power industrial bipolar 2-phase stepper motors (typically 30 to 500 W). DMOS Microstepping Driver with Translator And Overcurrent Protection A4988 Allegro MicroSystems, LLC 7 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U. 508. The A4988 is a stepper motor driver board that has on a A4988_chip that enables control of stepper motors through arduino type programming firmware and software. Just use the PWM express VI for myRIO to output a pulse. Keep this in mind when planning to power any additional devices off of VCC. 2 V. Quantity: (Order in multiples of 5) backorders allowed. Hope its possible to Drive stepper motor using DAQ (Digitial IO). Logic Input (V) 3 ~ 5. The current rating of the TMC2208 is slightly higher than the A4988 driver, or it’s 1. This is a bulk-packaged version of our A4988 Stepper Motor Driver Carrier that ships without header pins. This stepper motor driver lets you control one bipolar stepper motor at up to approximately 1. It operates from 8 – 35 V and can deliver up to 2 A per coil. The first section of this sketch is the same as in example 1, but the setup and the loop are different. 620-1343-1. Hello, I am experimenting with a stepper motor NEMA23 with the following specifications: Rated current: 2. 08 kg. 62 each. 7 inches (43 mm × 43 mm). The easiest way of interfacing a stepper motor with a microcontroller is via ULN2003 transistor array chip. The document explains how to use the board, how to configure the microstep resolution, how to set the current limit, and how to interface with. Edit this page. I have been trying to follow this tutorial: Besides the NEMA 17, Arduino UNO, and A4998 stepper, I'm also using the following 12V 2A power supply: However, I have been unsuccessful in getting any movement out of the stepper. I can code in C and C++ but I cant find useful library to control those stepper motors. PARTS USED EasyDriver Stepper Driver Amazon usa Amazon canada. The library will be uploaded on my GITHUB channel. No point trying with high-impedance motor, the inductance of the windings is far too. The A4988 is a complete microstepping motor driver with built-in translator for easy operation. The reference voltage is equal to the maximum motor current, multiplied by 8, and then by the current sensing resistance. When set to a logic low, the internal control enables the. TheseALLALLA4988SETTR-T. 00 for 2 item (s) Well, right now a set of five Made in China A4988 stepper driver boards goes for around $6. Step 1: Datasheet. 62 each. In the configuration. Hi I have been working with both the Stepper NEMA 17 - DRIVER A4988 to move some gears and stuff, first everything work perfectly just by connecting everything with my Arduino UNO as I power both my Arduino and my Stepper with two 9V batteries, lately my project stopped working and I'm trying to figure out was wrong so. . TB6600 Stepper Motor Driver with Arduino Tutorial The A4988 driver chip has several safety functions built-in like overcurrent, short circuit, under-voltage lockout, and over-temperature protection. Bước 2: Giải nén file thư viện. 5 (50%). A4988 driver Stepper Motor Driver includes a. A. in. After downloading the Proteus library zip file, unzip it and you will get two files in it. It is designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2 A. Using the driver Minimal wiring diagram for connecting a microcontroller to an A4988 stepper motor driver carrier (full-step mode). 3V V 35V V 4 4. the problem was that I cleaned the cnc which is under tension with a vacuum cleaner when I see a white smoke coming from the pilot A4988 (fig 3 ) the axis y1 I use the. Esse chip não pode controlar motores de passo Unipolares ! A4988 Pinout. 3 volt I will use 5v for the esp32 power supply and 12 volt for the stepper motor supply. These drivers have become. ملاحظة: الفرق بين المنتج “A4988 driver Stepper Motor Driver- جودة عادية” و “A4988 driver Stepper Motor Driver- نوعية جيدة” هو أن الجودة الجيدة A4988 بها عدد أكبر من طبقات PCB وتتميز بمسامير التوصيل المطلية بالذهب بالمقارنة. 5V. This means that we can control the stepper motor with just 2 pins from our controller, or one for controlling the rotation direction and the other for controlling the steps. Designing the Micro_step driver "A4988" for the stepper motors in proteus. So basically, think of the A4988 as a motor driver. Hello friends, I hope you all are doing great. When you send the servo a signal with a pulse width of 1. 5. 6 kg/cm Rotor Inertia: 300 g/cm2. NedMan (Ned Hill) January 2, 2021, 5:24am 1. Product Description. LIB. The problem however seems to be in. From the Windows Start Menu, navigate to the Cadence application folder, then select PCB Editor Utilities > Pad Designer. AA4998 (American Airlines) - Live flight status, scheduled flights, flight arrival and departure times, flight tracks and playback, flight route and airport. Previous. There’re 3 slots in the board for stepper motor drive modules, can drive 3 stepper motors, and each step stepper motor only need two IO port, that is to say, 6 IO ports can quite well to manage three stepper. zip: 2023-04-04: 39. It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without. The A4988 includes a fixed off-time current Como Funciona o Módulo Driver A4988. 9j. El Driver A4988 es pin-compatible. ASCOM driver tested with FocusMax, Nebulosity 4. Harga A4988 Motor Driver Module (Red PCB) Rp11. The A4988 driver Stepper Motor Driver is a complete micro-stepping motor driver with built-in converter, easy to operate. The driver requires a logic supply voltage (3 – 5. I have a similar problem where it turn in one direction. The first, which are the pins closest to the center of the board, are spaced out to fit standard 0. x. I will drive multiple a4988 drivers running nema17 from esp32 using arduino IDE. large (for low voltage operation at any rate). The driver requires a logic supply voltage (3 – 5. Im using the driver A4988 together with stepper 28byj-48. 3- an Arduino UNO board Rev. I have all ready re-assigned the pin outs in the sketch and tried selecting the enable option to "0" and. {"payload":{"allShortcutsEnabled":false,"fileTree":{"Wally340":{"items":[{"name":"ArduinoShield_OpenKnit. 1. The DRV8825 has a larger maximum supply voltage (45 V vs. 853. How to use the A4988-stepperDriver library. Otra ventaja que nos proporciona. It can drive almost any bipolar stepper motor and can deliver up to 2 Amperes of current per coil. . It is designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2 A. Clone the a4988tester Github repository and load A4988tester. I saw that the pin-outs were the same as long as the boards themselves aligned the enable pins on the shield. Please see the A4988 Stepper Motor Driver Carrier product page for more information about the driver. Specifications: Voltage range: 8-35V. This is the Voron Documentation site. It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per coil with sufficient additional cooling). Each pulse represents a step (or micro-step) taken by the stepper. We’re now getting a sound level of around 45 decibels, but it’s still way louder than the TMC2208 drivers. kevin August 5, 2011, 2:08am #2. Each pin present on the board has two connection points. Find more details, circuit schematics and sourc. h> const byte stepPin = 2; const byte dirPin = 5; const byte enablePin = 8; const unsigned int. S. 4. This breakout board for Allegro’s A4988 microstepping bipolar stepper motor driver features adjustable current limiting, over-current and over-temperature protection, and five different microstep resolutions (down to 1/16-step). cpp","path":"src/A4988. It is capable of operating bipolar stepper motors in full step, half step, quarter step, eighth step, and sixteenth step modes. ) It is a chopper microstepping driver based on the Allegro A4988 driver chip. This digital stepper motor has high reliability, low power consumption and high accuracy. If you haven’t tuned your motor current at all, it may happen that the motor doesn’t move correctly and starts pulsating, it will stop as soon as you reduce the current by rotating the pot. The stepper motor is small in size and with a large speed reducer (1: 64) so that very fine control of the rotation angle is possible. , Ltd. This integrated motor driver makes interfacing with a microcontroller super easy as you only need two pins to control both the speed. vanepp October 6, 2022, 9:57pm 2. Each package comes with three drivers with a small heatsink and header pins installed to be used with. 100uF capacitor between GND - VMOT. TEQStone A4988 Stepper Motor Driver with Heat Sink and Plug 5 Pack for 3D Printer, CNC Machine, Laser Engraver and Robotic Arm. 499 only at Robu. 1" male header. Standard Package. The secondary connection points are closest to the edge of the board, and are spaced to fit 2-pin screw. Re: Control Stepper Driver with DAQ and LabVIEW (A4988) 08-17-2016 11:01 PM. The A4988 stepper motor driver carrier comes with one 1×16-pin breakaway 0. The A4988 Driver Module is used to control the speed and direction of stepper motors mainly used in robotics, toys, 3D printers for motion control. This product: A4988 – Stepper Motor Driver - EGP 70. tl smoother. 0 out of 5 stars 1. 4. You can also solder your motor leads and other connections directly to the board. Quantity. MG90S Datasheet. Each phase draws 1. 5. The. 087mm mm 2. Import package. All of the information needed to go from zero to a working Voron printer can be found here. 1" female connectors. 5 A – – 1. 79mm mm Motor Drivers 28 3. 96V and I checked it from the + probe on the turnpot and - on a. 3V and 5V logic supply. It has two voltage regulators (5 V and 3. El driver tiene una capacidad de salida máxima de 45 V y ± 2 A, lo que es ideal para accionar motores paso a paso de tamaño pequeño o mediano, como un motor paso a paso bipolar NEMA 17. Dùng với board CNC Shield v3 cho CNC mini. Bạn sẽ thấy hai tên file là *. The A4988 is a complete microstepping motor driver with a built-in translator for easy operation with minimal. It can be used with various microcontrollers and control boards such as B. The board has a simple step and direction control interface and five different step. The driver features adjustable current limiting, overcurrent and overtemperature protection, and five different microstep resolutions (down to 1/16-step). The motor interface type must be set to 1 when using a step and direction driver. In this section, we will build a project using ESP32 and A4988 stepper motor driver IC. So i bought Nema 17 stepper motor, Arduino Mega and the stepper motor driver a4988. Unzip the download and you’ll have a folder called "grbl-master". The driver i am using is a a4988 Polulu with 2Amps maximum current. Hi What's the best way to save energy at this electronic diagram (A4988 driver/CD4093) on the datasheet, I can see two inputs able to do this : Enable and sleep Enable Input (ENABLE). 5 amp motor I would be looking for a driver than can provide 5 amps. It operates from 8 – 35 V and can deliver up to 2 A per coil. Ive read somewhere that the correct current limit on 28byj-48 is somewhere between 0. nRF24L01 – How It Works, Arduino Interface, Circuits, Codes. However if I feed it with 12 v there is a high frequence noise that wont go away untill I turn my powersupply down to around 9 v. S. It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per. The headers can be soldered in for use with solderless breadboards or 0. 6 out of 5 stars 28. The document explains how to use the board, how to configure the microstep resolution, how to set the current limit, and how to interface with different types of stepper motors. At the heart of the A4988 driver you will find a chip made by Allegro MicroSystems: the A4988 DMOS Microstepping Driver with Translator and Overcurrent Protection. STEP pin is used to control the steps while DIRECTION pin is used to control the. The A4988 stepper driver is for Pololu stepper driver boards and compatible clones. Cheers. Calculating the Vref for the DRV8825 drivers is easy: VREF = current / 2. I already tried to power the logic voltage of 3. 8 Rated Voltage: 2. . 3 VERR = [ (VREF/8) – VSENSE] / (VREF/8). Thermal-shutdown circuit system. The driver features adjustable current limiting, overcurrent protection, and five different microstep resolutions. Html View. It is designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2 A. A stepper motor driver usually accepts a step and direction signal as inputs. Also note that 2 amps is very much the upper limit for an A4988. It operates from 8 – 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air. The A4988 Driver is very cool, as it works with. A driver board/shield with a constant voltage driver, such as the Adafruit Motor Shield. 800×800 76. A4988 Stepper Motor Driver Module for Pololu RepRap 3D Printer StepStick (Pack of 2)Hoje vamos criar um programa capaz de controlar um Motor de Passo utilizando um Arduino e um Driver A4988. (fast, powerfull, silence, dont skip steps, but I have to cool the driver with a fan) I do not understand why EasyDriver is working well, because based on datasheets and forums EasyDriver current capacity is much smaller, what. TMC2209 Driver Upgrades to a Geeetech A10. This breakout board for TI’s DRV8825 microstepping bipolar stepper motor driver features adjustable current limiting, over-current and over-temperature protection, and six microstep resolutions (down to 1/32-step). Rp11. stepper motor driver drv8825. An Arduino controls the stepping sequence. The voltage fed to the Analog pin of ESP8266 can be used as a reference voltage to control the speed of the Stepper Motor. 2 A per coil with sufficient. 6 kg/cm Rotor Inertia: 300 g/cm2 The driver i am using is a a4988 Polulu with 2Amps maximum current. stepper motor driver constant current under load, motor driver powering off losing brake effect. This situation begs for some interesting questions: is it worth getting DRV8825. It is never a good idea to run electronic equipment close to its limit. (So if your motor is 200 full steps per revolution, you would get 3200 steps/rev using the Big Easy Driver. Std Edition. A4988 / Drv8825 – Stepper Motor Driver Expansion Board - EGP 45. O chip A4988 possui duas pontes H com transistores FET DMOS para fazer o controle de motores de passo Bipolares. // Include the AccelStepper library: #include. The motor will run five revolutions back and forth with a speed of 200 steps per second and an acceleration of 50 steps/second 2. 3 V. In this tutorial we will learn how to make wireless communication between two Arduino boards using the nRF24L01 transceiver modules. 3. Onboard current-limiting adjustment potentiometer protects the module and motors. 12. CNC Shield digunakan sebagai papan pengendali driver A4998. Add to wish list. S. DMOS Microstepping Driver with T ranslator. Maximum current per phase: 2 A. This stepper motor driver lets you control one bipolar stepper motor at up to 2 A output current per coil. The control circuits in a stepper motor driver are complex. It is designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2 A. Upgrading my new Geeetech A10 printer to use TMC2209 drivers in place of the A4988 drivers to make the printer quieter. US$ 1. 1. A4988, DRV8825 and generic two-pin stepper motor driver library. If it's not one of those problems, the A4988 chip might have an issue. Configuration Details. It operates from 8 – 35 V and can deliver up to. FREE delivery. TMC drivers. However, the Allegro drivers don't apply DC, they apply a duty-cycle modulated square wave, which limits the overall power delivered to the motor. You can use this diagram as a starting point, though you can just tie STEP and DIR to ground and leave the motor disconnected. Two different combinations of orifice and nozzle were tried to ensure the proper. All this time I observed that the driver got hot quite a lot and that's it. 5 = 0. 7 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U. We’re now getting a sound level of around 45 decibels, but it’s still way louder than the TMC2208 drivers. When combined with an Arduino UNO microcontroller, the. If the correct current flows in the first coil turn everything off and connect the multimeter in the wire for the second coil. 1-0. Looks like it has a stepper motor with a driver on it. By setting appropriate logic levels to those pins we will set the motors to at least one of the five-step resolutions. The Devo model runs at a temperature of 70 degrees. All seems to work with the following code: // Accelerates up to MaxSpeed. The driver features adjustable current limiting, overcurrent and over-temperature protection, and five different micro-step resolutions (down to 1/16-step). It is designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity 35 V and ±2 A. The DRV8825 has a larger maximum supply voltage (45 V vs. So, to set our driver to 1A, we need to set our Vref to 1/2 = 0. Device Control A4988, DRV8825 and generic two-pin stepper motor driver library. A4988 comes with an output drive capacity of up to 35 V and ±2 A and compatible with 3. cpp","contentType":"file"},{"name":"A4988. You could also look into our DRV8825 Stepper Motor Driver Carrier, High Current, which is similar to the A4988 carriers in many ways, but can handle around 1. I have a new project, a simple / small CNC platform, based on the following: 1- Hardware: 1. 90 degrees on. 1. Hoặc dùng điều khiển động cơ bước. It defaults to 16 step microstepping mode. ملاحظة: الفرق بين المنتج “A4988 driver Stepper Motor Driver- جودة عادية” و “A4988 driver Stepper Motor Driver- نوعية جيدة” هو أن الجودة الجيدة A4988 بها عدد أكبر من طبقات PCB وتتميز بمسامير التوصيل المطلية بالذهب بالمقارنة. Excellent, thanks Jim! RossW October 13, 2015, 1:02am #4. See moreThe A4988 stepper motor driver has an output drive capacity of up to 35V and ±2A. 0. 96V. A4988. Each BigEasyDriver (BED) can drive up to about 2A per phase of a bi-polar stepper motor. The Library Manager should open. 4 Overcurrent protection (OCP) is tested at TA = 25°C in a restricted range and guaranteed by characterization. 68/0. Our Black Edition A4988 stepper motor driver carrier is a higher-performance drop-in replacement for the original A4988 stepper motor driver carrier. Link the DIR input pin on the A4988 arduino to a digital output pin (e. In today's tutorial, we are gonna have a look at detailed Introduction to A4988. Functionally, the driver will vary the applied voltage to the stepper to maintain a fixed current (it's not quite that simple, motor inductance is involved, but it's a reasonable simplification). Each segment is set by the M0, M1, M2 pin header in the Arduino CNC Shield V3. The second has the same pinning as the DRV8825. The DM542T has more microstep settings, if you need to move your Stepper Motor very accurate, you can use the DM542T as it has up too 25 thousand microsteps which will result in 100000 Steps per Revolution. 0 to 1. So if you’re looking for a way to make your 3D printer quieter, and it uses these A4988 drivers, then this is a great way to do it without having to spend a fortune. Can be applied in a wide range of applications, suitable for engraving machines and other. The driver features adjustable current limiting, overcurrent protection, and five different microstep resolutions. Microstepping is supported. 3 Kbytes. The A4988 stepper motor driver carrier comes with one 1×16-pin breakaway 0. The A4988 includes a fixed off-time current regulator which has the ability. I was already in possession of two stepper motors a NEMA 17 "103H5210-4240" and a NEMA 23 "103H7123-0140" both engines are from 1A per phase and a minimum of 24v power. 2 V Sink Diode, IF = 1. 1. EGP 115. The A4988 is a complete micro-stepping motor driver with a built-in translator for easy operation. Allegro's A4982 / A4984 / A4985 and A4988 devices are complete microstepping motor drivers with a built-in translator for easy operation and overcurrent protection. Its pinnout is compatible with the StepStick design. I was wondering if it's possible to first, set up a voltage divider. The A4988 stepper driver, originally made by Pololu, will interrupt the current to the motor for a little while if the it gets too hot. 1A, 1B, 2A and 2B are connected to the stepper motor coils. Optional push buttons for manual. Klipper can also use Trinamic drivers in their "standalone mode". The A4988 is a complete microstepping motor driver with built-in translator for easy operation. An A4988 is good for about 1. After replacing the A4988 with TMC2208 and setting the reference voltage to it's correct value (which for my. The DRV8825 would be a more suitable driver for your motor if you need the full torque. Download here. Description. It is designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2 A. 1. The moving components are kept lubricated and desinged to provide very less. The flight number or. I am using the A4988 and will like to know if there is anyway of detecting that the A4988 is driving the stepper motor to the maximum or minimum stop position. 1 Features of A4988. It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per coil with sufficient. Esmacat is a powerful platform that can be used to develop DAQ sensor interfaces and motion control applications with hard real-time constraints. The frame is made of allimunium and it is designed to be very light. zip Driver Chip myFP2_A4998_312 Firmware myFP2_A4998_312 Options TP, OLED/LCD, HPSW, PB, SPD, BT ARDUINO UNO + MOTORSHIELD PCB Arduino Uno Driver Chip Adafruit Motor shield v2 Firmware myFP2_AdafruitMotorShieldV2_312 Options TP, LCD, PB CLOSED LOOP PCB myFP2. 2- three A4988 Stepper drivers. First mounting same precision 1/16 step : The example pictures are for the X axis driver it is the same thing for all the drivers. The A4988 stepper motor driver carrier comes with one 1×16-pin breakaway 0. e. A4988 Stepper Motor Driver Carrier. hello. It is designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2 A. 853. letter C on. 1. True/False will trigger Clockwise and anticlock wise direction movements. Control steppers via a driver board providing STEP+DIR like the ones from Pololu. Hello, I am using a version of an Arduino CNC board that is found here to drive 4 wheels on a small wheeled robot. To make your motors compatible with the motor driver simply take the red wire out of the white connector. Pololu driver boards (8+8 pins): . S. Supported drivers are A4988, DRV8824, DRV8825, DRV8834, DRV8880. 8 degrees per step). 1. Unit price (US$) 5. Description. Overview. These drivers are used to drive NEMA 17 motors on the Mill One. In the circuit diagram, the four input pins (1B, 2B, 3B, 4B) of ULN2003 are connected to. Open the Arduino Serial Window at 57600 baud to see messages from your Arduino, then follow along in the code to understand. 100uF capacitor between GND - VMOT. - 5 cấp điều chỉnh bước: 1; 1/2; 1/4; 1/8 và 1/16 bước.