انتخاب واحد پولی:
فارسی انگلیسی
سبد خرید: (0) مورد
خوش آمدید, کاربر گرامی
پشتیبانی آنلاین
Live Support
شاخه ها
اطلاعيه ها
اطلاعيه هامرا از تغييرات محصول درایور استپر موتور با DRV8825 آگاه كن.
سبد خريد
 
0 مورد
مقایسه محصولات
محصولی برای مقایسه انتخاب نشده است!
ورود به سيستم
آدرس پست الكترونيك:
كلمه عبور:

کلمه عبورتان را فراموش کرده اید؟
هنوز ثبت نام نکرده اید؟
تگ محصولات
تسلست
مقالات
مقالات جدید
تمامی مقالات
تمامی موضوعات
 مقالات متفرقه
RSS مقالات

درایور استپر موتور با DRV8825[ROB-00042]کد کالا : ROB-00042

درایور استپر موتور با DRV8825
قیمت: ناموجود
 
 

Overview

This product is a carrier board or breakout board for TI’s DRV8825 stepper motor driver; we therefore recommend careful reading of the DRV8825 datasheet (1MB pdf) before using this product. This stepper motor driver lets you control one bipolar stepper motor at up to 2.2 A output current per coil (see the Power Dissipation Considerations section below for more information). Here are some of the driver’s key features

  • Simple step and direction control interface
  • Six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step
  • Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates
  • Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
  • 45 V maximum supply voltage
  • Built-in regulator (no external logic voltage supply needed)
  • Can interface directly with 3.3 V and 5 V systems
  • Over-temperature thermal shutdown, over-current shutdown, and under-voltage lockout
  • Short-to-ground and shorted-load protection
  • 4-layer, 2 oz copper PCB for improved heat dissipation
  • Exposed solderable ground pad below the driver IC on the bottom of the PCB
  • Module size, pinout, and interface match those of our A4988 stepper motor driver carriers in most respects (see the bottom of this page for more information)

We also carry a DRV8824 stepper motor driver carrier that can serve as a direct substitute for the DRV8825 carrier when using lower-current stepper motors. The DRV8824 can only deliver up to 0.75 A per coil without a heat sink (1.2 A max with proper cooling), but it has larger current-sense resistors that allow for better microstepping performance than the DRV8825 carrier at low currents. The only way to tell our DRV8824 carrier apart from the DRV8825 carrier is by the markings on the driver IC; if you have a mix of the two, you might consider marking them (there is a blank square on the bottom silkscreen you can use for this

Note that we carry several other stepper motor drivers that can be used as alternatives for this module and drop-in replacements in many applications

  • The DRV8834 carrier works with motor supply voltages as low as 2.5 V, making it suitable for low-voltage applications.
  • The DRV8880 carrier offers dynamically scalable current limiting and “AutoTune”, which automatically selects the decay mode each PWM cycle for optimal current regulation performance based on factors like the motor winding resistance and inductance and the motor’s dynamic speed and load.
  • The Black Edition A4988 stepper motor driver carrier is a higher performance version of our original A4988 carrier.

This product ships with all surface-mount components—including the DRV8825 driver IC—installed as shown in the product picture.

This product ships individually packaged with 0.1″ male header pins included but not soldered in; we also carry a version with male header pins already soldered in. For customers interested in higher volumes at lower unit costs, we offer a bulk-packaged version without header pins and a bulk-packaged version with header pins installed.

Some unipolar stepper motors (e.g. those with six or eight leads) can be controlled by this driver as bipolar stepper motors. For more information, please see the frequently asked questions. Unipolar motors with five leads cannot be used with this driver.

Included hardware

The DRV8825 stepper motor driver carrier ships with one 1×16-pin breakaway 0.1" male header. The headers can be soldered in for use with solderless breadboards or 0.1" female connectors. You can also solder your motor leads and other connections directly to the board. (A version of this board with headers already installed is also available.)

Caution: Installing the header pins so that the silkscreen side is up and the components are down can limit the range of motion of the trimpot used to set the current limit. If you plan on installing the header pins in this orientation, please set the current limit before soldering in the pins.

Using the driver


Minimal wiring diagram for connecting a microcontroller to a DRV8824/DRV8825 stepper motor driver carrier (full-step mode).


Power connections

The driver requires a motor supply voltage of 8.2 – 45 V to be connected across VMOT and GND. This supply should have appropriate decoupling capacitors close to the board, and it should be capable of delivering the expected stepper motor current.

Warning: This carrier board uses low-ESR ceramic capacitors, which makes it susceptible to destructive LC voltage spikes, especially when using power leads longer than a few inches. Under the right conditions, these spikes can exceed the 45 V maximum voltage rating for the DRV8825 and permanently damage the board, even when the motor supply voltage is as low as 12 V. One way to protect the driver from such spikes is to put a large (at least 47 µF) electrolytic capacitor across motor power (VMOT) and ground somewhere close to the board.

Motor connections

Four, six, and eight-wire stepper motors can be driven by the DRV8825 if they are properly connected; a FAQ answer explains the proper wirings in detail.

Warning: Connecting or disconnecting a stepper motor while the driver is powered can destroy the driver. (More generally, rewiring anything while it is powered is asking for trouble.)

Step (and microstep) size

Stepper motors typically have a step size specification (e.g. 1.8° or 200 steps per revolution), which applies to full steps. A microstepping driver such as the DRV8825 allows higher resolutions by allowing intermediate step locations, which are achieved by energizing the coils with intermediate current levels. For instance, driving a motor in quarter-step mode will give the 200-step-per-revolution motor 800 microsteps per revolution by using four different current levels.

The resolution (step size) selector inputs (MODE0, MODE1, and MODE2) enable selection from the six step resolutions according to the table below. All three selector inputs have internal 100kΩ pull-down resistors, so leaving these three microstep selection pins disconnected results in full-step mode. For the microstep modes to function correctly, the current limit must be set low enough (see below) so that current limiting gets engaged. Otherwise, the intermediate current levels will not be correctly maintained, and the motor will skip microsteps.

MODE0MODE1MODE2Microstep Resolution
LowLowLowFull step
HighLowLowHalf step
LowHighLow1/4 step
HighHighLow1/8 step
LowLowHigh1/16 step
HighLowHigh1/32 step
LowHighHigh1/32 step
HighHighHigh1/32 step

Control inputs

Each pulse to the STEP input corresponds to one microstep of the stepper motor in the direction selected by the DIR pin. These inputs are both pulled low by default through internal 100kΩ pull-down resistors. If you just want rotation in a single direction, you can leave DIR disconnected.

The chip has three different inputs for controlling its power states: RESET, SLEEP, and ENBL. For details about these power states, see the datasheet. Please note that the driver pulls the SLEEP pin low through an internal 1MΩ pull-down resistor, and it pulls the RESETand ENBL pins low through internal 100kΩ pull-down resistors. These default RESET and SLEEP states are ones that prevent the driver from operating; both of these pins must be high to enable the driver (they can be connected directly to a logic “high” voltage between 2.2 and 5.25 V, or they can be dynamically controlled via connections to digital outputs of an MCU). The default state of the ENBL pin is to enable the driver, so this pin can be left disconnected.


Schematic of nSLEEP and nFAULT pins on DRV8824/DRV8825/DRV8834 carriers.


The DRV8825 also features a FAULT output that drives low whenever the H-bridge FETs are disabled as the result of over-current protection or thermal shutdown. The carrier board connects this pin to the SLEEP pin through a 10k resistor that acts as a FAULT pull-up whenever SLEEP is externally held high, so no external pull-up is necessary on the FAULTpin. Note that the carrier includes a 1.5k protection resistor in series with the FAULT pin that makes it is safe to connect this pin directly to a logic voltage supply, as might happen if you use this board in a system designed for the pin-compatible A4988 carrier. In such a system, the 10k resistor between SLEEP and FAULT would then act as a pull-up forSLEEP, making the DRV8825 carrier more of a direct replacement for the A4988 in such systems (the A4988 has an internal pull-up on its SLEEP pin). To keep faults from pulling down the SLEEP pin, any external pull-up resistor you add to the SLEEP pin input should not exceed 4.7k.

Current limiting

To achieve high step rates, the motor supply is typically much higher than would be permissible without active current limiting. For instance, a typical stepper motor might have a maximum current rating of 1 A with a 5Ω coil resistance, which would indicate a maximum motor supply of 5 V. Using such a motor with 12 V would allow higher step rates, but the current must actively be limited to under 1 A to prevent damage to the motor.

The DRV8825 supports such active current limiting, and the trimmer potentiometer on the board can be used to set the current limit. You will typically want to set the driver’s current limit to be at or below the current rating of your stepper motor. One way to set the current limit is to put the driver into full-step mode and to measure the current running through a single motor coil without clocking the STEP input. The measured current will be 0.7 times the current limit (since both coils are always on and limited to approximately 70% of the current limit setting in full-step mode).

Another way to set the current limit is to measure the voltage on the “ref” pin and to calculate the resulting current limit (the current sense resistors are 0.100Ω). The ref pin voltage is accessible on a via that is circled on the bottom silkscreen of the circuit board. The current limit relates to the reference voltage as follows:

Current Limit = VREF × 2

So, for example, if you have a stepper motor rated for 1 A, you can set the current limit to 1 A by setting the reference voltage to 0.5 V.

Note: The coil current can be very different from the power supply current, so you should not use the current measured at the power supply to set the current limit. The appropriate place to put your current meter is in series with one of your stepper motor coils.

Power dissipation considerations

The DRV8825 driver IC has a maximum current rating of 2.5 A per coil, but the current sense resistors further limit the maximum current to 2.2 A, and the actual current you can deliver depends on how well you can keep the IC cool. The carrier’s printed circuit board is designed to draw heat out of the IC, but to supply more than approximately 1.5 A per coil, a heat sink or other cooling method is required.

This product can get hot enough to burn you long before the chip overheats. Take care when handling this product and other components connected to it.

Please note that measuring the current draw at the power supply will generally not provide an accurate measure of the coil current.Since the input voltage to the driver can be significantly higher than the coil voltage, the measured current on the power supply can be quite a bit lower than the coil current (the driver and coil basically act like a switching step-down power supply). Also, if the supply voltage is very high compared to what the motor needs to achieve the set current, the duty cycle will be very low, which also leads to significant differences between average and RMS currents. Additionally, please note that the coil current is a function of the set current limit, but it does not necessarily equal the current limit setting. The actual current through each coil changes with each microstep. See the DRV8825 datasheet for more information.

Schematic diagram


Schematic diagram for the DRV8824/DRV8825 stepper motor driver carrier.


The current sense resistors (R2 and R3) on the DRV8825 carrier are 0.100 Ω. This schematic is also available as a downloadable pdf(196k pdf).

Key differences between the DRV8825 and A4988

The DRV8825 carrier was designed to be as similar to our A4988 stepper motor driver carriers as possible, and it can be used as a drop in replacement for the A4988 carrier in many applications because it shares the same size, pinout, and general control interface. There are a few differences between the two modules that should be noted, however:


DRV8825 stepper motor driver carrier.

A4988 stepper motor driver carrier, Black Edition


  • The pin used to supply logic voltage to the A4988 is used as the DRV8825’s FAULT output, since the DRV8825 does not require a logic supply (and the A4988 does not have a fault output). Note that it is safe to connect the FAULT pin directly to a logic supply (there is a 1.5k resistor between the IC output and the pin to protect it), so the DRV8825 module can be used in systems designed for the A4988 that route logic power to this pin.
  • The SLEEP pin on the DRV8825 is not pulled up by default like it is on the A4988, but the carrier board does connect it to the FAULT pin through a 10k resistor. Therefore, systems intended for the A4988 that route logic power to the FAULT pin will effectively have a 10k pull-up on the SLEEP pin. (This 10k resistor is not present on the initial (md20a) version of the DRV8825 carrier.)
  • The current limit potentiometer is in a different location.
  • The relationship between the current limit setting and the reference pin voltage is different.
  • The DRV8825 offers 1/32-step microstepping; the A4988 only goes down to 1/16-step.
  • The mode selection pin inputs corresponding to 1/16-step on the A4988 result in 1/32-step microstepping on the DRV8825. For all other microstepping resolutions, the step selection table is the same for both the DRV8825 and the A4988.
  • The timing requirements for minimum pulse durations on the STEP pin are different for the two drivers. With the DRV8825, the high and low STEP pulses must each be at least 1.9 us; they can be as short as 1 us when using the A4988.
  • The DRV8825 has a higher maximum supply voltage than the A4988 (45 V vs 35 V), which means the DRV8825 can be used more safely at higher voltages and is less susceptible to damage from LC voltage spikes.
  • The DRV8825 can deliver more current than the A4988 without any additional cooling (based on our full-step tests: 1.5 A per coil for the DRV8825 vs 1.2 A per coil for the A4988 Black Edition and 1 A per coil for the original A4988 carrier).
  • The DRV8825 uses a different naming convention for the stepper motor outputs, but they are functionally the same as the corresponding pins on the A4988 carrier, so the same connections to both drivers result in the same stepper motor behavior. On both boards, the first part of the label identifies the coil (so you have coils “A” and “B” on the DRV8825 and coils “1” and “2” on the A4988).
  • For those with color-sensitive applications, note that the DRV8825 carrier is purple.

In summary, the DRV8825 carrier is similar enough to our A4988 carriers that the minimum connection diagram for the A4988 is a valid alternate way to connect the DRV8825 to a microcontroller as well:


Alternative minimal wiring diagram for connecting a microcontroller to a DRV8824/DRV8825 stepper motor driver carrier (full-step mode).


افزودن به لیست مقایسه نظرات بازگشت
این محصولات قبلا توسط مشتریان خریداری شده اند شما قصد خرید ندارید؟
فن هوای حلزونی 12V 0.35A 4.2W مدل Mitsumi Worm Blower TYF350LJ02
فن هوای حلزونی 12V 0.35A 4.2W مدل Mitsumi Worm Blower TYF350LJ02
ماژول درایور PWM / سروو 12 بیتی 16 کاناله PCA9685 دارای ارتباط I2C
ماژول درایور PWM / سروو 12 بیتی 16 کاناله PCA9685 دارای ارتباط I2C
ماژول نمایشگر OLED سفید 0.96 اینچ I2C 128x64
ماژول نمایشگر OLED سفید 0.96 اینچ I2C 128x64
ماژول تاچ خازنی CJMCU-0401
ماژول تاچ خازنی CJMCU-0401
ماژول فرستنده و گیرنده رادیویی +nRF24L01 2.4G با آنتن Trace
ماژول فرستنده و گیرنده رادیویی +nRF24L01 2.4G با آنتن Trace
شیلد پروتوتایپ MEGA2560 همراه برد بورد
شیلد پروتوتایپ MEGA2560 همراه برد بورد
ماژول نمایشگر OLED آبی 0.96اینچ با رابط SPI سایز 128x64
ماژول نمایشگر OLED آبی 0.96اینچ با رابط SPI سایز 128x64
سنسور ضربان قلب پالس اکسیمتر MAX30102
سنسور ضربان قلب پالس اکسیمتر MAX30102
ماژول وای فای سریال ESP-12S دارای هسته وایفای ESP8266
ماژول وای فای سریال ESP-12S دارای هسته وایفای ESP8266
ماژول نمایشگر OLED زرد و آبی 0.96اینچ با رابط SPI سایز 128x64
ماژول نمایشگر OLED زرد و آبی 0.96اینچ با رابط SPI سایز 128x64
شیلد CNC و Q54 پرینتر سه بعدی 3DPrinter  برای آردوینو V3
شیلد CNC و Q54 پرینتر سه بعدی 3DPrinter برای آردوینو V3
سنسور التراسونیک HY-SRF05
سنسور التراسونیک HY-SRF05
آردوینو پرو مینی BAITE با پردازنده ATmega328P-MU
آردوینو پرو مینی BAITE با پردازنده ATmega328P-MU
ماژول وای فای ESP-12E دارای هسته وایفای ESP8266
ماژول وای فای ESP-12E دارای هسته وایفای ESP8266
ماژول نمایشگر OLED زرد و آبی 0.96اینچ با رابط I2C سایز 128x64
ماژول نمایشگر OLED زرد و آبی 0.96اینچ با رابط I2C سایز 128x64
ماژول رله 2 کانال 5 ولت با اپتوکاپلر
ماژول رله 2 کانال 5 ولت با اپتوکاپلر
هت نمایشگر کاراکتری 16x2برای بورد رزبری دارای یک RGB و 5 کلید فشاری با رابط I2C
هت نمایشگر کاراکتری 16x2برای بورد رزبری دارای یک RGB و 5 کلید فشاری با رابط I2C
Arduino Nano - آردوینو نانو v3
Arduino Nano - آردوینو نانو v3
شیلد موتور درایور L293D با قابلیت اتصال برد NodeMCU و کنترل وایفای
شیلد موتور درایور L293D با قابلیت اتصال برد NodeMCU و کنترل وایفای
ماژول رله 8 کانال 5 ولت با اپتوکوپلر
ماژول رله 8 کانال 5 ولت با اپتوکوپلر
ماژول نمایشگر OLED سفید 0.96اینچ با رابط SPI سایز 128x64
ماژول نمایشگر OLED سفید 0.96اینچ با رابط SPI سایز 128x64
پروتوتایپ شیلد توسعه برد آردوینو نانو V3.0
پروتوتایپ شیلد توسعه برد آردوینو نانو V3.0
ماژول فرستنده و گیرنده رادیویی +nRF24L01 با آنتن Trace
ماژول فرستنده و گیرنده رادیویی +nRF24L01 با آنتن Trace
ماژول رله 1 کانال 5 ولت
ماژول رله 1 کانال 5 ولت
مانیتورینگ شارژر USB - نمایشگر ولتاژ و جریان
مانیتورینگ شارژر USB - نمایشگر ولتاژ و جریان
رله حالت جامد G3MB-202P-DC5
رله حالت جامد G3MB-202P-DC5
مبدل مینیاتوری RS232 به TTL با MAX3232
مبدل مینیاتوری RS232 به TTL با MAX3232
ماژول کنترلر سرعت موتور 1803BK - DC
ماژول کنترلر سرعت موتور 1803BK - DC
ترانس جریان ZMCT103C
ترانس جریان ZMCT103C
ماژول استریو PAM8403  آمپلیفایر 3 وات همراه ولوم
ماژول استریو PAM8403 آمپلیفایر 3 وات همراه ولوم
مبدل باتری کتابی 9 ولت به جک آداپتوری 5.5 میلی متر
مبدل باتری کتابی 9 ولت به جک آداپتوری 5.5 میلی متر
ترمینال 2 تایی سیم 0.1-2.5 میلیمتر
ترمینال 2 تایی سیم 0.1-2.5 میلیمتر
ماژول رله 4 کانال 5 ولت 10 آمپر با اپتوکوپلر
ماژول رله 4 کانال 5 ولت 10 آمپر با اپتوکوپلر
درایور استپر موتور 4 آمپر TB6600
درایور استپر موتور 4 آمپر TB6600
ماژول سنسور تاچ خازنی TTP223B
ماژول سنسور تاچ خازنی TTP223B
شیلد موتور درایور L298P آردوینو دارای بازر
شیلد موتور درایور L298P آردوینو دارای بازر
قاب پلکسی گلس برای آردوینو  MEGA2560
قاب پلکسی گلس برای آردوینو MEGA2560
ماژول نمایشگر 1602 کاراکتری آبی 16 پین
ماژول نمایشگر 1602 کاراکتری آبی 16 پین
جوی استیک مینیاتوری 5D
جوی استیک مینیاتوری 5D
ماژول درایور - رابط سریال IIC I2C ال سی دی های ماتریس 2 در 16
ماژول درایور - رابط سریال IIC I2C ال سی دی های ماتریس 2 در 16
Arduino Mega2560 R3
Arduino Mega2560 R3
درایور موتور دوبل  L298N DC
درایور موتور دوبل L298N DC
بورد رسپبری پای 4  Raspberry Pi 4 2G Model B UK ساخت انگلستان
بورد رسپبری پای 4 Raspberry Pi 4 2G Model B UK ساخت انگلستان
پین هدر نری 2.54 میلیمتر 1x40
پین هدر نری 2.54 میلیمتر 1x40
سیم  جامپر 40 تایی Dupont دو سر نری 20 سانت
سیم جامپر 40 تایی Dupont دو سر نری 20 سانت
قفل برقی 12 ولت کابینتی
قفل برقی 12 ولت کابینتی
پتانسیومتر دیجیتال 5 کیلو اهم MCP4131-502E/P
پتانسیومتر دیجیتال 5 کیلو اهم MCP4131-502E/P
مبدل DC-DC کاهنده 4-40 ولت به 1.25-36 ولت 200W 8A XL4016E1
مبدل DC-DC کاهنده 4-40 ولت به 1.25-36 ولت 200W 8A XL4016E1
ماژول WiFi مدل NodeMcu Lua V3 با CP2102
ماژول WiFi مدل NodeMcu Lua V3 با CP2102
فن خنک کننده مخصوص رسپبری پای Raspberry Pi Fan
فن خنک کننده مخصوص رسپبری پای Raspberry Pi Fan
ولت متر سه رقمی دیجیتال 0.36 اینچ DC 0V-30V قرمز
ولت متر سه رقمی دیجیتال 0.36 اینچ DC 0V-30V قرمز
جک سوکت پاور DC پیچی مدل DC-022 مناسب برای قاب دستگاه
جک سوکت پاور DC پیچی مدل DC-022 مناسب برای قاب دستگاه
ابر خازن NessCap 5F, 2.7V
ابر خازن NessCap 5F, 2.7V
فن گرمکن 220 ولت 2200 وات
فن گرمکن 220 ولت 2200 وات
زاویه سنج صنعتی 2 محور 45± درجه RS232 مدل ZCT245J-LAQ-17
زاویه سنج صنعتی 2 محور 45± درجه RS232 مدل ZCT245J-LAQ-17
آی سی زاویه سنج 2 محور SCA100T-D01
آی سی زاویه سنج 2 محور SCA100T-D01
سوییچ BCD با ارقام 0 تا 9
سوییچ BCD با ارقام 0 تا 9
مبدل AC/DC سوییچینگ ایزوله 220 ولت به 5 ولت 3 وات مدل HLK-PM01
مبدل AC/DC سوییچینگ ایزوله 220 ولت به 5 ولت 3 وات مدل HLK-PM01
کپی‌رایت © 2024 ایران ماژول الکترونیک
راه اندازی شده توسط فروشگاه ساز ویرچو