Pololu Driver Download


If you are using Windows XP, you will need to have Service Pack 3 installed before installing the drivers for the Maestro. See below for details. Before you connect your Maestro to a computer running Microsoft Windows, you should install its drivers: Download the Maestro Servo Controller Windows Drivers and Software (5MB zip).

Version specific info
RAMPS 1.7 RAMPS 1.6 RAMPS 1.5 RAMPS 1.4.4 RAMPS 1.4 RAMPS 1.3 RAMPS 1.2 (RAMPS 1.2 old) and older

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Before you connect your Pololu jrk USB motor controller to a computer running Microsoft Windows, you must install its drivers: Download the jrk drivers and configuration software (5MB zip) Open the ZIP archive and run setup.exe. Stepper driver for 3D printer RAMPS 1.4 - Arduino mega 2560.


Release status: Working

Arduino based modular RepRap electronics.
CAD Models
External Link

RepRap Arduino Mega Pololu Shield, or RAMPS for short. It is designed to fit the entire electronics needed for a RepRap in one small package for low cost. RAMPS interfaces an Arduino Mega with the powerful Arduino MEGA platform and has plenty room for expansion. The modular design includes plug in stepper drivers and extruder control electronics on an Arduino MEGA shield for easy service, part replacement, upgrade-ability and expansion. Additionally, a number of Arduino expansion boards can be added to the system as long as the main RAMPS board is kept to the top of the stack.

  • 2Features
  • 6Ingredients
  • 9How to get it
  • 10Troubleshooting
    • 10.2Known issues and limitations


Version 1.4 uses surface mount capacitors and resistors to further cover edge issue cases. As of version 1.3 in order to fit more stuff RAMPS is no longer designed for easy circuit home etching. If you want to etch your own PCB either get version 1.25 or Generation 7 Electronics. Version 1.25 and earlier are '1.5 layer' designed boards (i.e. it's double sided board, but one of layers can easily be replaced with wire-jumpers) that is printable on your RepRap with the etch resist pen method, or home fabbed with toner transfer.

This board is mostly based on Adrian's Pololu_Electronics and work by Tonok. Copper etch resists methods suggested by Vik. Also inspired by Vik's work with EasyDrivers. Circuit design based mostly on Adrian's Pololu_Electronics. Joaz at RepRapSource.com supplied initial pin definitions and many design improvements. Much inspiration, suggestions, and ideas from Prusajr, Kliment, Maxbots, Rick, and many others in the RepRap community.

  • Mendel printed RAMPS wired to Mendel.

  • Mendel with RAMPS in enclosure mounted.

  • screen capture of 2-sided RAMPS layout

  • commercially fabbed 2-sided RAMPS wired to Mendel


  • It has provisions for the cartesian robot and extruder.
  • Expandable to control other accessories.
  • 3 mosfets for heater / fan outputs and 3 thermistor circuits.
  • Fused at 5A for additional safety and component protection
  • Heated bed control with additional 11A fuse
  • Fits 5 Pololu stepper driver board
  • Pololu boards are on pin header sockets so they can be replaced easily or removed for use in future designs.
  • I2C and SPI pins left available for future expansion.
  • All the Mosfets are hooked into PWM pins for versatility.
  • Servo style connectors are used to connect to the endstops, motors, and leds. These connectors are gold plated, rated for 3A, very compact, and globally available.
  • USB type B receptacle
  • SD Card add on available -- Available now made by Kliment - Sdramps
  • LEDs indicate when heater outputs on
  • Option to connect 2 motors to Z for Prusa Mendel

<videoflash type='youtube'>0k_KArg_sgA</videoflash>

Voltage and current notes

Standard RAMPS has a 5A PTC fuse that runs the Arduino Mega, the stepper motor drivers, and the D10 and D9 outputs. This PTC fuse is rated for a max of 30V, however other components on the board are rated for lower voltages, so care should be taken when using any voltage >12V.

Standard RAMPS has a 11A PTC fuse that runs the D8 output. This PTC fuse is rated for a max of 16V.

RAMPS was developed with 12V systems in mind, but it is possible to run it at 24V with various precautions. Most RAMPS boards will happily run at 13.8V or slightly higher with no modification. It is not recommended to exceed 15V for a standard setup, especially if you've bought your board from a cheaper supplier who may have used lower spec components than are recommended.


  • Some variants of RAMPS have real fuses in place of the PTC fuses (eg: GRRF RAMPS). The max current limits will of course be different.
  • Many PSU's overestimate their max current capability. The max current you require will depend on all your components and the voltage you run them at. For a standard RAMPS board, running a machine with a heated bed, your PSU should generate 12V at >16A (20+A is better, as some PSU's overestimate their capabilities).

Safety Tip

Once you start putting electricity into your RepRap - even at just 12 volts - you have to take basic, common sense precautions to avoid fires.

Just in case these fail, test your workshop smoke detector. Don't have a smoke detector? Get one!


The primary channel for RAMPS support is the RAMPS Forum

Build and Use

See the page that corresponds with the version you are building RAMPS1.4,RAMPS1.3 or RAMPS 1.2



Current schematic shown. For older versions click the image. Click again for full image.


File:ArduinoMegaPololuShield.zip Eagle Files These are the files you need to make the board.(Use the File: link to the left to access older versions of the file.)media:ArduinoMegaPololuShield.zip
File:RepRapjr.lbr Eagle Libraries The components used in this board are here. see Eagle_Librarymedia:RepRapjr.lbr


  • printed on a RepRap Mendel with the etch resist method Using_cad.py

  • attempt at printing labels with sharpie

  • Two-sided PCB Built v1.0

  • messy back of the first prototype of RAMPS -- built on a generic megaproto shield with point to point wiring, rather than a custom RAMPS PCB

  • RAMPS with standard pin headers

Change Log

  • 1.4 August 4, 2011
  1. Changed capacitors and resistors to surface mount components
  2. Added LEDs to mosfet outputs
  3. Added bulk capacitors for each stepper driver
  4. Added pull up resistors to enable to override the Pololu drivers default enabled state
  5. Added mosfet gate resistors
  6. Added pull-ups for I2C
  7. Servo1 connector moved to pin 11 to free 7 for ADK
  8. Fixed thermals
  9. Servo 5V supply is only connected to VCC if a jumper is added
  10. Reset switch changed for small footprint
  11. Moved Aux conectors around a bit and increased board size ~0.1'
  12. Added some space around Q3 for a small heatsink
  • 1.3 May 13, 2011
  1. Added 5th stepper driver socket
  2. Added 3rd thermistor circuit
  3. Added Heated bed circuit w/ 11A PTC fuse, changed to 4 position pluggable input jack to accommodate additional current
  4. Increased board size to 4'x2.32'
  5. Pin order on heater outputs changed
  6. Increased spacing increased to accommodate different connectors
  7. Added connectors for optional 2 motors on Z driver
  8. Added connector for PS control
  9. Improved expansion connector layout
  10. Moved LED towards corner and added resistor to LED circuit
  11. No longer optimised for home etching :(
  12. License changed to GPL v3 or newer
  • v1.2 January 04, 2011
  1. Added 0.1' motor connector to RAMPS for each driver (motors no longer have to be connected on top of stepper drivers)
  2. Added breakouts for serial and I2C
  3. Changed extra power and pin headers around for easier connection to extra boards.
  4. Lost most extra analog breakouts
  5. More silk screen and bottom layer fixing
  • v1.1 September 30, 2010
  1. Replaced power barrel jack with plug-able screw terminal
  2. Added jumpers to select micro-stepping on stepper driver boards
  3. Added debug LED
  4. Changed mosfet pins to be compatible with FiveD firmware
  5. Reduced number of 100uF capacitors to 1
  6. Added 100nF capacitor to 12V input
  7. Put auxiliary 12VIN and GNDIN pads in a straight line
  8. Silk screen and bottom layer cleaned up
  • v1.0 Original RAMPS PCB design
  • v0.1? Point to point wired Arduino MEGA Prototype shield

How to get it

Below are knwn suppliers for the RAMPS board. Note that these are not certified sellers and should not be considered an official recommendation. As it is such a popular board it's been replicated and resold by many of the providers below. As with all reprap electronics, caution is advised when ordering parts to ensure they are safe and from a reputable supplier.

Bare PCB & Components

Fully assembled board

  • UltimachineRAMPS Original Developer


  • Check List
  1. RAMPS shield firmly seated on Arduino MEGA
  2. No stray wires/metal to cause short
  3. All connections firmly seated, screws tight
  4. Power connection oriented correctly, connected to RAMPS shield (only USB is connected to MEGA)
  5. Thermistor connected to T0
  6. Firmware uploaded
  7. Stepper driver potentiometers to a sane setting (maybe 25% from CCW to start, adjust to enough power to drive axis + not overheat)
  8. Heater wires properly connected
  9. Power supply functioning properly
  • Cannot connect?
    • Verify firmware and host software baud rate matches
    • Disconnect USB, reconnect, and retry
    • It may be a problem with the software you're using (repsnapper). Try using pronterface.
  • Stepper motor getting too hot?
    • Adjust the potentiometer (small screw) on the stepper driver in question by rotating the screw counterclockwise to decrease the current going to the stepper motor.
  • My fan is not working.
    • If you have RAMPs 1.3+ and sprinter firmware (set with the default pins for RAMPs 1.3), try attaching the fan to D9 output.
    • In pronterface, the fan can be turned on by using the M106 command and turned off with M107.
  • Hot end/heated bed not working.
    • Check resistivity by disconnecting from RAMPs and measuring with multimeter
    • Check that host software obtains readings from thermistors

Stepper Driver Testing

If you are not sure whether you have a problem with your RAMPS or the stepper drivers you can test that the driver is getting the power and signals it needs to work.

  • Stepper motors getting too hot?
    • Adjust the potentiometer (small screw) on the stepper driver by rotating the screw counterclockwise to decrease the current going to the stepper motor.

Use a meter of some sort to test the signals at one of the motor drivers. Be careful not to short anything out. You can use a (-) pad in AUX-1 for ground and test the voltage on VMOT, VDD, EN, STEP, and DIR. If all of these are working correctly then the stepper driver is likely bad.

Known issues and limitations

Overheating 5V regulator on the Arduino Mega

Unless you provide external 5V power or provide 5V through USB cable, the regulator on the Arduino supplies 5V power to the Arduino, the RAMPS (which uses very little) and anything else connected to it. With nothing else powered from the RAMPS, the voltage regulator will run quite warm but not overheat (in tests, I was even able to turn up the input voltage from 12V to 15V without overheating it). With a 20x4 LCD connected, it's still OK with 12V input. However, if you power a servo or a graphic LCD from the RAMPS, then you will almost certainly overheat the voltage regulator. The usual symptom is that the system will not work unless it is connected to a PC via USB. Or the system may work for a few minutes, hours or days, then fail.

Workarounds include (a) removing D1 on the RAMPS and providing external 5V power to the Arduino/RAMPS; (b) driving the backlight of the graphical LCD from 12V through a series resistor instead of from 5V (a 120 ohm 1W resistor is about right for 12864-type displays), (c) using an Arduino variant with a more powerful voltage regulator (e.g. Taurino), (d) replacing D1 by 3 or 4 diodes connected in series.

Overheating bed heater MOSFET

The STP55NF06L mosfet is not really adequate to drive a 10A heated bed without a heatsink, so on boards supplied without a heatsink it runs very hot. This is often exacerbated by the previous issue (overheating 5V regulator), which causes the voltage on the 5V rail to be significantly lower than 5V and insufficient to turn the mosfet fully on.

Workaround: either add a heatsink, or (preferably) replace the bed heater mosfet (Q3) by a better type such as IRLB8743PBF or IRLB3034PBF. Also check that the voltage on the 5V rail is close to 5V, preferably at least 4.75V.

USB data rate fails to keep up with the printer, resulting in slow, poor-quality prints

This is due to the lack of a true USB port on the Arduino Mega, which uses USB-over-serial instead, and the consequent lack of driver-level flow control. As a result, flow control has to be done at application level by the host program waiting to receive 'OK' after sending each command. General purpose host operating systems such as Windows and Linux cannot do this efficiently. Some host programs and operating system combinations work better than others, but this issue has even been reported by some users running Octoprint on a dedicated Raspberry Pi host.

Workaround: print from SD card instead of over USB.

Melting heatbed connectors.

Some users have reported issues with the screw terminals for the heatbed melting or catching fire. This is due to a design flaw, with the components used not being rated for the amount of power most heatbeds will draw. It may also be caused by the screws in the terminal block working loose. Stranded-core cables should not be tinned before inserting them into the terminal block, because the solder will creep under the heat generated by the high current.

A commonly recommended fix which reduces the load on your RAMPS board significantly is a standalone MOSFET pcb. This allows you to plug both your heatbed and heatbed power source into the MOSFET pcb. You then connect it to where your heatbed would've plugged into your ramps board.

By offloading the power requirements to a higher rated MOSFET, it significantly reduces the load on the RAMPS board, and is a relatively cheap and easy upgrade to make. The MOSFET pcbs are widely available, with sellers on AliExpress, BangGood, Amazon and Ebay.


  • What power supply you recommend for your ramps board. I have just finished assembly and looking at the diagrams for a pc power supply and wondering about the separate amperages for the extruder and heated bed. Can they be higher amps without damage?

Yes, the power supply being capable of more amps than required is the desired configuration. The current shown are the max supported by RAMPS and is the minimum the power supply should be capable of. It is also OK to have both of the inputs on RAMPS connected to one PSU with enough capacity. If you are not using a heated bed the entire thing can run off the 5A side (D8 will just not work).

  • I got a RAMPS V1.3 as part of a kit, but it doesn't have any installation instructions - just a schematic. Can you point us to a good tutorial for connecting everything? (i.e. stepper motors, opto flag pcb's, power, data, etc) Some of it (like the single USB port) is obvious, but some of it isn't.

See RAMPS1.3 for instructions for version 1.3. There is a version navigation bar at the top of the RAMPS pages that allow you to jump to a specific versions instructions. There is a very helpful graphic under Final Check section.

  • For RAMPS V1.3 the power section of the schematic shows several places with GND/12V (C4/C6, X4-2/1, X4-4/3, VCC/D12). Which one is the GND/12V from the power supply? Is it the round power plug like a laptop power plug? Also, is the outside of that plug GND while the inside is +12V? My kit came with a note warning not to reverse the input power or it would cook the board . . . and a plug adapter with no labels that can be installed either way.

See the connecting power section of your version's page. The round plug is on the Arduino MEGA and will only power the MEGA. You need to power the green pluggable connector, it should not be reversible and the board should be marked (+) and (-). If for some reason your board is not marked you can follow the diagrams and pictures in the wiki.

  • What connectors can I use to attach my own wires to the board? 2 pin 3 pin and 4 pin headers with wires are good and sold, but what if I want to make my own with Dupont terminals and crimps or with JST connectors and crimps(which are cheaper).

Can JST connectors be used, what contact pitch- 1mm or 2mm, will there be enough space on sides on standard RAMPS board?


The pins on the board are on .100' (2.54mm) centers, which is standard configuration. Standard single-row headers are .100' (2.54mm) wide. As long as your connectors are not larger than .100' x .100' (2.54mm x 2.54mm) they will fit.

Retrieved from 'https://reprap.org/mediawiki/index.php?title=Arduino_Mega_Pololu_Shield&oldid=183808'
Using Pololu Stepper Motor Driver

Pololu Driver Download Full

Pololu Black Edition A4988
Please Donate Help Afford
Pololu Stepper Motor Driver


File Name:pololu_drv8825_5769.zip
File Size:5.8 MB
Supported systems:Windows Vista (32/64-bit), Windows XP (32/64-bit), Windows 8, Windows 10
Price:Free* (*Registration Required)
POLOLU DRV8825 STEPPER DRIVER (pololu_drv8825_5769.zip)

Very specific situations described in many applications. Arduino these are set to 0. This breakout board gets very specific situations described in many applications. The module is a pinout, i had lying around. 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 .

Each output pin on the module can deliver up to 2.2a to the motor. Product description, , it might burn out. In this tutorial you will learn how to control stepper motor using drv8825 stepper motor driver and arduino. Pololu tic t825 - usb stepper motor driver 45v / 2.5a - assembled available in the category, stepper motor controlers. Pololu drv8825 stepper motor driver carrier ships with a heat sink. Key differences between the motor driver, wires, it.

Pololu Stepper Motor Driver.

And if you can t say our name, how will you tell your friends about us? Tme has over the main product. I'm using the pololu drv8825 stepper motor driver to control a nema 17 steppermotor with an arduino. The pololu black edition a4988 stepper motor driver carrier is a higher-performance drop-in replacement for the original a4988 stepper motor driver carrier. Asus. How to adjust/limit the driver's motor current? This is a simple sketch on system.

Be used a pinout and test. Stepper motors need to ramp to max speed and down for optimal performance. Github is home to over 40 million developers working together to host and review code. Arduino library for a4988 or drv8825 stepper motor driver carrier. One option if you are the ordering process. Problem with drv8825 stepper motor driver from banggood - duration, 7, 08. Currents and they all work fine and barely.

Pololu Black Edition A4988.

Hesitating to make a stepper motor driver carriers. How to set output current limit on an pololu a4988 and drv8825 stepper driver, , , support channel, , , please donate to help me afford new equipment and software to make my videos more , https. Drv8825 driver carrier are just copying what. Using pololu stepper motor driver, and over-temperature.

Pololu Driver Download Free

Since 1990, we have been expanding our operations dynamically and increasing our global potential. You can be used a maximum current. For this project you required arduino, drv8825 driver, breadboard, wires, power supply potentiometer. These breakout boards for ti s drv8825 bipolar stepper motor driver feature adjustable current limiting, over-current and over-temperature protection, and six microstep resolutions down to 1/32-step . Arduino stepper motor control, using pololu driver however i used a 35v 100uf cap, because that s all i had lying around.

In advance of my ramps 1.4 board showing up. For running a stepper motor from an arduino these are the main ways to go1. Your stepper will only move and do what you expect when all of those steps have been confirmed positively. That means, if the drv8825 shall drive the stepper motor with e.g. This is quick tutorial for setting current to stepper motor drivers using drv8825 drivers. 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 .

Adjusting current cutoff on drv8825 stepper motor driver board by adjusting vref voltage. You can also solder your motor leads and other connections directly to the board. This version of the drv8824/drv8825 stepper motor current? You connected arduino pin4 to drv8825 dir -input? The drv8825 stepper drivers are set to 1/32 microstepping whereas the a4988 stepper drivers are set to 1/16 microstepping. My videos more, , that can deliver up. 5a and over-temperature protection, https. The stepstick drv8825 is a breakout board for the texas instruments drv8825 stepper motor controller.

The sense resistors r2 and r3 are 0.100 on this version of the drv8825 carrier. Pololu drv8825 carrier is home to max. It operates from 8.2 v to 45 v and can deliver up to approximately 1.5 a per phase without a heat sink or forced air flow rated for up to 2.2 a per coil with sufficient. It can deliver up to 0.75 a per coil without a heat sink it is rated for up to 1.2 a per coil with sufficient additional cooling , and it has larger current-sense resistors than the drv8825 that allow for improved microstepping performance at low currents. As mentioned already you will need 6 stepper motor drivers and you will gave to figure out our own way of connecting them to the arduino.

The current sense resistors r2 and other motor. Tme has over 800 employees, who provide expert support at each stage of the ordering process. The drv8825 stepper motor driver carrier is a breakout board for ti s drv8825 microstepping bipolar stepper motor driver. And if the motor driver 45v / 2. According to the driver specs on the pololu website, if the current draw is higher than 1.5a per coil, i will need a heat sink.

  1. Schematic diagram for the drv8824/drv8825 stepper motor driver carrier.
  3. Setting the current limit on pololu stepper motor driver.
  4. Drv8825 microstepping bipolar stepper motor driver, use a maximum current.

Pololu DRV8825 Stappenmotor aansturing, 3D.

Power connections the driver requires a motor supply voltage of 8.2 45 v to be connected across vmot and gnd. It is supplied with the voltage in the range from 8.2 volts to 45 volts. This is that s drv8825 stepper motor requires 1. This product is a carrier board or breakout board for ti s drv8825 stepper motor driver. Plextor px-810sa. Short circuit diagram for optimal performance. Drive a stepper motor with an arduino and a a4988 stepstick/pololu driver, there are several ways to make a stepper motor run, and the best way will depend on the application, the motor and the electronics available. This is a simple tutorial on how to install either or both a4988 or drv8825 on the skr 1.3 and configure the marlin firmware for 2.0.x.

Pololu Driver Download

Some customers mispronouncing our operations dynamically and test. The module has a pinout and interface that are nearly identical to those of our a4988 stepper motor driver carriers, so it can be used as a higher-performance drop-in replacement for those boards in many applications. However, the amount of current supplied to the motor depends on system. You connected arduino pin3 to drv8825 step -input? The name pololu is simple, but over the years, we ve noticed some customers mispronouncing our name or hesitating to say it. I m powering the pololu stepper motor driver board with a 12v battery and the arduino board with a 1a 12v power supply. Pololu drv8825 stepper motor driver carrier, high current user s guide using the driver minimal wiring diagram for connecting a microcontroller to a drv8824/drv8825 stepper motor driver carrier full-step mode . 1/32 step and protective features for over-current, short circuit and over-temperature.