[ Log In ]
[ Register ]

Question #: 14692

Question: How can I connect the Pokeys57CNC controller to a DRV8825 / A4988 expansion board?

Current Solution

The DRV8825 driver IC by TI (Texas Instruments) has two main connections called STEP and DIR. These are the two main connections that you need to use to connect to the Pokeys57CNC controller. You also need to connect the positive digital voltage pin (5V) from the Pokeys57CNC controller's motor connector to both the reset and sleep pins. The GND pin from the Pokeys57CNC motor connector is connected to the GND pin of the DRV8825 driver. The enable pin of the DRV88525 can remain unconnected.

There is a trimmer potentiometer on the DRV8825 that can increase or decrease the amperage setting for the motor. Depending on the DRV8825 board you purchased, there may be two pads to determine the amp setting while turning the trimmer (in the voltage setting on your multimeter).

The A1 and A2 is connected to one of the motor's coils and B1 and B2 is connected to the other motor's coil. There is a pin on the DRV8825 called VMOT that you will connect to the power supply (max 45VDC) and the GND pin next to the VMOT is the V- for the same power supply.

I hope this helps. If not, please add additional information on this thread.

Additional Information:
I followed (to the best of my ability) the instructions provided to my original question, but I did not receive successful results. When I followed the instructions and connected the ground pin from the Pokeys57CNC motor connector to the DRV8825 / A4988 expansion board, it stops the communication between the Pokeys57CNC board & the motors 1-3 that I had working previously. The DRV8825 / A4988 expansion board will be the fourth driver I am connecting to the Pokeys57CNC. The previous three drivers are PoStep-60's if that helps understand the issue.

Prior to hooking up the ground pin (I used pin 10 from the Pokeys57CNC motor connector) to the DRV8825 / A4988 expansion boards ground pin, I was able to see the power being applied via the red LED being illuminated on the DRV8825 board; after this new configuration the light is not turning on.

With the new recommended setup, I used a heat shrink solder piece to add the shunt for the connection to the sleep pin. The connection to the sleep pin is where I believe my issues are stemming from. I must be connecting it to the incorrect pin (within the 9 pin layout on the DRV8825 / A4988 expansion board). Do you have any reference to the 9 pin pinout on the A4988 expansion board? I double checked the pinout provided on the Texas Instruments page, but it only gives clarity to the pinouts on the DRV8825 board itself. After reviewing their documentation, I tried connecting the 5v (pin 9 from the Pokeys57CNC motor connection that's split to connect with the reset pin on the DRV8825 / A4988) wire directly to the terminal on the DRV8825 board and that didn't work either.

Any help or clarification you can provide would be greatly appreciated!

Respond:

Other Possible Solutions to this Question

  • My stepper motors are randomly and frequently stalling while using the Pokeys57CNC controller board, any idea what could be the issue?

    I would suspect that the velocity and/or acceleration is too high for the amp setting on the driver. Consider increasing the current amp setting on the driver is the motor can handle the current, or decrease the velocity and/or acceleration.

    You might also want to check to see if you have any mechanical binding on the machine. To check, remove the mechanical drive mechanism so the axis slides freely and slide it from end to end to feel if you have any tight areas or binding.

    Click the link to respond:
    My stepper motors are randomly and frequently stalling while using the Pokeys57CNC controller board, any idea what could be the issue?

  • How can I connect an inductive proximity sensor to the Mach3 USB controller?

    I would suggest using the NPN proximity sensor for the Mach3 USB or the Pokeys57cnc. The proximity sensors have a top DC voltage limit of 30 volts, so it would be best to use the 24V power supply that is used to power the controller. Both controllers have a 24V power requirement, so that is convenient.

    The blue wire of the proximity sensor is the GND wire and is connected to the 24V power supply's V- terminal. The brown wire is the positive wire and is connected to the V+ terminal of the 24V power supply. The black wire is the signal wire and is connected to the input terminal of the controller.

    Click the link to respond:
    How can I connect an inductive proximity sensor to the Mach3 USB controller?

  • My pokeys57cnc board is showing the Probe active all the time. I have removed all connections to the probe inputs on the board including the grounds and it still shows active.

    Which input on the board are you using?

    Additional Information:
    I'm having the same problem, and the net is offering no answers. It was working fine, then quit. I'm guessing some kind of update broke it

    Additional Information:
    I'm having the same problem, and the net is offering no answers. It was working fine, then quit. I'm guessing some kind of update broke it

    Click the link to respond:
    My pokeys57cnc board is showing the Probe active all the time. I have removed all connections to the probe inputs on the board including the grounds and it still shows active.

  • how to connect USB controller to the drivers. Any instructions/video other then html datasheet?
  • Do you have a diagram on how to connect the vfd so the CNC controller box can turn the spindle on and off whenever i start a job?

    The following videos are helpful when connecting the VFD to a pokeys57CNC controller; however, there is useful information on the external terminals of the VFD and how to connect the VFD to any controller using a relay. Additionally, the videos have useful information on how to program the VFD.

    Start and stop for spindle
    https://youtu.be/0SLFuM4tzuU

    Speed control:
    https://youtu.be/pA69t1ZLY2s

    The following video uses the Mach3 usb controller to control a spindle.

    Click the link to respond:
    Do you have a diagram on how to connect the vfd so the CNC controller box can turn the spindle on and off whenever i start a job?

  • Using the PoKeys57CNC how to you connect two motors to the Y axis and how is Mach 4 configured for this?

    Polabs prepared step by step user guide for PoKeys57CNC and Mach4 to try answering such questions. It is available in our downloads section: https://www.poscope.com/wp-content/uploads/downloads/Pokeys/LibrariesAndPlugins/Mach4 and PoKeys57CNC - step by step guide.pdf

    Click the link to respond:
    Using the PoKeys57CNC how to you connect two motors to the Y axis and how is Mach 4 configured for this?

  • hey, where can i see the steps how can i control 3 or 4 step motor? can i use the Axis Electronics Combo? or i need to connect controller?

    Controlling a 3-axis or 4-axis motor configuration, you will need the following items drivers/motors/controller. Our electronics combo comes with the items mentioned and with power supply/miscellaneous items.
    The only other item needed will be a computer (with controller software) to communicate and view controls of your motors.
    Using the Parallel breakout board will use Mach 3 software, and USB will use Planet-CNC software.

    Additional Information:
    You can use this link to see the videos on how to connect the electronics together and make them work: https://www.buildyourcnc.com/tutorials/tutorial-Electronics-USB-Interface-Wiring

    Click the link to respond:
    hey, where can i see the steps how can i control 3 or 4 step motor? can i use the Axis Electronics Combo? or i need to connect controller?

  • How should I connect the limit switches to my laser controller?

    If you are using the AWC708 or equivalent laser controller, the limit switches will connect between the EL input terminal and the GND terminal in normally open (NO) connection. Most limit switches can be connected as NO, or normally closed (NC).

    For instance, a limit switch for the X- limit will be connected from the ELX- terminal to the NO connection of the limit switch, then a connection from the GND terminal on the laser controller to the COM connection to the same limit switch.

    Click the link to respond:
    How should I connect the limit switches to my laser controller?

  • I have a "Based on planet-cnc's diy cnc usb controller", how I can connect a signal to turn on a mist?

    If you need to control mist, coolant or spindle using the USB Planet-cnc controller, you will need to connect that specific output terminal to an SSR (Solid State Relay). The solid state relay will act as a switch when the output signal is engaged.

    Additional Information:

    I did it, I activated the output signal in the planetcnc software but at the output there is no voltage

    Click the link to respond:
    I have a "Based on planet-cnc's diy cnc usb controller", how I can connect a signal to turn on a mist?

  • How are limit switches connected to the AWC708 controller?

    If you are using the AWC708 or equivalent laser controller, the limit switches will connect between the EL input terminal and the GND terminal in normally open (NO) connection. Most limit switches can be connected as NO, or normally closed (NC).

    For instance, a limit switch for the X- limit will be connected from the ELX- terminal to the NO connection of the limit switch, then a connection from the GND terminal on the laser controller to the COM connection to the same limit switch.

    Click the link to respond:
    How are limit switches connected to the AWC708 controller?

  • does the pokeys57cnc controller support slaving an axis?

    All controllers actually support slaving as long as there are enough step and direction connections on the controller to allow for either the A, B, or C axis to be used. The feature is set up in Mach3 or Mach4. Under the config menu, you can select the Slave Axis selection and specify the A, B, or C axis as the slave. The A axis is motor connection 4, B is 5 and C is 6. Make sure to set the steps per unit the same as the main axis since Mach will not do this automatically.

    Click the link to respond:
    does the pokeys57cnc controller support slaving an axis?

  • I recently purchased 3 axis electronics with the USB controller board. I'm trying to install an E-stop switch. Where do I connect that on the controller board?

    There are many ways to wire an emergency stop switch. The simplest, and arguably the most certain, way is to wire the switch into the incoming power so that throwing the switch kills all power to every part of the machine. Here is a diagram showing how a customer wired such a switch on their blackTooth laser which you could adapt to your needs. http://www.buildyourtools.com/phpBB3/viewtopic.php?f=12&t=4872

    Alternatively, you could use an input pin on your USB board. The wiring would depend on whether and how you might be using limit switches (single or multiple switches; normally open or normally closed). Our website datasheet for the USB board is at https://buildyourcnc.com/item/electronicsAndMotors-electronic-component-USB-Controller-Breakout#prettyPhoto/2/ and shows how to configure the switches for each set up. If you use this method, you'd essentially wire the e-stop as a limit switch.

    Click the link to respond:
    I recently purchased 3 axis electronics with the USB controller board. I'm trying to install an E-stop switch. Where do I connect that on the controller board?

  • I recently purchased 3 axis electronics with the USB controller board. I'm trying to install an E-stop switch. Where do I connect that on the controller board?

    There are many ways to wire an emergency stop switch. The simplest, and arguably the most certain, way is to wire the switch into the incoming power so that throwing the switch kills all power to every part of the machine. Here is a diagram showing how a customer wired such a switch on their blackTooth laser which you could adapt to your needs. http://www.buildyourtools.com/phpBB3/viewtopic.php?f=12&t=4872

    Alternatively, you could use an input pin on your USB board. The wiring would depend on whether and how you might be using limit switches (single or multiple switches; normally open or normally closed). Our website datasheet for the USB board is at https://buildyourcnc.com/item/electronicsAndMotors-electronic-component-USB-Controller-Breakout#prettyPhoto/2/ and shows how to configure the switches for each set up. If you use this method, you'd essentially wire the e-stop as a limit switch.

    Click the link to respond:
    I recently purchased 3 axis electronics with the USB controller board. I'm trying to install an E-stop switch. Where do I connect that on the controller board?

  • I'm connecting my PCI-e parallel expansion card to my 5 axis parallel port breakout board. However, the 3.3 volts coming out is not triggering servo step. I can measure hi/lo coming out of the parallel port when using Mach 3. Is the low voltage likely the issue or should I look elsewhere?

    In the mach 3 software there is a setting that can be check to allow either a high or low to trigger you motor. In Mach 3 Config/Ports&Pins/MotorOutputs/StepLowA will enable the motor with a low Voltage.

    Adjust the motor outputs to there corresponding step pin/direction pin(if setup is following our diagram):
    Step Dirt
    x 2 3
    y 4 5
    z 6 7

    Additional Information:

    Click the link to respond:
    I'm connecting my PCI-e parallel expansion card to my 5 axis parallel port breakout board. However, the 3.3 volts coming out is not triggering servo step. I can measure hi/lo coming out of the parallel port when using Mach 3. Is the low voltage likely the issue or should I look elsewhere?

  • I purchased the 3 Axis Heavy Gantry Electronics /w Pokeys57CNC controller and the motors supplied only have 4 wires coming out of them (R,G,B,Blk). Your wiring video shows wiring 8 cables. do you have a video showing how to wire the 4 wire version?
  • I have a planetcnc USB controller to run my project and when I start the 240v router the USB connection shuts down.

    The USB controller will only work with the Planet-CNC software. This software is well made and will provide great functionality. The planet-cnc software delivers instructions to the microcontroller on the board and the microcontroller will send out the pulse trains needed to move the machine correctly.

    There are two main alternatives if you want to use the mach3 software:
    First, get a parallel port card and add it to your computer and get a parallel breakout board. If you have a laptop/notebook computer, this will not be possible.
    Second, if you have a laptop, or really want to use the USB as the main interface for controlling the machine, you will need to get the smoothstepper board which works with mach3. The price combination is much higher than the USB controller with planet-cnc, but will work with Mach3.

    Additional Information:


    Additional Information:


    Additional Information:
    The planet cnc controller can be prone to electrical interference and has been known to cause such problems. In the first instance try to use a quality double sheilded USB cable, hopefully this will fix your problem. Alternatively you may need to sheild your limit switch, estop and or motor cabling. My pick is that a quality USB cable will fix it though, worked for me.

    Click the link to respond:
    I have a planetcnc USB controller to run my project and when I start the 240v router the USB connection shuts down.

  • I have a planetcnc USB controller to run my project and when I start the 240v router the USB connection shuts down.

    The USB controller will only work with the Planet-CNC software. This software is well made and will provide great functionality. The planet-cnc software delivers instructions to the microcontroller on the board and the microcontroller will send out the pulse trains needed to move the machine correctly.

    There are two main alternatives if you want to use the mach3 software:
    First, get a parallel port card and add it to your computer and get a parallel breakout board. If you have a laptop/notebook computer, this will not be possible.
    Second, if you have a laptop, or really want to use the USB as the main interface for controlling the machine, you will need to get the smoothstepper board which works with mach3. The price combination is much higher than the USB controller with planet-cnc, but will work with Mach3.

    Additional Information:


    Additional Information:


    Additional Information:
    The planet cnc controller can be prone to electrical interference and has been known to cause such problems. In the first instance try to use a quality double sheilded USB cable, hopefully this will fix your problem. Alternatively you may need to sheild your limit switch, estop and or motor cabling. My pick is that a quality USB cable will fix it though, worked for me.

    Click the link to respond:
    I have a planetcnc USB controller to run my project and when I start the 240v router the USB connection shuts down.

  • How to connect the 5 axis breakout board(old one) to the 1 Watt laser driver TTL input?

    Depending on the model BoB, we recommend wiring it to pin 6 or CP- for your z axis since our blackTooth laser and laser/spindle hybrid, will use the Z-axis as a trigger to enable the laser just as a CNC will use pin 6 or CP- for the z-axis to enable going downwards into the material.



    Additional Information:

    This is the BoB that i have.
    I am an absolute beginner at this laser stuff. So if i wire it to pin 6 which is the z axis step pin on my board. what else needs to be done if i am using the mach3 engraving plugin. Can i use the step pin of the 4th and 5th axis instead?

    Additional Information:
    How to connect NVMPG cnc with 5Axis Breakout Board

    Additional Information:


    Additional Information:


    Additional Information:
    كيف توصيل الليزر و ما ابرامج المفضله

    Click the link to respond:
    How to connect the 5 axis breakout board(old one) to the 1 Watt laser driver TTL input?

  • how many controllers board will i be able to used per one purchased of usbcnc software?

    We do not sell PlanetCNC licences directly, but our understanding from customer input is that PlanetCNC requires a license for every board. For complete and up to date information, you would need to contact PlanetCNC directly.

    Click the link to respond:
    how many controllers board will i be able to used per one purchased of usbcnc software?

Get Help with:
This Product
Orders
Tech Support
Sales
This Product
Order Query
Tech Support
Sales
Not logged in. Log In Register
Track Order(s)
View Order(s)
I Want to Schecule a One-On-One Paid Tech Support Session
Book an Appointment Pertaining to a BuildYourCNC Product (Free)
Ask a Quesion Below (Free):
Book an Appointment Pertaining Other Equipment ($60/half hour)
Book an Immedite Appointment Pertaining Other Equipment ($120/half hour)
Ask a Quesion Below (Free):
Waiting for response... I may not answer immediately, but I was notified on my cellular phone so my response is forthcoming. If I don't respond immediately, you can always go to the [My Account] page to see all of our chats at any time.