If you want speed control, it is recommended to use the RS-485 connection on the VFD and use the control program such as Mach3 to communication serially with the VFD using this RS-485 connection.

If you would rather use a controller such as the PMDX-107 to simulate the effect of a potentiometer using the Aref, Aout and Agnd and the Rev/Dir and Fwd/Run terminals to control operation and direction, you can connect those to the VFD.

PMDX-107 Aout connects to the VI (analog voltage in). This is like the wiper on a potentiometer.
PMDX-107 Agnd connects to the ACM terminal on the VFD for Analog common.
PMDX-107 COM connects to DCM terminal on the VFD for Digital common.
PMDX-107 Fwd/Run connects to the FOR terminal on the VFD for Forward.
PMDX-107 Rev/Dir connects to the REV terminal on the VFD for Reverse.

Refer to your PMDX-107 manual to correctly configure your dip switch settings and make sure to calibrate (tweak) the speed control using the trimmer next to the terminals on the PMDX-107.

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I have the USB controller board and the 8825 step driver. I need a wiring diagram between the two. Specifically, what does the GND pin on the X-axis connect to? Also, what does the 5V pin on the driver connect to?

You can find a wiring diagram here:
https://buildyourcnc.com/item/electronicsAndMotors-electronic-component-USB-Controller-Breakout#prettyPhoto/2/

The CP terminal is wired to the step terminal on the 8825 step driver.
The CW terminal is wired to the direction terminal on the 8825 step driver.
The GND terminal connects to the GND on the 8825 step driver

The 5V connector on the driver simply powers the logic side of the chip and needs to connect to VCC pin on the keyboard jog.

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Thanks! Working now.

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I have the USB controller board and the 8825 step driver. I need a wiring diagram between the two. Specifically, what does the GND pin on the X-axis connect to? Also, what does the 5V pin on the driver connect to?

The connections for the Mach3 USB CNC Machine interface card you refer to is connected as follows:
- All of the "D" connections such as XD, YD, ZD and AD are the direction connections and are connected to the CW- connections on the drivers.
- All of the "P" connections such as XP, YP, ZP and AP are the pulse connections are are connected to the CP- connections on the drivers.
- The 5V connections on the USB board are connected to the CP+ and CW+

Here is a link to the wiring diagram:
https://www.buildyourcnc.com/Documents/Electric%20Wiring%20Diagram.pdf

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the tutorial for the discontinued usb card is great but i have your usb motion card stb4100 i need with AD AP +5v wired to the cp+cp-cw+and the cw-

Yes, if you need a replacement part on your machine please call us at 281-815-7701.

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I have a blacktooth laser engraver. The Y Axis stepper motor needs to be replaced. Can you please provide me with the information I would need to replace this motor.

You can find wiring diagrams and illustrations for the spindle on this page: https://buildyourcnc.com/item/spindle-inverter-2!2kw-spindle-novfd

This information pertains to the 2.2 kW spindle; however, the wiring is the same for the other spindles as well.

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I am missing the wiring information for the 1.5kw spindle, my electrician says I need documentation for the 4 prong connector into the VFD

To connect the stepper motor drivers to the Mach3 USB interface card, you will need to follow the wiring diagram here: https://www.buildyourcnc.com/Documents/Electric%20Wiring%20Diagram.pdf
which can be found here: https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board along with all of the other manuals associated with that interface card.

Please note that the DC+ and DC- on that wiring diagram (power supply to thye stepper motor drivers) is not correct. The DC- is connected to GND on the drivers and the DC+ is connected to VCC on the drivers. Typically, the DC+ on the power supply is labeled V+ and the DC- is labeled either COM or V-.

If you are having any issues with the wiring, please let me know and I will elaborate. Thanks.

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Yawl sold me a ST-USB MOTION CARD I have surched all your electronics and can't find wring instructions I need to know where to connect X,Y and Z to this controler

You can find the wiring diagram for the Mach3 USB card on its product page here:
https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board

Here is a direct link to the diagram:
https://www.buildyourcnc.com/Documents/Electric%20Wiring%20Diagram.pdf

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I need wiring instructions for the ST- USB MOTION CARD

Could you specify which breakout board you have? If you have a parallel port version, be sure that you have purchased the "legacy" parallel port version from Mach4. If this proves not to be the problem, please feel free to email us directly at techsuport@buildyourcnc.com or call 281-815-7701 for troubleshooting instructions.

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I need a resource, we bought 2 redfly systems and mach 4, We put one motor on for the x axis but cannot get it move. Can you direct us to some tutorial?

To move two stepper motors simultaneously with the same signal, simply wire the two stepper motor drivers to the same interface board signal terminals (CP and CW).

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using a ardino uno controller and a cnc sheild on top of that how to wirer 2 motors to 1 axis its the x axis ?

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I have my motors wired like the wiring diagram I have two motors on Y axis how do I wire the second motor

The NENA 14 motor is paired with this driver and will work very well: https://buildyourcnc.com/item/motion%20electronics-steppermotordriver-newbiehack-Motor_Drivers-2!5_Amp_modular

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I cannot find a driver for the NEMA 14 Stepping Motor (17 oz-in 1/4" dual shaft) on your site, would something like the Pololu DRV8834 be okay? (I note that the stepper requires 2.7v)

All the options for and variations of our blackTooth laser cutter/engraver are available on our website here https://buildyourcnc.com/blackToothLaserCutterAndEngraver.aspx#prettyPhoto. The wiring diagram is available here: https://buildyourcnc.com/blackToothLaserCutterAndEngraver.aspx#prettyPhoto/0/
We do not offer plans or a bill of materials for our machines at this time, but if you are interested in doing your own from scratch you can learn a lot about the design and build process from our tutorials. We wish you success in your endeavors.

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How can i get a complete list of all the components (electronics) I need for a CNC laser cutter with the laser controller? A wiring Diagram would probably be very helpful.

We recommend checking the dip switch settings on your drivers, having the correct microstepping/amp settings along with the steps/unit will help the motors run as effective as possible.
This is a default parameter that we use while we test our motors:
Driver dip switch settings will be at a 1/16 microstepping and 2.7amp (11001100) for x/y-axis and the z-axis will be at 1/4 microstepping and 2.7amp (10101100).

In planet-cnc with increasing the motor speed, you will have to modify the settings in planet-cnc (File/settings/setup) you will modify the initial speed, maximum speed, and the acceleration.
X/Y-axis step/unit: 1422.22 initial speed:500 maximum speed:750 acceleration:25
Z-axis step/unit: 1600 initial speed:100 maximum speed:300 acceleration:25
The initial speed and maximum speed will have to be roughly tested and adjusted per application.
Make sure to adjust the JOG slide bard underneath the axis controls on screen to about 750, to compensate for your x/y-axis adjustments. If left alone the speed will max out at the default setting.

Here is a video tutorial to calculate the steps required depending on your mechanical linear motion components. (

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I bought Nema 24 motors and driver package with usb board. What do i need to have more speed? Cant even jog past 25 ipm without the motor stalling (not having enough torgue)

Have you considered reversing the A and B coils on one of the motors to the drivers? This will cause the motor to spin in the opposite direction. This is the easiest method. Using the HEX inverter is a more complex method and not recommended for simple driving tasks.

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I have two nema 34 motors on my gantry and ordered a hex inverter, now I need to wire it correctly. What type of wiring hardware do I need and I will need a wiring diagram also. Please help.

Have you considered reversing the A and B coils on one of the motors to the drivers? This will cause the motor to spin in the opposite direction. This is the easiest method. Using the HEX inverter is a more complex method and not recommended for simple driving tasks.

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I have two nema 34 motors on my gantry and ordered a hex inverter, now I need to wire it correctly. What type of wiring hardware do I need and I will need a wiring diagram also. Please help.

The relay is only used for devices like routers, spindles, coolant, mist, etc. The relay works like an automatic switch and will allow current to pass when the relay is engaged.

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The relay doesn't have a A+ B - it has signal in god. 5v. / 0 S P. This has to go to my USB motion card wiring shows v+ goes to top of coil no number and comes out the bottom to #2 the relay I got from you is not that simple

Yes, the RNRMotion.dll file must be used and put in the plugins folder under the Mach3 folder.

The XML file that I link on the Mach3 USB controller page is the file you should start with. This file will have the necessary configuration that links the Mach3 USB controller to the Mach3 control software. You can then make whatever changes you need to this configuration to tailor it to your machine.

Do you see a quick flashing red led on the board when you press the arrow keys?

Additional Information:

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[575] Do I have to use the motion driver and configuration file to use this card? The x,y,a shows that it's moving on display, but the motors aren't moving.

Depending on the Breakout board that was purchased with your electronics combo, either USB or Parallel:
USB: https://buildyourcnc.com/item/electronicsAndMotors-electronic-component-USB-Controller-Breakout#prettyPhoto/2/
Parallel: https://buildyourcnc.com/item/electronicsAndMotors-parallel-breakout-relay#prettyPhoto/2/

These will have the inputs labeled on the board itself, for example:
USB will have the inputs for all the axis from X, Y, Z, A, limit switches.
Parallel there will be 4 inputs 10, 11, 12, 13, 16(relay). Which can be used as E-stop, Limits (for all axes if wired in a closed loop), and one relay for a spindle control on/off via mach 3 or mach 4 or a specific relay control that you desire.

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Do you have a wiring diagram for a 3 axis system using your compotents. It would be nice if it showed the estop, limit switches,relays...

Here is the information we have for the Planet CNC USB controller:

https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-USB-Controller-Breakout-Planet-CNC

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Please advise correct wiring from PLANETCNC USB controller Mk3/4 to motor driver.

The use of the hex inverter in the application to invert a direction signal to have a motor run in the reverse directions is relatively simple.

First, go to this link and look at the chip diagram:
https://www.buildyourcnc.com/item/electronicsAndMotors-hex-inverter-breakout-newbiehack-integrated_circuits-hex-inverter

Connect 5V from the USB interface tothe VCC pin. The pin on the keyboard jog header can be used. Connect the GND pin from the USB interface to the GND pin on the hex inverter. Connect the CW terminal from the USB interface to the 1A pin on the hex inverter. Connect the 1Y pin from the hex inverter to the driver.

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I got a question??? I am a dummy when it comes to cnc. I got 6040 1500kw water cold engraver 3 axis from china. I can not get anything out of them pertaining help they keep telling me the same thing over and over and over and I'm doing it and send them pictures that I know. Anyway email me a wiring diagram for the PRT 1500 watt spindle motor control box and has the emergency stop on and off switch manual PC and of course yhe screanm fultonsbusiness@gmail.com

Additional Information:
I got a question??? I am a dummy when it comes to cnc. I got 6040 1500kw water cold engraver 3 axis from china. I can not get anything out of them pertaining help they keep telling me the same thing over and over and over and I'm doing it and send them pictures that I know. Anyway email me a wiring diagram for the PRT 1500 watt spindle motor control box and has the emergency stop on and off switch manual PC and of course yhe screanm fultonsbusiness@gmail.com

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Is there a wiring diagram for hooking up your hex inverter between your USB breakout board and the controller?