It seems to be getting some kind of interference or a short within the wiring or communication, try jogging the motors in the software without anything wired to the board. Then add one motor at a time to see if there is a short within your wiring or a faulty driver/motor.
If the USB breakout board continues to move the x-axis with no motors or driver wired to it, please email customerservice@buildyourcnc.com for a replacement or further troubleshooting.

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I am using USB breakout board with planet-cnc software. When I enable jogging keyboard x axis starts to move by itself (whether keyboard connected of not). When I press stop - it stops for a moment and then starts to move again. What could that be? Tried to reinstall software - did not help.

Planet-cnc is the best place to get information on setting up the software for the USB interface. We will test the z-axis plate homing method on Monday to be able to provide a more thorough explanation.

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Has anyone at BuildYourCnc ever tested homeing the z axis using a plate and ground clip using their BuildYourCnc usb breakout Board and a registered copy of Planet-Cnc software. If the answer is yes could they provide instruction from BuildYourCnc and not Planet-Cnc as their instruction does not work with BuildYourCnc USB breakout Board.

I would not recommend slaving an axis using the method of taking an additional axis from the USB interface. Instead, wire both drivers to a single axis on the USB interface. This will insure perfect signal output to both drivers. If you requre the motors to spin in opposite directions, simply wire one of the motors to the driver reversing the coil A and B connections, or use a hex inverter (https://www.buildyourcnc.com/tutorials/Tutorial-Two-Motors-Spinning-Oppositely-On-Single-Axis).

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I purchased a USB Breakout board, motors and drivers, paid for CNC USB Controller Software and I CAN NOT "Slave" an axis, but there is an option to do that. The moment I connect USB Breakout Board "Slave" option becomes shaded and I can no longer select it (becomes not functional). What is going on? Need help asap. Thanks

If the sensors are NC (normally closed) you can wire them in series. If the sensors are NO (Normally Open) you can still wire them to the same input, but the wiring needs to be in parallel (like a ladder). I have more information on the following video:

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[788] Thanks for the oportunity to ask, I am building a cnc and using npn closed sensors could you help me with the conection of these, do i still connect them in series if i use more than two in each axis. Also you mention that a stop switch should be connected grd and input to the controller would that be done after the 24v power supply. Thanks r

Did you try using the MDI and inputting a value for the turn to see if that works?

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[575] When I run turn software then everything works with mpeg mode. When I use step mode and wanna change x and z axis with keyboard then value change randomly. In one moment it change 0,095 and next time 0,1 and so on.

Dealing with our USB BoB, it is really similar to the MK1 board, but is also loosely based on their DIY board as well. We have not seen that much of jitters or jerks, that we have noticed here while fabricating and testing the boards. We have not heard that many issues dealing with the board about abnormalities in running, unless we have not been notified in regards to customers who have used them under continuous use.

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Its mentioned that your USB Breakout board is based on Planet-CNC's MK1 board. Planet-CNC on their forums mention that they've discontinued their MK1 because of a low buffer memory which caused jitters and jerks in the machine? Am I likely to face a similar problem with your board?

To home the z-axis using a plate:
- Connect the end mill using a large clamping device like an alligator clip with a wire connected to GND.

- Connect the plate (solder a wire to the plate) to one of the input pins.

- You can use the autoset to setup that pin in Mach3 simply by touching the two together once connected to the pin and GND.

Alternatively, the end mill can be connected to the pin and the plate connected to GND as long as there becomes a complete circuit when the end mill touches the plate.

To setup homing for the Planet-CNC homing and limits, go to the Planet-CNC Machine setup page which explains the process step by step: http://www.planet-cnc.com/faq/machine_setup/

Customer Response:
How do I get homing on z to work with planet cnc software using build your own usb board. I have gone to planet website and followed the instructions provided but my software will not allow entries in the required fields they are grayed out is it because I am not using planet-cnc's board, I have used this method for years with Mach3 and would like to use it with the usb board and software.

Answer:
Just received information from the developer. The instructions on how to use a plate for z-axis homing (moveable sensor) can be found here:

http://www.planet-cnc.com/faq/moveable_sensor/

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How do I get Homing on Z to work with Plate and Ground using Buildyourcnc usb board all the entries for the sensor in planet-cnc are grayed out. I am using input z- and I purchased the software

Depending on the board you are currently using, either the Parallel or USB interface board.
The parallel interface needs the USB cable for power(5v) and the parallel cord for communicating from the board to the computer and vise versa.
The USB interface board, will need a keyboard jog header made to fit the 12 pin connector(2 x 6). Making this connector will allow you to be able to wire it to a external panel, where you can use it to jog your machine rather than using the onscreen jogging.


Please contact customerservice@buildyourcnc.com for further assistance.

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I buy a four axis kits and i connect all parts respecting the plan. The USB connector is using for électric alimentation of the When I want to activate the engine with the computer keyboard , nothing works. The current 5VDC since green light is on but when I check with a voltmeter each pin , then I see that there is no current. What's happening?

Sure, the USB interface has a place for 4 axes of limit switches.

Each axis can have two limit switches: one for the ++ (positive) end and one for the -- (negative) end. The positive end would be the limit switch at the end of the machine that, say the machine has a 4'x8' area, reaches a bit after the 8 foot mark. The negative end would be the limit switch behind the 0 foot location behind the origin. If the origin is in the middle, the negative would be at a little more than the -4 foot end and the positive would be at a bit more than the +4 foot end. Note that you can have more than one switch on each pin where the NC is connected in serial fashion and the NO is connected in parallel fashion (this can be seen on the diagram in the multiple limits switch section). The software configurations for the limits switches are under File -> Settings -> Limit.

A typical limit switch has three connections on it. These connections consist of COM (common), NC (normally closed) and NO (normally open). The COM would generally go to GND and the NC or the NO would go to the pin. If the NC is used, then the the switch is constantly connected until the switch is pushed (engaged) then the connection from the pin to gnd is broken (open). Use the settings in software to set whether in NC or NO configuration.

Let me know if this information was helpful (or not) by adding information to this question. Thanks.

User response:
Thank you very much for this helpful information. I'm still a little fuzzy on how the 6 limit switches physically connect to each other and to the USB breakout board. You've stated one switch (home) goes to positive and another switch (limit) goes to negative. Are all the GND prongs from all 6 switches connected to each other and going to GND on the breakout board, or no? And the NC prongs, how exactly are they connected to each other? And to the board? There has to be a diagram somewhere shows this visually, no? I don't know how to wire the switches in series or in parallel. I have already physically installed all the switches on the machine and ran the wires to where the board is. Now I just need to know where to plug these wires into the board. Also, taking into consideration that I'm using the Planet CNC software, the only settings I have pertaining to limit switches is "Enable/Disable" for each axis, and the actual limit for each axis. Nothing about NC or NO. Is that only in Mach3?
Thank you.

buildyourcnc response:
On the USB interface, the COM on the switch connects to GND and the NC or NO connects to the input pin (i.e. x++, y--, etc.)

Limit switch configuration is rather difficult to understand, especially with series and parallel. You can think of series as a single wire going from GND to the axis letter input terminal (i.e. X++ or X--). If the wire is broken, then the circuit is open (or the switch is engaged in a normally closed scenario). Normally closed is like an actual wire, and when engaged, the switch "opens" (breaks the wire). This is why we recommend in some systems that you can put many switches in series on a single pin. When one of the switches is engaged (breaking the connection) then the entire circuit of switches is broken and the machine stops.

In a parallel scenario, the state of the circuit is always broken until the one of the switches is engaged and the circuit is then closed or connected. The topology looks like a ladder. All the switches connect to both sides of the ladder and the switches are like the runs of the ladder (the horizontal bars that the feet are placed while climbing). Imagine all of the switches broken in this scenario (normally open). It would be like the ladder could be split in two, but if one of the ladder runs (switches) is closed by engaging it, then that run would connect both sides of the ladder and the two sides of the ladder would have a connection.

There is a diagram on the USB page of the various limit switch configurations. If you need more information (visual and/or otherwise), please let us know and we will immediately add that information to benefit everyone.

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I have nearly completed the CNC machine from the book, but I am using it with a USB breakout board, and have no idea how to wire the 6 limit switches to the board. I'm having difficulty following the diagram on the USB breakout board screen. Can someone please help me?

You can do raster and vector engraving on the greenBull laser/spindle combination. The methods of this process is not accomplished in the same way as the typical laser machines where CorelDRAW is used. The Mach3 laser plug-in can be used for the raster engraving and standard CNC g-code can be used for vector cutting and engraving.

The raster method will not be fast on the greenBull since the z-axis is heavy and there are inertial limitation on doing fast raster back and forth movement. Vector is the best use of this machine.

Additional Information:



Additional Information:



Additional Information:

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I am looking at purchasing the greenbull 5X system with the laser/spindle combination. Can the laser do both rastered engraving as well as vectored cutting with the same breakout board and software? If I have this wrong please let me know what would be needed to accompish this.

You can download a trial version of PlanetCNC software from their site at http://www.planet-cnc.com/index.php?page=software to see how you like the interface. If you look at their main GUI screen, along the left side you will see 4 boxes labeled X,Y,Z and A. These represent the axes the software is equipped to control. (A being Axial, or rotational motion) Typically a separate motor and driver is used to control each axis. If you plan to switch axes you will need to connect and disconnect the outputs from your software to the drivers.

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sorry, this is what i meant to say: OK, so if I use the USB version then I would find the rotary/linear axis definitions in the planet cnc control software somewhere. I will be needing to change axis type often for various projects that is why I am asking.

I have not hear of this. This cold be an issue with using later firmware, but I have not come across having to cut the trace for the reset enable on the Arduino board.

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Have you heard of the requirement to cut the Reset Enable trace on the Aruduino Mega for a Makerbot Thing-o-matic? Does this apply to the whiteAnt 3d printer? The trace on my Arduino board is definitely connected and I am experiencing issues with connectivity. Please advise.

Did you connect the USB connector to the breakout board?

Additional Information:
YES I CONNECTED THE USB TO THE BREAKOUT BOARD

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I connected the electronics (for 2 x 4 feet) that I ordered from you. But how do I check if I connected all the wiring properly. There is neither any light on motor drivers nor on breakout board. And the motor shaft also does not move before and after the power supply is given.

Mach3 is not compatible with the USB breakout board, so you need Planet CNC in its place.

Additional Information:

I am confused by this same issue. I am using the Mach3 USB interface board with Mach3 and it works fine. In fact a video of it is on this very website. (link below)

Is the Mach3 USB interface board the same thing as Planet-CNC USB board?
It has been stated on this FAQ that it cannot be used with Mach3 and can only be used with Planet CNC USB software.

https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board

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In a Windows configuration, Using the USB breakout board, is the Planet-CNC software used in conjunction with Mach3 or in place of it?

All USB boards, are tested and checked before shipment for all axis, and inputs. Here is a link with clear instructions on how to setup Planet-CNC (http://www.planet-cnc.com/faq/machine_setup/).

Please check continuity and for any crossover disruption when wiring your board, try to wire each as cleanly and with out crossing any live power wires and or motor motion wires.

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I have a usb cnc driver board on your 1'x3' cnc and i cant get the z+ limit switch to stop the machine in the provided software. It registers the button but doesn't inhibit movement. inversly the button works when selected as '-' for negative movement.

Does the machine move smoothly when using the keyboard to jog the machine?

Additional Information:
Sorry it took so long to respond. Yes the table moves very smoothly using the keyboard. I try to reinstall of the drivers but it still moves very jerky with the MPG, sometimes moving back-and-forth.


Additional Information:
Sorry it took so long to respond. Yes the table moves very smoothly using the keyboard. I try to reinstall of the drivers but it still moves very jerky with the MPG, sometimes moving back-and-forth.

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Hi I recently replaced my parallel port breakout bored with a USB breakout board, Motors Earl working properly but my wireless MPG is not working properly, it is jerky when to try to move across the table, is there a setting that I missed?

If you are using Mach3 do you have your hotkeys set up correctly?

Additional Information:
The office was closed on the weekends and during Dr. Martin Luther King Jr. Holiday.

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I got my Blackfoot 4.3 built. Hooked it to the Redleaf and when testing the axis controls Im able to move the X axis using the Right arrow key, but unable to move it with the left key. I have no control on my Y axis. Tried calling for tech support and recieve voicemail 2 days in a row after a few calls each day.

Have you tried entering a command in the MDI for that turn axis? What happens when you do?

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[575] Hello! When I use turn software then everything works with mpeg mode. When I wanna use step mode and change axis positions with keyboard then x,z positions changes randomly.How I can fix it ?

No, we have gotten away from the planet-cnc boards as they have decided to not support our board with their software. You can use the Mach3 USB board as an alternative. You will be better off with Mach3 as a control software as this is widely used and supported.

Mach3 USB board:
https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board

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I have the older discontinued USB breakout board. The y-axis no longer works and have traced it to the breakout board. Is there a replacement board that can use the same Planet CNC software running on Windows 10?