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A public service announcement:

Everyone, we want to help you, really, we do. However in order to provide you with the best possible level of support, you need to also provide us with some basic information. So, here are a few things that are important:

If you have just installed your Cohesion3D board and are having issues
Take a picture, or several pictures, of the connections, all the wires, where they're plugged in, and post them in your initial post. Take a picture of the stepper drivers so it's easy to see their orientation. Having the pictures will help identify problems with the wiring, if any. If you want to post the pictures as soon as you've installed the board just so we can verify your connections, by all means, do. Not every machine is built the same, not every machine have the same set of wires or control board. We can't be guessing what yours looks like, well, we could, we just don't want to.

When you run into problems
Check out the online documentations at - there are several instructions, images, diagrams, and pictures submitted by others who may have the same setup as your machine. Try to do some debugging first: check the cables, make sure they're all plugged in right, and in the right spot (you did post pictures, right?). It could very well be something as simple as not having pushed one of the connectors in all the way.

When you post about whatever issues you may be having
Please follow instructions given as we try to debug things with you. It's hard trying to figure out what's going on if you don't follow directions. Things like screenshots are important! And please try not to jump ahead when we're trying to help debug problems. If someone asks for the results of step A, don't jump on ahead and come back with step C. We try to be methodical when debugging problems. All we ask if that you follow along. Also, please be descriptive. "I plugged it in and now I get nothing." That means absolutely nothing. What have you done, what have you tried, what software are you using, on a Windows, OS X, or Unix (Raspberry Pi).

Grammar & punctuation!
This may seem like we're nit-picking but please try to write proper sentences that one can understand. The nature of social platforms such as Facebook and Google Plus makes this a very diverse group and the last thing we need is to try and decipher what you are trying to convey to us. Write proper sentences, use punctuation where required/needed/necessary, make it so that there is little to no chance of anyone misinterpreting your post or what it is you are having an issue with, or wanting help with. (and remember to post pictures!)

Is there a document showing all of the supported Cohesion3D g-code commands?

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Just got a C3D mini and finished installing it in my K40. A quick test and it seems to behave and speaks to Laserweb and I used Printrun to test the steppers.

The issue I'm seeing is garbage on the LCD. I read through the older posts and I see this has come up before. It doesn't matter if I power the K40 first then plug in USB or not, it still comes up with two bars of garbage.

Are there some known troubleshooting steps for this or do I just try running the C3D from a separate 24v supply ( planned anyway so I can install my Z table ) ?

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Flipping x and y - had to flip Y so that it wasn't printing backwards. Now I have to dump stuff into the negative y area (so 0,0 is back left as home, front Y is 0,-200)

Is this flipable in software?

config in paste bin


I had hoped the disconnect problems went anyway by switching machines but they return after behaving the first laser cut. They don't seem as frequent yet and don't seem directly tied to firing the laser but still LaserWeb keeps randomly disconnecting from the Cohesion3D mini board. 

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currently suffering from lack of power. 100% at laser cut is 16ma. Max power used to be 21ma on the ramps board and I had to ramp it back to 18ma (85% power). Currently cutting with 1.0 power, 0.1 min and 1.0 max if none is specified.

pastebin code is here:

PWM doesn't seem to do anything. 200 and 400 are almost identical on output. I've knocked it down to 100 on this. Still no change.

I am controlling PWM via the PWM pin 2.5 - any help appreciated. Rastering is working nicely, I get a good result for very light images if I set 9% min power, 15% max power, 300mm/sec - but if I go to 10% power it jumps up by a power of magnitude...

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Pleased with my purchase and installation of a Cohesion 3D mini I want to extend my compliments to the company and it's customer service.  All for an extraordinary purchase price for the C3D bundle.

To understand the C3D customer base I share I am a long time academician with 4 undergraduate and a doctorate.  I'm a 60 year old retired university executive.  I provide this information so to explain my experience with electronics, firmware, or software coding were elementary.  Recognizing my capabilities I chose to obtain the professional services of Ashley Kirchner.

A lifelong hobbyist in woodcarving my interest in a k40 was based in the desire of engraving or cutting materials I hand carved.  To that end I wanted to purchase a proven board.  My first choice was the C3D. It had the record of an excellent smoothie board.  But of paramount importance was to have a board with a USB or L.E.D. control path that gave me the capacity to acessorize it's capibilty with the most important motorized Z axis table and an A axis rotary.  These were required so to better utilize the C3D in working with an adjustable working plane to accommodate larger objects for engraving.  The rotary provided the capibilty to execute full circumference engraving.  To reach my desired platform for my k40 I realized the OEM boards cannot accommodate the expanded capibilty with a single control source.  Oh I also wanted the capibilty of a software that could control the aforementioned options and have an intergrated webcam viewer.  That seemed utilitarian and practical as a safeguard with continuous laser operation viewing from a safe and comfortable position while seated at my computer.  The C3D was the sound infrastructure and the brilliance that is LaserWeb4 provided a workhorse of controlling software that encompasses all the functions I required.

Installation began with my desire to contract professional technical support so that I could move forward quickly and correctly in the basic C3D install and the enhancements of the Z and A axis hardware and software.  I quickly knew I'd made the correct decision and that the reasonable fee I chose to retain Ashley's service.

With Facebook Messenger as our communications method we proceeded together with a quick validation by photographic exchange of the installation of the new C3D board in place of where the OEM board had been.  It fit perfectly with no modifications necessary to accept the new board.  However, I did drape the contents of the electronics cabinet as I increased the USB passthrough portal slightly so to correct the tight placement of the OEM.  

As I gently removed the k40 OEM board it was notable that bits of solder and a resistor simply fell from the OEM onto the floor of the cabinet.  Then I must mention one of the wires from the power supply simply slipped out falling beside the other raining particles.  Upon careful examination I found one of the 4 wires was simply slid uncrimped into the male PS socket and "secured" with hot glue when the OEM was installed.  I still share this so to once more emphasizing the necessity of careful examination of EVERY wire and seating of plugs into sockets immediately upon receipt of any k40.  After that consider carefully if you want a board with a history of these calamities for your own safety and efficient operation.  In my opinion the prudence of immediately purchasing a high quality C3D is an unavoidable decision.  The reasons should be self-evident.  I will also confirm the connections from to the OEM were disconnected and seated in like sockets on the new C3D board with NO modifications.  None.


Now along the necessary steps in placement of the micro SD card the LaserWeb4 software was downloaded and installed without difficulty.  There were a few items that had to be updated or edited to match my needs.  Those would later include enabling the Z axis and A axis rotary in LaserWeb4.   It's here you must change the Z axis feed rate to a reasonable setting of 15mm or of your choice.  But don't leave it at the default 300mm or the first time you jog the z table within the LaserWeb4 software or via the cool LED toggle it's speed will rattle your teeth.

To install the Z and A with intergrated C3D and LaserWeb4 control you will require adapters for both the Z and A sockets.  MAKE CERTAIN TO ALIGN THE SEMICIRCLE THAT APPEARS ON THE ADAPTER WITH THE SEMICIRCLE THAT APPEARS ON THE C3D BOARD!

A wiring diagram is available within the C3D community site detailing connections of the stepper motors to the necessary external TB660 stepper drivers and then to their respective Z and A stepper adapters.  You cannot drive the Z and A from the mini stepper drivers like you did the Y and Z axis.  You will need an independent 24v power supply dedicated to the Z and A.  The only power source from the C3D will be the 5volt wire with a "Y" which each tail of the "Y" power supply wire carrying the team 5volts going to the Z and A external stepper drivers where they will be triple placed in both stepper drivers as demostrated in the aforementioned wiring diagram.  

One all connections are validated it will be necessary to download, edit, and flash the C3D as described elsewhere within this community site.  You will also need to enable the Z and A in the LaserWeb4.  You may also configure your webcam

Clearly my Epistle is long.  It's intent was to give some sense of the installation of the Cohesion 3D mini board.  Choose the C3D bundle.  For only a few more dollars you will have a control L.E.D. panel to control your k40.  With great excitement I set the POT at 15mA and left it there.  Henceforth all power increments will be made via the LaserWeb4 software or the C3D L.E.D.  As I celebrated with a happy dance I pulled the dongle from the PC USB slot and packed it away with other outdated technology.

With great compliments to the C3D company, expressly Ray, the LaserWeb4 team, and my special contract expert Ashley the entire installation of all of the hardware and software described herein (sorry I'm a lawyer, I've gotta throw out a herein, whereby, henceforth, any other archaic prose) was installed in full working order in relatively short time.  I in the Southern United States and my expert in Colorado all was done with great efficiency via Facebook Messenger.

Most users will have the capacity to install this equipment trouble free.  But if you require a higher level of service their is a "Geek" available at reasonable cost.  That's between you and Ashley.  You MUST NOT be discouraged if you require an elevated level of one of one guidance and support.  There's NO SHAME in contracting Ashley's professional services.  Otherwise you may post questions as they become necessary in the manner requested by the C3D Community.  They cannot reply to inadequate description or examples.  They are doing so as a compliment, free service for all.  As I specified my path was an invaluable one.  One worth the reasonable expense outside the arrangements with C3D.  It was our independent arrangement.

Moving forward I will have no difficulty is posting definitive questions with concise photographic example to this C3D page.

One last word.  Great product!  I am looking forward to mastering it's use in conjunction with LaserWeb4 and their superb collective of experts.

(Notice:. I am in general terms sharing a positive experience in the successful installation of the C3D. This must not be construed expressly, or by inference as a technical writing suitable for installation of same. One should identify and apply directions of those with exoertease with said product.)

Still having corruption issues on the flash card i formatted 2 cards one samsung 8gig and a sandisk also a 8gig fat 32 and copied the files from the original to them both neither one boots upp the mini but look identical on the computer and all show fat32 in windows 10 properties by not booting the glcd powers up backlight no image and screams and no communication to pc original works after it is put in the pc and doing a check and repair drive and deleting any gibberish files that appear on the card it must be getting corrupt either on booting or on shutdown any ideas why i cannot make a 8gig fat 32 flash card boot it has the same files as the original

So far take #2 of installing my Cohesion3D mini went well (got a different machine). This one had the ribbon cable m2nano but I followed the instructions of the swap just fine. No issues yet anyways but only cut and engraved one small item so far. Here's hoping all continues to go well. :)

Does anyone have a cutting template for the optional LCD screen? Was going to make a cutting template for mounting it in panel above the other controls on my K40.
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