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### Question #: 10104

Question: Is there a specific process for aligning the x axis on the greenbull? There is mention of it at the end either the rail or gantry installation but I could not find it anywhere.

Current Solution

If you are referring to aligning the rails so that the rails are perfectly parallel:

It is important to make sure one rail (a rail at one side of the table) is perfectly aligned first. Do this by fastening one end of the rail to the table (flush with the table edge), then fasten the other end (flush with the table edge). The rail may not be perfectly straight at this point, but that's ok. This process includes the top and bottom rail, fastening and positioning simultaneously.

You are going to fasten the midpoint of the rail. Get a clamp ready so that you can freeze the rail in place. Look down the rail from one end. This is a good way to determine if the rail has a curve, or is straight. If there is a curve, move the rail midpoint laterally until the rail is straight while looking down the rail from one end of the rail. This may take a couple of people to do, one looks down the rail, the other moves it slightly until it is straight and then clamps the rail. Drill and fasten the midpoint when satisfied. Repeat this process, fastening at the midpoint between screws.

Now place the gantry on the table with the v-groove bearings resting on the one rail side. Add the next rail to the other side of the table. Position the rail so that it is directly under the other bearings. Make sure the gantry is at the extreme end and fasten the rail at that end. Move the gantry along the and fasten the rail as you move the gantry so the rail auto-positions itself.

Thanks for your answer. So the next step is making certain that the gantry is exactly perpendicular to the x axis. Do you just place a square on the rail and adjust one or both chains as needed?

Respond:

### Other Possible Solutions to this Question

• How thick can the Greenbull cut and what kind of material? Wood, plastic, steel? I was also wondering if there is one anywhere in Nevada, Idaho or Utah that I could possibly see in action. Thanks

The greenBull CNC machine kit can cut as thick as a material as you desire depending on the reach of the end mill that you provide the machine, if it is a straight vertical. The reason for this is that each pass is incremental (multiple passes at a certain depth per pass). For instance, if you need to cut a 2 inch thick piece of wood, you can make, say 3/4" passes until the target depth of 2 inches is met.

The depth per pass, feedrate and RPM will be determined by the material: wood, plastic, metal and will also be determined by the end mill that is used for that material. Selecting the appropriate end mill is very important. Feedrate and RPM is important to make sure the end mill is as cool as it can be during the cutting process.

How thick can the Greenbull cut and what kind of material? Wood, plastic, steel? I was also wondering if there is one anywhere in Nevada, Idaho or Utah that I could possibly see in action. Thanks

• I was in the process of aligning mirrors for our vertical XL and suddenly the laser does not fire anymore, there is an arcing sound and a light near the Anode (positive) connector of the tube on the very inside. Do you think the laser tube would go bad so quickly? how could we avoid this?

Can you check if there are cracks in the inner glass tube? Also, check to see if there is water between the inner glass tube and the outer glass tube. That will give you an indication of cracking in the inner glass tube.

• I'm assembling the gantry for a 5x10 greenbull and noticed that there are 9 spaces for torsion spacers but only 7 in the kit. Should I just space them out on the right side behind the motor?

That is correct. We send the fewer ribs than could be fastened within the gantry. One reduction of a rib will provide more space for the motor at the midpoint of the gantry and at the other side of the gantry (opposite the motor) can be reduced to provide more space to work with the coupling.

I'm assembling the gantry for a 5x10 greenbull and noticed that there are 9 spaces for torsion spacers but only 7 in the kit. Should I just space them out on the right side behind the motor?

• I am interested in buying the greenBull 5X Long Z CNC Machine Kit, but it is not clear for me what is included in this kit. Is there anything else I need to get the machine work?

The greenBull 4X comes with all of the components and electronics to assemble the gantry of the machine. You will need to build the table. We provide the rails and roller chain for the X-axis (along the length of the table for full 8 feet of travel). You will need to provide some wire to connect the electronics and a computer to run the machine. You will also need to purchase the software that you will need to run the machine that matches how you will apply the machine. We suggest the mach3 control program. The CAM program is up to you as there are many options out there.

I am interested in buying the greenBull 5X Long Z CNC Machine Kit, but it is not clear for me what is included in this kit. Is there anything else I need to get the machine work?

• I have NEMA 34 motors for a GreenBull 6x12. After 2 weeks of use, my Y axis motor has developed play in the front but not rear of the motor. Is this a motor defect or has something come loose somewhere? Thanks,

If there is play within the motor itself, then that motor may be defective. Call us to provide us more detail on this issue.

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• Am I supposed to drill a hole in the back of the gantry to access the wires for the motor?? There does not seem to be a way to access the wires for the x axis motor once the gantry back is installed.

The installation of the motor inside the gantry is mounted and wired before installation of the back plate of the gantry. For Example, our blackFoot machine seen in steps(124/139), you can see that the gantry and and z axis is complete finished before back plate is placed.

Am I supposed to drill a hole in the back of the gantry to access the wires for the motor?? There does not seem to be a way to access the wires for the x axis motor once the gantry back is installed.

• Have there been problems with the Greenbull stepper motors overheating? I'm considering adding a fan with filtered inlet and outlet on the gantry plus heat sinks on X, Y and Z.

The motors do get conditionally hot, because of the constant current going through the motor. The motors should not overheat and stall/fail they are built in the manner to withstand the constant current and heat. Modifying the machine to something that is considered a safe/personal machine is recommended for all our machines.

Have there been problems with the Greenbull stepper motors overheating? I'm considering adding a fan with filtered inlet and outlet on the gantry plus heat sinks on X, Y and Z.

• I bought Mach 4 and Mach 3 USB Motion card STB4100. The installation Manual you direct me to is for installing board with Mach3. Where can I find directions for the combination of products I bought? The axis motors are held stationary by the magnets but when I try to jog an axis from mach 4 program, no movement.

The fact that you cannot move the motors with the keyboard serves as a clue to a couple possibilities.

- The software may not be communicating with parallel port. (One possibility may be that your step pins are not low active, or vice versa depending on your drivers).
- You may not be in the correct tab of Mach3. Make sure you are in the Program Run tab.
- The jog on/off button on the program run screen may not be lit (invoked).

This address below shows the complete troubleshooting for this type of situation. It will show how to test each pin at the parallel port at the back of the computer and everything else associated with correctly wiring the electronics.

https://buildyourcnc.com/CNCElectronicsandWiring.aspx

6 axis robot with Mach3 Card 6 Axis Motion Controller

• I bought Mach 4 and Mach 3 USB Motion card STB4100. The installation Manual you direct me to is for installing board with Mach3. Where can I find directions for the combination of products I bought? The axis motors are held stationary by the magnets but when I try to jog an axis from mach 4 program, no movement.

I am not using a parallell port. I am using a USB.

• I have a green lean machine that I acquired from a friend that had to move cross country and could not take the machine with him. It was partially disassembled and stored in his garage. Unfortunately, he lost a couple of parts I cannot easily replicate. Is there a parts list anywhere for this machine so that I can order replacements?

Yes, you can contact me at customerservice@buildyourcnc.com to get the full BOM for that machine.

• How do I know how to hook up the red fly? What color wires do I solder on which pin of the connectors? Was there suppose to be any instructions that came with it, or the entire greenbull for that matter?

The greenBull instructions are found on our website. Each machine has a page, which you can locate by clicking on "CNC Machines" from the left hand menu and choosing the particular machine you have. Scroll to the bottom of that machine page and you will find complete instructions. The page for the greenBull 5X, for example, is : https://buildyourcnc.com/Item/cnc-machine-greenBull-v4-5X

The redFly is typically sold with motors already wired to conductor cable with 4-pin connectors; these need simply to be plugged into the control box. There is no soldering required. If you have a different configuration, please contact us directly at techsupport@buildyourcnc.com with information about your specific application (and a photo, if possible) and we will be happy to provide you with further guidance.

How do I know how to hook up the red fly? What color wires do I solder on which pin of the connectors? Was there suppose to be any instructions that came with it, or the entire greenbull for that matter?

• The blue insert on my laser cutter nozzle broke during install. Is there anywhere I can find a replacement.

Yes, we will provide one on the website (4/10/2014).

The blue insert on my laser cutter nozzle broke during install. Is there anywhere I can find a replacement.

• How do I order 3 specific lengths of lead screws in one order? I could only order a single total amount via the shopping process. I require 36", 60" and 14". If I order 110", I will get 79" + 31". Do I have to order 115" and pay for an extra 5" to get around this?

Just specify the full length in the quantity field in the shopping cart and give us a call to inform us of the cut lengths (you can also email customer service - link in the contact us page - link at the footer). We are working on a way to do this at the product page, but won't be finished for a few more days.

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• LIMIT SWITCHES FOR AXIS. THE PRINT SHOWS THAT YOU CAN WIRE LIMITS EITHER N.O. OR N.C. SO IF THIS IS CORRECT I WOULD NEED TO TELL BOARD IN SOFTWARE HOW LOOK AT THESE LIMITS, I'M GOING GET AN INPUT LOOSE DEPEND ON IT.

BYCNC Response:
This is correct. You will need to use a method appropriate for the software you are using. Also remember that NC switches are typically wired in series, while NO switches are normally wired in parallel.

User Response:
I am using the cnc planet software for your USB board. Are the limit configurations in this software?

BYCNC Response:
Yes, Planet CNC software is compatible with the use of limit switches. Configuration information will depend on your specific application. You can view Planet CNC's information here: http://www.planet-cnc.com/files/CNCUSBController.pdf

• Planning to Buy Greenbull or Blackfoot 4'x 8' Long "Z" Axis. My questions are: what is the hight between the table and the Gantry ? what maximun Z can useful engraving? if I instal a rotating 4 Axle. what maximun diameter can be useful.

Only our greenBull CNC machines will be able to use the long Z-axis, due to structural construction of the greenBull over the blackFoot.
The height from the table top to the bottom of the gantry is: 4.25"

Both the maximum cutting height and diameter, will be dependent on the specific end mill/router bit you plan on using, since they can vary in length.
The maximum cutting height (useful to engrave or cut material)is: with spoil-board 3.875", without a spoil-board is 4.625"
The maximum diameter will (estimated) is: 3"

Specifically dealing with our greenBull long Z-axis CNC machines, depending on how you specifically design the table you can have more cutting height and a larger diameter clearance. If you only create a frame for the machine with a hollow center(adjustable midsection), allowing you to have a greater clearance.
Similar table image here: (https://buildyourcnc.com/Item/cnc-machine-greenBull-v4-6X#prettyPhoto/5/)

• I ordered the GreenBull 5' x 10' kit. The first video for assembly shows that I should have 5 large boards that attach to the table, but I don't have those boards. Is that something I need to build or were they not shipped?

We apologize for the confusion, however in the very first video that is regarding the assembly, is of the torsion box. We do not included that in any greenBull kit, as we use too sell it individually! However due to high consumption of materials and high cost(both in shipping and for the kit itself) we have removed it from our inventory and no longer sell it.

This video can be skipped, however if you plan on making a DIY torsion box, this video will be helpful in your build!

The torsion box is not needed, as the frame itself will be more than sufficient in keeping the machine from flexing or vibrating.

• I am retrofitting two Emco f1 mills, the motor, at least on the x axis is a 83 oz/in with a 1/4" shaft, would item #291 work or could I use the red fly system?

The 3 axis electronics combo, will work with your EMCO mill as well as the redFly.
The difference between both these kits is one comes assembled while the other comes as a DIY kit. The major concern if trying to retrofit, our motors to a specific machine will be the mounting holes. Which can be found in the motors specific datasheet.

I am retrofitting two Emco f1 mills, the motor, at least on the x axis is a 83 oz/in with a 1/4" shaft, would item #291 work or could I use the red fly system?

• Can I purchase the wood pieces of the GreenBull 6x without any hardware (all gantry "Y", all "Z", and "X" chain end supports)?

That option is not a common request for our machines, we will need to contact you further with specifications on that request for the greenBull.

Email: customerservice@buildyourcnc.com

Can I purchase the wood pieces of the GreenBull 6x without any hardware (all gantry "Y", all "Z", and "X" chain end supports)?

• I would like to design my own CNC router around one of your electronics bundles, either the 3 Axis - Heavy Gantry or 3 Axis - All Large Motors. Do you have the data sheets for the motors so that I can use the dimensions in my model?

You can find the datasheets to our motors be going to the the stepping motor category page https://www.buildyourcnc.com/category/nema and selecting the motor. This will bring you to the product page for the motor and all of the motor information will be found there.

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