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Question #: 7997

Question: How would you recommend cutting glass with a GreenBull?

Current Solution

It depends on the type of cut you're trying to make and the type of glass. In general, straight cuts can be made by scoring the glass using a type of engraving bit, such as these:
http://www.widgetworksunlimited.com/CNC_Specialty_Bits_s/33.htm.

Complex curves and thicker glass is usually tackled with a diamond burr endmill and a specialized jig. Here is a nicely done you tube video giving an idea of how that works.

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Other Possible Solutions to this Question

  • Can I run your greenBull CNC off of a generator? If so, what specs would you recommend? Thanks!

    If you want to run a greenBull CNC machine using a generator, The generator will need to allow for a minimum amount of current draw. Here is a list of items that draw current and how much current (the list does not include the laser option):

    Spindle: 10 amps minimum so plan for more.
    The power supply for three motors and drivers: 9 amps
    The computer to run the control software: varies but out redleaf system would be a max of 2 or so.

    So you are looking at about 21 minimum so you will probably need a 25 amp generator.

    Click the link to respond:
    Can I run your greenBull CNC off of a generator? If so, what specs would you recommend? Thanks!

  • Whats the maximum recommended speed to lase (engraving not cutting) a shape (say triangle) using the greenBull hybrid?

    The feedrate at which to engrave using a CO2 laser will depend on the material, depth of engraving and intensity of the laser output. For instance, if engraving plastic, you can run the machine at a very high feedrate (i.e. 100-500 ipm) and a very low intensity. In converse, anodized aluminum will require high intensity and moderate feedrate. Engraving woods will require fast or slow feedrate and high or low laser intensity depending on the result desired.

    With the greenBull, be careful with changes in direction at high feedrates as there is a very high amount of inertia with all of the components on the gantry. It is good to test raster vs. vector for some engraving patterns.

    Additional Information:
    I should have specified my exact question better. Sorry. Where you say "be careful with changes in direction at high feedrates as there is a very high amount of inertia", what is the maximum allowed acceleration (conversely deceleration) you recommend using.

    Click the link to respond:
    Whats the maximum recommended speed to lase (engraving not cutting) a shape (say triangle) using the greenBull hybrid?

  • Which machine would you recommend for cutting fine elastic fabrics (natural fibre and synthetic fibre)? How do the cut edge look like (brown / melted / elastic / unelastic)?

    I would recommend using the laser to cut many types of fabrics. The condition of the burned edge will depend on the material being cut. If the material is a synthetic material, it may melt and fuse, which in most cases is a good thing. Some materials, if the laser is burning on the edge for too long, then the material will start to burn and vaporize the material. Quick passes with less intensity works well with fabrics so this undesirable condition does not happen.

    Click the link to respond:
    Which machine would you recommend for cutting fine elastic fabrics (natural fibre and synthetic fibre)? How do the cut edge look like (brown / melted / elastic / unelastic)?

  • For cutting with the BlackTooth, what is the best type of clear plastic/acrylic to use, and can you recommend a source?

    The blackTooth will cut acrylic very easily. The type of acrylic (cast or extruded) is not important since the acrylic itself has 100% absorption with CO2 lasers. Any plastic retailer, even the home improvements stores will have sheets of acrylic.

    Avoid using plastics that will off-gas toxic and corrosive fumes. One example is PVC which is Polyvinyl Chloride. The burning of that material will exhaust chloride into the air and combine with the hydrogen in the air causing a chemical reaction yielding hydrochloric acid which is corrosive and highly toxic to humans.

    Always read the MSDS (Material Safety Data Sheet) for any material that you intend to burn with the CO2 laser.

    Click the link to respond:
    For cutting with the BlackTooth, what is the best type of clear plastic/acrylic to use, and can you recommend a source?

  • Would your greenBull 6X CNC machine be suitable for cutting 2024T3 aircraft aluminium? Working on a kitlpane project and I need this capability.

    the greenBull can handle cutting aluminum as long as the correct bit (end mill) is used and the bit is cooled frequently to prevent chips from melting and causing damage to the bit or warping the material.

    Click the link to respond:
    Would your greenBull 6X CNC machine be suitable for cutting 2024T3 aircraft aluminium? Working on a kitlpane project and I need this capability.

  • All of the pics and videos show your cncs cutting sheet materials, I'm interested in carving 3d images in plastic and hardwood slabs up to 2" thick. What machine and software would you recommend?

    All of our CNC machines can carve at that depth without a problem and do 3d carving. Our typical application is cutting sheet materials, but a good percentage of our customers cut 3D bas reliefs or even more complex 3D objects using reference points and jigs.

    Most of our CNC machines have a Z travel of at least 6 inches for the smaller machines and 7 to 10 inches for our larger machines. The Fabricator Pro has a Z travel of 10 inches.

    Depending on your application, you will need to consider the length of the end mill (more than the deepest depth of the 3D carving) and the stock that you will be using. If the stock plus the length of the end mill exceed the clearance with the Z axis raised to the top extent, then you will need to consider the way the table/bed of the machine is formed (maybe with a depression to take advantage of the greater need for clearance).

    The greenBull has the capability of Z axis travel of up to 36 inches, but I would recommend, if milling wood, that the Z-axis not extend more than 12 inches to reduce deflection.

    Additional Information:
    Most of the CAM software on the market will have 3D profile machining operation capabilities. CAMBAM has a very nice 3D prpfiling feature. The Vectric line of software can definitely handle this as well.

    Click the link to respond:
    All of the pics and videos show your cncs cutting sheet materials, I'm interested in carving 3d images in plastic and hardwood slabs up to 2" thick. What machine and software would you recommend?

  • I have an emco vmc 100 mill with a rotary head tool changer I would like to use existing stepper motors do you have a kit you would recommend?

    We currently do not have an available kits for adapting other versions of electronics (motors) to our drivers, other than our complete kits including our steppers.

    For further custom related kits or requests please contact us: customerservice@buildyourcnc.com

    Click the link to respond:
    I have an emco vmc 100 mill with a rotary head tool changer I would like to use existing stepper motors do you have a kit you would recommend?

  • CAN YOU RECOMMEND WHICH CNC MACHINE TO GO WITH FOR CUTTING MELAMINE AND MAKING KITCHEN DOORS FROM MDF. ALSO DO PROVIDE TRAINING ON OPERATING SETTING UP SHOP PRODUCTION USE? THANKS
  • The Mach 3 usb board requires an additional 12V power supply. How many amps would you recommend? Would a 1A wall adapter suffice.

    If you are using a spindle with a VFD, there is a 24 volt power supply that will provide the correct power for the V+ and V- on the Mach3 USB. The 12V option is only if you are using the limit switches on that side of the board, but if you are using it to control spindle speed and for the outputs, it's best to use a 24V power supply, or the 24V output on the VFD.

    Additional Information:
    Closed loop

    Click the link to respond:
    The Mach 3 usb board requires an additional 12V power supply. How many amps would you recommend? Would a 1A wall adapter suffice.

  • Can you recommend any handwheels known to work with your USB BOB?

    Sure, here is our recommended handwheels for the CNC Control Boards we sell. For the parallel breakout boards, skip to the handwheels that don't connect to the control board.

    Corded Handwheels that can be wired to control boards (Direct Amazon Links):
    http://amzn.to/2v4WhIe
    http://amzn.to/2vq0Aiv

    Handwheels that do not connect directly to the control board (connect to the computer's USB):
    (Wireless) http://amzn.to/2v6RB32
    (Wired) http://amzn.to/2ucfAAz

    Click the link to respond:
    Can you recommend any handwheels known to work with your USB BOB?

  • Will your system, Greenbull 6x, run without modification WinCNC software?

    Yes, absolutely! Our machines use industry standard drivers. The WinCNC offers a control interface that plugs directly into the computer motherboard that will output standard step pulses to be delivered to industry standard drivers such as ours.

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    Will your system, Greenbull 6x, run without modification WinCNC software?

  • While motor tuning what are the recommended steps per inch, velocity, and acceleration for the GreenBull CNC?

    In the customer service live, just enter "motor tuning" and it will give you a list of all the recommended or default settings for our machines. However the acceleration and velocity for the greenBull(other machines) will be an actual determination on your trials. You will want the highest possible acceleration and velocity without the motors stalling, so you can do increments of ten to be on the safe side, if it is too slow try increments of 25.

    The steps per inch is dependent on the microstepping:
    Steps/Inch for the x and y
    Steps = 200 motor steps per revolution x 16 microsteps = 3200 steps
    Inches = sprocket number of teeth x pitch of the sprocket = 14 x .25" = 3.5 inches
    steps/inch = 3200 / 3.5 = 914.28
    This is really a starting point. You will then need to use the mach3 calibration function to get the perfect steps/inch value. Use as long a measurement as possible when calibrating.

    Velocity:
    Start with a value of 1000 ipm. Increase this value with a relatively low acceleration at about 10. You will notice at a particular velocity that it will stall. This is your stall velocity. I would take the stall velocity and reduce it by about 30% to 50% which should give you a good final safe velocity.

    Acceleration:
    Once the velocity is found, raise the acceleration until it start to stall at a low velocity. Reduce the acceleration by about the same percentage to stick with a safe acceleration.

    The acceleration is mostly dependent on torque (current) and the top speed is dependent on the amount of voltage.

    Give some tests with all of the axes running at the same time. If you notice and stalling, reduce velocities and acceleration depending on when the stall happens (top end, or acceleration curve).


    X-axis
    “CW8060 (6.0A) Driver”
    Set to 5.43A, 1/16 Microstep
    Dipswitches: 01100110 (“0”=down, “1”=up)
    Mach3 Motor Tuning: 914.29 steps/in
    Y-axis
    “CW8060 (6.0A) Driver”
    Set to 5.43A, 1/16 Microstep
    Dipswitches: 01100110
    Mach3 Motor Tuning: 914.29 steps/in
    Z-axis
    “CW8060 (6.0A) Driver”
    Set to 5.43A, 1/4 Microstep
    Dipswitches: 01100100
    Mach3 Motor Tuning: 1600 steps/in

    Additional Information:


    Additional Information:


    Additional Information:
    4th axis


    Additional Information:

    Click the link to respond:
    While motor tuning what are the recommended steps per inch, velocity, and acceleration for the GreenBull CNC?

  • What would be your recommendation for "power supply 2 (24vdc)" connecting to USB motion card?

    A 24V connection to the USB motion card is only needed if you are using limit switches (inputs), powering the spindle/VFD speed and direction, and for the outputs, for powering other devices (mist, coolant, etc.).

    If you are using a VFD (Variable Frequency Drive, also called Inverter) for a spindle, they typically have a 24V out terminal that can be used with our USB motion card. If you are not using a spindle/VFD (we highly recommend one), then you will need to purchase a 24v power supply to power that side of the board.

    The outputs mentioned above are to connect to external devices and will require a relay (a mechanical switch that is controlled by a digital signal). This mechanical switch can turn on a device like coolant and mist, or even a router, if you are using one. A relay is required to turn on these devices because the devices are typically higher voltage, like mains (110v or 220v). So, a relay can turn on or off a high voltage device with a lower voltage (24v) signal.

    Click the link to respond:
    What would be your recommendation for "power supply 2 (24vdc)" connecting to USB motion card?

  • Would any of your kits be appropriate for cutting brass type?

    Really, any of our CNC machines can cut brass.

    Click the link to respond:
    Would any of your kits be appropriate for cutting brass type?

  • Can you recommend which CNC machine to go with for cutting melamine and making kitchen doors from MDF. Also do you provide training on operating and setting up machine for shop production use? Thanks
  • WE'RE GLAD THAT CDC HAS MADE A UNIVERSAL INFLUENZA VACCINATION RECOMMENDATION TO VACCINATE EVERYONE 6 MONTHS AND OLDER. WOULD YOU TELL US HOW THIS CAME ABOUT?

    Prior to the 2010-11 vaccination season, only children ages 6 months through 18 years and adults age 50 years and older were universally recommended for vaccination; recommendations for adults ages 19 through 49 years were targeted to people with specific risk factors, although other adults could be vaccinated if they wanted protection. Collectively, these targeted risk groups made up 85% of the U.S. population. During the 2009 H1N1 outbreak, additional risk groups were identified, such as obese individuals. The recommendation made by ACIP in February 2010 for universal vaccination simplifies previous recommendations, making it easier for healthcare providers to determine whom to vaccinate. The universal recommendation also makes it easier for patients to remember to get vaccinated every year.

    Click the link to respond:
    WE'RE GLAD THAT CDC HAS MADE A UNIVERSAL INFLUENZA VACCINATION RECOMMENDATION TO VACCINATE EVERYONE 6 MONTHS AND OLDER. WOULD YOU TELL US HOW THIS CAME ABOUT?

  • If I use your greenBull CNC with 110 instead of 220, am I taking a reduction in functionality?

    No, the greenBull CNC will function with the same performance in 110 or 220 volts. When the voltage changes, the current compensates for the different voltage. Make sure to select the appropriate products for the voltage. If the product does in list the voltage, make sure to give us a cal to inform us so we can supply the correct components in the package for shipping.

    Click the link to respond:
    If I use your greenBull CNC with 110 instead of 220, am I taking a reduction in functionality?

  • Have you guys ever shipped a Greenbull to Brazil? Do you know how can it be done?

    You can determine if the country is serviceable by:
    - selecting the items you want to purchase on the website
    - go to the cart (shopping cart top left of any webpage)
    - log in, or register
    - Enter the address and click on calculate shipping.

    The webpage will return the direct rates and whether your area is serviced or not. Feel free to enter any address as long as you are able to receive the package from that address.

    Additional Information:
    I did that and got two options: UPS ($1400) or FEDEX ($3800). Maybe FEDEX is already including the customs fees and import taxes, I don't know. I am afraid of buying it and having problems with customs later. That is why I asked if you guys have ever sent any machine to Brazil just to check if everything went fine with customs.

    Click the link to respond:
    Have you guys ever shipped a Greenbull to Brazil? Do you know how can it be done?

  • Is there a recommended cooling system for purchase that can be used with your 2.2 kW water cooled spindles?

    A standard water pump like this one will work: https://www.buildyourcnc.com/item/pneumatic-hydraulic-water-pump-370-Gallons-Per-Hour-220v-110v

    You will also need silicone tubing at 1/4" ID and 3/8" OD to connect from the pump to the spindle: https://www.buildyourcnc.com/Item/pneumatic-hydraulic-silicone-tubing

    And a bucket to hold the water.

    You may also consider CPU cooling systems which can actually be fastened to the back of the gantry. We do this for the Fabricator Pro machine. The CPU cooling I would recommend is a small pump and cylinder with a heat sink, or a small radiator.

    Click the link to respond:
    Is there a recommended cooling system for purchase that can be used with your 2.2 kW water cooled spindles?

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