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Question #: 956

Question: What kind of machine is recommended for machining composites?

Current Solution

Any of our machines can cut composites. The machine selection would be the performance of cutting the composites. The greenBull will have the best performance due to it's increased rigidity. The feedrate, depth per pass and finishing passes will need to be adjusted for the machine that is being used to cut the composites. For example, the greenBull CNC machine with the 2.2 kW spindle will be able to cut deeper per pass with a faster feedrate than the blackFoot CNC machine.

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Other Possible Solutions to this Question

  • What is the recommended unit or brand of CPU cooling system for the 2.2 kw spindle on the Fabricator Pro machine

    There really isn't any specific brand. We purchase the components in a disparate fashion from China. I will product a video today that shows all of the components that we use and also offer the components on the website.

    From the upcoming video, you will be able to identify the parts is you feel you want to search for these components yourself.

    Click the link to respond:
    What is the recommended unit or brand of CPU cooling system for the 2.2 kw spindle on the Fabricator Pro machine

  • I Was wondering if the green bull cnc machine is able to cut cured composites

    You will not have a problem cutting cured composites using any of our machines. The greenBull short Z has a very rigid gantry and Z-axis assembly and can cut with better performance.

    You will need to make sure you are using the appropriate end mill for the materials within the composites. Additionally, the variables you will need to consider if the composites are thermoset or thermoplastic and the feedrate and depth per pass will need to be adjusted to make sure that the heat is is not built-up at the end mill causing the composite material to exhibit undesirable results.

    Click the link to respond:
    I Was wondering if the green bull cnc machine is able to cut cured composites

  • WHAT THE RECOMMENDED INTERVAL FOR RECEIVING INFLUENZA VACCINE AFTER AN ALLERGY INJECTION?

    Vaccines can be administered at any time before or after administration of an "allergy injection."

    Click the link to respond:
    WHAT THE RECOMMENDED INTERVAL FOR RECEIVING INFLUENZA VACCINE AFTER AN ALLERGY INJECTION?

  • WHAT IS THE LEAD TIME FOR REDFROG PICK AND PLACE MACHINE?

    You can expect a two week lead time for the redFrog pick and place machine.

    Click the link to respond:
    WHAT IS THE LEAD TIME FOR REDFROG PICK AND PLACE MACHINE?

  • WHAT KIND OF MATERIALS CAN MACHINE?

    There are almost no limits to the kind of materials you can machine. Anything from wood or plastic to exotic materials like stainless steel can be cut as long as the part can be safely and firmly held and the proper cutting tool and cutting speed are used

    Click the link to respond:
    WHAT KIND OF MATERIALS CAN MACHINE?

  • What is the z-axis travel for your largest machine?

    The largest CNC machine we make at this time (12/04/2015) is the GreenBull 6'x12' model. This model has 2 options for Z-axis travel.

    The short-z option has a total Z travel of 5.75 inches. From that you would subtract the length of the end mill used and the thickness of the spoil board to determine the maximum material thickness. (Example: If the end mill extends 1.25" from the collet and the spoil board is .75", then the material could be up to 5.75 - 1.25 - 0.75 = 3.75 inches in thickness). This is good for most sheet-type materials.

    The long-z option, used mainly for large 3D carvings, requires a custom frame and allows for up to 36" of travel.

    Click the link to respond:
    What is the z-axis travel for your largest machine?

  • Is there a recommended break in process for a 2.2kw water cooled spindle?

    A break in process, I'm guessing means if the spindle needs to be turned off for some reason? If so, then no. The water cooled spindle can be run constantly. We run our spindle for very long periods of time.

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    Is there a recommended break in process for a 2.2kw water cooled spindle?

  • What precision do the CNC machine have, for instance the 12’’ x 36’’ x 3’’?

    Our machine that matches those dimensions, the blueChick, uses roller chain for both X and Y axes, and a 1/2" 5 start 10 TPI lead screw for the Z axis. The precision is generally related to repeatability and we have not does extensive measurement of these tolerances. The resolution is set at better than 1000 steps per inch.

    Here is the link for the blueChick:
    https://www.buildyourcnc.com/blueChickVersion42CNCMachineKit.aspx

    Click the link to respond:
    What precision do the CNC machine have, for instance the 12’’ x 36’’ x 3’’?

  • 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 is the recommended firmware for the awc708c laser controller? I see this download on the Sinjoe site: AWC708 Lite Update Firmware 160901L1

    We have not had any issues with stock firmware on the AWC708lite. Upgrading the firmware will be at your own risk. We can contact our supplier and see if they can provide a suggestion for updating firmware. Contact customerservice@buildyourcnc.com to inquire with a person who can help.

    Additional Information:
    Working area setting

    Additional Information:
    Working area setting

    Click the link to respond:
    what is the recommended firmware for the awc708c laser controller? I see this download on the Sinjoe site: AWC708 Lite Update Firmware 160901L1

  • What is the footprint size of the Blacktooth laser machine?

    The footprint of the blackTooth laser machine is:
    Length: 37"/ 939.8mm
    Width: 33"-3/4"/ 857.25mm
    Height: 11"-1/8"/ 282.575mm

    The height will change with the doors that open to retrieve your material/project the highest point will be 28"-1/4"/ 717.55mm

    Additional Information:
    what is the maximum cutting depth of the blacktooth laser on plywood

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    What is the footprint size of the Blacktooth laser machine?

  • What is the price of the machines fulle assembled complete?

    Yes, we have fully assembled machines that come complete with the spindle (and laser if needed) with sizes ranging from 1'x2' all the way up to 6'x12' or longer. We can also make custom fully assembled machines with other sizes. All of these machines are perfect for very intricate detailed work including but definitely not limited to sign making, bas relief, cabinetry, architectural model making, engraving, machine parts, automotive, custom sound enclosures (automotive or other), and other scientific application which we have delivered machine for many types of these applications.

    Our machines are as follows (in order by size, larger at top):

    The Fabricator Pro (although stated on the website at 4'x8') can be provided up to a 6'x12' (or longer) size. Call us for the price above the 4'x8' size.
    https://www.buildyourcnc.com/item/cnc-machine-fabricator-pro-milling

    The greenBull 4x, 5x or 6x CNC Machine is available fully assembled; however, you are responsible for building the table on this machine, but the price is considerably lower. The 4x, 5x, and 6x is a width specification and the length is determined by your table length.
    4x: https://www.buildyourcnc.com/item/cnc-machine-greenBull-v4-4X-milling-hybrid
    5x: https://www.buildyourcnc.com/item/cnc-machine-greenBull-v4-5X-milling-hybrid
    6x: https://www.buildyourcnc.com/item/cnc-machine-greenBull-v4-6X-milling-hybrid

    The 4'x8' greenLean CNC Router (Table bed is vertically oriented with a slant) fully assembled:
    This machine is fully assembled with the overall frame. The customer would need to fasten the frame to the wall and affix a spoilboard to the bed.
    https://www.buildyourcnc.com/item/cnc-machine-greenLean-v1-milling

    The 4'x8' Vertical Laser XL Laser Cutter and Engraver fully assembled:
    https://www.buildyourcnc.com/item/cnc-machine-vertical-laser-xl-laser-cutter

    The 4'x8' blackFoot CNC Router:
    This machine requires a table to be built by the customer.
    https://www.buildyourcnc.com/item/cnc-machine-blackFoot-v4-milling

    The 2'x4' blackToe CNC router fully assembled complete with table:
    https://www.buildyourcnc.com/item/cnc-machine-blacktoe-v4-2x4-milling

    The blueChick CNC Router fully assembled completel with table:
    https://www.buildyourcnc.com/item/cnc-machine-bluechick-v4-milling

    Click the link to respond:
    What is the price of the machines fulle assembled complete?

  • WHAT ARE CURRENT RECOMMENDED IEEE EMF OCCUPATIONAL EXPOSURE LEVELS AND GUIDELINES FOR RADIO BASE STATION ANTENNAS?

    The following answer assumes "radio Base Station Antennas" refers to base stations used for personal wireless communications services such as cellular telephone, Personnel Communications Services (PCS), and Enhanced Specialized Mobile radio (ESMR). In the United States, the frequency band allocated for base stations used for personal wireless communications is 869-894 MHz for cellular service, 851-866 MHz for ESMR, and 1930-1990 MHz for PCS. The IEEE exposure limits (maximum permissible exposure—MPE) for occupational exposure (controlled environments where exposures may be incurred by persons who are aware of the potential for exposure) are frequency dependent and are expressed in terms of incident power density. The appropriate value to compare with the MPE is the incident power density averaged over the vertical cross-section of the human body. The occupational exposure limits are also time-averaged over any six-minute interval. The IEEE C95.1-1991 MPE values are shown in the table below:
    IEEE C95.1-1991 Maximum Permissible Exposure (MPE) Values
    Frequency Band Power Density
    General mw/cm2 W/cm2
    851-866 MHz f/300 mW/cm2 2.84-2.88 28.4-28.8
    869-894 MHz f/300 mW/cm2 2.90-2.98 29.0-29.8
    1930-1990 MHz f/300 mW/cm2 6.43-6.63 64.3-66.3
    NOTE: f is in MHz
    As indicated above, these values are for continuous exposure (t > 6 minutes) and are to be compared with the spatial average of the incident power density. all base stations used for personal wireless telecommunications services in the United States are required to comply with the FCC limits (as mandated by the Telecommunications Act of 1996). The FCC limits are based on a hybrid of the IEEE limits and the 1986 recommendations of the National Council on Radiation Protection and Measurements. The FCC MPEs are the same as the IEEE values for frequencies below 1500 MHz but are capped at 5 mW/cm2 (50 W/cm2) for frequencies greater than 1500 MHz.

    Both the FCC and IEEE MPEs for exposure of the public (uncontrolled environments) are one-fifth of the above values. As above, the value to compare with the MPE is the incident power density averaged over the vertical cross-section of the human body. The averaging time for the general public is 30 minutes. Thus, for transient exposures lasting six minutes or less, the MPEs for occupational exposure and exposure of the general public MPEs are the same. For cases of simultaneous exposure from antennas operating in different frequency bands, the ratio of the spatially averaged incident power density in each frequency band to the corresponding MPE for that band is determined and the sum of all such ratios must be less than unity in order to comply.

    R. C. Petersen
    Manager, Wireless and Optical
    Technologies Safety Department

    Click the link to respond:
    WHAT ARE CURRENT RECOMMENDED IEEE EMF OCCUPATIONAL EXPOSURE LEVELS AND GUIDELINES FOR RADIO BASE STATION ANTENNAS?

  • What is the best way to determine speeds and feeds for machine and bit longevity?

    The speeds and feeds are generally based on the amount of flutes that are being used per pass and how hot the end mill is getting when milling.  You want to use as much of the flutes as possible on single cuts.  Make the deepest cuts you can to increase the life of the tool.  For instance, if a tool that is 1 inch in cut length and the depth per pass is 1/4", then only that 1/4" is being used for the cutting.  The 1/4" tip of that tool will wear faster.  
    Make sure the feedrate is as fast as possible without a cost to the edge finish.  This will keep the end mill cool since there will be minimal friction as you are always cutting into fresh cooler material.  
    Use the end mill manufacturer's chip load for the tool to determine the starting feed rate.

    Feedrate (IPM - Inches/Min) = Spindle RPM x # of Flutes x Chip Load
    See each end mill for the chip load value.

    If your machine cannot achieve these feed rates, reduce the spindle RPM using this formula:
    Speed (RPM) = Feed Rate (IPM) / (# of Flutes x Chip Load)

    Click the link to respond:
    What is the best way to determine speeds and feeds for machine and bit longevity?

  • What is your shipping costs for the greenLean CNC machine to Perth Western Australia

    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.

    The shipping times are determined by the service you select in the shopping cart. If a machine is purchased, we generally have a one week lead time unless otherwise stated in the description of the machine's product page.

    Click the link to respond:
    What is your shipping costs for the greenLean CNC machine to Perth Western Australia

  • What is the price of the assembled machines complete?

    Yes, we have fully assembled machines that come complete with the spindle (and laser if needed) with sizes ranging from 1'x2' all the way up to 6'x12' or longer. We can also make custom fully assembled machines with other sizes. All of these machines are perfect for very intricate detailed work including but definitely not limited to sign making, bas relief, cabinetry, architectural model making, engraving, machine parts, automotive, custom sound enclosures (automotive or other), and other scientific application which we have delivered machine for many types of these applications.

    Our machines are as follows (in order by size, larger at top):

    The Fabricator Pro (although stated on the website at 4'x8') can be provided up to a 6'x12' (or longer) size. Call us for the price above the 4'x8' size.
    https://www.buildyourcnc.com/item/cnc-machine-fabricator-pro-milling

    The greenBull 4x, 5x or 6x CNC Machine is available fully assembled; however, you are responsible for building the table on this machine, but the price is considerably lower. The 4x, 5x, and 6x is a width specification and the length is determined by your table length.
    4x: https://www.buildyourcnc.com/item/cnc-machine-greenBull-v4-4X-milling-hybrid
    5x: https://www.buildyourcnc.com/item/cnc-machine-greenBull-v4-5X-milling-hybrid
    6x: https://www.buildyourcnc.com/item/cnc-machine-greenBull-v4-6X-milling-hybrid

    The 4'x8' greenLean CNC Router (Table bed is vertically oriented with a slant) fully assembled:
    This machine is fully assembled with the overall frame. The customer would need to fasten the frame to the wall and affix a spoilboard to the bed.
    https://www.buildyourcnc.com/item/cnc-machine-greenLean-v1-milling

    The 4'x8' Vertical Laser XL Laser Cutter and Engraver fully assembled:
    https://www.buildyourcnc.com/item/cnc-machine-vertical-laser-xl-laser-cutter

    The 4'x8' blackFoot CNC Router:
    This machine requires a table to be built by the customer.
    https://www.buildyourcnc.com/item/cnc-machine-blackFoot-v4-milling

    The 2'x4' blackToe CNC router fully assembled complete with table:
    https://www.buildyourcnc.com/item/cnc-machine-blacktoe-v4-2x4-milling

    The blueChick CNC Router fully assembled completel with table:
    https://www.buildyourcnc.com/item/cnc-machine-bluechick-v4-milling

    Click the link to respond:
    What is the price of the assembled machines complete?

  • WHAT IS THE SHIPPING COST OF MACHINE TO AUSTRALIA?

    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.

    The shipping times are determined by the service you select in the shopping cart. If a machine is purchased, we generally have a one week lead time unless otherwise stated in the description of the machine's product page.

    Click the link to respond:
    WHAT IS THE SHIPPING COST OF MACHINE TO AUSTRALIA?

  • WHAT IS THE PRICE OF ASSEMBLED MACHINES COMPLETE?

    Yes, we have fully assembled machines that come complete with the spindle (and laser if needed) with sizes ranging from 1'x2' all the way up to 6'x12' or longer. We can also make custom fully assembled machines with other sizes. All of these machines are perfect for very intricate detailed work including but definitely not limited to sign making, bas relief, cabinetry, architectural model making, engraving, machine parts, automotive, custom sound enclosures (automotive or other), and other scientific application which we have delivered machine for many types of these applications.

    Our machines are as follows (in order by size, larger at top):

    The Fabricator Pro (although stated on the website at 4'x8') can be provided up to a 6'x12' (or longer) size. Call us for the price above the 4'x8' size.
    https://www.buildyourcnc.com/item/cnc-machine-fabricator-pro-milling

    The greenBull 4x, 5x or 6x CNC Machine is available fully assembled; however, you are responsible for building the table on this machine, but the price is considerably lower. The 4x, 5x, and 6x is a width specification and the length is determined by your table length.
    4x: https://www.buildyourcnc.com/item/cnc-machine-greenBull-v4-4X-milling-hybrid
    5x: https://www.buildyourcnc.com/item/cnc-machine-greenBull-v4-5X-milling-hybrid
    6x: https://www.buildyourcnc.com/item/cnc-machine-greenBull-v4-6X-milling-hybrid

    The 4'x8' greenLean CNC Router (Table bed is vertically oriented with a slant) fully assembled:
    This machine is fully assembled with the overall frame. The customer would need to fasten the frame to the wall and affix a spoilboard to the bed.
    https://www.buildyourcnc.com/item/cnc-machine-greenLean-v1-milling

    The 4'x8' Vertical Laser XL Laser Cutter and Engraver fully assembled:
    https://www.buildyourcnc.com/item/cnc-machine-vertical-laser-xl-laser-cutter

    The 4'x8' blackFoot CNC Router:
    This machine requires a table to be built by the customer.
    https://www.buildyourcnc.com/item/cnc-machine-blackFoot-v4-milling

    The 2'x4' blackToe CNC router fully assembled complete with table:
    https://www.buildyourcnc.com/item/cnc-machine-blacktoe-v4-2x4-milling

    The blueChick CNC Router fully assembled completel with table:
    https://www.buildyourcnc.com/item/cnc-machine-bluechick-v4-milling

    Click the link to respond:
    WHAT IS THE PRICE OF ASSEMBLED MACHINES COMPLETE?

  • WHAT IS THE PRICE OF ASSEMBLED MACHINES COMPLETE?

    Yes, we have fully assembled machines that come complete with the spindle (and laser if needed) with sizes ranging from 1'x2' all the way up to 6'x12' or longer. We can also make custom fully assembled machines with other sizes. All of these machines are perfect for very intricate detailed work including but definitely not limited to sign making, bas relief, cabinetry, architectural model making, engraving, machine parts, automotive, custom sound enclosures (automotive or other), and other scientific application which we have delivered machine for many types of these applications.

    Our machines are as follows (in order by size, larger at top):

    The Fabricator Pro (although stated on the website at 4'x8') can be provided up to a 6'x12' (or longer) size. Call us for the price above the 4'x8' size.
    https://www.buildyourcnc.com/item/cnc-machine-fabricator-pro-milling

    The greenBull 4x, 5x or 6x CNC Machine is available fully assembled; however, you are responsible for building the table on this machine, but the price is considerably lower. The 4x, 5x, and 6x is a width specification and the length is determined by your table length.
    4x: https://www.buildyourcnc.com/item/cnc-machine-greenBull-v4-4X-milling-hybrid
    5x: https://www.buildyourcnc.com/item/cnc-machine-greenBull-v4-5X-milling-hybrid
    6x: https://www.buildyourcnc.com/item/cnc-machine-greenBull-v4-6X-milling-hybrid

    The 4'x8' greenLean CNC Router (Table bed is vertically oriented with a slant) fully assembled:
    This machine is fully assembled with the overall frame. The customer would need to fasten the frame to the wall and affix a spoilboard to the bed.
    https://www.buildyourcnc.com/item/cnc-machine-greenLean-v1-milling

    The 4'x8' Vertical Laser XL Laser Cutter and Engraver fully assembled:
    https://www.buildyourcnc.com/item/cnc-machine-vertical-laser-xl-laser-cutter

    The 4'x8' blackFoot CNC Router:
    This machine requires a table to be built by the customer.
    https://www.buildyourcnc.com/item/cnc-machine-blackFoot-v4-milling

    The 2'x4' blackToe CNC router fully assembled complete with table:
    https://www.buildyourcnc.com/item/cnc-machine-blacktoe-v4-2x4-milling

    The blueChick CNC Router fully assembled completel with table:
    https://www.buildyourcnc.com/item/cnc-machine-bluechick-v4-milling

    Click the link to respond:
    WHAT IS THE PRICE OF ASSEMBLED MACHINES COMPLETE?

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