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Question #: 543

Question: HOW DO ADDRESS THE DANGER OF THESE CNC MACHINES

Current Solution

These machines are inherently dangerous. Before the machine moves, the machine should be clear of any person by a dimension of at the distance of a persons reach plus a few more feet. This is the policies we institute in our shop and what is recommend to all of our customers. Treat these machines as you would treat any major power tool in the shop.

With that said, you can certainly add some protective parts, but still keep folks away even with those installed. I would use the gantry side to do all of the mounting of the protective parts. Consider using sheet metal that you can bend and make a simple installation right on the gantry side.

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Other Possible Solutions to this Question

  • Is it possible to integrate the shipping costs of 2 CNC machines paid separately, but same shipping address?

    We are able to work with many different options to provide solutions for our customers. Please send an email to customerservice@buildyourcnc.com for further assistance with this matter.

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    Is it possible to integrate the shipping costs of 2 CNC machines paid separately, but same shipping address?

  • HOW DO CNC MACHINES WORK?

    A CNC machine takes codes from a computer and converts the code using software into electrical signals. The signals from the computer are then used to control motors. Since the motors can turn very small amounts the machine is able to move in highly precise movements over and over again.

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    HOW DO CNC MACHINES WORK?

  • THESE MACHINES ARE DANGEROUS, WHAT DO DO?

    These machines are inherently dangerous. Before the machine moves, the machine should be clear of any person by a dimension of at the distance of a persons reach plus a few more feet. This is the policies we institute in our shop and what is recommend to all of our customers. Treat these machines as you would treat any major power tool in the shop.

    With that said, you can certainly add some protective parts, but still keep folks away even with those installed. I would use the gantry side to do all of the mounting of the protective parts. Consider using sheet metal that you can bend and make a simple installation right on the gantry side.

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    THESE MACHINES ARE DANGEROUS, WHAT DO DO?

  • Are the CNC machines covered by warranty?

    Customers have 30 calendar days from the date of delivery to return the item(s) for a full refund. The returned items must not have been used or powered in any way. The item(s) must be in its original unused condition. Send the unused item(s) to: BuildYourCNC, 20734 Settlers Lake Cir N., Katy, TX 77449 and include a letter explaining the reason you need to return the item. The original shipping is non-refundable. There is a 10% restocking fee for returned items.

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    Are the CNC machines covered by warranty?

  • 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 add information to this solution:
    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

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    WHAT IS THE PRICE OF ASSEMBLED MACHINES COMPLETE?

  • WHAT CAN CNC MACHINES DO?

    There is virtually no limit to what a CNC can do. CNC machines are responsible for almost all modern day machining operations in manufacturing industries. They normally costs tens of thousands of dollars, or hundreds of thousands of dollars. Our machines can be used to engrave plaques, cut wood for kits, mill aluminum parts, and inject plastic components. All it requires is willing to learn and understand how to use the machines to accomplish what you want to do.

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    Curved Trophy

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    WHAT CAN CNC MACHINES DO?

  • I read the book and i want the vedios show assembly the CNC Machines please give me alink for vedios

    The instructions for assembly are found in the book. If you are interested in purchasing the plans and instructional DVD please see this link https://buildyourcnc.com/cnckitintro.aspx

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    I read the book and i want the vedios show assembly the CNC Machines please give me alink for vedios

  • DO YOU HAVE BLACKTOE MACHINES WITH TABLES READY TO GO OR HOW LONG DOES IT TAKE MAKE ONE?

    Yes, we have the optional table for the blackToe, but we need to fabricate it, which only takes one day. We generally reserve one week for the total fabrication and packing of all parts.

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    DO YOU HAVE BLACKTOE MACHINES WITH TABLES READY TO GO OR HOW LONG DOES IT TAKE MAKE ONE?

  • Would any of your CNC laser machines be appropriate for welding of thermoplastic materials?

    That is a good question. We have not tried to weld thermoplastics using our CO2 Lasers. It is possible since the laser outputs a heat source and at the right intensity and speed, the thermoplastic can be heated and melted rather than instantaneously vaporized and off gassed. I have done research to see if CO2 laser can weld thermoplastics with positive results.

    Our CO2 lasers are typical of other laser cutters on the market, so if their literature, or examples you have found, successfully weld thermoplastics, then ours will probably be able to as well.

    In some cutting test with different speeds and intensities, the kerf has welded back together; however, this was caused by an unintentional process rather than an intentional one.

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    Would any of your CNC laser machines be appropriate for welding of thermoplastic materials?

  • Would any of your CNC laser machines be appropriate for welding of thermoplastic materials?

    That is a good question. We have not tried to weld thermoplastics using our CO2 Lasers. It is possible since the laser outputs a heat source and at the right intensity and speed, the thermoplastic can be heated and melted rather than instantaneously vaporized and off gassed. I have done research to see if CO2 laser can weld thermoplastics with positive results.

    Our CO2 lasers are typical of other laser cutters on the market, so if their literature, or examples you have found, successfully weld thermoplastics, then ours will probably be able to as well.

    In some cutting test with different speeds and intensities, the kerf has welded back together; however, this was caused by an unintentional process rather than an intentional one.

    Click the link to add information to this solution:
    Would any of your CNC laser machines be appropriate for welding of thermoplastic materials?

  • CAN YOUR PRODUCTS OF MACHINES BE USED TO CREATE PLASMA TABLE?

    The plasma nozzle must be close to the cutting area and you will need some way to keep the nozzle at the right level with some type of device. The spray is downward, so you will need a contained area with a sheet of water at the bottom to extinguish he spray. You should have no problem using our machines for this application since you would need to product the table bed.

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    CAN YOUR PRODUCTS OF MACHINES BE USED TO CREATE PLASMA TABLE?

  • WHAT MACHINES DO WE SELL PLANS FOR

    Yes, the CNC machine hardware and plans combo is the same machine as in the book. The machine that we provide the plans for, can be found on the website, here http://buildyourcnc.com/Item/cnc-machine-scratchbuild

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    WHAT MACHINES DO WE SELL PLANS FOR

  • WHAT LENGTHS OF ROLLER CHAIN DO I USE FOR THE GREENBULL 4X CNC?

    The roller chain lengths for the greenBull 4x is:
    - 13 feet for each side of the X axis (total of 26 feet), and
    - 6 feet for the Y-axis

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    WHAT LENGTHS OF ROLLER CHAIN DO I USE FOR THE GREENBULL 4X CNC?

  • HOW DO I DETERMINE THE AMOUNT OF SCREW WEIGTH THAT MY MOTOR CAN HANDLE

    There are two main questions that we can answer with respect to motor torque and the mechanical advantage of lead screws, 1) What torque motor do you need to lift a particular weight, or 2) What maximum weight will my motor torque be able to lift.

    This formula uses Newtons (N) as it's final unit. Use this with the included radius (R) to determine the torque. Newtons can easily be converted to lbs or ounces using online conversions.

    Effort = Sf + (Load/(2 x pi x (R/p) x Se))

    where:
    p = pitch of the screw
    Se = screw efficiency = Standard lead screw will be between 20% (.2) and 40% (.4)
    Sf = static force. This is the force that is needed to start the movement. The number may be eliminated, but it is good to use a number in the 5 N to 20 N range.
    Load = the expected load that the effort will need to carry (i.e., the router and the included axis assembly that the motor will need to lift)
    R = radius of the lead screw


    This formula is based on the "law of the machine"

    The final effort amount with its unit of newtons and R will be the torque. For example, if the effort comes to 100 N (newtons) and the R is .5 inches, then you can assume that the effort is 50 N-in since it would take twice the effort to turn form the one inch mark from the center of the shaft.

    Example:

    Load = 90 N (20.2 lbs)
    R = 1 inch since that is the length from the center of the shaft that the motor is rated
    p = 1 inch / 13 = .08 inches

    Effort = 5 N + (90 N / (2 x 3.14 x (1 / .08) x .2))
    Effort = 5 N + (90 N / (6.28 x 12.5 x .2))
    Effort = 5 N + (90 N / (15.7))
    Effort = 5 N + (5.73 N)
    Effort = 10.7 N = 2.4 lbs = 38.4 oz-in

    I am putting the oz-in on the end because the formula considers the distance from the center of the shaft to be one inch.

    Therefore, a 425 oz-in motor would be able to lift a 20.2 lb Router with its accompanying assembly. If the assembly and router is heavier, plug in the numbers and determine the effort required.

    With a bit of algebra, the formula can be rewritten to find the load:

    Load = (Effort - Sf) x (2 x pi x (R/p) x Se)

    Another formula that does not consider friction at all:

    Effort = (Load x p) / (2 x pi x R)

    Lets see if we get similar results:

    Effort = (20 lb x .08 inches) / (2 x 3.14 x 1)
    Effort = 1.6 / 6.28 = .255 lbs = 4.08 oz-in

    The results from both formulas appear to be very small because a 13 TPI screw will have enormous mechanical advantage.

    It is evident that the first formula that does consider friction that we are loosely estimating is far more conservative than the second formula. Either way, even the most conservative formula shows that the 425 oz-in motor will handle very large weights. If you are using a lead screw with only two turns per inch, .5 inch pitch, you can determine the requirements with the first formula.

    Example for a 10 TPI 5 start (2 turns per inch) lead screw:

    Load = 90 N (20.2 lbs)
    R = 1 inch since that is the length from the center of the shaft that the motor is rated
    p = 1 inch / 2 = .5 inches

    Effort = 5 N + (90 N / (2 x 3.14 x (1 / .5) x .2))
    Effort = 5 N + (90 N / (6.28 x 2 x .2))
    Effort = 5 N + (90 N / (2.512))
    Effort = 5 N + (35.83 N)
    Effort = 40.828 N = 9.18 lbs = 146.88 oz-in

    Customer Response:
    thank you so much

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    how do i calculate torque of stepper motor if lead screw coupled to motor shaft and load applied by lead screw on plate is 100 kg by vertically

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    Pls


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    1m 16mmdiameter ball screws calculations


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    What is the max load that 2 NEMA 17 stepper motors (spaced 2 feet apart, both will be pushing up on the same gantry) can lift while using a rod with the following specifications T8 OD 8mm Pitch 2mm Lead 4mm for each motor.

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    HOW DO I DETERMINE THE AMOUNT OF SCREW WEIGTH THAT MY MOTOR CAN HANDLE

  • HAVE CAD FILES (.DWG AND .DWF) FOR THE GUITARS. HOW DO LOAD THEM INTO PLANT CNC SOFTWARE USE?

    You will need a cam program to create machining operations for the geometry in the .dwg file. The CAM program outputs these machining operations into g-code for the control program (planet-cnc) to use.

    I have a couple of tutorials that explain this concept.
    http://www.buildyourcnc.com/tutorials/Tutorial-sketchup-fabrication-fabricate-cad-cam-dxf

    The following is an older video but get's the point across:
    http://www.buildyourcnc.com/process1.aspx

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    HAVE CAD FILES (.DWG AND .DWF) FOR THE GUITARS. HOW DO LOAD THEM INTO PLANT CNC SOFTWARE USE?

  • HOW DO I WIRE FROM THE BREAKOUT BOARD TO DRIVER?

    CP+ to COM
    CP- to STEP
    CP+ to CW+ (small jumper wire)
    CW- to DIR

    Additional Information:
    If the driver does not have CP or CW labels, the CP is Step and the CW is Direction or DIR. If you connect the 5v to CP+ (or Step+) and CW+ (or DIR+) and the pin to CP- (or Step-) and another pin to CW- (or DIR-), then in software, the configuration for the step on that axis must be active low. Otherwise, if you connect the GND to CP- (or Step-) and CW- (or DIR-) and the pin to CP+ (or Step+) and another pin to CW+ (or DIR+), then in software, the configuration for the step on that axis must be active high.

    Additional Information:
    If you have a driver that is labeled pul, dir and ena: Pul+ is the Step+ and Pul- is the Step-. Pul is short for pulse. A pulse will create a step. Don't worry about the enable terminals.

    On the x-axis, pin #2 can go to pul- and pin #3 can go to dir-. The 5v will go to pul+ and dir+. The configuration for each axis for step will be active low and toggle active low for the dir on each axis to make it go in the direction desired.

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    HOW DO I WIRE FROM THE BREAKOUT BOARD TO DRIVER?

  • Do you offer plans for the blackToe CNC Machine?

    The blackToe machine is offered as a kit only. We do have a machine that is build form plans. The plans refer to the scratch build machine: http://www.buildyourcnc.com/cnckitintro.aspx and the one in the book "Build Your Own CNC Machine": http://www.buildyourcnc.com/Book.aspx

    Additional Information:
    20

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    Do you offer plans for the blackToe CNC Machine?

  • Would your CNC machines be able to have an optic camera to pick up registrations marks from a printer?

    You can modify our machines to have a camera to view your process and pick up registrations.
    Here you can see a one of our customers adding a webcam to his machine! (https://www.buildyourcnc.com/tutorials/Example-customer-blacktoe-clintW)

    Click the link to add information to this solution:
    Would your CNC machines be able to have an optic camera to pick up registrations marks from a printer?

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