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Question #: 1137

Question: MDF is slightly larger then 4'. Can the Blackfoot handel sheets of MDF (3/4" x 49" x 97")?

Current Solution

The sheets of MDF (3/4" x 49" x 97") will fit in the blackFoot since the cutting surface is 4x8, but the machine itself is a bit larger. However if you were trying to cut the entire sheet(edge to edge), the gantry might not be able to reach the extra 1".

Respond:

Other Possible Solutions to this Question

  • Can the 4x8 blackfoot be outfitted with some type of reference pins?

    Our CNC Routers can be outfitted with other devices and configured in so many ways. However, I'm not familiar with reference pins. Are you referring to input for feedback?

    Customer response:
    Looking to add something like this:

    https://youtu.be/J7kcXfn0HKk

    Does the Blackfoot have a preset x and y home point so pop up pins will be accurate?

    Buildyourcnc response:
    Oh yeah. You can easily add those types of pins to any of out machines. You can even use pins for registration as well so you can machine two sides of your work-piece so the design matches.

    Click the link to respond:
    Can the 4x8 blackfoot be outfitted with some type of reference pins?

  • Is a dust extraction system included as part of the CNC kit (BlackFoot and GreenBull)?

    All our machines are implemented with a dust collection system, includes holders for vacuum hose, and a brush piece that will fit your motor mount to hold as much wood/aluminum/plexi-glass particles in as possible. No vacuum is provided, must be purchased separately.

    Click the link to respond:
    Is a dust extraction system included as part of the CNC kit (BlackFoot and GreenBull)?

  • How far does the X axis of the blackfoot travel per turn of the stepper motor ?

    The amount traveled per turn in our blackFoot, will be dependent on the steps per inch settings that you will implement to your drivers and within the software (mach3 (ex)) motor tunning: steps per inch/ 1422.22, 1/4 on your driver will give you a different distance if used as 1/2 or 1/8 etc.


    Here is a in depth tutorial on how to find the correct steps per inch for a specifications: (

    )

    Click the link to respond:
    How far does the X axis of the blackfoot travel per turn of the stepper motor ?

  • The table top pictured with the blackFoot 4'x8' v4.3 CNC Machine Kit looks nice. I'd like to build one just like it. How thick is it? If it was made from multiple sheets, how did you make the butt joints?

    The pictures of the table on the blackFoot v4.3 CNC machine page uses 2/4 studs, a torsion box, and a final top 3/4" layer.

    The torsion box and the top bed layer lays on a frame constructed by 2x4 framing studs angled to resist twisting and for greater rigidity. the joints are simply connected with long screws and you can also use framing plates/ties. The torsion box is constructed of 3/4" MOD stock and has a ribbing pattern spaced around 8 inches apart. The design is similar to this: https://www.buildyourcnc.com/ModularTorsionBoxTable.aspx

    The top later is simply multiple sheets of MOD 3/4" thick to conform to the required final measurement.

    Click the link to respond:
    The table top pictured with the blackFoot 4'x8' v4.3 CNC Machine Kit looks nice. I'd like to build one just like it. How thick is it? If it was made from multiple sheets, how did you make the butt joints?

  • do you offer just the patterns/blueprints for the Blackfoot, whereby I can make my own MDF parts for the unit, while purchasing the electronics hardware etc from you?

    I am the fellow who asked the question (#866) I just read your answer to the fellow in South Africa. I am an experienced woodworker with a very well equipped shop, and would not take your valuable time, as I understand your problem regarding the time issue. It's just that I like the aesthetics of the Blackfoot, and would like it made out of phenolic faced Baltic Birch. With your prints, I could do that and by the purchase of all the ancillary products from you, we would both win.
    thanks
    David Clark

    Additional Information:
    Hi David, Selling these very inexpensive machine kits is our bread and butter and selling, or allowing the design files/prints would undermine this idea, unfortunately. We tried this for a while and found that our sales dropped considerably. For this, and other reasons, we established a policy to keep the design files/prints to be used in-house only.

    Click the link to respond:
    do you offer just the patterns/blueprints for the Blackfoot, whereby I can make my own MDF parts for the unit, while purchasing the electronics hardware etc from you?

  • I can't spot the differences between 4'x8' blackFoot and the 4'x8' greenBull (except for laser head option): please, can you tell me?

    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/)

    Click the link to respond:
    I can't spot the differences between 4'x8' blackFoot and the 4'x8' greenBull (except for laser head option): please, can you tell me?

  • The rods in my blackFoot gantry connected to the x-axis motor are bowing or bending.

    We are using the 1/2" rods in the gantry now. You can opt to purchase 1/2" rods and new gantry sides which will accept 1/2" ID bearings.

    Click the link to respond:
    The rods in my blackFoot gantry connected to the x-axis motor are bowing or bending.

  • I just wanted to know what I can expect to pay to build the blackFoot 4'x8' CNC machine, excluding computer, software and router? Is the kit complete or do I have to purchase additional items to finish?

    You will need to build the table unit for your machine. There are instructions on how to do this at the bottom of the product page here, https://www.buildyourcnc.com/Item/cnc-machine-blackFoot-v4
    There is no estimate on how much this will cost though, since there are too many variables involved to do this.

    - PC with parallel port and USB port
    - 20awg stranded wires for the motors - http://www.buildyourcnc.com/electronicscombo.aspx
    - 18awg stranded wires for power supply to drivers
    - 24awg stranded wires for breakout board to drivers
    (location and spacing of components varies from one person to another, so we do not provide cables/wires)
    - General purpose extension cord (cut the female end off) to provide power to power supply
    - USB cable to power breakout board
    - Parallel cable to communicate to breakout board
    - Router
    - (optional - instead of router) Spindle with power inverter http://www.buildyourcnc.com/SpindlesAndAccessories.aspx
    - (if purchasing spindle with inverter) General purpose extension cord (240v) (cut the female end off) to provide power to power inverter
    - End Mill(s) http://www.buildyourcnc.com/ProductsEndMills.aspx
    - CAD, and/or CAD-CAM software (to produce geometry, machine operations, and g-code) http://www.buildyourcnc.com/CNCsoftware.aspx
    - CNC control software (to read g-code and control machine) http://www.buildyourcnc.com/CNCsoftware.aspx

    This answer is applicable to most of our machines with the exception of the greenLean and the blueChick since those machines are equipped with a table structure.

    Click the link to respond:
    I just wanted to know what I can expect to pay to build the blackFoot 4'x8' CNC machine, excluding computer, software and router? Is the kit complete or do I have to purchase additional items to finish?

  • Can I purchase plans to scratch build the Blackfoot or GreenBull machine

    Unfortunately we no longer include or sell our CNC plans for none of our machines. We will be here to assist you if any parts wear over time, and will be able to replace the parts if needed.

    Charges may be subjected due to time of purchase and cause of wear.

    Click the link to respond:
    Can I purchase plans to scratch build the Blackfoot or GreenBull machine

  • What's the size and weight of the Blackfoot shipping box or boxes ?

    When the items are placed in the shopping cart (clicking Add to Cart, or clicking on the check boxes for the base product and options on the machine page), there will be a small description of the packing dimensions and weight just under the description of the item.

    To see these dimensions and weights, just go to "Your Cart" link located at the top left corner of the webpage, the weights and dimensions for each item (i.e. blackFoot CNC Machine, or whatever else you may have in your cart) will be shown just below each item description.

    Keep in mind that the shipping prices shown are negotiated rates and not the higher retail rates.

    Click the link to respond:
    What's the size and weight of the Blackfoot shipping box or boxes ?

  • What electronics configuration is included with the blackfoot if I choose that option?

    There are three options on the blackFoot product page.

    Two options include either electronics that use the USB interface, or parallel interface. Both of these options include stepping motors (two 425 oz-in and one 651 oz-in), motor drivers (two 3.0 amp and one 6.0 amp), power supply and either a parallel breakout board, or USB breakout board. The USB interface must be used with the planet-cnc software. The parallel interface can be used in a wider variety of control software but will require a parallel port on your computer. If a parallel port doesn't exist, you can purchase a PCI parallel port adapter (for desktop computers only).

    The other option does not include electronics. This option is if you already have electronics, motors and drivers that will work with this machine, or you wish to purchase the redLeaf or redSprout assembled and plug and play CNC electronics and computer system.

    Click the link to respond:
    What electronics configuration is included with the blackfoot if I choose that option?

  • Hi is the blackfoot 8x4 cnc router sold by anyone in the UK or would I need to import it from yourself?

    We are in talks with someone in the UK on distributing our machines. I will provide further information on this FAQ when I have more information.

    Click the link to respond:
    Hi is the blackfoot 8x4 cnc router sold by anyone in the UK or would I need to import it from yourself?

  • Can you purchase the BOBCAD-CAM software alone, or in with the combination LaserCutter, or is it only available for the price listed in combination with the blackfoot CNC
  • Shop says it costs over 2000USD to ship BlackFoot to Europe, is there a cheaper option?

    Shipping rates on the website may not reflect every available option for international shipments. Please email customerservice@buildyourcnc.com to inquire about alternatives.

    Click the link to respond:
    Shop says it costs over 2000USD to ship BlackFoot to Europe, is there a cheaper option?

  • is there a DXF file for the vac brush assembly for Blackfoot 4.2

    We don't offer the dxf files for the parts of our machines; however, if you purchased this machine from us in the past, and you wish to cut this part on your machine, you can call our office and request the dxf file. We will provide an NDA for this type of transaction.

    Click the link to respond:
    is there a DXF file for the vac brush assembly for Blackfoot 4.2

  • is IT OK TO USE THICKER PLYWOOD (MATERIAL) to BUILD THE CNC MACHINE, BLACKFOOT, BLACKTOE?

    Yes, it is ok if the thickness is plus or minus +/- about 2mm.

    Click the link to respond:
    is IT OK TO USE THICKER PLYWOOD (MATERIAL) to BUILD THE CNC MACHINE, BLACKFOOT, BLACKTOE?

  • Were are the mounting locattions of the 6 Limit switches on the Blackfoot 4.3

    Here are the recommended locations for limit switches for our CNC machine kits.

    The x-axis limit switches should be located on a single gantry. This makes the wiring of the limit switches close in proximity and more manageable.
    https://www.buildyourcnc.com/images/IMG_6367-800.JPG

    The y-axis limit switches should be located at each end of the gantry. This keeps the switches stationary and impose minimal movement of the wire for better wire management.

    One end of he gantry:
    https://www.buildyourcnc.com/images/IMG_6361-800.JPG

    Other end of the gantry:
    https://www.buildyourcnc.com/images/IMG_6360-800.JPG

    Click the link to respond:
    Were are the mounting locattions of the 6 Limit switches on the Blackfoot 4.3

  • Does the MDF have to be 3/4" or can you use Thinner sheets?

    It's best to use 3/4" sheet for the scratch build machines on this site. There needs to be room on the edge of the sheet for an intersecting hole to meet the hole for the cross dowel.

    Click the link to respond:
    Does the MDF have to be 3/4" or can you use Thinner sheets?

  • Why is my 4x8 blackfoot not cutting shapes correctly. I have ran the moter test in Mach 3 and still cuts terrible

    Dealing with the machine not cutting the design you may have correctly, could be a variety of things.
    Most common, is the machine is not properly calibrated or tighten correctly (in specific areas).
    To calibrate the machine, go to the settings(alt-6) page, and click the set steps per unit(right above the reset button). You will receive a tab which asks to select the a axis, once selected it will ask how much you plan on moving. Here you will enter a value of inches/mm's. The machine will move what it thinks is the correct length and might be dead on or might be off, we recommend doing this about 2-3 times per axis, and in long distances. (ex: for the BF you may do 2-4Ft on y-axis and 5-8Ft on the x-axis)

    Make sure the v-groove bearings are tight, on the y-axis plate and z-axis, as well as the v-groove bearings on the gantry legs. (test: try moving them with your finger, if tighten correctly they will not move)
    Also having the chain too loose will not move the machine enough to create your design, the chain should have about a 1" - 1"-1/2" of slack in the middle of the table when the gantry is in either of the far ends of the table. (larger machines will have a bit more slack).

    Trying to run the machine faster then the bit can cut, or running with a old endmill/router bit.
    This is a rare occurrence but is seen, having the correct endmill, feedrate, and RPM will have a great impact on your cut. They all work together in one complete conjunction, if one is off they will all be working incorrectly.
    Each endmill will have its manufactured specifications.

    Click the link to respond:
    Why is my 4x8 blackfoot not cutting shapes correctly. I have ran the moter test in Mach 3 and still cuts terrible

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