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Question #: 13342

Question: Can your cnc's get within 1/10th of a human hair in accuracy while cutting?

Current Solution

Dealing with a larger offset when cutting a larger object, try calibrating your machine accordingly (

) now you will have to do the last couple of steps a few times to get your machine as accurate as possible.
Also if this does not correct your issue, try looking at the tightness of your x/y/z - axis chain, bearings, and also your sprocket/rod, the chain must be viewed as a bicycle chain if too tight it might snap when the machine moves but if to loose then it will be off. The rod is not totally flat where the set screws are suppose to hold down the rod, so sanding it to a flatter surface section might fix the offset.

Additional Information:
accuracy

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Other Possible Solutions to this Question

  • I am having trouble with my cutting precision. I can cut a 1" box within 0.005" accuracy, but when I try to cut something with a 6" profile, it cuts almost 0.125" heavy. Any help would be greatly appreciated.

    Dealing with a larger offset when cutting a larger object, try calibrating your machine accordingly (

    ) now you will have to do the last couple of steps a few times to get your machine as accurate as possible.
    Also if this does not correct your issue, try looking at the tightness of your x/y/z - axis chain, bearings, and also your sprocket/rod, the chain must be viewed as a bicycle chain if too tight it might snap when the machine moves but if to loose then it will be off. The rod is not totally flat where the set screws are suppose to hold down the rod, so sanding it to a flatter surface section might fix the offset.

    Additional Information:
    accuracy

    Click the link to respond:
    I am having trouble with my cutting precision. I can cut a 1" box within 0.005" accuracy, but when I try to cut something with a 6" profile, it cuts almost 0.125" heavy. Any help would be greatly appreciated.

  • 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?

  • Mach3 stopping while cutting, no programmed pause or stop.

    On the Mach3 main screen (program run tab), is there a status message when the Mach3 and machine stops?

    Additional Information:
    We didn't look, we don't experience a lot of problems. Are those messages stored in a cache file ?

    Additional Information:
    I don't believe there is a log associated with the status messages (in my brief research). There should be, definitely.

    Next time this happens, check out that message.

    You may find that the limit switch was triggered from some interference from the motors or other EMF source. If that is the case, then you will need to do the following:
    - Use shielded cable for the limit swtches
    - Reorganize the limit switch cables far away from the motor cables
    - Adjust the debounce parameter for the limit switches within Mach3

    Additional Information:
    I am embarrassed to say we don't have limit switches installed. It does share power with other machines, like a table saw and a big dust collector.

    Additional Information:
    Well, for personal safety, the machine will not be able to break through the extents of the machine, so you are fine.

    The limit switch triggering is the only thing I can think of that would stop Mach3. I would love to know the status message when it happens again. Just for fun, check the inputs section of the "ports and pins" dialog and make sure all of the inputs (that you are not using) are disabled, so they don't act as antennae.



    Additional Information:
    Will do, thank you very much.

    Additional Information:
    You are very welcome and thanks for using this customer service section so this question can help others too.

    Click the link to respond:
    Mach3 stopping while cutting, no programmed pause or stop.

  • Where is the best place to see projects made with BuildYourCNC CNCs? I would like to get an idea of carving capabilities and cutting Baltic Birch plywood. Thanks.

    You can always come to our offices in Katy TX. If that is not an option, we can do cut in our shop and record video for you. Specify what you would like to cut and we can consider doing this for you.

    Thanks. I've reviewed the gallery and think my question comes down to this- Can I do hardwood carving like Mike M.'s guitar display cases and cut 3/4 inch baltic birch plywood with the same machine?

    Absolutely, the cutting and machining is more a function of how the machining operations are created and specified. Baltic birch is not a tough material and you will be able to cut very aggressively with any of our machine kits.

    Click the link to respond:
    Where is the best place to see projects made with BuildYourCNC CNCs? I would like to get an idea of carving capabilities and cutting Baltic Birch plywood. Thanks.

  • I can't get any of the original build your cnc videos to load past step 5. Can anyone help please?

    Which machine has the issue with the videos?

    Click the link to respond:
    I can't get any of the original build your cnc videos to load past step 5. Can anyone help please?

  • What is the cut accuracy of the large format routers using roller chain? .005"?

    Accuracy is generally function of how well the machine will match the measurements of what is designed on a computer on a computer. However, if you are looking for the resolution of the machine, you can calculate the steps per inch using the formula:
    Steps / inch
    = ((motor steps) * (micro steps)) / ((tooth pitch) * (number of teeth))

    Depending on the micro steps and the drive sprocket (or drive pulley) you are using, you can achieve a wide range of resolutions.

    With our machines, you can easily achieve .001 resolution, but accuracy will be best achieved with proper calibration.

    Click the link to respond:
    What is the cut accuracy of the large format routers using roller chain? .005"?

  • How small of end mills are commonly used for cutting balsa? What thickness of balsa can these smaller mills handle?

    The size of end mills can vary to extremely tiny to very large cutting diameters. The smaller the cutting diameters, the shorter the available cutting length due to the possibility of breakage. You will first need to determine the thickness, or depth you will need to cut and find the available cut diameters for that depth.

    To cut balsa wood, almost any standard 1 to 4 flute end mill will be fine that are intended to be used with wood. The end mill will state the materials that it can cut. Wood end mills will exhibit a flute geometry that is more stretched out to straight.

    Click the link to respond:
    How small of end mills are commonly used for cutting balsa? What thickness of balsa can these smaller mills handle?

  • 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?

  • Can I attach a 400w CO2 laser tube to you units (for cutting Stainless Steel at 1/8") ?

    A 400w laser tube will not be a simple swap of our laser tube in our blackTooth or our spindle/laser hybrid. The overall size factor of a 80w - 400w is greatly larger than our 40w laser tube and will be the biggest issue. You will have to completely modify our units to retrofit a larger tube, which might be more costly than expected as well as more time consuming.

    Click the link to respond:
    Can I attach a 400w CO2 laser tube to you units (for cutting Stainless Steel at 1/8") ?

  • Hi Can you supply a "Kit" of CAD drawings to make your Bluechick 4.2 router?

    Our main machines, other than our scratch build machine is not offered as a plans option.

    Click the link to respond:
    Hi Can you supply a "Kit" of CAD drawings to make your Bluechick 4.2 router?

  • Please can you suggest which cutting machine is very suitable to cut vehicle tires of any thickness precisely and neat, thanks

    Any of our machines can cut or mill tire material. What you need to consider is the machine size (will the tire fit in the machine with the proper modifications to the table) and the milling tool (end mill) used to mill or cut the tire material. The end mill will need to be specifically designed to mill the volcanized rubber material and the steel belts embedded within the tire.

    Additional Information:


    Additional Information:


    Additional Information:
    Can we arrange for a specific modification of cutting the you're like you suggested... The aim is to cut the tires into specified shapes( circular, rectangular or squares) with neat edges. Also would ave the modifications made in other to be able to cut the width of the tires into two there by expising the metal strings in the tires
    Please let me know if you get the idea and your take on the modification you think would suffice..
    Thanks.
    Femi

    Additional Information:
    Can we arrange for a specific modification of cutting the you're like you suggested... The aim is to cut the tires into specified shapes( circular, rectangular or squares) with neat edges. Also would ave the modifications made in other to be able to cut the width of the tires into two there by expising the metal strings in the tires
    Please let me know if you get the idea and your take on the modification you think would suffice..
    Thanks.
    Femi

    Click the link to respond:
    Please can you suggest which cutting machine is very suitable to cut vehicle tires of any thickness precisely and neat, thanks

  • Please can you suggest which cutting machine is very suitable to cut vehicle tires of any thickness precisely and neat, thanks

    Any of our machines can cut or mill tire material. What you need to consider is the machine size (will the tire fit in the machine with the proper modifications to the table) and the milling tool (end mill) used to mill or cut the tire material. The end mill will need to be specifically designed to mill the volcanized rubber material and the steel belts embedded within the tire.

    Additional Information:


    Additional Information:


    Additional Information:
    Can we arrange for a specific modification of cutting the you're like you suggested... The aim is to cut the tires into specified shapes( circular, rectangular or squares) with neat edges. Also would ave the modifications made in other to be able to cut the width of the tires into two there by expising the metal strings in the tires
    Please let me know if you get the idea and your take on the modification you think would suffice..
    Thanks.
    Femi

    Additional Information:
    Can we arrange for a specific modification of cutting the you're like you suggested... The aim is to cut the tires into specified shapes( circular, rectangular or squares) with neat edges. Also would ave the modifications made in other to be able to cut the width of the tires into two there by expising the metal strings in the tires
    Please let me know if you get the idea and your take on the modification you think would suffice..
    Thanks.
    Femi

    Click the link to respond:
    Please can you suggest which cutting machine is very suitable to cut vehicle tires of any thickness precisely and neat, thanks

  • So the only way to get one of your machines is to buy it already cut, and/or assembled? I can't cut one on my existing machine?

    That is correct, the only manner to get our machines is to buy one of our kits. We do not provide or sell our plans, the only CNC machine you can find on our website will be the scratch build kit and plans which is a 20' x 40' , (https://buildyourcnc.com/Documents/CNC%20Kit%201-1.pdf).

    Click the link to respond:
    So the only way to get one of your machines is to buy it already cut, and/or assembled? I can't cut one on my existing machine?

  • Is the Greenlean capable of cutting soft metals like aluminum or brass? Thanks

    Yes, the greenLean can cut metals such as aluminum and brass. The gantry and Y carriage was designed to be rigid enough to handle these types of metals. The typical metal cutting techniques should be used, such as high feedrates to reduce heat buildup at the end mill, or the use of cutting fluids or cold air used at the end mill as is necessary with most machines that cut similar metals. This is necessary since the aluminum has a rather low melting point and can clog the end mill.

    Additional Information:
    All of our machines are capable of cutting many metals, including steel and aluminum as long as the proper CNC machining operations are used like light fast passes, and if desired, using air cooling for better performance.

    Here is a video of one of our customer demonstrating aluminum cutting using air to cool the end mill.
    https://www.buildyourcnc.com/tutorials/tutorial-milling-cutting-metal-blacktoe-mark-gottschalk

    Additional Information:
    how do I hold down material on a greenlean

    Click the link to respond:
    Is the Greenlean capable of cutting soft metals like aluminum or brass? Thanks

  • Can a sample be sent and or brought to you for confirmation of the end results when cutting carpet tile and or hard surface tile?

    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:
    Can a sample be sent and or brought to you for confirmation of the end results when cutting carpet tile and or hard surface tile?

  • Using your NEMA 24 stepping motor with microstepping, can I get a speed range from 3 RPM to 600 RPM ?
  • If I am cutting 18mm MDF with 6mm cutting bit (so 6mm pass), what can be the maximum speed rate of cutting and spindle speed of router?

    The best way to determine the cutting speed is to determine this with respect to the edge quality you desire. This recommendation generally comes from the major end mill manufacturers.

    The feedrate (travel speed) should be determined by the chip load of the end mill, the number of flutes, material of the end mill (Solid Carbide, HSS - High Speed Steel, Cobalt, etc.) and the RPM of the spindle. You will need to see the manufacturer's specifications of the end mill to determine this information.

    Formula:
    Chip Load = (feed rate IPM)/(Spindle RPM x Number of Flutes)

    or

    Feed Rate IPM = Chip Load x Spindle RPM x Number of Flutes

    Once you find this information, apply this to the material at the full depth of the end mill. If you find that your edge condition is aberrant, pull back on either the speed, or the depth per pass. If the edge condition is acceptable, then push the speed higher until the edge condition starts to deteriorate in quality and then pull back to the accepted level.

    Using this method, you will be able to reduce the wear on the end mil which will be the most expensive consumable on the machine.

    Additional Information:

    Click the link to respond:
    If I am cutting 18mm MDF with 6mm cutting bit (so 6mm pass), what can be the maximum speed rate of cutting and spindle speed of router?

  • Just purchased the book "Build Your Own CNC Machine". Can I get hardware and electronics kits and how?

    The electronics (stepper motors, drivers, power supply and interface board) can be found here:
    https://www.buildyourcnc.com/item/electronicsAndMotors-3axis-425-elcombo

    If your computer cannot connect to the parallel breakout board (the interface card), just make sure to inform us that you need the USB alternative.

    Click the link to respond:
    Just purchased the book "Build Your Own CNC Machine". Can I get hardware and electronics kits and how?

  • can I control the speed of a 2.2 spindle through your 5 axis breakout board with relay?

    Yes, you can control the speed of the 2.2 kW spindle, and the other spindles we sell, through Mach3 software. It requires making some changes to the settings in Mach3 and in your inverter. It also requires an additional part, which is called a USB to Serial Converter, found on our site here:

    https://www.buildyourcnc.com/item/Interfaces-newbiehack-Interfaces-TTL232R-USB-UART-Serial

    I have some additional instructions, that I will send upon request, by email. I will also be adding a complete tutorial and video, to the website, on how to do this soon.

    Additional Information:
    20

    Click the link to respond:
    can I control the speed of a 2.2 spindle through your 5 axis breakout board with relay?

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