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Question #: 13290

Question: accuracy and repeatability

Current Solution

Repeatability is very good for these machines and can be as low as .001" depending on the way you control the machine. If you use the spindle, you can be moderately aggressive, but you will want to use a finishing pass to make sure the edges are exactly what you would expect. since this is a kit, there will be varying levels of repeatibility depending on how well the kit is assembled and maintained. Calibration, as with all machines, is a critical aspect of keeping repeatibility over time.

Timing belts and chain are about the same when it comes to precision as long as the chain wraps most of the drive sprocket. There are differences to each of these systems as Kevlar with steel cables impregnated within the Kevlar and the steel used in roller chain have different coefficients of linear expansion (the expansion and contraction over temperature change), and roller chain may stretch over time, so it is important to maintain the machine by tensioning the chain and timing belt, and calibrating the machine over time and when the temperature changes significantly.

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Other Possible Solutions to this Question

  • What resolution and level of repeatability can one usually expect from a kit-built cnc?

    Repeatability is very good for these machines and can be as low as .001" depending on the way you control the machine. If you use the spindle, you can be moderately aggressive, but you will want to use a finishing pass to make sure the edges are exactly what you would expect. since this is a kit, there will be varying levels of repeatibility depending on how well the kit is assembled and maintained. Calibration, as with all machines, is a critical aspect of keeping repeatibility over time.

    Timing belts and chain are about the same when it comes to precision as long as the chain wraps most of the drive sprocket. There are differences to each of these systems as Kevlar with steel cables impregnated within the Kevlar and the steel used in roller chain have different coefficients of linear expansion (the expansion and contraction over temperature change), and roller chain may stretch over time, so it is important to maintain the machine by tensioning the chain and timing belt, and calibrating the machine over time and when the temperature changes significantly.

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    What resolution and level of repeatability can one usually expect from a kit-built cnc?

  • What resolution and level of repeatability can one usually expect from a kit-built cnc, and is there a significant difference between timing belt and chain drive systems?

    Repeatability is very good for these machines and can be as low as .001" depending on the way you control the machine. If you use the spindle, you can be moderately aggressive, but you will want to use a finishing pass to make sure the edges are exactly what you would expect. since this is a kit, there will be varying levels of repeatibility depending on how well the kit is assembled and maintained. Calibration, as with all machines, is a critical aspect of keeping repeatibility over time.

    Timing belts and chain are about the same when it comes to precision as long as the chain wraps most of the drive sprocket. There are differences to each of these systems as Kevlar with steel cables impregnated within the Kevlar and the steel used in roller chain have different coefficients of linear expansion (the expansion and contraction over temperature change), and roller chain may stretch over time, so it is important to maintain the machine by tensioning the chain and timing belt, and calibrating the machine over time and when the temperature changes significantly.

    Click the link to respond:
    What resolution and level of repeatability can one usually expect from a kit-built cnc, and is there a significant difference between timing belt and chain drive systems?

  • Is there any precision or accuracy difference between the vertical and blacktooth lasers?

    I will address the two separately (precision and accuracy):

    Precision (repeatability):
    This is most closely related to the resolution. The blackTooth uses the same mechanical drive (timing belts and pulley) of the same ratios and specifications, so the two machines will be the same in this respect.

    Accuracy:

    The output of the machine (the final physical work) matching the input given to the machine (the design data or instructions for the machine to product the physical work. This has to do with both resolution and how well the machine will hold up over time and through environmental changes.

    With that said, both machines have very similar attributes in mechanics and structure. The overall structure is made of MDO (Medium Density Overlay) and has a very low coefficient of linear expansion with regards to temperature change, so accuracy will not be affected in any appreciable manner over time with the two machines. The Vertical Laser XL does use more industry standard rails to hold the heavy gantry, but this will be differ appreciably since the blackTooth will exhibit rigidity by virtue of its size.

    It really is best to consider the application and size as the main aspects of deciding between these two machines.

    Hope this helps.


    Additional Information:
    We're looking at getting the vertical so we can run both large and small jobs on the same machine. It sounds like running a small job on the vertical (using a positioning jig) would provide results at least as
    good as running the same job on the blacktooth. Does this sound about right?

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    Is there any precision or accuracy difference between the vertical and blacktooth lasers?

  • If I wanted to use the blueChick for isolation routing, what accuracy could I expect from v3.0 and v4.2?

    The blueChick v4.2, is accurate at 1000's of an inch, with the roller chain, the v3.0 with the timing belt will increase the accuracy by 5%-10%, but to the expense of structural integrity.

    Additional Information:

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    If I wanted to use the blueChick for isolation routing, what accuracy could I expect from v3.0 and v4.2?

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

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

  • 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.

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

  • CELL PHONES AND GAS STATIONS

    I can't think of any reason that it would be dangerous. However, I checked with the Cellular Telecommunications Industry Association. The Chairman of the Association sent the following memo on 18 June 1999, to the Associations' Board of Directors and others:
    "You may have received inquiries about wireless phones causing fires or explosions at gas stations. In particular, you may have been asked about an alleged explosion at a gas station in Indonesia. We have been unable to verify any such occurrence in Indonesia or anywhere else. Moreover, in our discussions with Shell Oil they have stated they have attempted to verify these reports and also have not been able to document any such occurrence."
    Nonetheless, in an abundance of caution, some manufacturers have included language in the owner's manuals for their products that recommends wireless phone users turn off their phones while at refueling points (gas stations). In addition, we have received information that Exxon will begin issuing warning signs at all domestic gas stations advising drivers to turn off all wireless communications devices when entering Exxon gas stations.

    While wireless phone owners should always consult their owner's manual for information on the use of the phone, we are not aware of any incident that would justify these concerns."

    Gen Roessler, Editor
    HPS website

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    CELL PHONES AND GAS STATIONS

  • Do you ship to New Zealand ?

    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.

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    Do you ship to New Zealand ?

  • WHAT DOES FFC STANDS FOR

    FFC stands for Film Finance Corporation

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    WHAT DOES FFC STANDS FOR

  • When will Andre pay for his items?

    Try slowing your feedrate down and increasing spindle RPMs. End-mills will leave a poor finish if you go too fast. Make sure your cutting depth isn't too much. Maybe the endmill or cutter is blunt? Could it be the feed direction of the cutter? Some materials need to be fed in a certain direction.

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    When will Andre pay for his items?

  • When will Andre pay for his items?

    tomorrow

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    When will Andre pay for his items?

  • When will Andre pay for his items?

    tomorrow

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    When will Andre pay for his items?

  • Do you ship laser tubes to Ireland

    Yes, I believe we can ship laser tubes to Ireland.

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    Do you ship laser tubes to Ireland

  • vfd and spindle error codes listing

    Remember, steps to correct and troubleshoot issues with any electrical devices should be done by a professional electrician.

    If you have an HY series VFD, the fault codes are below:

    OC-1: Over-current during ramp up or over-current at constant speed.
    Recommended actions: 1, 2, 3, 4

    OC-1: Over-current during ramp up or over-current at constant speed.
    Recommended actions: 1, 2, 5, 6

    OC-2: Over-current at deceleration or over-current at stop.
    Recommended actions: 1, 7, 2, 9, 10

    dL: Output short circuit.
    Recommended actions: 11, 1, 10

    Ou-1 or 2: Over-voltage at stop, over-voltage at acceleration, over-voltage at constant speed or over-voltage at deceleration
    Recommended actions: 12, 13

    Fb: Fuse break.
    Recommended actions: 14, 10

    Lu: Low voltage.
    Recommended actions: 15, 16, 17

    OH: Over heat of inverter.
    Recommended actions: 18, 19, 20

    OL-1: Inverter overload 150% per minute
    Recommended actions: 2, 21, 22

    OL-2: Motor overload 150% per minute.
    Recommended actions: 21, 23, 24, 25, 26, 21

    dT: Motor over-torque
    Recommended actions: 21, 23

    E.b.S.A or E.b.S.n or E.b.S.d or E.b.S.S: No feedback from the auxiliary coil or the lectromagnetic contactor
    Recommended action: 27

    bt: Braking transistor damage.
    Recommended action: 27

    CPu: CPU fault.
    Recommended action: 27

    E.E.E.S or E.E.E.n or E.E.E.d or E.E.E.A: EEPROM fault
    Recommended action: 27


    List of recommended actions:
    If error shows at ramp up or at constant speed:
    1. Check for a short circuit or partial short circuit and the insulation of the output wire is sufficient.
    2. Increase the capacity or the inverter if it is too small. Replace with an inverter that has a larger capacity
    3. Extend the ramp-up time
    4. Decrease the torque and increase the set value.
    5. Check if the motor is blocked and if there is a sudden change in load.
    6. Check if there is a sudden chance in the power supply voltage.
    7. Extend ramp down time
    9. DC breaking is too high. Decrease DC breaking
    10. Replace the inverter.
    11. Check to see if there is a short circuit with the connection wire of the motor.
    12. Extend the ramp-down time or add a breaking resistor.
    13. Check the mains supply voltage and insure there isn't ant sudden change in voltage.
    14. Send the inverter for repair.
    15. Check whether the input voltage is normal
    16. check whether there is a sudden change in load.
    17. Check whether there is any phase missing.
    18. Check the fan in the inverter. Is it spinning? Is it blocked? Does it have any foreign matter stuck on the fins of the fan? If so, clear the fan.
    19. Check the ambient temperature in the space that the inverter is placed.
    20. Check for adequate ventilation for the inverter where it is placed.
    21. Check for jamming or any sudden change with respect to mechanical load.
    22. Set the V/F curve correctly.
    23. The motor is too small.
    24. The motor is hot and the insulation of the motor degraded.
    25. Check if the voltage has a large variance.
    26. Check if there is a phase missing.
    27. Contact the supplier

    Additional Information:
    I have cnc wood carving machine 1325 the inverter showing error 0006

    Additional Information:
    What is uc3 error

    Additional Information:
    My inverter read error oc-1 high frequency how you can help me please


    Additional Information:
    My inverter read error oc-1 high frequency how you can help me please


    Additional Information:
    203

    Additional Information:
    E2 error

    Additional Information:
    Hello , I have an Redsail cnc and I get the following error " UC3 "after that the spindle stops arter a small knocking sound ,would there be an solution to this ?

    Additional Information:


    Additional Information:
    what does it mean when my spindle VFD shows E o and stops.


    Additional Information:
    Vfd er.01.5c

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    vfd and spindle error codes listing

  • Apple break out board and software?

    Are you looking for a breakout board (CNC interface) that is compatible with Apple computers?

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    Apple break out board and software?

  • WHICH GOLFER'S MOTHER FORM THAILAND?

    Tiger Woods mother comes from Thailand.

    Additional Information:
    What country does the football player Rivaldp come from

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    WHICH GOLFER'S MOTHER FORM THAILAND?

  • WHAT IS LASER AND LENS FOCAL LENGTH?

    The lens is 20mm wide and a 50.6mm focal length (the one included). This lens will stand up to at least 30PSI air assist.

    The mirrors are 25mm wide mirrors.

    Focal length is the distance from the lens to the material for the laser converge into the best focal point. If a lens is listed as 2". You measure 2" from the lens to the material, this will be the tightest point the laser can go before it starts to re-expand again losing focus.

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    WHAT IS LASER AND LENS FOCAL LENGTH?

  • WHAT IS THE PICK AND PLACE LEAD TIME?

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

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    WHAT IS THE PICK AND PLACE LEAD TIME?

  • WHAT THE CAPITAL CITY OF NEW ZEALAND?

    Wellington is the capital of New Zealand.

    Click the link to respond:
    WHAT THE CAPITAL CITY OF NEW ZEALAND?

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