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Question #: 4681

Question: Every time the machine starts to cut a new pass it jumps +.033 inch on the x axis. Does anyone have any idea why it might do this?

Current Solution

If an axis is showing play when there is force against the axis (force in the opposite direction imposed on the bit when cutting material), the problem may be in the mechanical system. If the mechanical system is roller chain and sprocket, or rack and pinion, check the sprocket or pinion gear to confirm the tightness of the set screw. If the mechanical system is a lead screw, confirm that the coupling is secured well to the lead screw and the motor shaft.

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Other Possible Solutions to this Question

  • Can you preset an origin point on this cnc? How long does it take to jog over? (If I have the case that I using the same thickness of maple wood, and same jig everytime)?

    Yes, you can preset an origin by zeroing the machine at the desired location before beginning your work. You can return to that exact point at any time, or you can specify an offset from that point to be the beginning point for the next machine operation (for instance when cutting several parts from one sheet of wood.) Jogging time varies by machine and application but would generally be a rapid move -- our default rapid setting is 400 inches per minute.

    Click the link to respond:
    Can you preset an origin point on this cnc? How long does it take to jog over? (If I have the case that I using the same thickness of maple wood, and same jig everytime)?

  • DOES THE PLUG AND PLAY ELECTRONICS COMPUTER FOR 3 AXIS CNC MACHINE HAVE ENOUGH MEMORY RAM ADDITIONAL SOFTWARE (BOBCAD-CAM, BOBART, MACH3) TO BE ADDED FUNCTION WELL?

    The plug and play system does have enough memory for additional software. The redLeaf comes standard with a 1TB hard drive.

    Click the link to respond:
    DOES THE PLUG AND PLAY ELECTRONICS COMPUTER FOR 3 AXIS CNC MACHINE HAVE ENOUGH MEMORY RAM ADDITIONAL SOFTWARE (BOBCAD-CAM, BOBART, MACH3) TO BE ADDED FUNCTION WELL?

  • I live in North Houston by Lake Conroe, Anyone around here have a 4x8 or larger machine that would not mind doing some simple cutting for me for a project?
  • Does "Additional Length" for the Lead Screw mean Additional Length in inches? So for the 4' x-axis I have to choose Additional Length=52?

    When you add a specific length to your cart, the additional length will be in inches.
    So you will need to add the total length which will be 98" in total!

    If this is for the scratch build kit (book CNC) the total length (98") of lead screw you will need for this machine is the three axes added together:

    X-axis: 52"
    Y-axis: 32"
    Z-axis: 14"

    You will have to specify the dimensions you require by sending a email (with your order details) or call to: customerservice@buildyourcnc.com or 281-815-7701

    Click the link to respond:
    Does "Additional Length" for the Lead Screw mean Additional Length in inches? So for the 4' x-axis I have to choose Additional Length=52?

  • if i purchase the 4 Axis Electronic Combos and the Combo #1 with hardware, plans and DVD what else do i need to have a complete cnc machine

    Other items you will need if you are purchasing the electronic combo (motors, drivers, power supply and computer interface) and the hardware and plans kit:

    You will need the wood to create the structure of the machine. You will need a router to serve as the cutting instrument. You will need a computer to control the machine and the software that will serve as the control program. You will also need lead screws and rails (aluminum angles). If you intend to have faster travel than 20 ipm, we recommend purchasing the 5 start lead screws so you can achieve up to 300 ipm. https://www.buildyourcnc.com/item/mechanical-leadscrews-leadnuts-!5-5-starts-10-tpi

    Click the link to respond:
    if i purchase the 4 Axis Electronic Combos and the Combo #1 with hardware, plans and DVD what else do i need to have a complete cnc machine

  • I have the build your own CNC kit 3 Axis CNC Machine 2008, were can I get the Gcode or vector files for it ? I wanted to have it laser cut
  • X AXIS STEPPER MOTOR STALLS AND SHUTTERS WHEN COMING FROM A STAND STILL WON'T MOVE WITHOUT PUSH BY HAND. I TOOK THE CHAINS OFF SPUN FINE WITH OUT LOAD. HAVE CHAIN HOOKED UP CAN MACHINE BACK FORTH HAND, NO HANG UPS OR ANYTHING, BUT TRY TO IT DOESN'T JUST SPINS OUT. ANY SUGGESTIONS?

    If your axis shutters and will not move unless moved by another force, that sounds like your acceleration is set too high. Lower the acceleration until it works well, then lower it a bit more to have a margin of safety.

    IF that didn't work, try swapping the X and Y drivers. That way you will pinpoint if the issue is the driver. If the proplem persists, then there may be an issue with the motor itself.

    The X and Y drivers can be easily swapped by swapping only the motor wires.

    - Remove the x-axis motor wires from the X driver.
    - Remove the Y motor wires from the Y driver.
    - Insert the X motor wires into the Y driver.
    - Insert the Y motor wires into the X driver.

    Now the Y-axis will move the gantry. Test the Gantry movement by moving the Y axis using the up and down arrow keys (mach3).

    Click the link to respond:
    X AXIS STEPPER MOTOR STALLS AND SHUTTERS WHEN COMING FROM A STAND STILL WON'T MOVE WITHOUT PUSH BY HAND. I TOOK THE CHAINS OFF SPUN FINE WITH OUT LOAD. HAVE CHAIN HOOKED UP CAN MACHINE BACK FORTH HAND, NO HANG UPS OR ANYTHING, BUT TRY TO IT DOESN'T JUST SPINS OUT. ANY SUGGESTIONS?

  • my motor only steps in single increments when i click the jog button on the planet cnc software, it doesn't continue stepping as I am holding down the jog button, can anyone help me with this?

    There is a drop menu next to JOG on the main page. Will be the arrow pointing down next to the the JOG box, disable the step option which is the very first option.

    Click the link to respond:
    my motor only steps in single increments when i click the jog button on the planet cnc software, it doesn't continue stepping as I am holding down the jog button, can anyone help me with this?

  • AM NOT SURE HOW TO SET THE Z AXIS TURN ON/OFF LASER WHEN CREATE CODE. KNOW THAT ITS TYPICALLY Z-AXIS MOVEMENT DOES THIS - BUT YOU DONT SHOW ANYTHING HOOKED UP IN PLACE OF AXIS.

    When the z axis is going down, the laser turns on. When the z axis is going up, it turns off. The z axis directions is only a signal that is either 5v or 0v. That determines the direction. In vectric, you will need to set your machining operations with a very very small depth so the time it takes to get to its final depth is a very short time.

    Click the link to respond:
    AM NOT SURE HOW TO SET THE Z AXIS TURN ON/OFF LASER WHEN CREATE CODE. KNOW THAT ITS TYPICALLY Z-AXIS MOVEMENT DOES THIS - BUT YOU DONT SHOW ANYTHING HOOKED UP IN PLACE OF AXIS.

  • I have your Nema 24 electronics kit and am having problems with the Z axis dropping over time. I am using a PC 8902 motor. Any ideas on what the problem is? What should be the motor tuning values in Mach3? Thanks

    Make sure all your bolts/screws are tighten correctly and if using a lead screw make sure your anti-backlash nut is not offset. Now a default setting will be 10101100 for your driver dip switch settings and in motor tuning (mach3) 1600 steps per, 400.02 velocity, 4 in acceleration. now the acceleration and velocity can be adjusted to move your machine faster, but if set to high they could stall. Make sure you have the correct wiring from your motor to your driver (https://www.buildyourcnc.com/Documents/PN.SM60HT86-2008BF-U%20(inhouse%20PN.60BYGH303-13)%20(1).pdf).

    Click the link to respond:
    I have your Nema 24 electronics kit and am having problems with the Z axis dropping over time. I am using a PC 8902 motor. Any ideas on what the problem is? What should be the motor tuning values in Mach3? Thanks

  • I purchased a Blackfoot 4ft X 8ft in 2015 I have yet to run it. Do y’all offer any classes that can help me?? I would very much like to have this machine running. Thank you in Dayton Tx
  • Do you have a model of the Fabricator pro that can be inclined line the lean? I have seen a few other machines on the market like this. Can we use Mach4 with the fabricator pro

    Yes, you can use Mach4 wtih the Fabricator Pro CNC machine.

    We have not designed a metal machine like the Fabricator Pro to lean more in the vertical orientation. Unfortunately, we haven't gotten any requests for that style of machine, and the greenLean, although a great machine and space saver, has not been our best seller.

    If we get more interest in this type of machine, we would have no problem designing a machine like this.

    Click the link to respond:
    Do you have a model of the Fabricator pro that can be inclined line the lean? I have seen a few other machines on the market like this. Can we use Mach4 with the fabricator pro

  • hi, I atacched a laser system to my modified book machine. it worked fine for a few trials but for some reason has lost power and is not cutting through any more, it does engrave thou. what can I check for? I´ve tried everything I can think of.
  • hello there, i am using servo motor for my X and Y Axis but i dont know how to calculate steps/mm for that, the lead screw i am using is have pitch of .5 mm. please helpme on this i have done everything only this point is pending.

    The formula for finding the steps per mm is found in the units itself. First, you mentioned that the motor is a servo. This needs to be clarified as a servo is different than a stepper motor. Some servos behave similar to a stepper motor, so I will continue with this in mind.

    The formula is (steps/mm):

    You need to find the steps. The stepper motor has a natural number of steps per a full revolution. This is typically 200 steps per revolution.

    The driver for the stepper motor allows you to increase the number of steps per revolution by adding a specified number of steps between each step. For instance, if you set the driver to 1/4 microstepping, then instead of having 200 steps per revolution, you would have 200 x 4 = 800 steps per revolution.

    So now we have the first part of the formula:

    Steps / mm = (200 x 4) / mm

    Lets determine the mm side of the formula:

    You mention that the pitch is 0.5 mm. Check to insure that the lead is also 0.5 mm. This could be a multiple start lead screw where the pitch is different than the turns per mm. If in this case, that the 0.5 mm is the travel for one full revolution, then you can simply plug this into the formula as:

    mm = .5 mm

    Otherwise, determine how fat the travel is for one complete revolution.

    Therefor, with what we know and the driver is set at 1/4 microstepping and the stepper motor has a natural step count per revolution at 200:

    steps / mm = (200 steps x 4) / 0.5 mm = 800 steps / 0.5 mm = 1600 steps / mm

    If your travel for one revolution is not 0.5 mm, then plug in your travel distance instead.



    Additional Information:
    i know about steps/mm calculation for stepper motor, because i am using servo motor that why i asked about that. please tell for servo motor.

    Additional Information:
    because its my first time with servo motor i have no idea about calculation of parameter with servo.

    Additional Information:
    Have you attempted to contact the manufacturer or seller of the servo? We typically respond to customers of our products on this customer service area, unless we have extensive knowledge of the subject and can answer the question efficiently.

    Click the link to respond:
    hello there, i am using servo motor for my X and Y Axis but i dont know how to calculate steps/mm for that, the lead screw i am using is have pitch of .5 mm. please helpme on this i have done everything only this point is pending.

  • What tolerance can I expect from your largest cnc machine and the laser cutter? Also, what depth can I get on the z axis?

    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.

    The tolerance of our machines, like any machine, depends on several variables. The major variables include the manufacturing tolerance, the type of machine control used, the precision of assembly, the thoroughness of maintenance, and the initial and ongoing calibration of the machine. Because we sell kits only most of these variables are outside our control. Therefore, we are hesitant to guarantee a certain level of tolerance for an end user. However, in our experience, tolerances of .001" are readily achievable with our machines.

    Click the link to respond:
    What tolerance can I expect from your largest cnc machine and the laser cutter? Also, what depth can I get on the z axis?

  • i want to make a cutter laser machine with 4kwatt power so i want to buy all this laser components can you list the parts and cost thanks

    We can lower the price for just the hardware and also for the structure. However we do not have any files, dimensions, for public access.

    Additional Information:
    Would there be any/enough measurement or info on the instructions to extrapolate the dimensions? What would the new pricing be?

    Click the link to respond:
    i want to make a cutter laser machine with 4kwatt power so i want to buy all this laser components can you list the parts and cost thanks

  • I am looking at your 3 axis CNC machine kit(part #101) on Amazon. Is the interface on this kit USB?

    The electronics combo with the sku of 101 on Amazon.com includes a parallel interface.

    Click the link to respond:
    I am looking at your 3 axis CNC machine kit(part #101) on Amazon. Is the interface on this kit USB?

  • DO NEED TO SQUARE UP THE MACHINE AND IF SO YOU HAVE INSTRUCTIONS OR VIDEO FOR THIS?

    The eyebolts are used in the squaring of the machine. I would use a standard carpenters square and first run the end mill along the edge of the square to first make it parallel with the long axis. Then run the end mill along the other edge with the short axis and adjust the eye bolts and chain according to the angle that the machine is out of square.

    Click the link to respond:
    DO NEED TO SQUARE UP THE MACHINE AND IF SO YOU HAVE INSTRUCTIONS OR VIDEO FOR THIS?

  • How can I convert from Xylotex to yours, four axis with limit switches. Have parallel PC and steppers on machine.

    Sure, the USB interface has a place for 4 axes of limit switches.

    Each axis can have two limit switches: one for the ++ (positive) end and one for the -- (negative) end. The positive end would be the limit switch at the end of the machine that, say the machine has a 4'x8' area, reaches a bit after the 8 foot mark. The negative end would be the limit switch behind the 0 foot location behind the origin. If the origin is in the middle, the negative would be at a little more than the -4 foot end and the positive would be at a bit more than the +4 foot end. Note that you can have more than one switch on each pin where the NC is connected in serial fashion and the NO is connected in parallel fashion (this can be seen on the diagram in the multiple limits switch section). The software configurations for the limits switches are under File -> Settings -> Limit.

    A typical limit switch has three connections on it. These connections consist of COM (common), NC (normally closed) and NO (normally open). The COM would generally go to GND and the NC or the NO would go to the pin. If the NC is used, then the the switch is constantly connected until the switch is pushed (engaged) then the connection from the pin to gnd is broken (open). Use the settings in software to set whether in NC or NO configuration.

    Let me know if this information was helpful (or not) by adding information to this question. Thanks.

    User response:
    Thank you very much for this helpful information. I'm still a little fuzzy on how the 6 limit switches physically connect to each other and to the USB breakout board. You've stated one switch (home) goes to positive and another switch (limit) goes to negative. Are all the GND prongs from all 6 switches connected to each other and going to GND on the breakout board, or no? And the NC prongs, how exactly are they connected to each other? And to the board? There has to be a diagram somewhere shows this visually, no? I don't know how to wire the switches in series or in parallel. I have already physically installed all the switches on the machine and ran the wires to where the board is. Now I just need to know where to plug these wires into the board. Also, taking into consideration that I'm using the Planet CNC software, the only settings I have pertaining to limit switches is "Enable/Disable" for each axis, and the actual limit for each axis. Nothing about NC or NO. Is that only in Mach3?
    Thank you.

    buildyourcnc response:
    On the USB interface, the COM on the switch connects to GND and the NC or NO connects to the input pin (i.e. x++, y--, etc.)

    Limit switch configuration is rather difficult to understand, especially with series and parallel. You can think of series as a single wire going from GND to the axis letter input terminal (i.e. X++ or X--). If the wire is broken, then the circuit is open (or the switch is engaged in a normally closed scenario). Normally closed is like an actual wire, and when engaged, the switch "opens" (breaks the wire). This is why we recommend in some systems that you can put many switches in series on a single pin. When one of the switches is engaged (breaking the connection) then the entire circuit of switches is broken and the machine stops.

    In a parallel scenario, the state of the circuit is always broken until the one of the switches is engaged and the circuit is then closed or connected. The topology looks like a ladder. All the switches connect to both sides of the ladder and the switches are like the runs of the ladder (the horizontal bars that the feet are placed while climbing). Imagine all of the switches broken in this scenario (normally open). It would be like the ladder could be split in two, but if one of the ladder runs (switches) is closed by engaging it, then that run would connect both sides of the ladder and the two sides of the ladder would have a connection.

    There is a diagram on the USB page of the various limit switch configurations. If you need more information (visual and/or otherwise), please let us know and we will immediately add that information to benefit everyone.

    Click the link to respond:
    How can I convert from Xylotex to yours, four axis with limit switches. Have parallel PC and steppers on machine.