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Question #: 9051

Question: Anyone having a deflection problem with onsrud compression 1/4 bit

Current Solution

We can't speak to the specific endmill you are using, but can provide some general information about tool deflection. In general, anything that increases rigidity of the cutter will minimize deflection and vice versa. Mathematically, deflection is directly proportional to the cube of the length divided by the fourth power of the diameter.

Practically speaking, with all else equal, cutter diameter will have the largest impact on deflection (bigger being better), followed by stickout (the amount of cutter extending past the collet) which should be minimized, and finally number of flutes (fewer cuts in the metal = more rigidity).

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Other Possible Solutions to this Question

  • HI..I am having a problem with my machine going off axis and not returning to zero

    Hi, can you elaborate on what you mean off axis? If the CNC router is milling correctly and then suddenly in a location that you would not expect, then you are exceeding the torque of the stepper motors and stalling. If the cnc router stalls, then the cnc router will continue but the software controlling the cnc router will not have the correct position of the cnc router.

    If this is the case, then you need to either reduce the acceleration, reduce the velocity, or both. Does the problem occur during the milling process or during the jogging (rapids)?

    Click the link to respond:
    HI..I am having a problem with my machine going off axis and not returning to zero

  • Is there a better manual for the laser engraving controle having problems with the set up of the stepping motors etc

    This "question 12186" could be a good place to house questions on the laser controller. We are in the process of creating thorough video instructions, but please add specific questions by clicking the "submit additional information" and we will answer questions regarding the laser controller with detail.

    Click the link to respond:
    Is there a better manual for the laser engraving controle having problems with the set up of the stepping motors etc

  • Im having software setup problems with my backtooth (mach3) and i seem not to find a solution in the forum. what can i do?

    You can call us, send an email, or pose the specific question on this customer service live that pertains to the issue that you are having.

    Click the link to respond:
    Im having software setup problems with my backtooth (mach3) and i seem not to find a solution in the forum. what can i do?

  • I'm having a problem with my controller card: I can measure 24 volts going to the card, but when I set Mach3 outputs I reagister no voltage. Please help
  • Having issues with my cnc router constructed with your materials.

    Please be very specific on what issue you are having.

    Is this the scratch build machine? It is a machine kit that you purchased from us?


    Having issues with my cnc router constructed with your materials.
    1.) Machine is calibrated with a precision six foot steel scale at 30” measurement and appears to be right on the dimension under no load condition.

    2.) When cutting a test program of a rectangle Y 12” x X 6” the final cut dimensions are:
    X = 5.946 (-.054) short and Y = 11.900 (-.100) short.
    This is a chain drive machine using your small chain stock.
    Can chain tension be part of the issue or am I missing something????
    Have made several cuts with reduced feed and depth of cuts. No change in errors……
    Best regards.
    Marc

    This is a machine of my own design that I built using your electronics package purchased in 2010. Including your five start Z axis lead screw and your small chain with spur gears package for the x and y axis. this machine is designed to fit that floor space of my shop. Last year I sent you folks a photo of the unit. It has hardened steel X,Y and Z rails not the aluminum rails that you offer. it is also made from Baltic Burch 3/4" plywood.

    When cutting a test program of a rectangle Y 12” x X 6” the final cut dimensions are:
    X = 5.946 (-.054) short and Y = 11.900 (-.100) short

    There is a dimensional discrepancy from programmed dimension and the actual cut dimension???? what could cause this issue????
    please refer to data supplied........... thanks.

    Click the link to respond:
    Having issues with my cnc router constructed with your materials.

  • Having issues with my cnc router constructed with your materials.

    Used your electronics package and chain drive materials to construct personal design cnc to fit my floor space.

    Machine is calibrated with a precision six foot steel scale at 30” measurement. When cutting a test program of a rectangle 6” x 12” the final cut dimensions are:
    X = 5.946 (-.054) short and Y = 11.900 (-.100) short.
    This is a chain drive machine using your small chain stock.
    Can chain tension be part of the issue or am I missing something????

    will be traveling to San Antoine this pm but will try to answer any follow up question after the first of the year.

    Happy New Year to all.

    Best regards.
    Marc

    Click the link to respond:
    Having issues with my cnc router constructed with your materials.

  • Is there anyone who deal with these questions from customers?

    Yes sir. The holiday season has been brutal on us, but we are back in shape and answering all of our customer related questions. Please ask your question here on "Customer Service Live" or call us if you have an urgent matter.

    Click the link to respond:
    Is there anyone who deal with these questions from customers?

  • Can I get a receipt of my online order? I ordered it without having An account.

    Give us a call and we will email you a receipt immediately.

    Click the link to respond:
    Can I get a receipt of my online order? I ordered it without having An account.

  • Can you ship the parts to India without having an end user to deal with the customs?

    We follow all regulations in regards to international shipments. The only way to avoid dealing with customs would be to hire a local courier to handle the process for you.

    Click the link to respond:
    Can you ship the parts to India without having an end user to deal with the customs?

  • THE DUST SHOE HAS STIFF BRISTLES, IS THERE PROBLEM WITH MOVING Z-AXIS DOWN SINCE BRISTLES PUSH AXIS SIDEWAYS

    A couple things to consider, the machine is most likely moving sideways, so the bristles won't be a problem. The lead screw has a very hight mechanical advantage and the bristles don't pose an issue with this. We have not found that the bristles cause any appreciable deflection to the work we do in our shop; however, you can change the brush for a more pliable plastic, or reduce the number of bristles by selectively pruning.

    Click the link to respond:
    THE DUST SHOE HAS STIFF BRISTLES, IS THERE PROBLEM WITH MOVING Z-AXIS DOWN SINCE BRISTLES PUSH AXIS SIDEWAYS

  • PROBLEM WITH LIMIT SWITCHES TRIGGERING

    Are you using shielded wire? If so, take the shield to ground. If there are any other wires in the cable that is not being used, ground those as well. The customer can also try moving the cables as far away as possible from the motor wires and motors.

    Additional Information:

    Click the link to respond:
    PROBLEM WITH LIMIT SWITCHES TRIGGERING

  • 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 have a KL-4030 stepper motor driver that I only have about an hour use on it but seems to be bad already. Has anyone out there had the same problem?

    The KL-4030 is a Keling 3.0 amp stepper motor driver. These are generally pretty robust drivers. You mentioned in the question that it worked for one hour. This sounds like it could be a contact issue with the wiring in the terminals. I would recommend that you check all of the connections. The terminals that are used in these drivers have terminals that are easily used incorrectly.

    Make sure to open the terminal all the way using a small screw driver. Then insert the exposed wire into the opening and re-tighten the terminal. Make sure of a good connection by tugging on the wires.

    Also, check kthe digital wires that connect from the driver to the control board.

    Click the link to respond:
    I have a KL-4030 stepper motor driver that I only have about an hour use on it but seems to be bad already. Has anyone out there had the same problem?

  • hi i think i have a faulty mk1 breakout board im having a problem with my limit ports before even adding any wires to the board am getting continuity between the x-- and the x++ pins is this normal or is my board faulty thanks.

    Getting continuity from the x--/x++ might not mean it is a faulty board, unless they are bridged, so both get a pulse rather than one. But to check if you might have a opposite connection for those input:
    Planet-cnc/file/settings/input/invert inputs/input 1/input 2.

    Additional Information:
    In input port section in config. Scroll down and you will see THC On, Up and Down. Enter your input pin numbers there.

    Click the link to respond:
    hi i think i have a faulty mk1 breakout board im having a problem with my limit ports before even adding any wires to the board am getting continuity between the x-- and the x++ pins is this normal or is my board faulty thanks.

  • Can bits with shank length of 1" be used in the 1/8" ER20 collet?

    If this endmill/bit has a shaft of 1", plus the cut length the ER-20 collets we provide will work without any issues.

    If the shank goes into the 1/8" ER20-collet at least .773 (safety margin), it will work without any problems. (This is only for the 1/8" ER20-collet)

    Click the link to respond:
    Can bits with shank length of 1" be used in the 1/8" ER20 collet?

  • Will the Mach 3 USB breakout board work with a Windows 7 64 bit system?

    I don't see why Mach3 under windows 64-bit wouldn't work with an interface that uses USB as it's primary communication method. I am a bit vague on this, so I will do more research on it.

    We recommend Mach3 run under Windows 32-bit when using the parallel interface as this is a legacy function.

    Additional Information:


    Additional Information:
    mach 3 usb board setup

    Additional Information:
    I am running Mach3 under Windows 7 Pro 64bit without any problems.

    Additional Information:


    Additional Information:

    Click the link to respond:
    Will the Mach 3 USB breakout board work with a Windows 7 64 bit system?

  • What's the problem? https://www.youtube.com/watch?v=J_R9CEjXrKU

    For the 2.2kw spindle. What is the operating pressure and volume of the water cooling system? How well does your spindle work on cutting and shaping aluminum? Do you have a graph of the torque curve? Thank you

    Click the link to respond:
    What's the problem? https://www.youtube.com/watch?v=J_R9CEjXrKU

  • How fast can I cut 1/4" wood with the 40 watt CO2 laser?

    CO2 laser will not cut wood material fast at all. This is just the nature of the laser energy. The wood is a very low absorbent of the laser energy and you will need to run probably around 10 ipm to cut through the wood. CNC is much more efficient for cutting and laser as more efficient at marking or slowly cutting if you need the small kerf. You will also need a relatively high output air source to cut efficiently. The air will blow away the char (carbon) on the wood. The black char will absorb most of the laser energy not allowing the wood to be cut well. We use a compressor for the air source, but you can use a commercial hydroponic air pump instead.

    Click the link to respond:
    How fast can I cut 1/4" wood with the 40 watt CO2 laser?

  • My Z axis stepper is "cogging," new problem on an older machine, any solutions?

    If by cogging, you are referring to the lack of torque by the presence of the lack of current to the motor, I would check the wires coming from the motor to see if there is any chafing, causing either shorting, or a connection issue. This happens on older motors due to the method of holding the wires steady using zip ties or other form that can cut the insulation of the wires. If you see this phenomenon only at specific locations on the axis, then wire chafing could be the culprit. But, can also be friction on the lead screw/anti-backlash nut.

    Check the anti-backlash nut for any presence of oily debris. Remove this debris and re-lubricate the lead screw.

    Check between the coupling at the motor shaft and the bearing that is positioned against the coupling. There should be a small outside diameter shim washer between the coupling and the inside race of the bearing. If there is no shim washer, then the coupling is rubbing against the outside race, causing friction, or binding.

    If these methods do not work, please submit additional information on this FAQ page using the additional information button and a new solution will be submitted by us.

    Customer response:
    Thank you for your quick response. I found the Z-axis binding with the anti-backlash nut. What would you recommend to lubricate the anti-backlash nut and lead screw?

    Additional answer:
    I would recommend using 3-in-1 oil to lubricate the lead screw and the anti-backlash nut. Don't worry about the material of the anti-backlash nut breaking down since it is made of Delrin, a plastic that can be exposed to lubricants and oils.

    Click the link to respond:
    My Z axis stepper is "cogging," new problem on an older machine, any solutions?

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