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Question #: 13462

Question: I recieved 2 hiwin linear rails in a tube with tape on it that says recieved in damaged condition. I got 2 rails 2 zerk fittings, no bearing blocks or lead screw. And technically I should have 2 more zerk fittings

Current Solution

Was there an opening in the tube upon arrival? Did the tube look like it was wrapped up by the shipper due to the damage that occurred? I am suspecting that the package was damaged by the shipper and the tube suffered an opening where the parts may have fallen out. Make sure to take many pictures of the damaged package condition so a claim can be generated.

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Other Possible Solutions to this Question

  • I have a project very similar to cnc machine. I need 3 lead screws of 1.8 m with all set (supports, bearings...etc). and 3 NEMA 42 motors that I can connect with. if those are available, I need the information about shipping to Oman or UAE.
  • Hello what is the thread size of the water cooling fittings on the 2.2kw spindle? I am wondering if I can replace the fittings with standard pc liquid cooling fittings, which are G1/4".

    They do have a similar looking thread as the G1/4”, but I will confirm in the morning. We use the G1/4” on the pump and radiator so it will be easy to determine this fit when I get into the office.

    Additional Information:
    Another FAQ says it is an M8, but I will confirm.

    Additional Information:
    These are M8x1 thread. I was able to find M8x1 3/8 barb fittings on Ebay. I plan to drill and tap my spindle to G1/4 though.

    Click the link to respond:
    Hello what is the thread size of the water cooling fittings on the 2.2kw spindle? I am wondering if I can replace the fittings with standard pc liquid cooling fittings, which are G1/4".

  • I purchased some of your 20mm Hiwin Linear Rails. M5 bolts do not fit flush. The head stands out. Is the spec sheet out of date? What bolts will fit this rail AND T Nuts compatible with 8020's 15 series extrusions? Thanks.

    Hi. The HIWIN spec rail will fit standard M5 screws. If you are using non standard screws with wide heads, or pan heads that are a bit larger than a standard round heads, then it may not fit. Make sure to source screws that have standard round heads, or socket heads for fastening the 20mm HIWIN spec rails.

    Click the link to respond:
    I purchased some of your 20mm Hiwin Linear Rails. M5 bolts do not fit flush. The head stands out. Is the spec sheet out of date? What bolts will fit this rail AND T Nuts compatible with 8020's 15 series extrusions? Thanks.

  • Hi, I need the lead screws and bearings for the 4' x-axis, the 2'(?) y-axis and the 1'(?) z-axis as specified in the book 'Build your own cnc'. I am not sure which to order on your website. Thanks

    You can find the required components for our scratch build CNC here(https://buildyourcnc.com/cnckitintro.aspx).

    Lead Screw needed will be:
    X-axis: 52 Inches
    Y-axis: 32 Inches
    Z-axis: 14 Inches

    These will be the bearings that are specified that will be needed:
    Bearings 1/2" Inside Diameter - 6
    Bearings 5/16" Inside Diameter - 24

    Click the link to respond:
    Hi, I need the lead screws and bearings for the 4' x-axis, the 2'(?) y-axis and the 1'(?) z-axis as specified in the book 'Build your own cnc'. I am not sure which to order on your website. Thanks

  • I just ordered a 1/2" lead screw and bearings, etc. But I don't see any 1/2" shim washers for those bearings. If you have any, please toss 8 of them in the shipment and I'll gladly reimburse you.

    We will provide shim washers as a part of machine assemblies, but when purchasing lead screw and bearings, the shim washers must be purchased as well. Please give us a call and we can send them out.

    Click the link to respond:
    I just ordered a 1/2" lead screw and bearings, etc. But I don't see any 1/2" shim washers for those bearings. If you have any, please toss 8 of them in the shipment and I'll gladly reimburse you.

  • I need the calculation to determine the stepper motor torque to find the load that it can withstand in horizontal position using a lead screw at 1/2" diameter with 13 TPI.

    There are two main questions that we can answer with respect to motor torque and the mechanical advantage of lead screws, 1) What torque motor do you need to lift a particular weight, or 2) What maximum weight will my motor torque be able to lift.

    This formula uses Newtons (N) as it's final unit. Use this with the included radius (R) to determine the torque. Newtons can easily be converted to lbs or ounces using online conversions.

    Effort = Sf + (Load/(2 x pi x (R/p) x Se))

    where:
    p = pitch of the screw
    Se = screw efficiency = Standard lead screw will be between 20% (.2) and 40% (.4)
    Sf = static force. This is the force that is needed to start the movement. The number may be eliminated, but it is good to use a number in the 5 N to 20 N range.
    Load = the expected load that the effort will need to carry (i.e., the router and the included axis assembly that the motor will need to lift)
    R = radius of the lead screw


    This formula is based on the "law of the machine"

    The final effort amount with its unit of newtons and R will be the torque. For example, if the effort comes to 100 N (newtons) and the R is .5 inches, then you can assume that the effort is 50 N-in since it would take twice the effort to turn form the one inch mark from the center of the shaft.

    Example:

    Load = 90 N (20.2 lbs)
    R = 1 inch since that is the length from the center of the shaft that the motor is rated
    p = 1 inch / 13 = .08 inches

    Effort = 5 N + (90 N / (2 x 3.14 x (1 / .08) x .2))
    Effort = 5 N + (90 N / (6.28 x 12.5 x .2))
    Effort = 5 N + (90 N / (15.7))
    Effort = 5 N + (5.73 N)
    Effort = 10.7 N = 2.4 lbs = 38.4 oz-in

    I am putting the oz-in on the end because the formula considers the distance from the center of the shaft to be one inch.

    Therefore, a 425 oz-in motor would be able to lift a 20.2 lb Router with its accompanying assembly. If the assembly and router is heavier, plug in the numbers and determine the effort required.

    With a bit of algebra, the formula can be rewritten to find the load:

    Load = (Effort - Sf) x (2 x pi x (R/p) x Se)

    Another formula that does not consider friction at all:

    Effort = (Load x p) / (2 x pi x R)

    Lets see if we get similar results:

    Effort = (20 lb x .08 inches) / (2 x 3.14 x 1)
    Effort = 1.6 / 6.28 = .255 lbs = 4.08 oz-in

    The results from both formulas appear to be very small because a 13 TPI screw will have enormous mechanical advantage.

    It is evident that the first formula that does consider friction that we are loosely estimating is far more conservative than the second formula. Either way, even the most conservative formula shows that the 425 oz-in motor will handle very large weights. If you are using a lead screw with only two turns per inch, .5 inch pitch, you can determine the requirements with the first formula.

    Example for a 10 TPI 5 start (2 turns per inch) lead screw:

    Load = 90 N (20.2 lbs)
    R = 1 inch since that is the length from the center of the shaft that the motor is rated
    p = 1 inch / 2 = .5 inches

    Effort = 5 N + (90 N / (2 x 3.14 x (1 / .5) x .2))
    Effort = 5 N + (90 N / (6.28 x 2 x .2))
    Effort = 5 N + (90 N / (2.512))
    Effort = 5 N + (35.83 N)
    Effort = 40.828 N = 9.18 lbs = 146.88 oz-in

    Customer Response:
    thank you so much

    Additional Information:


    Additional Information:


    Additional Information:
    how do i calculate torque of stepper motor if lead screw coupled to motor shaft and load applied by lead screw on plate is 100 kg by vertically

    Additional Information:
    Pls


    Additional Information:
    1m 16mmdiameter ball screws calculations

    Click the link to respond:
    I need the calculation to determine the stepper motor torque to find the load that it can withstand in horizontal position using a lead screw at 1/2" diameter with 13 TPI.

  • On the Book Build: I'm changing the 13TPI 1/2" lead screw with the 1/2" 10 TPI Acme screw with the anti backlash nut. This is for the Z axis only. What should I know about installing it and what are the numbers I need to plug into the motor tuning area.

    The settings that will have to be change will be your steps per inch in motor tuning (mach 3), or settings/axes(planetCNC). But we do not have the actual numbers/specs that will fit your 10 TPI 5 start lead screw, here is a tutorial video which explains how to get the exact numbers you need! (

    ).
    Here is a default setting that you might be able to tune and adjust accordingly: 1600 steps, accel 400.02, velocity 5.

    Click the link to respond:
    On the Book Build: I'm changing the 13TPI 1/2" lead screw with the 1/2" 10 TPI Acme screw with the anti backlash nut. This is for the Z axis only. What should I know about installing it and what are the numbers I need to plug into the motor tuning area.

  • What grease should be used on Hiwin linear rails and blocks?

    You will want a grease that can be used in high temperature and heavy load situations also called high load bearing grease. A simple google search will yield many results from which to choose. We plan to carry this product in the near future (by the time you read this, we may already carry it).

    Click the link to respond:
    What grease should be used on Hiwin linear rails and blocks?

  • can you please specify how to connect the collar/nut and bearings to prevent the axial movement of lead screw. Do I have to put that next to the stepper motor /coupling assembling or on the other side where the lead screw comes out. Or is there any way I can make the flexible coupling rigid so it does not come out of the middle spider?

    You would use a combination of bearings and collars to prevent your lead screw or rod from being able to move back and forth. Without it being able to move back and forth, you shouldn't have the couplings coming apart, because the motor is solidly mounted and unable to move as well.

    I will try to draw a picture using symbols, with a key to define what each part is.

    --CB|--------------|BC}{M

    - = Lead Screw or Rod
    C = Collar
    B = Bearing
    | = Wood, the frame of your machine
    }{ = Coupling
    M = Motor

    On the example above you could replace the collar on the motor side with one half of the coupling, putting it right upside of the bearing to hold it in place instead. Like this:

    --CB|--------------|B}{M

    You could also place the bearings on the inside as follows:

    ----|BC----------CB|--}{M

    Click the link to respond:
    can you please specify how to connect the collar/nut and bearings to prevent the axial movement of lead screw. Do I have to put that next to the stepper motor /coupling assembling or on the other side where the lead screw comes out. Or is there any way I can make the flexible coupling rigid so it does not come out of the middle spider?

  • HI, I HAVE INTENTION OF PURCHASING YOUR 1/2 INCH PRECISION LEAD SCREW SET TO BUILD MY CNC MACHINE, COULD THE SCHEMATIC DIMENSION ANTI-BACKLASH NUT, BEARING FOR AND SHIM? ALSO IS 2.2KW SPINDLE ABLE MILL ALUMINUM WHAT ACCURACY?

    BYCNC response:

    Milling aluminum is no problem with our machines.

    Here is a video we recently did with our 4'x8' machine. The aluminum piece is about 1/4" thick: https://buildyourcnc.com/tutorials/tutorial-greenbull-aluminum-cutting

    The accuracy you will see from our our 2.2kW spindle is entirely dependent on the precision of your build, so it's not possible to say what level of accuracy you can achieve without an examination of the complete system. However, our spindles have a runout of less than .0001 in, which includes the collets that we sell. If you use a collet from another manufacturer, we cannot guarantee this TIR (Total Indicated Runout) dimension.

    For the dimension drawing of the anti-backlash nut, please contact us directly by phone or email to techsupport@buildyourcnc.com

    User response:
    I have emailed waiting for your reply.

    User response:
    Hi, I am still waiting for your email reply.

    BYCNC response:
    Your email has been sent.

    Click the link to respond:
    HI, I HAVE INTENTION OF PURCHASING YOUR 1/2 INCH PRECISION LEAD SCREW SET TO BUILD MY CNC MACHINE, COULD THE SCHEMATIC DIMENSION ANTI-BACKLASH NUT, BEARING FOR AND SHIM? ALSO IS 2.2KW SPINDLE ABLE MILL ALUMINUM WHAT ACCURACY?

  • HI, I HAVE INTENTION OF PURCHASING YOUR 1/2 INCH PRECISION LEAD SCREW SET TO BUILD MY CNC MACHINE, COULD THE SCHEMATIC DIMENSION ANTI-BACKLASH NUT, BEARING FOR AND SHIM? ALSO IS 2.2KW SPINDLE ABLE MILL ALUMINUM WHAT ACCURACY?

    BYCNC response:

    Milling aluminum is no problem with our machines.

    Here is a video we recently did with our 4'x8' machine. The aluminum piece is about 1/4" thick: https://buildyourcnc.com/tutorials/tutorial-greenbull-aluminum-cutting

    The accuracy you will see from our our 2.2kW spindle is entirely dependent on the precision of your build, so it's not possible to say what level of accuracy you can achieve without an examination of the complete system. However, our spindles have a runout of less than .0001 in, which includes the collets that we sell. If you use a collet from another manufacturer, we cannot guarantee this TIR (Total Indicated Runout) dimension.

    For the dimension drawing of the anti-backlash nut, please contact us directly by phone or email to techsupport@buildyourcnc.com

    User response:
    I have emailed waiting for your reply.

    User response:
    Hi, I am still waiting for your email reply.

    BYCNC response:
    Your email has been sent.

    Click the link to respond:
    HI, I HAVE INTENTION OF PURCHASING YOUR 1/2 INCH PRECISION LEAD SCREW SET TO BUILD MY CNC MACHINE, COULD THE SCHEMATIC DIMENSION ANTI-BACKLASH NUT, BEARING FOR AND SHIM? ALSO IS 2.2KW SPINDLE ABLE MILL ALUMINUM WHAT ACCURACY?

  • At 3:29 in the video "blackToe version 4 2x4 step 9 0001" it shows you inserting a bearing into the hole that the x axis shaft exits the router. That hole is 3/8ths on my parts. No 3/8 OD, 1/4 ID bearing came with my kit, but I do have a 5/8 OD, 1/4 ID bearing. Should I bore out the hole to 5/8 so I can insert those bearings?

    This turned out to be a side-effect of the "foot logo" now being bored entirely through the gantry legs. On first inspection this made the two legs identical. I didn't notice that the hole for the X axis axle was bored out to 5/8, but only on one side. Not too surprisingly, I installed them on reverse sides.

    Pulling the legs off and swapping the side they were mounted on fixed the problem. I would suggest adding a note to the building instructions page to avoid this annoying problem.

    On the good side, the X axis now rolls much more freely on its rails after un-mounting and re-mounting the legs.

    Additional Information:
    Good catch and thank you for the information. We will clarify this on the video.

    Click the link to respond:
    At 3:29 in the video "blackToe version 4 2x4 step 9 0001" it shows you inserting a bearing into the hole that the x axis shaft exits the router. That hole is 3/8ths on my parts. No 3/8 OD, 1/4 ID bearing came with my kit, but I do have a 5/8 OD, 1/4 ID bearing. Should I bore out the hole to 5/8 so I can insert those bearings?

  • Hey. I have noticed that you guys use roller chain to move x,y axis and a lead screw to move the z axis, can you please explain the motivation in short? Thank you.

    Dealing with running our CNC machines with roller chain on the X/Y-axes and lead screw on the Z-axis, we chose this method due to functionality and cost effectiveness. We wanted to make the lowest cost CNC machine available for our customers without taking to much functionality and precision away from the machine. We wanted the accuracy and cost effectiveness to be surprisingly high, with our machines getting thousandths of an inch will be no issue, and having it at a decent price!

    Click the link to respond:
    Hey. I have noticed that you guys use roller chain to move x,y axis and a lead screw to move the z axis, can you please explain the motivation in short? Thank you.

  • 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.

  • I am configuring a blackfoot with 1 CW8060 and 2 CW230's with linuxcnc and cannot figure out the proper settings for stepconf. Can you provide the default settings that should work with these motors?

    These are the recommend values(default) for our blackFoot CNC machine, the acceleration and velocity can be adjusted as high as the motor can rotate without stalling! Suggested increment's will be by 10's.

    blackFoot:
    X-axis
    “CW8060 (6.0A) Driver”
    Set to 1/16 Microstep, 5.43A
    Dipswitches: 01100110 (“0”=down, “1”=up)
    Motor Tuning: 914.29 steps/in, Velocity 400.02, Acceleration 4

    Y-axis
    “CW230 (3.0A) Driver”
    Set to 1/16 Microstep, 2.7A
    Dipswitches: 11001100
    Motor Tuning: 1422.22 steps/in, Velocity 400.02, Acceleration 4

    Z-axis
    “CW230 (3.0A) Driver”
    Set to 1/4 Microstep, 2.7A
    Dipswitches: 10101100
    Motor Tuning: 1600 steps/in, Velocity 79.98, Acceleration 5

    Additional Information:
    Thanks! What about step and direction config? I have:
    Step time: 2000ns
    Step space: 8000ns
    Direction hold: 5000ns
    Direction Setup: 5000ns

    Click the link to respond:
    I am configuring a blackfoot with 1 CW8060 and 2 CW230's with linuxcnc and cannot figure out the proper settings for stepconf. Can you provide the default settings that should work with these motors?

  • How to determine lead screw length needed. My Thomson 1 1:4 rails are 60 inches long roughly for the router I’m building. I know I have to have it long enough to couple up with the stepper motor of course but does it matter if it’s a little long on the other end

    It generally does not matter if it is longer at the other end as long as the lead screw provides the desired travel for that axis. The lead screw will only need to be long enough for the travel, plus any structure and lead-nut positioning.

    For example:
    - The motor that will turn the lead screw will need to be mounted at some position (generally at one end of the axis). In many cases, this positioning will be mounted where some of the lead screw will not be used (the lead nut will not be able to moved close to the coupling of the lead screw to the motor shaft). Add some of the length of the lead screw to be inserted into the coupling.

    - If the lead screw will contain bearings at either end of the travel, that portion of the mechanical assembly will need to be considered in the lead screw length.

    - The lead-nut will need to be mounted in a position on a structural member of the part that is to move. The distance from the part of the structure that will extend closest to the motor will have some distance to the position of the lead nut. This distance will need to be added to the lead screw length.

    Add these discrepancies to the length of the lead screw and the travel length and you will have the final length.

    Click the link to respond:
    How to determine lead screw length needed. My Thomson 1 1:4 rails are 60 inches long roughly for the router I’m building. I know I have to have it long enough to couple up with the stepper motor of course but does it matter if it’s a little long on the other end

  • I want to order 8 HIWIN Linear Guide Blocks. Is there a cheaper shipping option? $70 is too much for something that weighs less than 5 lbs. I live in the continental US

    Prices on amazon are fixed costs for shipping. The website generally reports high costs for international shipments but we can give you a better quote if you care to email sales@buildyourcnc.com

    Click the link to respond:
    I want to order 8 HIWIN Linear Guide Blocks. Is there a cheaper shipping option? $70 is too much for something that weighs less than 5 lbs. I live in the continental US

  • Should I have recieved documentation on any of the parts? No connection diagrams or pin callouts were included. No motor spec sheet either.

    All of the information and instructions for kits and products are shown on their respective product pages. If you need personal assistance, please give us a call and it will be our pleasure to guide you and solve any problem that you may have.

    Click the link to respond:
    Should I have recieved documentation on any of the parts? No connection diagrams or pin callouts were included. No motor spec sheet either.

  • what type of lubrication should one use on a 20 mm leadscrew and 20 mm round recirculating rail bearings

    You will want a grease that can be used in high temperature and heavy load situations also called high load bearing grease. A simple google search will yield many results from which to choose. We plan to carry this product in the near future (by the time you read this, we may already carry it).

    Click the link to respond:
    what type of lubrication should one use on a 20 mm leadscrew and 20 mm round recirculating rail bearings

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