CR-10S - The stripping

The Stripping

Note: The publish date is two days after the work detailed on this entry.

The CR-10S that was shipped to me comes with this kind of z-couplers:




In an effort to fix the x-axis problem I described on my previous blog entry i unsighted and re-tighned those couplers. You need to apply a "health" amount of torque to those screws to get the coupler to hold the motor shaft securely.

And of course I stripped the thread of one.

Looking on the web were to find a replacement found out the if you order them back from the manufacturer it may take up to 30-days to arrive.

USA-based distributors were out.

Bad luck.

Look a the first picture, how much thread is "wasted" by the small screws they gave us.
My solution was to put a longer screw and fortunately it grabbed enough "good threads" to work. Phew!

Comments

  1. ChristopherFebruary 16, 2018 at 6:42 AM

    I had exactly the same problem and it looks like we're not alone. These new couplers are apparently designed to have a better chance of surviving the delivery, but instructions on tightening them are vague and I wasn't expecting them to be so prone to stripping. I've actually ordered a normal/original style 5mm to 8mm coupler to replace mine because I didn't have any longer screws to hand.

    ReplyDelete
    Replies
    1. RobertFebruary 16, 2018 at 9:26 AM

      Sorry you to endure the same frustration. These couplers require a "good tightening" but since they put short screws all that tension was supported only by a few threads hence the stripping.
      The old fashioned models work ok however be careful when lifting the gantry or of the nozzle crashes...
      Those issues were supposed to be avoided with the new style couplers.

      Delete

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