Strain Relief HBP Cable

by slightlynybbled, published

Strain Relief HBP Cable by slightlynybbled Oct 8, 2011
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Had an interesting problem. Details of problem and solution at: http://wiki.makerbot.com/forum/t-398964/hbp-weird-problem

The Problem: During builds, the individual wires of the HBP cable are flexed at the point of entry into the pin contact. This causes fatigue and, eventually, failure.

The Symptoms: Your HBP works erratically or not at all. Your control panel may report a HBP temperature of 1024 (this is a built-in error code).

The Fix: Solder your contacts (beyond the scope of this part, may not be necessary if you haven't yet fatigued your wires), install a strain relief (instructions below). Fast and easy to install, fast and easy to remove! This part holds your wires very firmly!

What I Need from You:

  • I had started my MkB with the ABP, but quickly moved to HBP as the belt started wearing pretty quickly and I just don't want to deal with that. I strongly suspect that this part is compatible with the ABP, but I'm not sure. Could someone check this out?
  • I also do not own a CupCake. If this works with the CupCake, let me know so that I can post it here!

Additional Notes:

  • My HBP is raised slightly to make leveling easier (I just find it easier this way). The part should fit on most machines, but if there is an issue, feel free to post the fix.
  • SolidWorks 2011 file attached. The zip-tie cutouts can easily be edited by looking in the feature tree. The cutout features have been named. Other features can easily be edited as well, but there wasn't any effort to point out the locations within the feature tree. Feel free to request changes. I make an effort to make the parts highly modifiable.

Image descriptions:

  • Final part is printed while the first-run prototype is still in place.
  • Strain relief installed and functional
  • SolidWorks screenshot (it is difficult to see the real form in the actual pictures)


Total time, begin print to complete install: 25min

Optional: Zip tie cables together (I do this obsessively on all cables, all the time)

  1. Print the attached part (print time 20min or less with 30% fill, Mk6+, 40mm/s).
  2. Slide slot over the wooden support under the HBP, ensuring that there is room between the part and the HBP. If there is contact here, you may wish to re-design the part, raise your HBP, or just trim the part back. Be sure to slide it right up against the connector body of the HBP cable.
  3. Use a large zip tie to secure the connector housing. It helps to have the flats of the zip tie along the flat portion away from the connector (see pic). Pull the zip tie very tight! The strain relief should be firmly and immovably seated against the connector housing. There is a slot provided for a "large" zip tie.
  4. Place the cable in the semicircular cutout.
  5. Use a small zip tie to secure the cable to the strain relief. Again, it helps to have the flat of the zip tie againtst the flat of the part away from the connector.
  6. Cut the excess from the zip ties.
  7. Stop by here and tell me that you like (or don't like) the part!

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This doesn't fit if you're using thumbscrews to level the height of the HBP platform. A solution is to mirror the .stl in the Y axis in replicator G, and then file / cut off a bit of the slope to clear the 2pin HBP ABP motor connector.

Hey guys -

Just to be clear, it should look a lot like SparkySD's picture! It won't really work if it isn't attached that way. Good luck,


Hey, I see that the 'other people's copies' has another post by MoshkinIvan, and the bracket is attached to the HBP. If it works this way, that is great, but it is intended to fit on the wood underneath the HPB. Otherwise, you slightly reduce your build platform.

It's not work with ABP. I think need change this constraction. Height too much, catch corner axes Z.

An easy and quick print.

It mounted well. I moved the platform around using the jog mode (long) and it appears to hold the wires stationary with respect to the connector.

Love the idea and thank you for uploading it, why is the .stl 47mb?

Oh yeah, and thanks for posting the pic. Yours is much clearer than mine! I love the white ABS, but photogenic it is not!

No problem, I'm glad you like. My first Thingiverse part, though I have designed plastic parts to be molded before. How did it fit your setup?

I wasn't paying attention when I exported from SolidWorks. I have re-exported a much smaller part. It still has all of the detail required, must faster download :). Feel free to derive, I only know what I have on my setup. So many people have so many wonderful things on here!