The Z Coupler!

Creality CR-10 series 3D printers
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LePaul
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The Z Coupler!

Post by LePaul » July 31st, 2017, 9:56 pm

Lot's of people reporting issues with theirs....looks like mine is started to turn into a Slinky too
cr-10-coupler.jpg

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Dim3nsioneer
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Re: The Z Coupler!

Post by Dim3nsioneer » August 1st, 2017, 3:57 am

Did you never have problems with shifts in z direction? I tried a flexible coupler on my UMO once and then immediately removed it again.

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Roberts_Clif
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Re: The Z Coupler!

Post by Roberts_Clif » August 1st, 2017, 9:14 am

Dim3nsioneer wrote:
August 1st, 2017, 3:57 am
Did you never have problems with shifts in z direction? I tried a flexible coupler on my UMO once and then immediately removed it again.
No.

Though bought a used Hictop an they shipped it assembled sort of.
They removed the top Aluminum Frame an laid into a box loosely with the steppers still attached to the couplers and lead screws.
You probably figured out the couplers were stretched beyond belief, could not help but LOL when I saw your couplers, as it reminded me of this.
Last edited by Roberts_Clif on August 1st, 2017, 2:40 pm, edited 1 time in total.

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LePaul
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Re: The Z Coupler!

Post by LePaul » August 1st, 2017, 10:16 am

Dim3nsioneer wrote:
August 1st, 2017, 3:57 am
Did you never have problems with shifts in z direction? I tried a flexible coupler on my UMO once and then immediately removed it again.
The remarkable thing is that the printer is doing some amazing prints, but I do need to replace this with something better.

Several others have had this happen and this seems to be the replacement they suggest.

http://a.co/dacDwfT

They also suggest making sure everything is aligned, checking that the z screw lines up with the stepper. Some use a spacer to adjust the motor over a bit. I am not sure if this happens in shipping, from being banged around....or poor quality control.

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Roberts_Clif
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Re: The Z Coupler!

Post by Roberts_Clif » August 1st, 2017, 3:00 pm

Make your choice - Choosing a Coupler
https://www.nbk1560.com/en-US/products/ ... epage_012/

MBB-C - Bellows-type Flexible Coupling " 1st Choice"

Most coupler's can be found here
https://www.nbk1560.com/en-US/products/ ... fgodMjII5Q

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jonnybischof
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Re: The Z Coupler!

Post by jonnybischof » August 11th, 2017, 9:13 am

Omg, is someone seriously still doing that :D

It really doesn't take a rocket scientist to tell that using a flexible coupling there is a really bad idea. I'd also recommend an Oldham coupler similar to the one you found there on Amazon. Personally, I'd go with a quality brand product, but these things can be quite expensive (Misumi Oldham couplings cost 15+ EUR, and that's the "cheap" ones with grub screws instead of the clamping design).
Best regards,
Jonny

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LePaul
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Re: The Z Coupler!

Post by LePaul » August 11th, 2017, 9:46 am

TinyMachine is supposed to be carrying better replacements soon. I don't mind paying more for quality

5mm to 8mm

I checked out the links @Roberts_Clif gave and got 105 results. Yikes! Which one!

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Roberts_Clif
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Re: The Z Coupler!

Post by Roberts_Clif » August 11th, 2017, 10:49 am

LePaul wrote:
August 11th, 2017, 9:46 am
TinyMachine is supposed to be carrying better replacements soon. I don't mind paying more for quality

5mm to 8mm

I checked out the links @Roberts_Clif gave and got 105 results. Yikes! Which one!

I did suggest the MBB-C - Bellows-type Flexible Coupling " 1st Choice"
Image1.jpg
Image1.jpg (12.23 KiB) Viewed 948 times
I agree buying a better replacement part is the way to go.

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