How tight should the Nextruders be (compared to the assembiles)?
Hello All,
I'm setting up my assembled 5-tool XL and reached the point where I started installing the Nextruders. I was surprised at how "wobbly" they are when mounted to the assemblies. I can feel the magnets gripping and have attached the flexible strap. The assemblies are completely solid and don't budge, but I'm nervous about the Nextruders shifting during printing moves if they aren't nearly as tight.
Is this everyone else's experience and the design, or did I miss some step of making sure the Nextruders are mounted securely?
Thank you!
Josh
RE: How tight should the Nextruders be (compared to the assembiles)?
At a dock a Nextruder can wobble, mostly around the vertical axis. That is normal. The dock itself must be screwed firmly into the rear traverse. The two hex-screws well tightened after adjustment. Please note that the Nextruder has to be pulled away from the magnets and locked by the belts. Fortunately, the two stepper-motors can work in conjunction to do so.
When attached to the carriage and locked by the two latches it must not wobble. The pins in the tool changer board are spring loaded by rubber o-rings sitting behind the PCB. The overall stiffness is limited but enough despite the whopping heavy weight of a Nextruder. Don't forget to slightly grease the three centering points of each tool changer board.
RE: How tight should the Nextruders be (compared to the assembiles)?
> The dock itself must be screwed firmly into the rear traverse
This. And the included ball end hex wrench is not very good for tightening these down properly. I highly recommend picking up a 2.5mm T-Handle hex wrench for tightening down the captive bolts properly. You can feel the wrench engage with the bolts properly and you can get them good and snug.
Without doing this, they will loosen over time and then you'll get dock crashes.