Is there a trick of some sort to get the x-belt belt inserted with the screw into the slot on the Ymin side of the LR4?
It seems incredibly tight and just doesn’t seem to want to slide down in there. Partly, it’s like the hole in the z-stub is too small, but the slot in the plate is also extremely tight.
(Admittedly, I tend to be paranoid about forcing things when plastic is involved…)
It is a tight fit, but that is by design so the belt cant slip once inserted.
I use a screwdriver in the screw to push down into the printed part, and at the same time some needle nose pliers from the bottom just outside of the aluminum XZ plate pulling down on the belt. Alternate force between the screwdriver and the pliers and slowly work the belt down to the bottom of the slot.
This was, by far, the hardest part of the build. The pliers idea sounds good.
@Bruce, were you able to install the x-belt?
It seems its extremely hard to slide the belt into position (the bigger slot at the end, 3.2mm). The entrance slot is 2mm and the thickness of the belt is 2.5mm ( belt teeth locked together).
Yes, I did manage to get it in. However, I literally had to hammer it down into the slot.
It seems that this slot is unnecessarily tight.
For various printers with various amounts of slight over-extrusion, it commonly makes outside dimensions slightly large, and inside diameters / dimensions slightly small. In an opening that tight, even a slight about of difference between calibration of printers, can affect the insertion process a lot.
A hole in a part can be revised after printing either by drilling or by heat, such as pressing a hot screwdriver in to slightly widen out the hole. In parts like this that are small and easy to reprint, it’s not a great loss if you mess it up and have to start over. But hopefully getting extrusion calibrated (edit the extruder motor’s “step” value) can aid with such issues in the future.
I did get the belt in but had to use a flat-head screwdriver and tap it in with a hammer. The printed part had enough clearance but the milled aluminum was tight. The belt ended up having some slight damage from this but not enough that it caused an issue in performance. If I had the patience I would have taken the aluminum plate off and filed it slightly but in the end, the machine works and I am cutting stuff.