Comment on Linear rail mod on Anycubic Kobra 2
DreadPotato@sopuli.xyz 7 months agoI thought your frame acts also like a rail for wheels.
There is a single extrusion, in the middle, running parallel to the Y axis below the bed, with rods on both sides that the bearings travel on. So it’s not affected by the squareness of the frame.
Likewise for the X axis, there is a single extrusion mounted between the two vertical extrusions, with rods on that the print head travels on, again this is not affected by squareness either.
Squareness of course comes in to play when the print head is positioned relative to the bed, but I actually have decent (and consistent) print quality.
rambos@lemm.ee 7 months ago
Using single rail for each axis would exclude most of the issues I was concerned about. When I mentioned frame squareness, I was thinking about all geometric tolerances including rails being prallel/perpendicular to the frame.
Honestly my knowledge about linear rails becomes kinda useless after seing how people use them on their printers. Example: mounting them on alu extrusions or using them as a frame should be wrong, but looks like many people have good results.
Again, someone who solved that issue on the same or simmilar machine might be much more of a help than anything I wrote