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Even much later for a reply. But your idea sounds interesting. I might give it a go. I would adapt it by aligning the center part as long as my straight edge is. 500mm. Then put two carriers on it....

Following situation I need to align my linear x rail. The rail is 4000mm long an 20mm wide. So I couldn't afford to mill an edge to lean it on. So I decided to make an epoxy bed 40mm wide and 5mm...

It's actually much less. 1.25 microns over 4m. My assumption prior was simply by linear adapting 1km to 4m. But instead the derivative rises by the sinus

Oh that's interesting to see it's used commercial. I wasn't aware of the fact that the earth curvature plays a role. A quick online research gave me on 4m 0.1mm that's of course significant for a...

I had one idea. But don't know if it could work. To use a water filled container as my ground plane. Then I would electrify it with a small voltage. Now I could attach a probe on my z axis and lower...

Yes I mean horizontal. Any other options to get it fairly aligned?

Hi I am putting my CNC together again i built some years ago. It runs on two linear rails on the x-axis. They are about 4 meters long. I know already how to bring them parallel in y axis. With having...

Oh great thx looks very promising. But will take a while to go through 270 posts :-)

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Hi I am about to build a CNC machine to cut wood and foam. The design has a raised x-axis. The focus is put on speed and less on the ability to cut harder material like aluminum. sizes are 4m x-axis,...