New build - Steel - 3 Axis initially then conversion to 4 axis.

[Tom J]

Pretty smoothly. I do have a video of it turning by hand..

https://youtu.be/lEZzJ3c4UJA

I think the reason for the success in motion is the heating of various sections during the fabrication process.

I like working with steel because it warps and moves when heated.

When designing the Z most of the welding occured on Job with clamps. As the steel heats and warps it smoothly contours around its pressure points. I.e: the fasteners on the bearing blocks and the tension applied by the SBR25 rail.

Not to mention meticulous time spent hammering the fudge out of it at times :) the outer walls were hardest. They have a slight warp in the 6mm and needed lots of bashing and even driving the car over it.

Cutting a square for the ballscrew bracket was the best idea. As it allowed me to drill it then weld it back in with just the tension of the ballscrew to warp to.

There really was no other way though. Accessing the correct drill points would have been almost impossible to get right as it was completely blind.

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My first bed was ok till I weld those flat bars 8mm thick - it warp badly in the middle