I expect the ultimaker heated bed upgrade will be for sale very soon. It is an all metal platform and once leveled you don't have to level again. It's very nice. It's the same design (same parts) as the UM2 bed and z stage.
Keep in mind that some Z screws are not single helix but double or even quad helix. I don't know what "trapezoidal" means - does that have to do with the qty of helixes? So when calculating steps/mm it's how much the Nut moves on one full rotation times 200 times 8. Just set steps/mm to that value.
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anon4321 16
I was hoping you were going to offer a kit. I'll be the first in line...
That price even for a single run isn't too much. I was just looking for companies locally that could do the cutting.
However, having a kit with everything worked out is worth the money even if you include some for your profit. The first thing I saw with the local companies is kerf size and it immediately occurred to me that there are a lot of variables and specs to control to the point of being willing to pay more for something someone (you) have already figured out.
Are you also mounting the linear rods differently? Otherwise, I don't see how you will get the tolerance right with the press fit bearings. The rods will be either too far or too close. Or worse, not perfectly parallel. I assume that is why the original design has so much slop in it....
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