rob wrote:Well, so far I've cut one scanner using the one bearing solution, the one where it's just a press fit and you use nuts as spacers. I'm going to be doing some more in the following weeks. If I hear that there's a problem, we can start looking at these other solutions. There's certainly many to choose from!
rob wrote:The press fit I'm getting is such that it nearly requires an arbor press to get the bearings in. Once they're in, they're not going anywhere. After I installed such an arm on my machine, the movement was as smooth as the two-bearing system.
This will work for baltic birch, but what about softer woods?
As for Fab's concerns... I'd like to put a tolerance in the files, maybe +/- 0.005". Otherwise you can get CNC operators who just speed through the cutting without any concern about quality or accuracy. The vast majority of parts will probably end up being -0.005"/+0.010", but for things like holes and bearing pockets, the tolerance needs to be tighter.
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