- November 27, 2016 at 10:37 pm #21639
Just posting what I’ve got so far. This is using the 0.065″ walled stainless steel from Speedymetals, with midspan supports on the 7′ axis.
Attachments:November 28, 2016 at 4:44 am #21642
Holy crap!November 28, 2016 at 8:36 am #21645
Heh, just in time to become obsolete with the new Crawlbot-ish version on the way..
I’m more hopeful about this than I was a few days ago.. With the loose gantry rails (i.e. they don’t have the top pieces on to prevent bending) I’m getting about 1/4″ bend if I put a lot of weight on it in the dead center. I’m hoping to have it up in running in time to make xmas gifts, but who knows..November 30, 2016 at 8:49 am #21841
So I got everything tightened down yesterday and measured the distance from the base to the cutting tool in various locations. So far I get a difference of ~2mm between the most supported spots (corners) and the center. Pushing hard on it can get it an extra 2-3mm closer to the base.
I haven’t put mid span supports on the 4′ sides yet, and I’ll try to avoid doing so — it would be really nice to be able to just slide a long piece in.
Of course, this is no indication that it will actually work out, but so far I think it’s encouraging. If I can keep the error at 2mm or less I think I’ll be happy.
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