In which I work with a Heathen Material.

3D Printing
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1

In which I work with a Heathen Material.

This is iteration 1 of a spool, as close as I can get to .627 inches in diameter. I have much better skills in SUBTRACTING metal than I do in ADDING Plastic.

Why .627? Because near as I can tell, that’s equivalent to 15.9155mm…which would give my 50 mm per revolution of the motor.

I wanted 100mm of travel, but the geometry of the printer just wouldn’t let me do it. So all my E-steps math will have to have an x2 in them.

There’s work left to do…for sure. I need to buy grubscrews, and suss out a good way to retain the fishing line, and it’s obvious I need to round off the edges so they don’t wear on the line…and the astute machinists can see where the cutting tool ripped the part out of the chuck when performing a clean-up cut on the other side of the pulley.

Still, you hadn’t heard anything useful from me for a week, and I wanted to show I hadn’t been slacking.

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I am now confident in my math…because nothing brings up math errors like posting something on the internets. I will no take what I’ve learned and make 4 spools for real.

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Yeah, but there’s precision, and significant figures (not that I need to tell you) by the time it goes from 1/16 stepping to 1.8 degree per step to waay out on the gantry to down at the tip…its hard to say what difference a thou either way will have on the math. There’s also the possibility that things will look crappy BECAUSE everything comes out evenly. Issues with rounding errors, harmonics, etc.