Author: 3dprinterbank

Calculating a gearing ratio between to different pulleys?

Hey internet,I have an odd situation: A steppermotor with a 40 teeth GT2 pulley which is connected to a 60 teeth GT2 pulley. Now I have a really weird gearing ratio, which I’d like to calculate.Can someone please point me to a formula/calculator or anything like that? http://ift.tt/2b8rl0J

Help with bridging/overhang

I am currently adjusting my Bukobot v2 and get overall nice prints with it UNTIL there is some overhang or bridging. I am printing Hatchbox PLA and use Simplify3d to slice the models.Here are some samples of a benchy I printed and some “calibration test” found on thingiverse. Settings are also in the album (same for all prints).http://ift.tt/2aYjKP0 in advance http://ift.tt/2aO3UHG

What’s better: Thin sheet of PEI attached to glass, or a single, thick sheet of PEI?

Howdy all. I recently acquired a Solidoodle 2 Expert with a 6″ x 6″ print bed, for which I’m trying to come up with a print bed. This isn’t my first rodeo, though. I’ve had a refurb Solidoodle 3 with an 8″ by 8″ print bed for about two years now that has been (lovingly) hacked, modded, and glued together.I’ve tried all sorts of bed surfaces from ABS slurry, painter’s tape, glass with glue stick, to floor tile, etc. Nothing has ever worked for me nearly as reliably, cleanly, and efficiently as PEI sheeting. Seriously, the stuff is absolutely amazing, and I want to stick (heh) with it.Onto my real question – which is better?A thick sheet of PEI on it’s own (perhaps 1/8″ to 1/4″)?, orA thin sheet of PEI (say, 1/32″) attached to glass sheet (either something like McMaster-Carr part #84815K49, or just borosilicate glass from a framing store)I have some PEI sheeting I ordered from Amazon some time ago, and it works, but it’s thin (1/32″). The biggest problem I have with it (at least on it’s own) is that it’s a little bit flexible, and while the thickness is pretty consistent, the flatness isn’t- it’s bowed and from a side view it looks like a parenthesis: (Whatever I do for the Solidoodle 2, I will probably also eventually do for the Solidoodle 3. I’m not too concerned with reasonable cost (I’ve spent too much of my life fighting with prints coming undone). For sourcing the PEI, I was looking at ePlastics, as they have a 12″ x 24″ x 1/4″ sheet of Ultem 1000 for $94 (enough to cut and make beds for both printers). http://ift.tt/2aO3voB