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André Richard
540 followers -
Artist, Engineer, and everything in between.
Artist, Engineer, and everything in between.

540 followers
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Fundy Park - Dickson Falls
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Looooved this show!
There has been a lot of talk about Neil deGrasse Tyson on G+ - and rightly so. He rocks my free world. And now comes word of a reboot of "Cosmos." Which is awesome, though I wish Tyson would focus on his Presidential campaign...

But I wanted to remind everyone of that other science show from back in the day, James Burke's "Connections." If anything, it is more relevant today than "Cosmos," and more in need of a reboot.

Because what Burke explored, among other things, was the relationship of science to society, the impact of scientific inventions on history, on social change, on people. And those are the issues that really seem pressing at the moment.

#neildegrassetyson #carlsagan #jamesburke
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Finally assembled the time-lapse i captured a few days ago. Next one should have much more quality, new 1080p camera to test!
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A few printing tests.

Three blocks printed at different layer thicknesses, 0.3, 0.2 and 0.1mm. The 0.3mm one has terrible alignment, but i forgot to re-print that one. You can see the other two are much smoother. I was impressed by the difference..

I think at 0.1mm if i were to paint it, it would erase all visible lines, whereas 0.3mm for sure i would have to sand down if i really wanted a smooth surface. And that's not always very practical..
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I've been printing!

Actually, I'm going to have to order more plastic at this rate! fun fun! Added a 12v fan to keep things cool, printed a bracket for it as well (of course!), and was finally able to add "supports" for complicated objects with overhangs.

This little dragon can open and close his mouth from a little lever on the underneath. He was printed in 4 pieces (still need to print the horns). (photo 1)

Printing with overhangs - you can see the support material being printed all around the center. It's a bit too thick here, but that's what testing is about!. This eventually printed a mushroom-like shape to test supporting an overhang all around an object. (Photo 2)

AAnd finally, a few things I've printed over the weekend. Looks like this plastic paints quite well with acrylics, so you can see a few of my tests here.
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And we're printing! I picked up some new threaded rod at lunch time and printed some new Z-couplers that i'll be installing tonight, hopefully straighten out that Z wobble. Also printed some 12 teeth gears to replace the 8 teeth gears that came with the kit. Also printed a bracket to hold the electronics.. So yeah, i've been printing :)

I switched to the 0.5mm nozzle to more quickly spit out replacement parts/upgrades, and i'll switch to the 0.35 before i start doing the more "nicer looking" models.
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Woo Hoo! First print with the Prusa 3d printer! Looks like i'll need to replace my threaded rods with straighter ones though, its fairly obvious when it's traveling that it kind of 'wobbles' as it moves.

Other than that, the extruder seems to have trouble "grabbing" onto the PLA sometimes.. i think the hobbed bolt just might need bigger "teeth".. it doesn't seem like it has much to hold on to.

Hopefully in a few days of tweaking and improvements, i'll have a perfect cube printed up! A few details: this is in white PLA 1.75mm filament, 0.35mm nozzle, 0.2mm layers with splic3r, 190 degrees, budaschnozzle 1.1.
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It's alive! [Reprap Prusa Mendel Build]

A bit of a delay until now, but i finally received my Budaschnozzle 1.1 hot end from lulzbot this week, and have been finally getting around to finishing up all these connectors. My fingers are sore (by the end i was bending the connectors with my nails! the metal was softer than i thought), but my 5 steppers and 3 endstops are all wired up. Ramps 1.4 with Arduino mega 2560 loaded with sprinter firmware, connected to pronterface, and i was able to make sure everything worked from that point.

Tomorrow's task is fastening the hot end (you can see it in the bottom right on the table) , mounting the print bed, and start calibrating!
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Build Update: X, Y and Z Axis completed and bed mounted. Working on the extruder / hot end. Any tips/instructions on hot end construction would be appreciated. I have the parts for a NiChrome wire/brass threaded tube with a PTFE tube setup.
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My kingdom for metric bolts and nuts!

Canadian Tire, the only hardware store open past 5pm on a weekend it seems, has no metric nuts or bolts. Someone mentioned Home Hardware might have some.. but they were closed.

Not sure if they open tomorrow, but it would be nice if there were a place that i could go to for all these kinds of components. Also having trouble finding springs for mounting the bed (didn't find any in my kit) and T5 sprockets (i've already broken one plastic one, and the other one made me strip my smallest metric allen wrench).. wouldn't mind going to a T2.5 belt like i had heard some people go to, but i'd need to find a supplier for that too.

I know i can order it all online, but in my neck of the world (Moncton, NB, Canada), that means waiting a week for half this kind of stuff, unless i want to pay 500% the value of the item in overnight shipping charges.

Any suggestions?
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