Nasa Space Wrench (actual file from Nasa)
by nibblernibbles, published
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Summary
Hot off the press .... 23rd December...just in time for Christmas.
This is the first ever tool emailed to space and printed in orbit!
I haven't even had time to print it yet, it's that hot.
I found it here:
http://nasa3d.arc.nasa.gov/detail/wrench-mis
...but the file wouldn't download on either IE8 or Firefox.
It did download on Android, but wouldn't agree to being transmitted to a PC. Finally I made it work by zipping in Android and transmitting the .zip to the PC.
I guess the engineers in Nasa, despite their brains the size of planets, forgot to change the file permissions?
Anyway, here it is for all Earth-dwellers to enjoy!
UPDATE:
I did a print in PLA on my K8200. 0.2mm layers.
I think the centre section is meant to turn and ratchet. But mine fused together :o(
Think the clearance needs to be increased for mere earth-bound printers.
YMMV....
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My brother and I printed this at .06 instead of .02 as our third ever print to test our ANet Prusa - so although it is a beautiful print, it was not high enough res @ .06 for the moving parts to work. I will reprint this @ .02 higher quality
I printed this tool. I was amazed that it worked. I wish it would work in both directions, though. I am not sure if it was designed to operate like that. It is still amazing, though.
you can always mirror it so it works in the opposite direction
I printed this on a Replicator 2 using PLA .1mm, 2 shells, 25% infill. Finished in four hours. Is it appeared to be pretty fixed, I stuck a metal socket on to it, clamped the socket in a vice and then gently tried to get it to start moving. I guess I was not so gentle because it broke the square head off of the wrench without loosening the internal parts.
What settings should I try in order to make the internal parts less connected?
I sliced using craftware .4mm extrusion width, .3mm layer height, 30% triangle grid infill, 45mm/s speed and everything else left alone. Printed on my da vinci 1.0A with hatchbox abs, and it works fine. If anything the tolerances could be tighter, because the mechanism is very loose to the point that it can almost come out.
Printed in PLA at 0.2 mm layer, 3 shells, 25% infil on my Dremel and it works great.
Printed 1 in ABS at 80% infill 0.2mm layer hight and 3 perimiters. It turned really easly but does not work(spins in both directions and does not lock) seems too much clearance.
Success on the 2nd try... Printed on a Mendel90 in PLA with the extrusion reduced to 90% (the 100% version broke before I managed to work the rotor free), 0.1mm layers, 0.5mm walls, 50% infill, 80mm/s on Cura. The ratchet took a turn to free up properly. The entire print took just over 2 hours.
I would recommend printing in ABS like what Nerdgasum did. look up his video on youtube.
I successfully printed a working wrench, after a few (11) failed attempts. I printed it on a printrbot simple metal, at 196 degrees, .1984 layer height, 25% fill. My early attempts were ruined by the bar piece lifting off of the table, because of a persistent blob that would ultimately become stuck to the hot end. I ended up just pushing the bar piece down, after each layer until the piece was large enough to print better.
Tried 2 print on the makerbt mini with the pla but alas no joy. still very cool to see it made and just gives me more reason to try this again at a later date.
I printed one on a Replicator 2X . 1mm Layer height, 25% infill, 2 layers , on a raft. and it did not work.
Anyone using PLA and/or Replicator 2 able to give me their print settings? I've tried 3 versions now with different infill and none have worked.
0.1mm, 2 shells, 25% infill. You might think the ratchet is fused, but if you rock it back and forth with a fair amount of force it should snap loose. It took me a little while, but it works just as advertised.
Here's the site I downloaded mine from, using IE:
http://nasa3d.arc.nasa.gov/detail/wrench-mis or http://nasa3d.arc.nasa.gov/
Printed in PLA at 0.1 mm layer on my Bukito, no support. I had to apply a wrench to loosen it up, but having done that it ratchets well.
Anyone know what material the ISS folks printed with, I'm measuring about 2 inch-pounds of torque on mine. Not too shabby though.
By the way, I'm a bit surprised it's labeled in inch-pounds and not newton-meters...
Nasa is american after all, so imperial measurements should be expected.
Imperial measurements is what Darth Vader would use.
"Please fill my automobile with one bushel of your finest gasoline good Sir!"
"ISS printer is ABS."
Strange. ABS has worse layer adhesion than PLA. It delaminates pretty easily. It has alot of things going for it to like chemical resistance and such. Im using ABS myself. Moulded ABS is stronger than PLA, but when you print with it then it's reversed.
Id think they would use nylon or something in space. You can't easily glue nylon (Tough you can heat weld it) and it soaks up ambient moisture (Then you get annoying little bubbles in your print as the trapped water becomes steam.), but in all other respects it is pretty much the strongest common 3D-printer filament out there. A plastic bag around the spool and some dessicant solves the moisture problem.
They use ABS on the ISS. That's all they can print with using their custom made and highly advanced 3d printer.
ABS layer adhesion is as strong or stronger as PLA if print temperature is correct. Many hot ends do not have the correct temperature calibration and ABS ends up printing with a temperature that is too cold. I have have an E3D V6 lite and always crank up to the max. 245C for better adhesion results. I have just got an E3D V6 All-metal clone and will be experimenting with 250 and up for large ABS prints without cracking to attempt this:
http://forums.reprap.org/read.php?262,434083
Printed perfectly in ABS on my Up Plus 2. No support needed, and it rachets like a champ. I printed using 0.15 layer height and high quality mode.
with side does it rotate? did it came out already ratcheting ??? Mine does not work, printed 0.2 mm no sports
It rotates in the "tighten" direction, and ratcheted just fine as soon as I removed it from the bed. I think the internal clearances are fairly tight, so if there's any sloppiness in your printer it might fuse the parts.
This is probably obvious to most up here but it wasn't official documented so here you go. If you mirror it then you have one that will ratchet in the "lefty loosey" direction. Printed both on my QU-BD One-Up without scaling, just had to rotate 45 degrees on the z and works like a champ after a little clean up around the ratchet head.
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