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Starfish

by sconine, published

Starfish by sconine Sep 9, 2011

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Summary

My kids love the octopus, and kept asking for a starfish. This did the trick! I drew this in sketchup freehand. It took quite some time to get the surface right. Looks very topographic once printed. A great flat bottomed animal for the Makerbot. Perhaps a flounder is next up :)
Update: This prints really well if you scale it up as well, I've printed it so that it just fits on the build platform, takes a bit longer, but comes out great. Sort of neat that the ends of the feet tend to curl up a little due to the heating/cooling of the plastic.
Was very odd but overnight these things crawled up on a few rocks I'd left on the table...
Update 10/15/2011: if your original needs a companion, check out Squiggly version.

Instructions

I print these using raftless printing configured basically how they describe on the makerbot wiki (http://wiki.makerbot.com/thingomatic-doc:raftless). The modifications I made are: 1) I changed the Object First Layer Feed Rate Infill Multiplier (ratio) to be 0.5 2) I change the Object First Layer Feed Rate Permieter Multiplier (ratio) to 0.5 3) I changed the Object First Layer Flow Rate Multiplier (ratio) to 0.9 4) I disabled the Outline feature and generally delete the lines of gCode that do the warm up extrusion.
These changes make the first layer go down slower and a little wider/thicker so that it adheres to the platform very well. I was noticing that the outline and warm-up extrusion generally left buggers or lines of plastic that then caused the early layers to peal off. The changes above fixed that.

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Great design. Just printed a hundred of these scaled down in various materials and colors for an Island themed craft project for my daughter. They look great very small also - really prints easy (PLA, PETG, ABS - all with no problem). Thanks!

This is fantastic! Love the realism.

This was the first thing I ever 3D-printed. Ah, memories...

Wonderful :-D

These little guys print great on my Replicator. 10% infill, .2mm layer height. I scaled a couple up by 1.3 as well.

I got a question on email about drawing these, so figured I just share here... So to draw this in Sketchup, I draw the flat surface first, then I draw lines straight up off that surface in various places to the height I think I want. I then use these as reference points for the tops of arcs that I draw (start/end of arc is on the flat bottom surface). I set the segments for the arcs at like 12 or 24. After a bunch of arcs are in place I then draw a ton of triangles to connect the arcs together and form a closed surface between them.

I then print and see what it looks like, typically I don't get it quite right the first time and have to tweek the lines and arcs and re-try. Quite time consuming... but fun. There is probably an easier way. Feel free to download the sketchup file and have a look if you want.

This is such a wonderful early print. Even with Z-height, layer height, and filament diameter uncalibrated it still prints as a cool, textured organic looking thing. It was the 3rd thing I printed, after two 20mm cubes. I handed it to my wife and suddenly she understood why I am so excited about 3D printing. She commissioned me to print two more, so she can make a sea-themed necklace.

Thanks for promoting domestic harmony ;)

Ahh heat guns is there anything you can't do...

Could you share the sketchup file? I would like to add a hole for a magnet.

Thx

Sure, just uplaoded it. Would love to see some modifications!

Can anyone share with me the secret to printing differences colors at different layers? How do you go about switching out colors during the build without messing everything up? Thanks!

Best way I've found is to clip the filament with some nail cutters close (just above) to where it feeds into the extruder and then follow this cut end in by pushing the next color in on top of it as it feeds into the extruder. Takes a minute or 2 for it to start extruding but is the best for not messing up the build. Other option that works OK is to click Pause (preferable while it is in the in-fill stage and not doing the outline if you can time it right, there is a little pause) in ReplicatorG, pull out the current filament and stick in the new one. This makes the color start to come out a lot faster, but does cause more risk of bubbles, air pockets, etc... Good luck!

Thanks! I will have to try it sometime. Using the pause method was the way I was thinking you could do it but I like the idea of simply feeding it in by hand after cutting the first one a little better.

Or use a filament joiner - http://www.thingiverse.com/thing:9850http://www.thingiverse.com/thi... then you can print it all in one go.

Filament joiner for multicoloured printed 3D objects
by RichRap

Love the starfish model, great job.

In my print the white ones are original size, the Captain America one is 1.5 x size and evil looking lemon yellow and red is 2 x sized.

Glow in the Dark starfish would be cool. I would guess there are more ABS filament colors than the standard green ... placing glow-in-dark versions in a real tank would be an interesting effect. :)

Awesome Mr. Co9! :)

They look AMAZING melted onto those rocks...

Great work!

it looks really cool printed at .25 mm layer height on my cupcake mk5

Haha! What did you do? Put them on top of rocks and then heat them in the oven to melt them over?

Exactly :) They turn into a sort of gummy bear consistency. Cradled the in aluminum foil and ran cold water over the plastic to harden it. Was hoping they might just slump on their own, but they were a bit springy and didn't want to lay down.

Love this! It translates really well to the colours you chose.

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