Tag: 3dprinting

3D Printer “Accessories”

3D Printing Accessories

So you’ve got a 3D Printer on your Xmas list, or somehow you’ve convinced your company that they need to get one before the end of 2012 because it’s a tool you’ll definitely need in 2013. (And yeah, it probably is!)

So the big question is… what else do you need?

You may not need any of these things, but these are the things I’ve found useful to have around during the past year of 3D printing. Now, keep in mind, I make a lot of functional parts. Some people just make pretty things, and the amount of extra stuff you need for “pretty” things versus “functional” things may vary. (And yes, I focused mainly on tools/items you need for prints, not the actual printer.)

Drill, Drill Bits, Drill Press
I often make parts with holes, or need to make holes in parts. Sometimes you’ll print a part with a hole that needs something inserted into it, either a bolt, or a rod, or a dowel, or screw, or something else round. Running a drill bit through the hole can help smooth things out and get the hole the right size. Sometimes you don’t even need a drill, but just the bit with a pair of pliers, or a vise-grip, or even a vise. Running the bit back and forth (without it turning) can clean up those edges in a hole.

On occasion I need to make the holes after I print something. In this case the drill press often comes in very handy. Sometimes you don’t know you need the holes, or you want more precise (or smaller) holes than you can get from printing. There’s no shame in drilling holes in a piece you printed. It’s just another tool in the process of making.

There’s also reamers and tappers, but I don’t use those, don’t have those, and won’t get into those.

Files, Sandpaper, X-ACTO Knives (and blades!)
Sometimes part just don’t fit right, or sometimes it’s better to make something a little too large and take of the extra. A set of files (flat and rounded) can do the job. The round ones can also come in handy like the drill bits mentioned above. Sandpaper also has its uses, though any of the abrasive tools will leave the surface looking a bit ugly. Ugly is in the eye of the beholder of course, and if it’s a part you don’t see, it probably doesn’t matter. As for the X-ACTO knife (and blades) they can be used to cut away edges, excess plastic, support material, etc. A good knife always comes in useful. I’ve also used a pair of diagonal cutters on occasion. A bit less precise than an X-ACTO knife, but sometimes it’s the right tool.

Acetone and/or Glue
Sometimes you just gotta stick one part to another part. I’ve heard people mention JB Weld, or Super Glue, but for sticking one piece of ABS plastic to another, I just use acetone. It’s messy, stinky, and tricky to work with, but it does a heck of a job. (For PLA I supposed I’d go with Super Glue, YMMV.)

Rubber Bands, Zip Ties, Tape
The rubber bands are often used in conjunction with the acetone, to hold parts together until dry. There are of course other uses for rubber bands. As for zip ties, if you built a Prusa, you’ve already got a bunch of them! Sometimes they’re the right tool for holding things together… and sometimes it’s tape. I prefer gaff tape myself, but masking tape can come in pretty handy.

What Else!?
I’m sure there’s plenty of other bits and pieces and tools and whatnot that I’ve forgotten (a Dremel tool perhaps?) but I figured this was a good list to get started.

Tags 3dprinters, 3dprinting, reprap, tools

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New Slider Ends

New Slider

If you saw my post about a Motorized Camera Slider, this is a bit of an update, but it’s really more about the process than the end product, so if you’re interested in that, read on!

Slider End (Original)

I was originally using the improved camera slider V2 from our pal Marcus, and it worked well enough, but I wanted something different, so I tweaked what he had.

Slider End sliced

Marcus created his original file (I think) with Alibre Design, and since I couldn’t open it, I just worked with the STL file he provided. I loaded that into OpenSCAD and grabbed a slice of it using this method.

Slider End outline

Once I had a line drawing of the original slider end, I could use it to make my own. I imported the DXF File into Inkscape, my standard for 2D (and 2.5D) illustration.

Slider End outline

In reality, the only parts I really used from the original were the approximate size of the piece, and the two holes for the rods. I could have measured things, but loading up a file as a template was easier. I guess I could have got all fancy at this point, but I just kept it simple.

New Slider End

Once I had my SVG done in Inkscape, and exported a DXF file, it was a matter of doing the old linear_extrude method, like I did for my snowflakes, etc. I saved out an STL file and I was ready to print.

Nw Slider End

Here’s what the final piece looks like. One of the issues I had with the design Marcus created was that the rods only went part way into the plastic. There were screw holes to tighten down some screws onto the rods to hold things in place, but I never put any in. They might have also helped with the twisting issue this design has, but I may explore the idea of a two-piece design that clamps tight with the plastic. Or not… the nice thing is, it’s easy to experiment.

If I wanted to, I could probably make these ends out of wood, which would require just a drill press, or maybe out of a nice heavy metal, which might require drilling, or maybe milling. Both processes are a little messy, potentially more expensive, and require equipment you might not have. The nice thing about 3D printing these is that I can iterate a design quickly, and at a very low cost. I can even make them mostly hollow to save on time and materials during testing, and then make stronger, more solid versions when desired.

Nw Slider End

You may notice the carriage has some zip ties on it. Those are holding the LM8UU linear bearings in place. My original carriage was way too stiff, and without exact alignment (which you may not get with DIY plastic parts) it didn’t slide without some binding. The bearings were 58 cents each (I got a 10-pack from an ebay seller.) The bearings are a little noisy, so if you plan to shoot video with sound, you might have some issues. (Maybe more expensive bearing would make less noise?) As for the rods, they were about $15 each (pricey compared to the other parts) from VXB.com. There are cheaper alternatives depending on length, size, quality, etc. I went with 8mm because those are standard RepRap sizes.

At some point I may play with carriage designs as well. I actually did an early version that used felt instead of linear bearings (another trick from the RepRap world) which makes things cheaper and quieter, which may be desirable in some cases. And of course, I need to revisit the whole “motorized” part of this thing.

Until next time!

Tags 3dprinting, cameras, plastic, reprap, slider

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Happy Hannukah

Post author By Pete Prodoehl
Post date 2012-12-09

Happy Hannukah, everyone! Here’s the dreidel I made. It’s not made out of clay, or even “brey” (which is lead) but it is made out of ABS plastic. You know, the same plastic that LEGO are made of. You can make your own, just grab the file from Thingiverse and print it on your home 3D printer. Don’t have a 3D printer at home? You could always swing by Milwaukee Makerspace, or maybe the next MKE3DP Meetup.

If you’re wondering why the top of the dreidel is a funky black while the rest is white, it’s due to switching filament colors from black to white before printing, but not bothering to clear out all the black. I do this on purpose sometimes, because it causes this interesting effect.

Also, if the handle looks weird, it’s because I broke it and then re-attached it with acetone, but did it upside down. It still turned out very nice, in my opinion!

Tags 3dprinting, dreidel, hannukah, plastic

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Snowflakey

Post author By Pete Prodoehl
Post date 2012-11-27

Here’s a thing I’m calling (for lack of a better name) “Snowflakey”. The idea came from the Kimotion Arts store on Shapeways.

Kimotion Arts has these neat 3D printed ornaments with an object arranged in a circle to make a snowflake-like thing. I dig it, so I decided to dig into it.

The first thing I did was fire up Inkscape and draw a really simple figure. It’s terrible, really, but I did it in less time than it took Inkscape to launch on Mac OS X. I created an SVG file, and then exported it as a DXF file, making sure I converted all the line segments into straight lines first. (Of course there were no curves in this drawing, but if there were, I’d convert them!)

Once I had my DXF file, it was easy to pull that into OpenSCAD, and place six of them in a circle with the following code.


objheight = 4;
objcenterspacing = 20;
objrotate = -70;

for (i = [0:5]) {
  rotate(i*360/6, [0,0,1])
    translate([0, objcenterspacing, 0])
      rotate([0, 0, objrotate]) 
        linear_extrude(height = objheight, center = true) 
          import( "figure.dxf" );
}

The code is not the greatest… in fact there is probably much room for improvement, but it’s the first thing I got working, so I ran with it. My idea for the 3 variables at the top were so you could easily tweak them for different art. Sadly, as you change objcenterspacing and objrotate, they affect each other, so it’s a lot of back and forth between those two values. I also could not find a way to assign a filename to a variable, so your DXF will need to be named “figure.dxf” or you’ll need to edit the import line.

Since my drawing was so terrible I wanted to try something else, so what better than Land recreation symbols 27, better known as “Tennis Man” by most people.

A few quick edits and I had this nice Tennis Man Snowflake for that special ball smasher on your list… (Notice the canvas size of 25mm wide by 35mm high. You can do what you want, but the OpenSCAD code will be expecting something close to that. Otherwise you’ll just have to tweak the numbers even more.)

I decided to try once again to draw something. This one took a little longer than a minute, but turned out just as terrible as the first one I did. Still, maybe you like “Blobby Man” as a snowflake.

How about ants? This one is interesting. Maybe spiders would have been a better choice. (And yes, I know I could probably do the entire “6 items rotated” thing right in Inkscape, but that wasn’t the goal here.)

What about the old nag? No, I’m not taking about your mother-in-law (kidding!) but this fine old horse from OpenClipArt.org, where I get many of the SVG files I use. Export this as an STL file and you’re ready to print it on your RepRap!

If you’ve got an improvement to this OpenSCAD code, by all means, let me know. I’m still very much in the learning phase with OpenSCAD, so I do these things to learn, and because of that I’m open to any suggestions.

Tags 3dprinting, art, flake, inkscape, openclipart, openscad, snowflake, svg

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I heard you like cameras…

GoPro Mount

Yo dawg, I heard you like cameras, so I put a camera on your camera so you can take pictures of taking pictures…

Occasionally 3D printing is accused of being useless, or worse, silly. Well this is anything but silly, and it’s certainly not useless.

GoPro Mount

By combining the hot shoe mount I recently printed along with this Female GoProHD Mount we’ve got the camera-on-a-camera thing down like nobody’s business.

GoPro Mount

So yeah, camera on camera action, courtesy of 3D printing. Yeehaw.

But seriously folks, one of the great things about open 3D printing is that combos and mashups are quite common, and since we’ve first jammed a piece of chocolate into a hunk of peanut butter, sometimes things just go better together.

Tags 3dprinting, cameras, humor