Tag: makerspace

Printrbot

You’ve heard me say that 3D Printing is the Future, and I’ve talked about the MakerBot, RepRap, and other 3D printers, but fairly recently, a new project called “Printrbot” launched, and more specifically, they launched on Kickstarter, where their goal was to raise $25,000 and when the campaign ended they raised $830,827. (3,323% funded!)

You could say there’s a lot of interest in 3D printing…

And 3D printing moves fast! I received a MakerGear RepRap Prusa Mendel about a month and a half ago, and I’m still building it.

When I say “I’m still building it” I should clarify that I only get at most a few hours each week. I’ve been told you can assemble the entire thing in a weekend if you skip meals and sleep. :)

But supposedly the Printrbot can be assembled in an afternoon. And it’s smaller, and lighter, and cheaper. All good things. I’ve heard a few questions as to the speed, print quality, etc. of the Printrbot, but I’m fairly confident it’s well designed and will be comparable to the other 3D printers in it’s price class (even though it’s probably the cheapest right now.)

At Milwaukee Makerspace we’ve got a member with a MakerBot Cupcake, I’m building a Prusa Mendel, and I’ve heard that one member backed the Printrbot project and should have one of those when they’re available.

Oh, I should also mention that a goal of the Printrbot is “a printer in every home (and school)” so right there, I’m a fan… and a backer.

If you’ve ever thought 3D printing was too expensive, keep an eye on the Printrbot project, and see what they can do to change your mind.

Tags 3dprinters, 3dprinting, makerbot, makerspace, printrbot, reprap

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Convert all the files!

Convert all the files!
Thanks Tom!

It seemed like a simple enough request… While at Milwaukee Makerspace we were discussing creating snowflakes on the Laser Cutter, and I mentioned that there should be some existing art on OpenClipArt.org, but it was down that night, so I jumped over to Thingiverse and found this snowflake.

As a bit of background, I’ve been pretty damn good at file conversions in the past. Audio, video, markup, raster images, anything 2D has been pretty simple. I mean, I’ve been using Photoshop since version 1.0.7. I know how to deal with that stuff… but 3D? It’s a whole new ~~nightmare~~ world!

Snowflake

The file was an STL, which is meant for 3D printing, but we needed more of a 2D vector file. I know how to load a DXF file into the Laser Cutter, so I figured I’m import this STL into Google Sketchup (via a plugin) and then export as a DXF (via another plugin) and that would be it.

Well, that didn’t work. (Oh, and by “didn’t work” I mean I was unable to open the DXF file in Inkscape. At this point I was still waiting to use the Laser Cutter so I didn’t get to try importing it on that machine. I figured that as long as I was waiting, I’d try to get a format I knew would work.) On to the next idea.

I exported the STL from Google Sketchup as a DAE file, and was able to open that in MeshLab. Once again I tried a DXF export, but that one wouldn’t open in Inkscape either. Argh!

Snowflake

So I made a radical decision… Since I could view the file in MeshLab, I just did a screen shot so I could get a nice, clean 2D version of it.

Snowflake

Of course if I had known I was going to do this, I probably could have just done it in Google Sketchup by altering the view… Still, the MeshLab method seemed solid.

Snowflake

I then took the screen shot and opened it in Photoshop, did a little editing, and converted it to black and white. (I considered creating paths, and exporting them, but at this point I wanted to go with what I knew (or thought) would work, and that meant getting a clean PNG file into Inkscape to convert it from a raster to a vector file via trace bitmap.

Snowflake

So finally, I had my SVG file! A vector file I could open in Inkscape and export as a clean DXF file that I was reasonable sure would open and work on the Laser Cutter…

Snowflake

Oh wait, at some point along the way I had created an OpenSCAD file, to test the other DXF files. They wouldn’t render due to some weirdness, but the new one I exported from Inkscape did. This made me feel a little more secure that this file would work.

So how did it turn out? I don’t know!

The Laser Cutter was in use making ornaments, and I couldn’t stay late enough to get a chance to use it.

And just to be clear… while there were many steps in the process above, the whole thing took about 20 minutes from the first file export to getting what seemed to be a good DXF file.

I’ve converted a lot of files in my time, but doing so for these CNC machine is proving to be a new challenge.

Of course half the fun is seeing if it will work, you know, on the machine… which I hope to test at some point. :)

Tags 3d, dxf, inkscape, makerspace, meshlab, openscad, photoshop, sketchup, snowflake, stl

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Fire the Laser!

Post author By Pete Prodoehl
Post date 2011-12-04

I finally got some quality time with the Laser Cutter at Milwaukee Makerspace, and I have to say, I’m fairly pleased with the results!

Milwaukee Makerspace Logo

I started with the Milwaukee Makerspace logo (in SVG format) in Inkscape, and exported it as a DXF file. (I also kept the stroke of the width just 1 pixel for all the lines.)

Once I had a DXF file, I was able to import that into CorelDRAW, which is what the PC that controls the Laser Cutter uses to do the work. There’s a bit of trickery in CorelDRAW between raster and vector artwork, but doing it this way with a DXF file at just one pixel wide seemed to force it to work in vector mode, which is what I wanted.

Knowing the power and speed settings for the Laser Cutter are tricky, and require a bit of experimentation based on if you are etching or cutting, and how deep you wish to etch or cut. The nice thing is, as long as you don’t move whatever your material is, you can run the Laser Cutter multiple times to go deeper, or complete a cut. In many cases this may be the way to go… (More on that later!)

It’s worth noting that some materials should NEVER be cut. Since our pals at PumpingStation: One already have a list, I’ll point you to the NEVER CUT THESE MATERIALS list on their their wiki. The also have this cool list of laser settings. (Yeah, we’re working on that as well. We have a different laser, so we need to start from scratch.)

Here’s a close-up of the etching into wood. I ran it a few times. If you’re doing a vector cut, it just traces around the outline, and goes super-fast. If you are using raster artwork, it’ll behave like an old dot-matrix printer and go line-by-line and take forever. Shane did this Periodic Table and it took almost two hours. (It does look pretty amazing though!) I’m still not 100% sure what CorelDRAW does with each format. I tried to import an SVG file but it seems to convert it to raster format. The DXF kept its vector format, so I’ll stick with that for now.

After I was satisfied with wood, I moved on to plastic. When I say plastic, I mean “plastic” and I don’t know if it’s acrylic, or plastic, or what kind of plastic, or anything else, so I’ll just leave it at that for now. (And yes, we’ve got a nice scrap pile of plastic at the Makerspace to experiment with.)

This is just an outline of the logo, but we should be able to use a filled-in logo (in raster format) and create the effect of frosted glass, and then we can do this Floating Glow Display project from Make with our laser-etched plastic. Hmmm, it looks like I just gave myself another project to tackle!

Tags inkscape, lasers, makerspace, milwaukee, plastic, tools, wood

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Holiday Make-A-Thon 2011 ReCap

Post author By Pete Prodoehl
Post date 2011-11-28

I had a fun time at the Holiday Make-A-Thon and everyone else there seemed to as well…

There was painting, and decorating, and soldering, and knitting, and 3D printing, and gourds, and ABS, and PCBs, and yearn, and glue, and even some glitter!

Big thanks to the Milwaukee Makerspace guys for teaching people to solder, and for helping me out with the wooden ornaments. More thanks to Bucketworks for hosting the event. Based on the feedback we got, I’m going to assume we’ll do it again next year.

Here’s a few snapshots I got during the event.

Ornaments

Some of the wooden ornaments painted and glittered up. (Thanks to Brant from Milwaukee Makerspace for the googly eyes.)

Penguin

I’m not 100% sure but I think this dried gourd penguin was made by Amanda from Milwaukee Makerspace. (Please correct me if I’m wrong.) My kids told me it was the most awesome gourd they saw all day.

Reindeer

These reindeer from Brant are extra-cool because they were made from the scraps of the first test of my cucoloris design. They were sitting around the space near the CNC Router and he found a neat way to upcycle them.

Starclops

I may be biased, but Starclops, which was created by hot-gluing a star ornament onto a snowman ornament, adding a googly eye, and using a soldering iron to brand it, may be the best thing I made that day.

And finally, thanks to all the folks who showed up. Rather than battling the crowds at the malls you opted to join us and make something with your own hands… and that’s pretty cool. We need more of that in this world. :)