Back into 3D printing world

Over 3 years ago, I got my first 3D printer (Prusa i3 clone).  Looking back, it was a really crappy printer, but I did make few cool things with it like bracket for CO2 laser tube, laser beam combiner bracket,  lens aliment jig, miter saw vacuum port adapter, etc.

It was always a pain to use […]

October 23rd, 2017|3D Printing|0 Comments

T.H.O.R. Rover: First Prototype

This is second part of my build log of the T.H.O.R. Rover. Please see first part (concept and idea) here.
Components.
Motors and Frame

Because I based my rover on rocker-bogie platform with skid steering drivetrain (think steering a tank, turning is accomplished by rotation of one side in one direction and other side in the opposite) I needed 6 […]

September 22nd, 2017|3D Printing, diy, Laser machine, robotics|0 Comments

Journey into robotics. The beginning of T.H.O.R. Rover

Robotics is fascinating and complex topic.  I’ve always wanted to dive into it headfirst, but seeming complexity, cost in both time and money has stopped me so far. Finally I decided to dedicate some time and explore this subject by building my own robot.

Hopefully this will be a series of articles on the build progress, […]

September 22nd, 2017|3D Printing, diy, robotics|0 Comments

How to add beam combiner to SH-G350 laser cutter

CO2 Laser cutters are insanely cool, but there’s one problem. We cannot see infrared beam, so it’s always a guesswork where laser is actually will hit the work piece. Many laser cutters including SH-G350 come with a red laser pointer attached near head cone, but they are far from accurate.  One that came with my machine annoyed me to the point that I disconnected it completely. It never points to where laser is cutting (mine was about an inch off to the side) and it can only be adjusted up or down. Spot gets larger or smaller depending on where your z-table is located. And to make things worse,there was something wrong with mine as it kept on overheating and fading.

So what is beam combiner and why would you want one?

As you can see from the illustration beam combiner is a special lens that only let’s certain wavelengths thru, and reflects all others. In our case Infrared laser beam passes thru it, while visible red laser reflects. By adjusting angle of the lens you can get both beams to travel same path.  You can actually see where IR laser beam is going and where it will end up on the table!

No more guessing, where you cut will be. As added bonus this makes it insanely easy to align mirrors. You don’t have to burn pieces of paper anymore! But wait, there’s more 🙂 ZnSe lens will also focus red laser beam, so you can even see if focal distance to the object is ideal!

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July 10th, 2015|3D Printing, diy, How To, Laser machine|0 Comments

3D printed Miter Saw to vacuum hose adapter

Recently I upgraded my Ryobi 10″ compound miter saw to a Dewalt DW17 (Type 3) 12″ saw. As I don’t have dust management system in my garage, I always hooked up my Craftsman 6HP shop vac directly to saw’s exhaust. Shop Vac’s hose is 2″ ID so it fit nicely my Ryobi miter saw (it […]

June 30th, 2015|3D Printing, diy|0 Comments