Two tricks

IMG_0399.jpegIn this post I’d like to show you two little tricks concerning 3d printing. I didn’t invent the first one (it’s rather a well known procedure to stick foil to smooth surfaces without bubbles), but as far as I can tell, the second trick is something new.


1. No bubbles, no troubles

When printing with a heated build platform, it turns out, that Kapton tape is a great surface for ABS printing. The only problem is, that normal Kapton tape is rather fragile and easily get ripped off the build platform when removing printed parts. Therefor I use 10x10cm sheets of glass with a layer of Kapton tape on top as exchangeable build surfaces on my heated platform.


One problem is to get the Kapton tape on the glass, well aligned and without bubbles.


The trick is to use soap, water and a scraper. Here’s a short how-to video, I made:

2. Snap-in, not snap-off

I recently designed a printable Tricopter:IMG_2055.JPG

One special thing of this design is, that the Tricopter is foldable for easy transport:


For this, the printed center piece (below the plywood platform) has two snap-in hinges for the front arms:

I’m sure, there are several other applications for this technique.

Speaking of technique, slightly off topic, but maybe also interesting:
A “mechanical disadvantage” of Tricopters versus Quadrocopters is, that in order to countervail the unbalanced torque of the three propellers, one of the motors needs a tilt mechanism (Quadrocopters use two CW propellers and two CCW propellers to self balance the propeller’s torque).
This tilt mechanism is usually one of the more complicated parts to build on a Tricopter. Here’s the tilt mechanism I designed for my printed Tricopter:



  1. Have you shared your design files anywhere?
    I just recently got the idea in my head that I should be building stuff that flies, and this looks like just the ticket.

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