Archive for June, 2013

Bluetooth Keyboard Caps

Saturday, June 22nd, 2013
Redesigned Keyboard Cap

v1.0, pictured below, proved lacking.

v2.0, in red, appears at the left.

The size difference between the end cap and the bit that rests against the end of the keyboard was widened considerably. The old piece would slip over the keyboard and the closed end would activate the power button. The open end combined with the wider overhang, seems, so far, to be a better, more durable, design.

Yes, my printer’s belts need to be tightened.

Thingiverse Updated.

Apple BT Keyboard End Caps

Recently, I’ve been carrying an Apple Bluetooth Keyboard with my iPad mini so I can compose relatively long emails. Nothing beats a keyboard for text entry!

While I love the keyboard, it does have an annoying habit of turning on when floating about my murse.

A few minutes in Autodesk Inventor Fusion and I whipped up some printable caps that slide over the ends of the keyboard. The cap protects the power button from accidental activation (there are two styles of caps, one more defensive than the other) and by placing a cap at both ends, they can be left in place while using the keyboard and it remains level.

The STL files and some more photos can be found on

Aside: I clearly need to reprint that piece. I had some schmutz on the print bed, leading to the end not being smooth. That and it looks like my belts need tightening. I’ll switch colors to clear and re-print someday soon.

Aside^2: Something snapped in my brain since the last time I messed with Inventor Fusion. In particular, I went from nerver using to completely embracing the construction feature. Basically, construction allows you to place axis or planes relative to features on the model. Thus, if you want to bisect the model to, say, make the inside wall of a tube a bit fatter for a few millimeters near the end, you simply place a plane parallel to the end face, offset a few millimeters into the tube and then bisect the model with the plane.