Safety day counter sign Robot/Meteor/Lasers

I browsed for some wall art to embellish the empty stair case wall below my flat. The robot attack sounds just right for a last thought when leaving the house.

To make it a little more difficult to remove, I designed an additional wall mount for earthquake-resistant fit.

Design

Changes to the original design

• number tags will not hang, but slide in; allows three numbers
• three options for wall mounting
• three classic disasters to choose from
  • robot attack
  • meteor strike
  • laser attack
• numbers 0-9 complemented with infinity tag, and minus tag to allow for forecasts
• useful when modifying the attached STEP files to cover for your personal disaster/safety awareness: the font used is from the transport family, available from https://www.roads.org.uk/fonts and used under Open Government Licence v1.0

Assembly

The number tags are intentionally a smidge too high. After a couple of swaps, they are easy to push in and out, yet still earthquake-resistant.

Mounting Options

comes with three choices for wall mounting

by cord

this requires two screws 3mm x 5mm (0.12" x 0.2") and a cord that is knotted into a loop

by magnet

four recesses allow for up to four magnets ø10mm x 5mm which can be fixed with a drop of glue

by wallmount bracket

a separate part to print, requires an M3 countersunk screw (>12mm), and an M3 square nut to lock the sign; and of course two screws to attach to a wall. The holes allow screws up to 3.5mm (0.14"). Centre line markings may support positioning.

wallmount assembly

it's a good idea to level the block before tightening the wall screws (don't forget to put a mark on your finger too). 

Fixation happens with a screw driver to the mounted block: I chose an inhex screw, the blade of the driver should be relatively long: a standard 2mm allen key won't reach the screw, but an electronics type or a long allen key with ball head will do. Turn the screw anti-clockwise to lock.

Printing

I chose ABS, but every other filament should work fine. ABS will warp by a couple of millimetres, but didn't cause trouble in practice.

Find the attached sample .3mf files to see the colour change height. Printed fine without supports.

My print is 230 x 180 x 6mm. You may scale that down, but please consider screw/magnet holes getting smaller, and the typography may need a smaller nozzle than 0.40mm to still work.