Emergency Exit Light Test Button Poker
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Poker to press the test button on emergency exit light fixture
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Background:
The small business I work for owns a small building that has 18 emergency exit lights. Fire code requires these lights to have a battery backup that must be checked twice a year to verify the battery is in working order. Checking each light requires that I move a ladder around to 18 different places in the building.
A 4-foot long wood dowel rod and this print removed the need for the ladder (for me) - making the process of checking emergency lights much faster and easier.
Reference the included pictures for additional understanding of the intended use.
Design:
Designed in Metric to fit on the end of an imperial 7/16 inch (~11mm) diameter wood dowel rod.
Total print length: 52 mm
Cylinder/shaft length: 30 mm
Cylinder/shaft diameter: ~11 mm
Pokers: 12 mm
Cylinder walls: 3 mm
Print setup:
The .gcode and .3MF files have custom supports included so that the horizontal poker is supported but there are no supports in the cylinder/shaft where the dowel is inserted (supports are not needed in the interior shaft). I added the supports in PrusaSlicer by using “Supports: Everywhere” and then using a cylinder support blocker in the cylinder/shaft.
.20 mm Quality
15% infill (only used in the top 22mm of the print)
3 perimeters (shaft walls are just perimeters with no infill)
Detect thin walls (may not be needed)
No brim - printed on my MK3S+ without a need for a brim
PETG on Textured Sheet
Other factors and potential improvements:
The dowel rod I used is 7/16 x 48 inches (~11 mm x ~122 cm)
I intended to design this for a dowel rod with a diameter of ½ to ¾ inches (~13 to 19 mm) to prevent flexing. The 7/16 dowel rod flexes when trying to poke buttons on the side of a light fixture. When I was buying dowel rods at my local hardware store, the ½ to ¾ inch dowels were only available in length of 24-inch (~61 cm), much too short to be of use. 7/16 was the widest dowel I could buy in 48-inch length.
I stand 6-feet (~183 cm) tall and my vertical reach is approximately 92 inches (~233.5 cm)
The dowel rod and poker add 4-feet (~122 cm) to my vertical reach for a total of ~140 inches (355.5 cm).
YMMV for total vertical reach depending on your height and the length of the dowel rod used.