The SCARA is based on a scaled down remix of Woobag’s design. I’m using Bart Dring’s TMC2209 Pen/Laser Controller V2.0 (since retired) running Grbl_ESP32.
I decided to see if I could come up with an enclosure that could be fully 3D printed on my Prusa i3 MK3S+ printer. I finally arrived at what reminds me of an inverted Devo Energy Dome from the 1980’s (google it). It took about 1.5 kilograms of filament but I am pretty happy with the results. To fit within the Prusa build envelope, the enclosure is constructed in three tiers with each tier segmented into three or six sections. The vertical walls of each section end with one half of a rounded dovetail shape. When combined with the adjacent section, a full dovetail is formed that fits into the corresponding dovetail slots in the legs.
A few screws lock it all together and it becomes surprisingly rigid. To keep everything aligned and centered, the removable sand/LED tray registers on the upper tier screw heads and the decorative LED mask clocks onto the tray.
I’ll probably have to experiment a bit with sand types and the sand substrate. Drawing a pattern is a little ‘crunchier’ than I would like. The SCARA output in Sandify seems to work perfectly (you can probably remove the ‘experimental’ qualifier).
It looks really good. A smaller table has a lot of advantages in terms of total commitment and time to finish the patterns. This one has a very good finish.
You’re right. The experimental comment is not needed.
The sand substrate is 3mm plexiglass sandwiched between the black 3D printed segments. I agree…the LED’s need to be more recessed. I would like to come up with a way to reliably secure the the 6 upper and 6 lower segments without using so many (24) small screws and nuts. If I figure that out I’ll recess the LED’s at the same time.
