What happens if you spray it on a software developer?
Started work on the scanner frame redesign today. I tracked down the STL files on Thingiverse http://www.thingiverse.com/thing:740357
and it looks like there are a handful of existing modifications (http://www.thingiverse.com/thing:740357/#remixes
) . I really like the Idea of adding LED lighting powered off the scanner as well, so that might be something I include as well.
I'm tackling the turntabel base today. I've got the 20mm extrusion pockets done, but then i got to looking how they were printing that thing, and it would be really difficult to print them as is. They also are using a bunch of support. Since there isn't a whole lot of torque there, and since I kind of want to put a different bearing arrangement there anyways, I also decided to slice the turntable base in half and mount the upper bearing and motor plate to the lower section using m5 heat set inserts. That will allow both halves of the resulting assembly to be printed without support, and will allow for easier modification / upgrades going forward. I also eliminated the third rod entirely. the motor cable will be ran via the top unused Tslot channel, and covered with tslot way cover plastic sourced from Mcmaster carr at $0.10 per foot. You can Kind of see where I am heading in this unfinished rendering.
For the scanner main body itself, printing that large of an assembly is going to take alot of time, and be prone to a higher failure rate than something composed of smaller assemblies. I still want to try and make it folding, but either way I want to make the overall unit easier to print in several assemblies. to that end, the base will become a separate hinged unit with anchor points for the power, on / off switch and 2 USB ports. The mid section will become a standalone enclosure, probably with a flat back panel for ease of printing. I like the curved one, but that has to be a pain in the ass to print.
The upper section will now bolt on to the mid tower, probably with M5 heat set inserts. This will allow replacing the upper segment to accomodate camera / laser upgrades in the future without needing to reprint the entire body. The arms will become 2omm extrusions on the same sort of hinge as the lower frame. I plan on using lever cam nuts to lock the arms and base in place, along with integral physical travel endstops, maybe a magnet or two. On the arms, the main unknown for me is laser adjustability. Would it be better to allow the lasers to be easily moved along the arm to adjust the aim point, or would it make for an easier user experiance to lock them in place at the fixed end of the arm like they are now? For the laser mount itself I plan on using a clamp style mount rather than the existing single point screw. Building in threaded adjustment points is possible, I just don't know if they are needed.
The folding anti tip legs will bolt onto the lower frame T-slot. With the amount of mass being removed from the lower assembly, they may become more necessary.
I'll probably make a separate build thread in here once I get parts further along to separate it from general observations. I need to figure out next which angle and intensity of lighting work best for best scan resolution.