• Do not go gentle into that good night

    lion mclionhead07/15/2022 at 04:32 0 comments

    It does melt.  There could be an inner liner of some kind.

    When it burns all the way down, as many sticks do.  It really needs metal parts.

  • Venting

    lion mclionhead07/09/2022 at 06:44 0 comments

    Backlit when the incense is half burned is where the venting happens.

    Anyways, the windows & the pointiness got unbearable so a new 10 hour print began.  It's always going to be an approximation because the real thing constantly evolves & burning incense has certain needs.  Some ashes were going through the windows so those got raised.

    It would be easier if the ship was removable, but it would be heavier.  It would be nice to remove it from the launch mount without screws, but it would require more magnets.

  • Incense Mark II

    lion mclionhead07/06/2022 at 21:03 0 comments

    Tilting it slightly proved very effective at containing the ashes, except when it was facing into the wind.  Facing into the wind causes a few flyaways.  Tilting it 20-33 deg would totally eliminate the ashes.  The problem is attaching the 2 segments when it's tilted over 20 deg.  The top has to be removable to light it.  Magnets wouldn't do the job.  A hook mechanism would be wobbly.  A spring loaded mechanism would be complicated & detract from the visual appeal.

    The next item is adjusting the angle of the incense.  Part of the plan is integrating the top of the clamp into the rocket to avoid trapping ashes in it.  The bottom clamp is a V pocket that moves to adjust the angle of the incense.  It's stuck to the floor of the launch mount by a magnet.  The launch mount would bolt onto a metal platform.

    The updated clamping should allow more engines to be modeled, but the aft dome was manely sacrificed to the incense clamp.  It turned out the ashes stick to everything no matter how curved the aft dome is.

    The upgraded thrust structure with 24 of the 33 engines & clamp was a lot harder to build.  It could have been a lot easier by using a larger section of infilled PLA.  The aft dome could easily be flattened, allowing the engines to be printed as 1 block of infilled PLA with temporary farsteners to align it with the aft dome.  Instead, 3 PLA sections are glued together & it's all very fragile.  There's a lot of void space which can't be cleaned.  Normal animals don't even bother with temporary farsteners.  The thrust structure is hidden inside the launch mount so it's really more about complying with injection molding requirements than anything practical.

    The spring mechanism was optimized to a point.  It wants to break off when the spring is tensioned & probably has to be made bigger.  

    Note to future lion that flush magnets can't be installed by paw.  The only way to get them in is by pressing them in with a knife & sliding the knife off.  Lions have been struggling to hot glue flush magnets since 3D printing began.  The magnet place needs .5mm extra radius & 1mm extra depth for the hot glue to flow.  Trying to install them by paw just gets them stuck diagonally.

    Another struggle has been reducing the amount of material in the launch mount.  The giant donut needs a top plate for visual appeal, an inner plate to bolt the rocket on, a bottom plate to glue the stilts on, & an outer plate for visual appeal.  That makes infill the cheapest solution.  The injection molding technique would involve gluing the bottom plate on a hollow top 3 plates.

    The stilts could be hollow, but infill makes them a hair stronger.  They get a lot stronger by gluing to the donut.

    Double sided tape was the easiest way to stick the launch mount on a sheet of tin.

    Magnetic V pocket worked quite well to align the stick vertically.  It only takes a small motion & the piece is stable.  No XY table or screws are necessary.  You wouldn't want to move the entire launch mount around the V pocket since that would take more tin.

    The object of the tilt was of course trapping ashes.

    The final tilt ended up 10 deg.  Looks like it's venting in this one.

  • Ash

    lion mclionhead06/30/2022 at 18:54 0 comments

    Ash containment isn't as good as hoped.  The clamp is misaligned & pointing the incense left.  The launch mount could use less material by sliding onto scissor points.

  • Printout #1

    lion mclionhead06/28/2022 at 09:27 0 comments

    It should have a 5mm wider radius & be shorter.  

    Ash collection was as expected.   Some of it went all the way through the launch mount to the table.  The mane idea was to stop it from blowing sideways.  

    It should be noted Out of Darts uses exclusively direct drive extruders, dual Z drives, dual Y rails, induction bed leveling.  Those PRUSA I3's were beasts.

    The lion kingdom's direct drive solved the extrusion jams, but now the X axis has a sag.  The next upgrade now should be an Ender 5 plus.

  • Model & printer death

    lion mclionhead06/27/2022 at 01:35 1 comment

    A very low fidelity model came together over 12 hours.  The general idea is the thrust structure is a bowl which collects the ashes.  It has to be turned over to empty the ashes.  Magnets attach the upper stages to the thrust structure.  The upper stages are taken off to light the incense & put on after the flames go out.  Then, they theoretically capture the ashes while allowing smoke to rise.  The thing which collects the ashes has to be separate from the thing which is put on after lighting.

    On the 1st try, the bed leveler immediately failed.  It had been consistently measuring the front left corner .2 mm low for several weeks.  Then, it inexplicably returned 200mm as the bed height & started printing in the air.  It was disabled & the lion kingdom went back to manual bed leveling.

    After another 2 hours of printing,

    The extruder suddenly failed partway through it.  After a day of troubleshooting, the best strategy was to manually press filament into the nozzle alone.  Then manually press filament into the bowden tube.  Then manually press filament into the extruder.  Each step was incrementally harder to press filament into, but who knows how hard it was originally.  The best results happened after replacing the bowden tube.  It extruded a few layers before stalling again.  The starship incense project was dead.

    There was a lot of grease on the outside of the bowden tube from an unknown source.  Grease could have also gotten inside the bowden tube.  There, it could have added enough friction to stop filament from sliding along.  PTFE is specifically used because it's slippery.  The EZR struder has also worn down from abrasion.

    Dehydrating PLA+ in the solar filament drier could have leached out oil.  It could have made it harder to push through the bowden tube.  It's believed a direct extruder has the best chance of solving the problem.

  • Clamp 1

    lion mclionhead06/25/2022 at 19:20 0 comments

    The journey began with the spring loaded clamp.  This was always seen as the hardest part.  The starship enclosure was seen as the easy part.