[11/7/2019] Updated to version 3. v3 has many of the same upgrade features present in Thanhos and Thanhlonv2.
This is a modular, disassemblable, tool-less, glue-less, screwless, half-dart mag based on the Katana platform. Utilizes a constant-tension coil spring, provided courtesy of Foamblast. They are also compatible with any traditional half dart magazine box spring (just make sure you glue in the base). You can also buy them via SquigglesSupply.
- 2x KaThanha Body
- 1x KaThanhaThanhlon Follower
- 1x KaThanha Sleeve
- 1x FoamBlast Drum Spring
None, but recommended for unupgraded cooling. Only do supports from build plate, and only for overhanging bevels
Between .21 to .3 layer height, .4 to .5 line width. >15% support density, ample cooling, at least two bottom layers (crisscrossing line orientation), at least two top/bottom layers (cross-crossing)
These mags feature a type of pseudo knurling/guide-rail pattern on the inside walls to help smoothen feeding. The biggest reason friction builds up from inserting too many darts is because they rub on the inside walls; changing the grain orientation on the surface that makes contact with the darts into being parallel with the movement of the darts makes a profound difference.
These tiny lines tricks your slicer into making the print grain parallel to dart travel. It's very important to play around with your slice settings and in/decrement them by .01 so that they render, and with only your very top layer should have the vertical lines. This feature helps control the top wall print orientation on a multitude of setups without complications of having to manually mess with wall orientation settings.
Locking tabs now feature friction fitting concave and convex grooves along the sides to help lock in the dove tails and protect against sheering motion.
Second mag catch slot:
There is a secondary lower mag slot that's in-line with Hasbro's mag release position. Intended for when you can just shorten your blaster and ditch the adapter. Meaker MK15 e.g.
You can stick the mags end-to-end and "jungle" them through the ExtensionSleeve.
Initial few layers on the central channel creates preview window, utilizing the translucency of fully fused bottom layers. Put at least two layers criss-crossing diagonally for the best rigidity and transparency. This doubles as rigidity to protect from the walls flexing inward and jamming the follower (which is a problem in actual Jet katanas).
- Vase Mode
Using the Spiralize Outer Controur option or "vase mode", you can slice the included sleeve files labeled vasemode (OPTIONAL) in order to get super clean low profile vases. Super fast to print, beautiful, and surprisingly durable.
If sleeve too tight:
Likely sagging, or the detents are rough, or bulged; this will wear over use. Or, the mag is too wide, and your Z is different than the file. You can insert one half of a body into a sleeve to check if it's a z tolerance or a xy tolerance
Expanded capacity jams:
When using the extension sleeves to increase capacity, manually inspect inside wall of the mag to make sure there are no burs (especially the interface edge where mag bodies contact each other), the path of the follower's nub should be smooth and uninterrupted. Sandpaper is your friend, do a quick wipe to make sure the inner walls isn't grainy.
Dovetails Too Loose
If the dovetails are too loose, you can use a lighter to warp the ends downward so they contact.
Bottom base sleeve too loose
Boil the base sleeve for 10 seconds; your print will contract by a few microns in the xy
Fitting spring in
Sometimes drum springs will be concave outward and the sharp edge will catch against the walls, resulting in difficulty fitting them into the spring rest. You can easily just crease the tab inward so it doesn't catch against the back wall
In case the spring rest sags too much during the bridging, such that you can't insert the tab of the spring through; just gently melt that bridge with a lighter and press it up with a toothpick.
- Too tight for adapter
Printed adapters will often vary with dimension because they're tighter and shrink more. To compensate, you can shrink one half by as much as <2% Z (or onelayer) and they'll still click together, and gravity drop better.
Squiggles for helping printing and adding features to fit it all together for which this mag would not be possible.
Foamblast for providing our hobby with constant tension springs
MTB Ryan, and the NMW community for suggesting some features and pointing out faults in the original Katana.
Alpha test subjects: Cuboid, Striller, Mephiston, RZT
Milan, of DevilsNerf for which this follower idea is derived from.
My contact is Thanhtacles on the nerf reddit discord, or r/Thanhtacles
-KathanhaBaseSleeve_v1.1.stl Chamfer added for smother more aesthetic transition over sharper corners.
-KathanhaInfinteExpansionBody_v1.1stl.stl adjusted to remove interfering dovetails
-Added KathanhaBody16mag_v1.stl 16 round mag so it's long enough for Heath MPH, slug pistol, KellyIndustries Openfire etc
-KathanhaFollower_v1.2.stl updated, made longer to help alleviate follower tilting at resting state.
-Collated all body files from 10 to 20 into a zip file for ease of selection. Should save people time for editing and extruding it yourself.
-Minor text fixes
-Updated Follower to be more filleted and champhered and wider in 1.4, fixed sleeve issue where they weren't contiguous with each other.
[2019/3/12]Version 2.0 Update
Many new improvements added with design features ported from Thanhlons. Notable:
-Dovetails now feature interlocking sheer motion protection, not solely based on friction
-Structural integrity improved with thicker wall in many areas.
-Guide rails/pseudo knurling added to follower and walls to force grain of print to be in line with motion of dart; reduces dart friction i.e. jamming.
-Double detents to improve hold of sleeve.
-Opened up license; now is Attribution & Share-alike
[2019/3/16] Important: This is currently in the middle of a 2.1 update, some files may be missing. Had to make some crucial changes. Extension sleeves and bodies are coming up this weekend
[2019/3/20] Updated everything to the same version for clarity (v2.2). Added Extension sleeve and bodies. No major changes, except for making the lips closer together
[2019/3/22] Uploaded Experimental 12degree angled 15mag
[2019/3/31] Version 2.3 update. Decided to make it even more printalbe on even more printers (esp for poorer cooling). Overhand angle is now 22.3deg. Channel should also be smoother with the nub having a narrower profile. Made the spring rest a little easier to insert, per recommendation of user @gargunkle. Added minor fillets so that the mag has more structural integrity and side bevels ooze less.
[2019/4/2] Uploaded some bonus extras; a low profile sleeve bumper, and a sleeve that lets you cheat an extra dart into each magazine increasing it's capacity by one, and one that has both features. Step file for extension bodies included
[2019/5/9] Uploaded STEP
[2019/6/12] VaseMode for bumper cap base sleeves uploaded (along with extension sleeves).
[2019/6/18] Uploaded a thinner walled model v2.4, to compensate for Worker's new gen3 38mm long darts. The length should be almost 39mm now. This should also help with any jams from oddball gen1/gen2 that were too long. Dovetails are also easier to snap together as a result.
[2019/6/26] Updated ExtensionBody (v2.4) to have smaller walls too, in order to compensate for longer darts. Updated corresponding STEP files folder.
[2019/11/7] v3 created. Pending rewrite log of changes
update Nov. 7 2019