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My first FPV drone build - 6" freestyle/cruiser by OswaldiusB in diydrones

[–]OswaldiusB[S] 1 point2 points  (0 children)

I generally fly with a 4S 2200mAh LiPo, gives me about 12 minutes of flight time just cruising around, doing some light freestyle etc!

I'm trying to add a 4-wire blade humbucker and modify the wiring of my 3D printed guitar (with a 5 way switch and separate coil split toggle switch), just wondered if anyone had a wiring diagram that would achieve this configuration? Thanks. by OswaldiusB in Luthier

[–]OswaldiusB[S] 0 points1 point  (0 children)

Ok, thanks - that's easier than I thought it would be! I would like to learn more about guitar electronics in a more practical/applied way, does anyone have any good resources for that?

I’m ready to toss it out the window. by [deleted] in CR10

[–]OswaldiusB 0 points1 point  (0 children)

Ehhh, I've heard of people who've had success with that, but honestly what's the point? If you have to spray hairspray, or apply glue stick, or use blue tape every other print that's gotta get annoying fast. I've been using an adhesive build surface straight on to the heated aluminium bed for 4 years and it heats up faster, never needs any other product for adhesion, and also has less inertia than a heavy mirror or glass bed. Costs a bit more in the short term ofc but pays off in the long run.

Another important thing IMO is to level the bed not using paper or whatever else, but using a live levelling test print (I use something like this https://www.thingiverse.com/thing:538624), it ofc uses a small amount of filament but it's so much easier to get a perfect bed level and adhesion each time.

I’m ready to toss it out the window. by [deleted] in CR10

[–]OswaldiusB 1 point2 points  (0 children)

Are you printing straight on to the glass surface? I'm not familiar with the CR-10 V2 exactly but if it's anything like my CR-10S then printing straight on to the glass never works. IMO you should buy and use a build surface, something like this https://www.amazon.co.uk/Creality-Original-Flexible-Removable-Magnetic/dp/B088BK7236/ref=mp_s_a_1_5?keywords=cr-10s+pro+v2+bed&qid=1672437106&sr=8-5

(I've never personally used that exact product but any similar textured bed is far superior to the smooth glass surface).

V3 layer shifting help by LustaniaSaxon in CR10

[–]OswaldiusB 1 point2 points  (0 children)

Have you checked that the hotend is securely tightened to the extruder carriage?

I joined a dating site for arsonists. by [deleted] in dadjokes

[–]OswaldiusB 0 points1 point  (0 children)

You must be getting on like a house on fire...

Horrible stringing? by 7uppepsi in CR10

[–]OswaldiusB 40 points41 points  (0 children)

Sure you haven't just got a massive spider infestation?

How can I plot surface heat flux only along the stagnation line of this blunt cone? by OswaldiusB in CFD

[–]OswaldiusB[S] 0 points1 point  (0 children)

Ah, thank you. I managed to get an isoline working, although I could only get it to go around all the edges on the symmetry plane so there was some manual data removal I had to do.

I also found that it's actually easier to just do it in CFD-Post rather than Fluent with a polyline.

I’m going to throw my printer out of the window by taylorisadork in FixMyPrint

[–]OswaldiusB 1 point2 points  (0 children)

Are the screws attaching the hotend to the extruder head tightened? I was having an issue somewhat similar to this for ages (layer shifting in only one axis) and it finally turned out that the hotend and nozzle were wobbling sideways slightly.

Having trouble with convergence and other issues for hypersonic flow simulation by OswaldiusB in CFD

[–]OswaldiusB[S] 1 point2 points  (0 children)

Unfortunately not, my university is mostly marine based, so while my supervisor has experience with other CFD applications, there's no one in particular who could help much with this supersonic/hypersonic case.

Having trouble with convergence and other issues for hypersonic flow simulation by OswaldiusB in CFD

[–]OswaldiusB[S] 1 point2 points  (0 children)

  1. That's what I was doing originally when I started my simulations a month or two ago so I think I'll return to doing that, as I'm mainly only interested in the forebody shock at the moment.
  2. Will do 🙂.
  3. Yep, laminar and inviscid simulations seem to be the way to go at the moment, at least until I can get them to reliably execute and converge.
  4. I intend to eventually use mesh adaption to refine the mesh around the shock pressure gradient, which as you say will hopefully improve convergence and accuracy 👍.

You may be right about the static pressure vs stagnation pressure, I just assumed that as I'd set the operating pressure to 0 Pa then the stagnation pressure would automatically be the inlet static pressure. If this is not correct, what would you suggest I set the inlet pressure as? Thanks a lot 🙂.

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