Improved airflow for the Mosquito hotend #41
Conversation
Redesigned the mounting bracket to duct into the cooling chamber rather than blow into the heatsink creating turbulence, and also went ahead and expanded the exhaust to help with airflow. I was getting really bad heat creep and redesigned the cooling portion of the mount.
Cooling ineffective - added a new version that helps mitigate this.
Improved airflow for the heatsink.
Awful cooling - improved design uploaded.
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Have since added mounts for the Takoto |
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Following up w/ some CFD data: |
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I'm so far behind, but I'm catching up. Personal life is hectic. This is really good work, thanks! Q: What does OSR and RW stand for? |
No problem at all, appreciate you! A: OSR= Open Source Racing. The goal is to develop motorsport components and tools and make them available for the enthusaist to reduce the entry cost into racing. More details can be found on the GitHub. I figure all the parts I contribute should be under the OSR name. RW= RENN WAFFEN, my small company that specializes in parts for racecars, and offering small scale prototyping, R&D, and reverse engineering to grassroots racers who may need a specific part for modification for their cars. More details can be found on the website. |
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I'm reviewing the files right now. MosquitoThis looks like a direct swap, no BOM changes besides the STL. LMK if that is incorrect. LancerLooks simple enough. What kind of screws mount the Lancer to the mount? BOM looks like:
TakotoI have two questions here: what's the difference between the normal Krakens and the Takoto version? Duct height? Q2: How does one print the intake? I don't see a clear print orientation. |
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Mosquito: correct, it's a direct drop in with no BOM changes. Lancer: The screws are M3x10, although M3x8 may also work. I should add that it's a good idea to add a dab of Loctite 222 or 243 to all of these parts. 243 specifically as it has higher thermal tolerance. The rest looks good. Takoto: The Takoto Kraken is the same height as the Kraken mount itself was positioned using the nozzle to match the nozzle height of the Mosquito. The difference between the ducts is that the two outermost horns had to be trimmed to fit the large heatsink profile which otherwise collided with the horns, so it came down to giving it space to breathe. As for the orientations, all of my parts are optimized for cooling vs. support-less printing so they all require supports. At most if your bridging settings are dialed in the Mosquito mount can be printed without supports, but the Takoto parts need them. Here are some screenshots: |
With your permission, I will link your personal website in the docs instead of your github account. You're contributing on behalf of a business, and I'd like to reflect that. |
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The Takoto mount will take more work to integrate, particularly with the shroud and duct. Would you rather I merge the Lancer and Mosquito first to get them done? |
That works! And yes, let's merge the Mosquito and Lancer first as they are more straight forward. Let me know what you would like me to do to make life easier for you with the Takoto. |
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I merged your PR changes into a new branch, osr. I can cherry pick from there. 🤘
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Thank you! Looks awesome!
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I'm going to leave it open until the Takoto is also worked out. I'll ping you on Discord when I get there. Thanks. |
Redesigned the mounting bracket to duct into the cooling chamber rather than blow into the heatsink creating turbulence, and also went ahead and expanded the exhaust to help with airflow. I was getting really bad heat creep and redesigned the cooling portion of the mount.