{"data":{"model":{"id":"156861","slug":"customizable-knob-for-cpap","name":"Customizable Knob for CPAP","authorship":"author","club":false,"excludeCommercialUsage":false,"price":null,"eduProject":null,"ratingAvg":"5.0000000000","myRating":null,"ratingCount":2,"description":"\n\n\n

This is a customizable knob to fit a D-shaft (shaft with flat) for a control that rotates and has push-on, push-off.

The housing it fits into has flats and ridges that interfere with pushing, and with the diameter of the print that holds the metal shaft.

I measured with digital calipers and wrote the openSCAD to model the broken knob, but better - stronger.

After an initial print that didn't fit, I added an option to the customizer to just print a test shaft so I could iterate on getting the dimensions right.

For the final print, I told the slicer to use concentric circles for the bottom layer - that's what you see in the finished print, in place on the CPAP.

In the slicer, I used a modifier to make the inner shaft use 4 vertical shells. That made it print solid, for extra strength.

Print Settings

Printer Brand:

Prusa

Printer: \n

i3 MK3

Rafts:

Supports: \n

Resolution:

0.3mm. Standard 0.4mm nozzle

Infill: \n

15%

Filament:\nAMazon Basic PLA \n Black

\n\nCategory: Parts\n","category":{"id":"82","path":[{"id":"48","name":"Hobby & Makers","nameEn":"Hobby & Makers","description":"Are you a maker? Everyone is, be a printer. Upgrade your home workshop and combine different materials and methods of crafting including 3D printing.","__typename":"CategoryType"},{"id":"82","name":"Other Ideas","nameEn":"Other Ideas","description":"Enjoy your time in the workshop and discover excellent ideas of quality craftsman 3D printed concepts for every project you embark on.","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2022-04-12T14:03:02.462160+00:00","firstPublish":"2022-03-30T14:26:46.147706+00:00","datePublished":"2022-03-30T14:26:46.147706+00:00","dateCreatedThingiverse":"2022-03-29T17:13:47+00:00","nsfw":false,"summary":"This is a customizable knob to fit a D-shaft (shaft with flat) for a control that rotates and has push-on, push-off.\u2026","likesCount":9,"makesCount":2,"liked":null,"printDuration":null,"numPieces":0,"weight":null,"nozzleDiameters":null,"usedMaterial":null,"layerHeights":null,"mmu":false,"materials":[],"dateFeatured":null,"downloadCount":20,"displayCount":157,"filesCount":2,"privateCollectionsCount":4,"publicCollectionsCount":1,"pdfFilePath":"media/prints/156861/pdfs/156861-customizable-knob-for-cpap-31aceed3-de22-44c8-9a8f-11595392c27f.pdf","commentCount":3,"userGcodeCount":0,"remixCount":0,"canBeRated":false,"printer":null,"image":{"id":"738529","filePath":"media/prints/156861/images/1466950_272dae36-5265-4875-be46-f01d47e12ec4/large_display_2022_03_27t11_18_08_cpap_156861.jpg","rotation":0,"imageHash":"VwgKDwD2xseNmJiKiZiHt4h3+32676cL","imageWidth":750,"imageHeight":807,"__typename":"PrintImageType"},"images":[{"id":"738529","filePath":"media/prints/156861/images/1466950_272dae36-5265-4875-be46-f01d47e12ec4/large_display_2022_03_27t11_18_08_cpap_156861.jpg","rotation":0,"imageHash":"VwgKDwD2xseNmJiKiZiHt4h3+32676cL","imageWidth":750,"imageHeight":807,"__typename":"PrintImageType"},{"id":"738530","filePath":"media/prints/156861/images/1466951_324e9869-5b5a-4d95-9a16-f043b5469a69/large_display_cpapknob_156861.png","rotation":0,"imageHash":"aOcJHYTnaHiPhniNdTiXh/d5fp/3","imageWidth":800,"imageHeight":600,"__typename":"PrintImageType"},{"id":"738531","filePath":"media/prints/156861/images/1466952_318cb020-c6c6-46a6-8e25-f0442d93a95b/large_display_cutaway_156861.png","rotation":0,"imageHash":"7vkNJILXmYV2iHh/dnhaitA/2Q==","imageWidth":592,"imageHeight":375,"__typename":"PrintImageType"},{"id":"738532","filePath":"media/prints/156861/images/1466953_369d961b-1aeb-4c83-8101-84b68ad9be64/large_display_testfit_156861.png","rotation":0,"imageHash":"7wkSJgL3aIh4h8dYd3d4iYaICIuEgFc=","imageWidth":342,"imageHeight":414,"__typename":"PrintImageType"},{"id":"738533","filePath":"media/prints/156861/images/1466954_f9a65785-ec2a-4bd2-8360-1fb3ad9de33b/large_display_2022_03_27t10_31_51_nob_top_156861.jpg","rotation":0,"imageHash":"nwgKDIKk9nWFd3hvh3ltlM9n+Q==","imageWidth":750,"imageHeight":481,"__typename":"PrintImageType"},{"id":"738534","filePath":"media/prints/156861/images/1466955_f13cb7d3-888b-4836-948f-62d02443e465/large_display_2022_03_27t10_31_44_knob_bottom_156.jpg","rotation":0,"imageHash":"XQgKDILE5maEeHh/hnp/lO5Y+Q==","imageWidth":750,"imageHeight":459,"__typename":"PrintImageType"}],"tags":[{"name":"knob","id":"43","__typename":"TagType"},{"name":"cpap","id":"2294","__typename":"TagType"},{"name":"openscad","id":"3633","__typename":"TagType"},{"name":"thingiverse","id":"6174","__typename":"TagType"}],"thingiverseLink":"https://www.thingiverse.com/thing:5334325","filesType":null,"previewFile":{"id":"643288","filePreviewPath":"media/prints/156861/stls/1466956_3c191137-aa32-4f33-833f-2390533c1204/cpapknob_preview.png","__typename":"STLType"},"license":{"id":"1","disallowRemixing":false,"__typename":"LicenseType"},"remixParents":[{"id":"112329","modelId":null,"modelName":null,"modelAuthor":null,"model":null,"url":"https://www.thingiverse.com/thing:5334325","urlAuthor":"DavidPhillipOster","urlImage":"https://cdn.thingiverse.com/assets/a2/47/39/e0/20/featured_preview_2022_03_27T11_18_08_CPAP.jpg","urlTitle":"Customizable Knob for CPAP","urlLicense":null,"urlLicenseText":null,"__typename":"PrintRemixType"}],"remixDescription":null,"__typename":"PrintType","user":{"id":"8816","handle":"WoodenDavid","verified":false,"dateVerified":null,"publicUsername":"WoodenDavid","avatarFilePath":"media/auth/avatars/c7/c7200da3-e249-49c2-86a6-239898fbe4c4.jpg","badgesProfileLevel":{"profileLevel":17,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isFollowedByMe":false,"isHiddenForMe":false,"canBeFollowed":true,"billingAccountType":"personal","lowestTierPrice":null,"highlightedModels":{"models":[{"id":"9906","name":"Easy Print Bone Folder","slug":"easy-print-bone-folder","ratingAvg":"4.6000000000","likesCount":102,"liked":null,"datePublished":"2019-11-09T21:11:44.308349+00:00","dateFeatured":null,"firstPublish":"2019-11-09T21:11:44.308349+00:00","downloadCount":771,"mmu":false,"category":{"id":"29","path":[{"id":"3","name":"Household","nameEn":"Household","__typename":"CategoryType"},{"id":"29","name":"Office","nameEn":"Office","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2022-04-12T14:29:05.012119+00:00","image":{"id":"42982","filePath":"media/prints/9906/images/80874_1d378a45-06a8-4bba-92b2-3c9c60ba5dab/glamour_9906.jpg","rotation":0,"imageHash":"HUoGDIJDm3s3y4WVT8r/cvotpg==","imageWidth":1334,"imageHeight":779,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"8816","handle":"WoodenDavid","verified":false,"dateVerified":null,"publicUsername":"WoodenDavid","avatarFilePath":"media/auth/avatars/c7/c7200da3-e249-49c2-86a6-239898fbe4c4.jpg","badgesProfileLevel":{"profileLevel":17,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"783117","name":"Coastline and Topographic Lithophane Earth Globes","slug":"coastline-and-topographic-lithophane-earth-globes","ratingAvg":"0E-10","likesCount":72,"liked":null,"datePublished":"2024-02-28T22:09:23.414354+00:00","dateFeatured":null,"firstPublish":"2024-02-26T21:24:06.367439+00:00","downloadCount":244,"mmu":false,"category":{"id":"98","path":[{"id":"90","name":"Learning","nameEn":"Learning","__typename":"CategoryType"},{"id":"98","name":"Haptic Models","nameEn":"Haptic Models","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2024-02-28T22:09:23.610704+00:00","image":{"id":"2836772","filePath":"media/prints/783117/images/6078419_42220a26-e123-4943-9b17-2844bfb670e8_4b234528-0a9f-4c4c-b42f-9e509e62efab/on-west.jpeg","rotation":0,"imageHash":"3UkOHYaaWod4h3ZwZ0qHi3RwbAa3","imageWidth":1280,"imageHeight":960,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"8816","handle":"WoodenDavid","verified":false,"dateVerified":null,"publicUsername":"WoodenDavid","avatarFilePath":"media/auth/avatars/c7/c7200da3-e249-49c2-86a6-239898fbe4c4.jpg","badgesProfileLevel":{"profileLevel":17,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"268329","name":"Customizable Headband","slug":"customizable-headband","ratingAvg":"3.0000000000","likesCount":28,"liked":null,"datePublished":"2022-08-29T20:27:15.128501+00:00","dateFeatured":null,"firstPublish":"2022-08-29T20:27:15.126112+00:00","downloadCount":128,"mmu":false,"category":{"id":"25","path":[{"id":"21","name":"Gadgets","nameEn":"Gadgets","__typename":"CategoryType"},{"id":"25","name":"Audio","nameEn":"Audio","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2022-08-29T20:27:15.149554+00:00","image":{"id":"1175976","filePath":"media/prints/268329/images/2387245_25c2f00c-9311-45b8-bbb4-9a4ae956944c/img_5227.jpg","rotation":0,"imageHash":"mBgKFYK6uHqAlYeLaGhnePVxag7H","imageWidth":800,"imageHeight":600,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"8816","handle":"WoodenDavid","verified":false,"dateVerified":null,"publicUsername":"WoodenDavid","avatarFilePath":"media/auth/avatars/c7/c7200da3-e249-49c2-86a6-239898fbe4c4.jpg","badgesProfileLevel":{"profileLevel":17,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"156880","name":"Cone for Yarn Winder, small skeins","slug":"cone-for-yarn-winder-small-skeins","ratingAvg":"5.0000000000","likesCount":27,"liked":null,"datePublished":"2022-03-30T14:28:32.553207+00:00","dateFeatured":null,"firstPublish":"2022-03-30T14:28:32.553207+00:00","downloadCount":108,"mmu":false,"category":{"id":"41","path":[{"id":"13","name":"Art & Design","nameEn":"Art & Design","__typename":"CategoryType"},{"id":"41","name":"Other Art & Designs","nameEn":"Other Art & Designs","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2022-04-12T14:03:01.973318+00:00","image":{"id":"738591","filePath":"media/prints/156880/images/1467059_633b75b3-365a-4138-bef2-07d424cd2375/large_display_windercone_156880.jpg","rotation":0,"imageHash":"2xgOFoBGXHiPZ4iEaamHeIeHjI/2u2k=","imageWidth":1024,"imageHeight":846,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"8816","handle":"WoodenDavid","verified":false,"dateVerified":null,"publicUsername":"WoodenDavid","avatarFilePath":"media/auth/avatars/c7/c7200da3-e249-49c2-86a6-239898fbe4c4.jpg","badgesProfileLevel":{"profileLevel":17,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"30800","name":"Soap Dish","slug":"soap-dish","ratingAvg":"5.0000000000","likesCount":23,"liked":null,"datePublished":"2020-04-29T15:19:32.171948+00:00","dateFeatured":null,"firstPublish":"2020-04-29T15:19:32.171948+00:00","downloadCount":208,"mmu":false,"category":{"id":"5","path":[{"id":"3","name":"Household","nameEn":"Household","__typename":"CategoryType"},{"id":"5","name":"Bathroom","nameEn":"Bathroom","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2020-04-29T15:19:32.195720+00:00","image":{"id":"145284","filePath":"media/prints/30800/images/305250_b5996a0a-1b37-4c62-80ac-a8a07bda7b5a/img_3898.jpg","rotation":0,"imageHash":"HnsOLwBIZ3dkh3iAeImJeIeImFQGb6AF","imageWidth":1500,"imageHeight":1500,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"8816","handle":"WoodenDavid","verified":false,"dateVerified":null,"publicUsername":"WoodenDavid","avatarFilePath":"media/auth/avatars/c7/c7200da3-e249-49c2-86a6-239898fbe4c4.jpg","badgesProfileLevel":{"profileLevel":17,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"9905","name":"Highly Customizable Tie Hanger 1.1","slug":"highly-customizable-tie-hanger-11","ratingAvg":"5.0000000000","likesCount":22,"liked":null,"datePublished":"2019-11-09T21:14:31.727103+00:00","dateFeatured":null,"firstPublish":"2019-11-09T21:14:31.727103+00:00","downloadCount":157,"mmu":false,"category":{"id":"42","path":[{"id":"17","name":"Fashion","nameEn":"Fashion","__typename":"CategoryType"},{"id":"42","name":"Other Fashion Accessories","nameEn":"Other Fashion Accessories","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2022-04-12T14:29:05.052657+00:00","image":{"id":"42979","filePath":"media/prints/9905/images/80866_33d055f8-6683-41d8-9aec-1622b588303f/img_3596_9905.jpg","rotation":0,"imageHash":"IDkOFgT6d6h5Z3iIdoZ4h3h434XcGPc=","imageWidth":1015,"imageHeight":1269,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"8816","handle":"WoodenDavid","verified":false,"dateVerified":null,"publicUsername":"WoodenDavid","avatarFilePath":"media/auth/avatars/c7/c7200da3-e249-49c2-86a6-239898fbe4c4.jpg","badgesProfileLevel":{"profileLevel":17,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"9907","name":"Tripod holder for iPad or iPhone with or without a case","slug":"tripod-holder-for-ipad-or-iphone-with-or-without-a","ratingAvg":"5.0000000000","likesCount":17,"liked":null,"datePublished":"2019-11-09T21:26:36.636238+00:00","dateFeatured":null,"firstPublish":"2019-11-09T21:26:36.636238+00:00","downloadCount":169,"mmu":false,"category":{"id":"26","path":[{"id":"21","name":"Gadgets","nameEn":"Gadgets","__typename":"CategoryType"},{"id":"26","name":"Photo & Video","nameEn":"Photo & Video","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2022-04-12T14:29:04.963389+00:00","image":{"id":"42984","filePath":"media/prints/9907/images/80880_938c005d-4c1a-4a83-88b3-e2e709441ead/img_3666_9907.jpg","rotation":0,"imageHash":"mwgOH4iIiHhvlXd4eEeZZoiI12/Z/aQO","imageWidth":2435,"imageHeight":2323,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"8816","handle":"WoodenDavid","verified":false,"dateVerified":null,"publicUsername":"WoodenDavid","avatarFilePath":"media/auth/avatars/c7/c7200da3-e249-49c2-86a6-239898fbe4c4.jpg","badgesProfileLevel":{"profileLevel":17,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"156864","name":"Test tube stand","slug":"test-tube-stand","ratingAvg":"5.0000000000","likesCount":17,"liked":null,"datePublished":"2024-03-18T20:35:06.169894+00:00","dateFeatured":null,"firstPublish":"2022-03-30T14:27:03.191457+00:00","downloadCount":87,"mmu":false,"category":{"id":"53","path":[{"id":"3","name":"Household","nameEn":"Household","__typename":"CategoryType"},{"id":"53","name":"Outdoor & Garden","nameEn":"Outdoor & Garden","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2024-03-18T20:35:06.648388+00:00","image":{"id":"738541","filePath":"media/prints/156864/images/1466969_649bf243-5e9f-466d-9ffd-b3e4139a20b2/2022_01_16t13_27_45_156864.jpg","rotation":0,"imageHash":"XwgKFAIHZnlZlWqGeEZ5j/nCCw==","imageWidth":600,"imageHeight":948,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"8816","handle":"WoodenDavid","verified":false,"dateVerified":null,"publicUsername":"WoodenDavid","avatarFilePath":"media/auth/avatars/c7/c7200da3-e249-49c2-86a6-239898fbe4c4.jpg","badgesProfileLevel":{"profileLevel":17,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"}],"featured":false,"__typename":"HighlightedModelsType"},"designer":false,"stripeAccountActive":null,"membership":null},"contests":[],"contestsResults":[],"prusameterPoints":null,"latestContestResult":null}}}