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How can I create an angle cut out of a cylinder? (sort of like a needle)

zach_morriszach_morris Member Posts: 5
I’m brand new to Onshape. I’ve used 2D animation apps before, and have gone through a few tutorials to make pretty basic shapes. 

I’m curious how I would make the device below. It’s a hallowed out cylinder that needs an angled slice (sort of like a needle), and has an arm protruding out of it at an angle.

I started by my making a 2d version of the “Top View” and bottom view and extruded it out, but I couldn’t figure out how to modify that in any way to resemble the shape of the side view. I included a snapshot of my failed attempt below.

thanks! 

Best Answer

Answers

  • KrzKrz Member, Developers Posts: 60 ✭✭✭
    - extrude the biggest profile up to Plane 1 (instead of Distance) and select New instead of Add in the Extrude panel
    - make new Plane with Offset 10 from Plane 1
    - split that new part with Plane 2
    - remove bottom element after split (you have 2 elements now: 1 between planes and one under plane 2)
    - make new Extrude of biggest circle up to Plane 2 (use Add and select Part 1 as context)
    - join Part1 and Part2
  • zach_morriszach_morris Member Posts: 5
    @Krz I’ll have to look at an onshape dictionary to understand your answer. haha but in theory I think I understand what you’re saying. between your answer and @steve_shubin ’s answer I think I’ll be able to step through the history and learn out to make the shape myself.

    @steve_shubin I just realized you finished my part for me. You sir, are a true friend of Narnia. I’m going to follow the history and see if I can learn how to do what you did.
  • zach_morriszach_morris Member Posts: 5
    @steve_shubin I think I figured out how you made the main shape.  I was able to duplicate it using the settings below. This was exactly what I was looking for so thanks again for taking the time to help out!

  • steve_shubinsteve_shubin Member Posts: 360 ✭✭✭
    @zach_morris

    Glad to hear it helped.

    Originally I tried 10 mm on the offset, but it looked too thick compared to what you sketched in your notes. So that’s why I made the offset 7 mm. But yeah you got it figured out 

    To get the so-called chamfer, I tried using the chamfer tool, draft angle, sweep. But nothing gave the results I believe you were looking for. So I used loft. It took 9 steps in the features list to accomplish this so called ‘loft’. If somebody knows a more economical way to do it, let me know. It hasn’t come to my mind yet


  • steve_shubinsteve_shubin Member Posts: 360 ✭✭✭
    @zach_morris

    TYPO CORRECTION 

    It took 9 steps in the features list to accomplish this so called ‘CHAMFER’


  • zach_morriszach_morris Member Posts: 5
    Yeah that was a pretty rough sketch. Don’t get me wrong, your version looks sexier, I just don’t know the structural integrity of PLA. haha I plan on getting my ender 3 capable of printing more durable filaments, but we’ll see how PLA holds up. I won’t get my printer until late september so it’ll be awhile before I’m printing anything.
  • michael3424michael3424 Member Posts: 527 ✭✭✭
    I won’t get my printer until late september so it’ll be awhile before I’m printing anything.
    Must be a Prusa FDM printer that you ordered in April/May <g>.  If my experience is typical, plan on buying a spare heater cartridge and thermistor now.  A spare build plate or two wouldn't be a bad idea either.  The plates seem to last just fine, but availability is spotty.  FWIW, Prusa PC blend filament seems to be pretty sturdy but you need to use a glue stick with it to avoid permanently sticking the filament to the plate.  I bought a spare plate to use just with the PC blend as it is a minor PITA to clean.
  • zach_morriszach_morris Member Posts: 5
    I actually got the ender 3 v2. Got a few upgrades, including all metal dual drive extruder, new bowden tubing, and better bed leveling springs, and some hardened nozzles. I’ll probably get the direct drive if I end up printing printing a lot with nylon, abs, wood, etc. Figure I’ll just mess around with PLA while I learn the printer though. 
    I won’t get my printer until late september so it’ll be awhile before I’m printing anything.
    Must be a Prusa FDM printer that you ordered in April/May <g>.  If my experience is typical, plan on buying a spare heater cartridge and thermistor now.  A spare build plate or two wouldn't be a bad idea either.  The plates seem to last just fine, but availability is spotty.  FWIW, Prusa PC blend filament seems to be pretty sturdy but you need to use a glue stick with it to avoid permanently sticking the filament to the plate.  I bought a spare plate to use just with the PC blend as it is a minor PITA to clean.

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