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Separating and customizing mirrored parts

jim_brooksjim_brooks Member Posts: 4
I am trying to make a part to clamp a caliper jaw. It's composed of two halves, each with a pocket for the jaw. They are bolted together to clamp the jaw.
First issue, when mirroring, there is no space between the parts. I mirrored off the right side as the front face put them face to face which I didn't want.
Second issue, when mirrored, there is no space between the parts and I see no options to change this.
Third issue, I have some pins extruded out from one side and I would like to make them pockets on the other side to align the two sides.
How would I do this.

Best Answer

  • matthew_stacymatthew_stacy Member Posts: 489 PRO
    Answer ✓
    @jim_brooks, there are likely dozens of ways to skin that cat (sticking the question 1:  "how to space the mirrored parts away from one another"):
    1. Offset the sketch geometry from your original part and mirror the parent part about one of the default planes (e.g. front)
    2. Mirror about a mate connector (which you can edit to offset the face of the parent part) instead of a plane
    3. Create a plane, offset from face of parent part, to mirror about
    4. Apply the "transform" tool to move parent or child part after mirroring
    5. ...


Answers

  • matthew_stacymatthew_stacy Member Posts: 489 PRO
    Answer ✓
    @jim_brooks, there are likely dozens of ways to skin that cat (sticking the question 1:  "how to space the mirrored parts away from one another"):
    1. Offset the sketch geometry from your original part and mirror the parent part about one of the default planes (e.g. front)
    2. Mirror about a mate connector (which you can edit to offset the face of the parent part) instead of a plane
    3. Create a plane, offset from face of parent part, to mirror about
    4. Apply the "transform" tool to move parent or child part after mirroring
    5. ...


  • jim_brooksjim_brooks Member Posts: 4
    Thanks Matthew. That fixed it now a few more tweaks and I'll have my part. Thanks so much for your help. So much to learn so little time.
    It would be nice if rather than needing to use another tool, this tool mirror provided this facility directly.
    Have a great week.
    Jim
  • matthew_stacymatthew_stacy Member Posts: 489 PRO
    @jim_brooks, holler if you're still wrestling with the 2nd part of your original question ... interlocking features on the paired parts.  Boolean-subtract is often a good approach for that sort of task.
  • eric_pestyeric_pesty Member Posts: 2,065 PRO
    Thanks Matthew. That fixed it now a few more tweaks and I'll have my part. Thanks so much for your help. So much to learn so little time.
    It would be nice if rather than needing to use another tool, this tool mirror provided this facility directly.
    Have a great week.
    Jim
    It looks like @ma@matthew_stacy might have mixed up the name of the tabs in his example but the mirror using a mate connector option is just one step (show in the "transform" tab) :
    https://cad.onshape.com/documents/a19c79e7afb170ed80a422a5/w/48afbd212cd720a2eba7157b/e/e17f37ab9a542d04205dc308?renderMode=0&uiState=634043ee60b71f6a75d71de0

    In this specific case the part you are mirroring appears to be symmetric (i.e. not actually a different shape at this point) so you could also do a circular 180deg pattern (using a mate connector as the origin) or just a "transform by mate connector" (with copy body option checked), which would both achieve this in one step as well. 
  • jules_nijstjules_nijst Member Posts: 12

    I see my last comment is not included, so a new attempt here…

    I had the same trouble as Jim to create a mirror part separately, but they are 'joined' at the mirror-plane and no easy solution to separate them…

    Matthew provided the answer for me : In the sketch find the PLANE from which you need to mirror the part (top, front,right - need 'Default geometry' on top left showing) Then, while not in sketch, click on top-bar on PLANE. It automatically creates a new plane 25 mm apart from the plane with the part to be mirrored. THEN click Mirror; select Part you want to mirror and in Mirror-plane select: the new created plane. Click and Presto ! New mirrored part 25 mm apart…

  • eric_pestyeric_pesty Member Posts: 2,065 PRO

    You can also just add a transform feature to move them away from each other (might be simpler than creating a plane)

  • MDesignMDesign Member Posts: 575 ✭✭✭

    Alternatively…Then, while not in sketch, click on top-bar on PLANE. It automatically creates a new plane 25 mm apart from the plane with the part to be mirrored. THEN click Mirror; select Part you want to mirror and in Mirror-plane select: the new created plane click mate connector. select face of part to mirror about, click mate edit icon. add 12.5mm offset in z parameter. Click green check and Presto ! New mirrored part 25 mm apart…

    side benefit cleaner feature tree.

  • eric_pestyeric_pesty Member Posts: 2,065 PRO

    This was already suggested in the first reply to this thread, and definitely a good option… I had assumed that @jules_nijst had looked at the first answer in the thread already!

  • MDesignMDesign Member Posts: 575 ✭✭✭

    it was but wasn’t spelled out. Thought I’d add a bit of color to it since mate connectors are not an in your face type of option to do things. Creating a plane on the fly does not scream “do a mate connector!!” Although that is essentially what is happening. The language just doesn’t flow well when everything is learned with “planes”.

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