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Another silly question, how can I line up features with other that sit at a 90Deg angle. For exampl

For example, I want to put additional slots around the side of this device.  However, to make it look neat I would like them to line up with the slots on the top face.  How would you guys go about getting a visible reference point to draw from?  When I turn it to the side profile, I can't see anything any longer.

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    David_YL_NguyenDavid_YL_Nguyen Member, Onshape Employees Posts: 100
    Hey @luke_glazebrook456,
    Would you be able to share a link to your model? That should make it quick and easy to help you out. Cheers
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    glen_dewsburyglen_dewsbury Member Posts: 610 ✭✭✭
    While you are making a new sketch for the side opening, rotate the view so you can see the top. Using the USE tool you can select a mid point from the top opening. That point will be the center of the new sketch and maintain position relative to top slots.
    https://cad.onshape.com/documents/8176bf42ef782f8303d3ee92/w/9a054da62eb5b27426d906a3/e/692db6423773db54bca16eec
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    nick_papageorge073nick_papageorge073 Member, csevp Posts: 690 PRO
    edited September 2023
    It's good practice to make your part symmetrical about the default planes. So for example if the outline sketch was drawn on TOP, then you can use RIGHT plane as the alignment plane. When you draw the sketch for the hole in the face, the rectangle in the face, and the new openings on the side, the first sketch of each can be coincident with RIGHT. Then you pattern each. The planes go all the way through the part so they are always available from any side of the part (assuming they are normal to the sketch plane, of course).
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    nick_papageorge073nick_papageorge073 Member, csevp Posts: 690 PRO
    edited September 2023
    PS, be very careful if this is a 3D printed filter for the bottom of a swimming pool. There have been many deaths with children getting stuck on them over the years when the plastic grate breaks. The suction becomes too strong and even adults can't separate the child from the drain opening.
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