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What does "sketch curves to extrude" mean??

marc_cawoodmarc_cawood Member Posts: 6
edited September 2017 in Community Support
So I'm battling to split a part which I want to print in two colors.

I guess I need a surface (in my case a cylinder) to separate my solid cylinder into two parts but I am unable to generate any kind of surface extrusion.

If I try to extrude a circle into a cylinder I select my line sketch and then extrude -> Surface onshape just shows "sketch curves to extrude" (in blue and green - which sounds better than red) but does not extrude at all and I am unable to proceed. If I click OK nothing happens.


Same thin if I try to extrude a simple line into a plane (see pic). 


Best Answer

Answers

  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 5,310
    Hi Marc, you need to physically select the line or circle on screen when extruding a surface. 
    Senior Director, Technical Services, EMEAI
  • marc_cawoodmarc_cawood Member Posts: 6
    Hi Neil,
    I would if I could. No matter what I do I cannot seem to select it. The only time my circle sketch is even visible is when I edit it.
    Perhaps because it's coincident with the part? I don't know but I can't click it at all
    https://cad.onshape.com/documents/8dbea644c0474fabd876836b/w/4a15ff5feb6376378b767140/e/011481b323d11188c9367154
    Is there any altternative to clicking on the drawing? Like a list? Or any way to hide parts?
  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 5,310
    The sketch will be hidden by default. Click the eye next to the sketch in the feature list. 
    Senior Director, Technical Services, EMEAI
  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 5,310
    You can also hide parts by clicking the eye next to the part in the parts list or hover over it in the graphics area and press Y on the keyboard (works for all entities)
    Senior Director, Technical Services, EMEAI
  • marc_cawoodmarc_cawood Member Posts: 6
    Yeah... we're making progress. It's still not generating the extrusion and it's saying: "select sketch curves to extrude".


    I imagine it wants to know in which direction to extrude but read somewhere this is always/usually normal to the sketch plane...
  • marc_cawoodmarc_cawood Member Posts: 6
    I can't. I hover over my cyclinder sketch and no lines are highlighted to select. I can only select the sketch.

  • marc_cawoodmarc_cawood Member Posts: 6
    So I re-did my circle sketch - this time choosing the top plane instead of a face of my part as my drawing plane.
    I was then able to select the circle and extrude it.
    Weird.
  • BlåhajBlåhaj Member Posts: 4 EDU
    You don't need to create a new surface. you already have one. Also in your video you extrude a surface that passes through the surface highlighted in the image. Yes i know this was like 6 or 7 years ago, but something that may help you in the future 


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