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How to model milled step (by Mark Chambers)
I'm trying to model an existing heatsink for inclusion in an assembly model. The heatsink has milled steps in both ends. (see the attached jpeg) When I draw the horizontal line and two extensions to form the outline of the step and differential extrude it, SolveSpace extrudes the whole end of the existing extrusion profile. Is there some other way to do this? Thanks
Sat Aug 24 2019, 08:10:11, download attachment heatsink.jpg
(no subject) (by Matthew H)
Can you post your file? It should be possible to draw this as one extrusion with the profile, and then another to cut away the step.
Sat Aug 24 2019, 11:14:37
(no subject) (by Andrew)
Looking at that image, you will need at least two extrusions to shape the heatsink, assuming that you have the basic heatsink created. Using the plane of the fin tops, draw an outline to trim the outer shape of the heatsink, and then a the shape of the relieved section. Note that the shapes can go beyond the edges of the body to be trimmed.
Sat Aug 24 2019, 12:24:43
(no subject) (by Mark Chambers)
Please see the attached file.
When I added a workplane to the face you see when opening the file and tried tracing the outline of the lower perimeter on to it, I got a resolve error after just a few line segments.
Tue Aug 27 2019, 06:19:54, download attachment heatsink 1.slvs
(no subject) (by Mark Chambers)
I'm not sure I understand what you mean.
If I draw a rectangle to cover the area of the step and extrude it as a differential, won't there be material left outside of the perimeter of the heatsink shape? Or does a differential extrusion plus nothing equal nothing? Thanks
Tue Aug 27 2019, 06:34:48
(no subject) (by Andrew)
The attached sketch shows how I would tackle drawing that heatsink. It is simplified from what you want, but you should get the idea.
Tue Aug 27 2019, 10:43:24, download attachment heatsink.slvs
(no subject) (by Mark Chambers)
I got the idea, finally. See the attached model. Thanks again for your help.
Is there a way to hide the wireframes leftover from the differential extrusions?
Thu Aug 29 2019, 12:07:24, download attachment heatsink 2.slvs
(no subject) (by Andrew)
I have found that you can hide those wire frames by turning of the sketches from which the extrusions were generated.
Thu Aug 29 2019, 12:51:06
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