SOLVESPACE -- parametric 2d/3d CAD

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adding a straight milled slot on a cone. (by John Griessen)
I'm wanting to add slabs that fit in a slightly tapered cone and the first is on the same plane as original workplane. How to use constraints to the cone surface?
Fri Jun 5 2015, 18:09:03
adding a straight milled slot on a cone -- constaints? (by John Griessen)
Here's some background to this project: I'm making rainproof modular enclosures for radio-computer electronics used for wireless sensor networking or point to point radio links or ?? has a few of the drawings including the rough cut first stab called shell-1.slvs shell-1b.slvs full of bad technique. the latest is

The cylindric part will be 3D printed and/or molded from a mold made by3d printing and some manual lathe work. The slots are for holding a circuit board or three. I'll make slots in a cone shape that engages with a 3D printed mold made of ABS. The aluminum cone shape will be slotted to make little shelves on the inside of the cylindric/conic part. Any hints on orienting workplanes, or favorite approaches will be appreciated.

I don't have lots of 3D drafting experience with commercial tools, just EE experience and manual machinist experience.
Fri Jun 5 2015, 21:21:38
(no subject) (by Jonathan Westhues)
Do you have a .slvs file that includes the slots, even if they're just dragged with the mouse (and not constrained)? I don't immediately understand where they're supposed to be.

There's no way to constrain with respect to a conical surface. You may be able to use some combination of constraints on the entities that generated that surface, though.
Sun Jun 7 2015, 00:56:02
adding an extrusion from an imported external file. (by John Griessen)
I've started making an extrusion as a separate file. If constraining to a conical surface is out, I could constrain to a flat sketch that is used to lathe the cone,
and use some trial and error. I just put enclosure-pcb-slots-1.slvs in I have not figured out how to place such yet, but am working on it again now for the next while. Will post another note here when I figure that out.
Sun Jun 7 2015, 11:11:44
.slvs file that includes the slots (but aimed wrong) (by John Griessen)
I just put enclosure-mid-mod-inj-slots-10.slvs in that shows the shelves/slot in which a pc board will fit. Next I need to learn to use imports and align them wrt to other workplanes.


John Griessen
Sun Jun 7 2015, 11:22:19
my approach for adding 3D elements (by John Griessen)
I'm reading and experimenting to figure how to add 3D from imports. Since imports can be edited and affect downstream assemblies or constructions of them, I am going to try just using sketches that are the basis for an extrude first. The sketch can change any part without affecting the length of the extrude done in the downstream construction. such a sketch can be used several places easily.

For aligning, I will hunt for how to align a workplane relative to a sketch, and aliign two different workplanes at 88.5 degrees. (or what the construction needs) by setting the 88.5 degrees two places instead of having it be a constraint.

If possible to constrain the angle of a workplane wrt lines in a sketch-in-plane, that would help. That's what I'm digging for now. Thanks, John Griessen
Sun Jun 7 2015, 11:33:35
orienting a new workplane from a point and two lines (by John Griessen)
A point and two lines are the start of new workplane not at 90 degree angles. I'm attempting to get a line accurately placed in 3D, normal to the default workplane and am not getting it.

I'll go work on importing and orienting to see if anything is different -- maybe constraining an import edge against a flat sketch point or two while also constraining some midpoints of the import to be in the sketch plane...
Sun Jun 7 2015, 13:17:02
orienting a new workplane from a point and two lines (by John Griessen)
I just figured how to get a new construction line to be normal to my original sketch plane. Horiz and Vert. needed a workplane first. Parallel works against the origin vectors/normals/arrows/watch-a-callit as is, so now I have a right angle out of the workplane construction line to build against.
Sun Jun 7 2015, 13:22:06
orienting a new workplane from a point and two lines (by John Griessen)
Now I have a slightly tilted workplane installed relative to the default sketch-in-plane and can move it by changing a dimension in my first flat sketch. Cooking along now. John
Sun Jun 7 2015, 13:45:45
tilted workplane relative to first sketch-in-plane (by John Griessen)
enclosure-mid-mod-inj-slots-11.slvs at
Sun Jun 7 2015, 13:49:00
(no subject) (by Jonathan Westhues)
Looks reasonable to me. You may also want to use 3d geometry (Sketch -> Anywhere In 3d or New Group -> Sketch in 3d) to set up datums for your workplane, simpler sometimes than defining a new intermediate workplane just for the construction lines.
Sun Jun 7 2015, 14:03:12
tilted workplane relative to first sketch-in-plane (by John Griessen)
With Sketch -> Anywhere In 3d, I got error messages that I needed some kind of workplane. Are you saying, I could choose any of the existing ones for construction lines or datum points to be relative to? Thanks, JG
Sun Jun 7 2015, 16:49:13
(no subject) (by Jonathan Westhues)
What constraints are you using? Some always need an active workplane, like horizontal or vertical. Others work in 3d too, like parallel or distance.

Independently of that, a single group can contain entities and constraints in any combination of workplanes. By default, a "Sketch In New Workplane" creates that new workplane and selects it as the active workplane. You can switch workplanes within that group at any time, though, with "Sketch -> In Workplane".

You can mix and match constraints and workplanes. For example, you could constrain distance projected into workplane A between a point in workplane B and a point in workplane C. With many constraints, dotted lines are drawn to show the projection.
Sun Jun 7 2015, 17:11:54, download attachment dotted.png
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