Hi so in my part, one side is suppose to be extruded 10mm, and another 7mm. However, I accidently extruded the whole thing 10mm and now i don't know how edit the second half to a 7mm extrusion
Thanks for your help
To do it as 1 extrude you'll have to draw the side profile and extrude the depth instead of the height
Got it TYVM
I can tell you that if you turned in something like Solid Works example - you could not get an A in my class. No second chances on this critical issue.
J. Mather Dec 15, 2017 3:05 PM (in response to Corey McVeigh)
John Frahm wrote:
John Frahm wrote:
J. Mather Dec 15, 2017 3:05 PM (in response to Corey McVeigh)I can tell you that if you turned in something like Solid Works example - you could not get an A in my class. No second chances on this critical issue.Why?
Not fully defined for starters..............
John Frahm wrote:Why?
This would not be an appropriate problem for the first hour of instruction.
Therefore, obviously, the student has had prior instruction of selecting an appropriate datum and fully constraining that datum to the Origin Center Point.
When I walk out onto the shop floor to make a part - the first thing I do is establish a datum on the machine, the 0,0,0 point.
Once that is established then any feature I make is predictable.
Most of the dimensions originate from the tapped holes - so the midpoint between those holes would make a good datum.
In the first hour of class I instruct to make use of obvious symmetry about the origin.
Sketch one line, rectangle, circle... (in this case a straight "slot") and dimension it immediately (relative to the Origin of course) for a sense of scale for the rest of the sketch.
In the first hour of class I instruct to fully constrain/dimension everything as you go rather than waiting till you have a complex sketch.
In the first 30 minutes of class I instruct to never ever turn in something to me with blue lines, points or arcs without a good explanation (and that at this beginner level there will never ever be a good enough explanation to satisfy me - so just don't do it if you want an A for the class).
Don't make up dimensions. There is no 42 dimension on the print. We cannot make perfect parts out on the shop floor. There is a tolerance associated with every dimension and an associated tolerance stack-up. If you machine to 42 (a dimension not on the print) and submit a part to inspection that has a print dimension out of tolerance because of stack-up, the "I made it to 42 argument does not fly."
There is no 42 dimension on the print.
There is no 24 dimension on the print. (for the feature indicated in sketch)
These are the things that a master machinist has to think about out on the shop floor - one would hope that the designer also thought of these considerations. And the only way they will have thought this way is if they have been taught to think this way. (unless they spend 4 yrs out on the shop floor first)
Of course prospective designers should have to spend a minimum 4 yrs on the shop floor before they are permitted to touch SolidWorks, but I get a lot of resistance on that.
Does that mean you advocate modeling a part based on how it will be machined and not on design intent (they are not the same in my opinion)?
No, not necessarily.
I usually model with an eye for Design Intent in the overall assembly.
So in that case we "cheat a bit" in the virtual world compared to the manufacturing process.
For example, I suggested using the midpoint between the two tapped holes as the datum.
But in the real world that is not a measurable location.
So it is a trade-off between teaching Design Intent and understanding how parts might change as the design matures and trying to also teach a bit about manufacturing processes. Design Intent trumps process, but both can be covered in discussion. That is part of why I am an advocate for classroom teaching over web-based only instruction.
Unless I missed something, you should know that the answer you marked correct is not close to what the part looks like (or how it should be modeled). I have to agree with J. Mather on this one.
A question for you. Is this part for a blue print reading class?
Hint 2: One sketch needed for the first 5 features (although if you are just learning SolidWorks probably need one sketch for each).
Just an FYI, you might want to hit up the built in tutorials in Solidworks. These will walk you through how to build up parts like this:
Do you know if students have access to Mysolidworks? If they do, there are a lot more resources available at:
Training | MySolidWorks
Thanks. I'll keep that in mind when students ask questions on here. There are some very good basic tutorials on that site... At least the ones I've seen. Is it okay to recommend students go there, or should I steer them somewhere else?
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