Can you solve this riddle?

March 31st, 2011

Square Triangle Circle Riddle Dimensions Problem solving geometry

Create a single part that can fit through three Circular, Square and Triangular holes. The Part must fit through each hole perfectly with no gap between it’s edges and the edge of the hole.

The Circle is 1″ in diameter
The Square is 1″ on each side
The Triangle has base of 1″ and a height of 1″

The solution is in the zip file.

Good Luck
Bobby

Click below to see the answer

Read the rest of this entry »

Uploaded two models to GrabCAD (AA Battery and Geneva Device)

March 1st, 2011

If you are looking for a great Solid Works resource then I have the place for you;  GrabCAD is a community where you can share solid models in many formats.  I recently uploaded two new models.

A geneva device

Geneva Device rendered in KeyShot from a SolidWorks Model

AA Battery

AA Battries rendered in KeyShot from a SolidWorks model

SolidWorks Human Eye Model

February 23rd, 2011

human eye rendering in keyshot from a solidworks 2010 modelCross section of the human eye rendered image

The model is of the human eye and contains detailed parts for anatomy or medical purposes.

Download the SolidWorks 2010 model here

Three configurations of the model are exploded view, full eye and cross section showing:

  • Sclera
  • Ciliary Body
  • Suspensory Ligmanet
  • Cornea
  • Iris
  • Pupil
  • Lens
  • Vitreous Humor
  • Choroid
  • Retina
  • Fovia Axis
  • Optic nerve
  • Optic disc
  • Retina artery and vein

SolidWorks CSWA Exam!

February 1st, 2011

Are you considering taking the Certified SolidWorks Associates Exam? Given I was teaching SolidWorks at the Benjamin Franklin Institute, I thought that I should at least pass the exam I expected my students to take. So last year I took (and passed) the exam. Here are some links to example exams, tips on what to study, and video tutorials for the exam.

Sample Exam here:

link to what to study here:

Video Tutorials here:

Good Luck

This year I plan to take the CSWP Certificated SolidWorks Professional exam. Stay tuned for more details!

Windows 7 Blue Screens on New Hard Drive

January 28th, 2011

Is your system crashing after having just installed a new hard drive in your Windows 7 computer?  Crashes typically occur when resuming from sleep mode and I recently had this issue after I moved my system over from a small hard drive to a much larger Western Digital 2Tb drive (See here).  After much searching, I figured out what the problem was and that (luckily for me) Windows 7 provided an easy fix. The problem has to do with really large hard drives 1Tb and above. See below for a solution to this problem.

The problem: When waking from sleep mode, a blue screen appears.

Why this occurs: When Windows is in sleep mode, the drive shuts down.  When your system comes out of sleep mode, the drive turns back on and spins up.  The larger drives take longer to come on and Windows times out before the drive is finished–resutling in a blue screen.

The solution: Windows provides a hotfix for this that can be downloaded and installed. See Microsoft support here for the hotfix.

Since installing the hotfix, my computer has worked perfectly!

I hope this helps others.

As always back to mechanical engineering and product design!

Should the density of snow be included in snow depth measurements?

January 25th, 2011

Snow Measurement Device

With the large number of snow storms this winter, I have been thinking about all the snow I have been shoveling.  It seems to me that density should be included in the snow depth measurement.  I believe that meteorologists should report not only the measurement of snow as it has fallen to the earth but also should report the compaction of snow, for instance 12″ of snow will compact to 6″ inches of snow. This would give us a sense of how hard it will be to get rid of all the snow once the storm passes.

There is a method for measuring snow depth that involves returning the snow back to a liquid state then measuring the amount of liquid. This seems to be a bit much to me.  I propose a  system with a simple rod with a bearing plate on it. The user would measure the depth of snow with the plate at the surface then the user would then press the disk into the snow and take a measurement after reaching full compaction.

Read the rest of this entry »

InMap by LinkedIn

January 25th, 2011

LinkedIn InMap for Bobby Dyer a boston based mechanical engineer

I just created an InMap using linked in Labs new tool.  Pretty interesting how it grouped my friends and colleagues so well.  I was really impressed.  Try it yourself here

Uses for SolidWorks Combine Subtract and Common Bodies

January 24th, 2011

SolidWorks Bodies Combine Subtract and Common

Using bodies in SolidWorks is a good way to simplify your modeling by reducing the number of features needed to make a part.  Using Boolean features;  combine subtract and common are excellent methods to create complex parts or work in team on a single part.   One of the most common uses for body features is to connect two separate bodies.  This is typically done when the deign of features of your part are defined but the connection between is still unknown of variable.

Below is an animation of the three principal body cut features.  Combine (add) Subtract and Common.  Using a sphere I have shown the results of each of the features.

Continue reading to learn about the uses of the bodies especially working on a single part with a team!

Read the rest of this entry »

How to move Windows 7 to a new internal hard drive

January 23rd, 2011

Moving Microsoft Windows from one hard drive to another can be very stressful. For example you may be afraid that you will make a mistake and lose all your data. I used to be in your shoes but I have figured out a simple to do this.

Below is a description of how to create a system image of your current Microsoft Windows 7 setup, move it to a new hard drive, and successfully restart Microsoft Windows again.  I was really impressed with how easily this worked out so I wanted to put the details up for others to use.

For this process you will need:

  • A functional Windows 7 OS
  • A Windows 7 install disk
  • An external hard drive (large enough to hold your data while you transfer to a new internal hard drive)
  • A working knowledge of the installation process of a new hard drive
  • A new internal hard drive equal to or larger than your current internal hard drive

Read the rest of this entry »