Folks,
Any recommendations on a Creo Parametric 4.0 reference book? I'm not looking for a step-by-step study guide...I'm looking for something like "The Creo Parametric 4.0 Bible".
TIA
Bruce
ElectroMechanical Product Development
(Electronics Packaging)
UMD 1984
UCF 1993
Folks:
I have a need to calculate an event durations in XX.XX hours given a start time YY:YY gm and end time ZZ.ZZ gm.
For example, YY:YY gm could be 7:13 am and ZZ.ZZ gm could be 3:23 pm. Can anyone clue me in on how to do this in Excel?
TIA
Bruce
ElectroMechanical Product Development...
Guys:
For the IR heat absorbed from a terrestrial environment (but NOT including sunlight), how can I prove/show that the emittance and absorptance of a particular painted or unpainted metal surface are equal for that IR spectrum? I know it involves Kirchoff's Law but Kirchoff's Law is much...
thread384-436025
I found the closed-form solution thanks to Tom Irvine. Such a simple model does have practical value IMO in studying the vertical responses of shock-mounted equipment subjected to shock pulses like those in MIL-STD-810 simulating transit drop and other collisions. I worked on...
Folks,
I downloaded the free DraftSight 2D CAD program but the Dessault Systems web page offers no free block libraries or drawing formats.
Does anybody know where I can find some? If not for DraftSight, what about AutoCAD 2D? I'm thinking that, since DraftSight is an AutoCAD 2D clone, then it...
Guys,
If you do electronics packaging design for a living, is your boss and ME or an EE? If EE, do you feel he/she is adequate for the role seeing how he/she is not an ME? What attitudes do you see among managers and EEs in your workplace about the work you do?
ElectroMechanical Product...
Folks,
I have a complicated nonlinear equation in one unknown that has a bunch of constants and coefficients I want to change to see what happens to the solution. So I'd like to set up perhaps a hundred or more iterations, each of which requires a solution of the nonlinear equation. Any...
Folks, idealist that I am I have moved from one job to the next in my career trying to find an employer who not only cares about designing and delivering the products at hand but also cares to envision and implement an improvement program that will improve design engineering performance OVER THE...
Does anyone know where to find a database that tells us what manufacturers and part numbers exist having CTMs rather than the conventional single-resistance junction representations? Is there an industry CTM standard saying how they are determined and presented?
TIA
ElectroMechanical Product...
Suppose we had a flat, rectangular plate of, say, aluminum. And say we had three datums A, B, and C as primary, secondary and tertiary datums assigned to the largest flat surface (A), the longest edge (B) and the shortest edge (C).
Lets call out a 12-member pattern of simple holes at diameter...
Folks,
I have "The IDC Pocket Guide for Engineers" which seems to contain a lot of useful information. But looking it over I found an error in a temperature conversion formula [Tf=(5/9)(Tc+32)] and a "Law of Thermodynamics" as they call it:
Cp/Cv=5/3
Has anyone else seen this "Law" before...
This is an FYI post.
Folks I've been doing electronic packaging for longer than I care to admit, but in my career whenever I tell someone that I do "electronic packaging", unless they ask what it means or unless I volunteer what that means, most non-engineers walk away with the belief I work...
Folks, I am looking into publishing some articles on the proper use of GD&T and I've come to believe that others who have done the same have struggled with a tedious publishing process that means working with a 3D CAD program, an illustration program, and a word processor. One combination, for...
Folks,
Maybe 15 years ago PTC made available a huge library of metric and imperial standard fasteners, electronic connectors, pipe fittings, UDFs (e.g. louvers),...
These came in nested family tables. Are these still available free as they were then? Although it was a lot of work to provide...
It took me a while to dig up the solution to this one. It's a fairly realistic SDOF dynamic model of a suspension system subjected to a half-sine pulse of duration T. Since I don't know how to get math into this little forum box, the problem is attached as a pdf. All those who believe they...
Folks:
Is Subject software a Finite Element Method (FEM) solver or a Finite Volume Method (FVM) solver? Please cite your source of information. Thanks!
H. Bruce Jackson
ElectroMechanical Product Development
UMD 1984
UCF 1993
Anyone out there know what component manufacturers will provide the JEDEC nine-resistor DELPHI thermal models for their electrical components rather than just the rough two-resistance thermal models consisting of only ΘJCtop and ΘJB?
H. Bruce Jackson
ElectroMechanical Product Development
UMD...
As electronic products are becoming smaller, the circuit heat dissipations have not reduced accordingly. EEs are becoming more concerned with thermal management and MEs are becoming more concerned with heat dissipation.
Now I've been an ME for a while doing electronic packaging and my...
Anyone out there know what component manufacturers provide the BCI resistance networks for their components rather than just the rough JEDEC Compact Thermal Model (CTM) two-resistance model consisting of only ΘJCtop and ΘJB? Also, I'm not really clear on how the BCIs are defined and determined...
Folks I'm trying to find where I can get an affordable copy, soft or hard. I'd appreciate it if any of you have a spare copy and would like to sell it for a reasonable price or can refer me somewhere where it won't cost upwards of $160 US!
Thanks,
Bruce
H. Bruce Jackson
ElectroMechanical...
