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  • Users: dgowans
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  1. dgowans

    how to validate that a unit is sealed

    Our products generally consist of a PCB assembly that gets sealed in a plastic enclosure (roughly 8"x4"x1.5") via a hot-plate welding operation. Our current method of verifying that the welding operation produced a fully sealed unit is to heat the sealed product for a period of time sufficient...
  2. dgowans

    elevated melt temp causing pigment degradation?

    I have a situation where parts molded from a 10% GF, UV stabilized, FR polycarbonate are changing colors, sometimes drastically, after a period of time (<1.5 years) in the field. Consultation with the material supplier ruled out UV exposure as the cause because the discoloration is not...
  3. dgowans

    ink adhesion standard

    I need to clean up/add some specifications on molded parts that get printed either via pad printing or silk screening. Is ASTM F1842-02 the best standard to reference in my specification or is there some other standard that people have found to be better? I'm located in the US.
  4. dgowans

    GD&amp;T suggestions needed

    I have a situation that I need some help with - here's the background: A) I am not by any means well versed in GD&T B) Even if I knew GD&T inside and out, there are other groups within my company (QA) that either don't know GD&T or don't have the equipment to inspect drawings that contain GD&T...
  5. dgowans

    network licenses / access to add-ins

    The recent press release about the acquisition of CircuitWorks got me thinking about upgrading one of our licenses to Office Premium. I don't think in my case that CircuitWorks alone is justification enough to upgrade (although it's close), but CircuitWorks plus the other functionality that...
  6. dgowans

    angled dimension in projected view

    I'm having a brain cramp and can't find this in the help anywhere. I've got a projected view of a part that I'm dimensioning. I want to add a dimension like the one circled in the attached JPEG, but I can't do it without first adding circle centers that are at an angle to compensate for the...
  7. dgowans

    Real Insights

    Did anyone else receive an e-mail from SWX that's similar to: What's the story here? Any of you who work for VARs care to comment?
  8. dgowans

    nylon 12 vs. nylon 6/6

    What are the major differences between these two grades of nylon? I've found that nylon 12 is more resistant to chemicals, and I've also seen that nylon 12 may retain more of it's mechanical properties after UV exposure. Are there other significant differences? I've received a request from...
  9. dgowans

    SWX and TeamCenter

    Anyone using TeamCenter with Solidworks? If so, what's your opinion of how well this works? We're currently using PDMWorks and have no issues with it, but TeamCenter offers a lot more than just data management. We've got a sister division using TeamCenter and I've started to investigate how...
  10. dgowans

    Carolina Molding / tamper evident seals

    Does anyone know of a company named Carolina Molding (possibly Carolina Plastics) that sells tamper-evident security cups / security seals similar to the ones shown at the link below? http://www.bentleyco.com/site/988281/page/724826/site I've gotten samples of the products shown in this link...
  11. dgowans

    Cavist / low-pressure encapsulation

    Does anyone have any experience with Cavist and their low-pressure encapsulation process? I've got a project that lends itself to overmolding and I'm interested in this manufacturing technique. If anyone has any experience with this that they're willing to share I'd like to hear it. Thanks in...
  12. dgowans

    Symmetry Bolt

    Does anyone have any experience with these (www.botex.us)? I've seen information on Nordlok, Spiralock, etc. and was just wondering whether anyone has actually used these, or better yet, tested them to see how well they retain bolt tension?
  13. dgowans

    VBA / DWGeditor

    Can anyone point me to a resource that outlines the differences between programming in Autocad and programming in DWGeditor? We're in the process of developing a VBA program to automatically generate assembly drawings of PCB assemblies based on data exported from Orcad. The program currently...
  14. dgowans

    measuring within free eDrawings viewer

    Does anyone know if it's possible to do a measurement in the free eDrawings viewer if you're viewing native SWX data? I know that actual eDrawings files need to be created with the measure option enabled for the measurement tool to work in the free viewer, but I would have suspected that...
  15. dgowans

    moisture ingress through thermoplastics

    Can anyone point me in the direction of any research that has been done on moisture ingress through thermoplastic materials? We've got existing products that consist of a PCB assembly sealed in a thermoplastic enclosure via a hot plate welding process. As we look to expand our product line...
  16. dgowans

    2D to 3D service bureau

    For those of you who have the need to generate a 3D model from legacy 2D data, I offer the following: www.innovate3d.com The price is most definitely right, whether you get in on the free offer or not. I can't speak to the quality of the model received as I've not used the service. If anyone...
  17. dgowans

    Solidworks 8.0?????

    Has anyone else heard that the next release will be 8.0? I saw this in the following article: http://designnews.com/article/CA6421352.html?nid=2332&rid=1787405371 I don't particularly care what the next release is called, I'm just curious. Interesting stuff on the IP security that will be...
  18. dgowans

    client poaching from the poachee's perspective

    The client poaching discussion has been done many times, but I don't remember seeing anything from the client's point of view. I received a call from people who were formerly at a place I've used when I've had the need to outsource design work. These people have left the first place for...
  19. dgowans

    DWGeditor - opinions?

    As someone who knows squat about Autocad (yes, I do consider myself lucky) I'm wondering what those of you who have actually used Autocad think about the DWGeditor. Is it worth a crap? I know SWX wants us to think it's an ACAD replacement, but in my very limited experience it's not. I could...
  20. dgowans

    IDF import

    Apologies in advance for a somewhat off-topic post..... I've been playing around with the IDF import capability (CircuitWorks lite) that's bundled with SWX. I can get basic board geometry to be created, but I'm having no luck getting any SMT components to be created with height - they come in...

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