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Recent content by drawoh

  1. drawoh

    Connector to casing assembly design

    Replace your connector with the bulkhead fitting. The bulkhead fitting will attach to your bulkhead and to your hose.
  2. drawoh

    Combating rebound of objects

    What sort of a student are you? We have a forum for students to post in. If two steel objects collide, the kinetic energy is converted hopefully to elastic deformation. The elastic deformation then converts back to kinetic energy. Any deformation other than elastic is what we engineering...
  3. drawoh

    Connector to casing assembly design

    AriRnD, What you need is called a bulkhead fitting. Your part is not properly retained in your hole. Is the flange connection supposed to be sealed? Forget it. A bulkhead fitting is retained into the panel by a nut, by screws, or by snapping in. Your hose is attached to a completely...
  4. drawoh

    Perpendicularity callout with curved datum

    bc23, Is this your drawing, or are you trying to interpret something somebody else has done? Your hole can be perpendicular to your datum in one axis only. Your curved face defines an axis, at least, geometrically. Have fun figuring out where this axis is in your inspection lab. If you...
  5. drawoh

    How to accurately and quickly convert inches to millimeters in technical drawings?

    If you redraw your part in 3D CAD, you can reproduce the drawing in inches, and quickly check it from the original drawing. If NX is anything like Solidworks, you just change the drawing units. The tolerances will convert. In Solid works, you must convert feature control frames manually. Can...
  6. drawoh

    Can I omit Basic dimensions?

    Ctopher, The STEP 242 models provide dimension information. What do the 3D PDFs do? If I have a drawing with dimensions, I can measure with scales, calipers, and micrometers. I can set up gauge blocks and dial indicators on the granite block, and I can design tooling and get someone to check...
  7. drawoh

    High-Temp Electromechanical Solenoid

    I designed a laser shutter that had a descending force spring. It took around a pound of force to start it opening, and then it dropped to a fraction of an ounce in the open position. I selected a motor to actuate it such that it required 10V to open, and 1V to hold open. Thus, I minimized...
  8. drawoh

    Social Media

    Sparweb, Oglethorpe's authority comes from you assigning it to him. I agree that QA procedures must be reviewed and updated periodically. The fact remains that you claim to have QA. You promise to follow QA procedures, and then you follow them. As your insurer or customer, I am an...
  9. drawoh

    Can I omit Basic dimensions?

    You may leave out the basic dimensions if the fabricator has your 3D model. Is this a good idea? How will your vendor and you inspect your part?
  10. drawoh

    Social Media

    I have already replied to this, but I am thinking it through a bit more. For fifteen years, You have been working with and supervising someone named Oglethorpe. You have a task to be assiged, and you know that if you give it to Oglethorpe, it will accomplished quickly and effectively. You...
  11. drawoh

    SOLIDWORKS: Cloud 3D CAD browser-based vs locally 3D CAD installed

    Here are some links on cloud based servers... Dead retailer's 'customer data' turns up on seized kit, unencrypted and very much for sale Here is a fun link from the article above... NCIX, Able Auctions, and Bowra Group Data Breach
  12. drawoh

    SOLIDWORKS: Cloud 3D CAD browser-based vs locally 3D CAD installed

    CAD2015, I have been playing a bit with the cloud-based OnShape. My precious files are stored on servers located somewhere, and controlled by PTC. I am at the mercy of their security and any future business models. I would prefer it if my data were stored on my hard or solid state drive...
  13. drawoh

    Manhole Design approach

    I asked ChatGPT about "bristol centaurus engines". It got the number cylinders right. It got the displacement wrong. It listed three aircraft in which it was used, one of which actually did use it. It did not mention the sleeve valves it used. Should ChatGPT have anything whatsoever to do...
  14. drawoh

    Social Media

    There was a message thread on Eng-Tips by someone with a criminal record for breaking and entering, a product of being young and stupid. They were wondering if it was possible to become a licensed professional engineer. The licenses and/or certificates are an indication that we will display...
  15. drawoh

    21 mm vs 20 mm timing belt width. Can they be interchanged?

    Life is a bowl of problems, The belts are different from each other. This is not just the width. Is this your design, or are you replacing the belt from someone else's design? If some else specified this, maybe the material mattered more than the width. Have you looked up the torque and...

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