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  1. rsm7400

    Composite Profile

    What I am trying to control: The customer print only has [prof|.xxx|A|B|C] with a pretty loose profile in the ".xxx" tolerance. For our internal manufacturing and further processing of features not show, it does not matter how the sphere is shifted up and down, but it does matter left/right and...
  2. rsm7400

    Composite Profile

    I have a SR machined into the top of a block. The bottom is datum A, the long side datum B and the short side datum C. Basic dimensions are given from each of these faces. We have profile of .020 but want to refine the shape to be within .005 For a composite tolerance I know the top line...
  3. rsm7400

    Uneven suspended load/counterbalance

    Yes thank you :) I was aware of that but good to restate it. We just moved the part with the gantry moving very slow. All was stable and flat and loaded up very nicely! ________________________________ Ryan M Quality Engineer 3d Printer Hobbyist
  4. rsm7400

    Uneven suspended load/counterbalance

    Thank you so much! I havent touched statics in 15 years, the last place I worked we could pick up every part/fixture by hand. ________________________________ Ryan M Quality Engineer 3d Printer Hobbyist
  5. rsm7400

    identify these machines

    No one ever expects you to know everything. I ask questions all the time at my new job and have been here nearly a year. No one should be upset by you asking. Just don't ask the same questions repeatedly - then they will get upset As others have said, you definitely have a shear and a bandsaw...
  6. rsm7400

    identify these machines

    No one ever expects you to know everything. I ask questions all the time at my new job and have been here nearly a year. No one should be upset by you asking. Just don't ask the same questions repeatedly - then they will get upset As others have said, you definitely have a shear and a bandsaw...
  7. rsm7400

    Uneven suspended load/counterbalance

    I'm sure this question is easy but I do not remember my statics calculations right now haha. I have a beam that is 79" long and weighs 130lbs. I have a part that weighs 190lbs that will be uniformly suspended by 2 straps 44" apart. The first strap needs to be hooked on the bar started at 4". I...
  8. rsm7400

    Localized Datums in a print with patterns

    Awesome! Thanks for the inputs. I knew there had to be a way my brain just couldn't figure it out yesterday afternoon. I already have over a dozen edits for the new engineer who drafted the real print. Tons of missing information and then over constraints in many locations. [upsidedown]...
  9. rsm7400

    Localized Datums in a print with patterns

    I have large rectangular part with several identical patterns in different locations with datums called out to the main part and some features to the localized pattern. See the mockup sketch attached, these are not my actual features but mimic what I am seeing. Yes I know I didnt draw all the...
  10. rsm7400

    Machining of Silicon Nitride

    Anyone out there have familiarity with grinding Si3N4? We do some work with it and are able to do a lot of grinding in the unfired state, but in the fired state we tend to eat up tools very fast. I know this stuff is tough to machine but not sure why we break so many tools...
  11. rsm7400

    Need help identifying old resistor

    One chart found said .5-1W but now on that previous chart I see that it is likely .75W and the B is just a temperature coefficient ppm, which probably doesnt matter in my application. I appreciate your inputs, and hopefully I will have the tester running by Friday...
  12. rsm7400

    Need help identifying old resistor

    Ok so searching it by "RN70B1021F" brings up 4 results in google but the information has not provided me that much information, I want to find an equivalent resister. I get more information by searching just RN70 but it is still incomplete. https://www.vishay.com/docs/31027/cmfmil.pdf...
  13. rsm7400

    Need help identifying old resistor

    Thanks for the help, I didnt try searching as one line of text. ________________________________ Ryan M Quality Engineer 3d Printer Hobbyist
  14. rsm7400

    Need help identifying old resistor

    I have an old resister that blew in a piece of equipment that I need help identifying. It is not like normal resistors that I work with. This is exactly what is written on it: 1.02K CLARO RN70B 1021F CMF 1% Can someone tell me what I am looking at? I know 1.02kOhms, and I'm guessing 1%...
  15. rsm7400

    Profile Applied to Slotted Hole

    Thank you for your input. I realize it wasnt quite drawn correctly - that was my quick Microsoft Paint drawing of the features. It is correct on the actual print with different dimensions and tolerances. The reason I asked these questions was for the inspection of these features. My Optical...
  16. rsm7400

    Profile Applied to Slotted Hole

    Attached is a quick drawing I have for a part we are working on. With a profile of .001 applied to the .071 feature and a MMC bonus on datum A what is the min and max of my .071 feature? My interpretation was that I get a ± .0005 band around the slot. Meaning the slot can be .070 to .072 in...
  17. rsm7400

    Percent Thread Called Out on Print

    I did end up verifying with the customer. This is what they want. They will be epoxying some components into the threads on our part and wanted a little extra room. We are using the chart in the link below for slightly oversized drilled hole...
  18. rsm7400

    Percent Thread Called Out on Print

    Good morning Eng Tips Community. I have a print that is calling out a thread as listed below: M3 x 0.5 Thru 55% Thread What does the 55% thread mean? This is the first time I have seen this on my 1000's of unique part numbers. Thanks ________________________________ Ryan M Quality...
  19. rsm7400

    Positional Tolerancing Boundary Concept Angled Slot

    Yup I think I can understand it better now. I will be inspecting this on a CMM that compares to a CAD file, however I wanted to make sure I understood it a little better so that if a part gets rejected I can explain it to powers that be. Thanks for your assistance...
  20. rsm7400

    Positional Tolerancing Boundary Concept Angled Slot

    Thanks for replying so fast. That illustration is much better than the one I had on file. My only comment is, on my print it does not specify boundary, that was just the only section in the book that looked similar to me. If mine does not say boundary do different rules apply? I have set up...

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