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Type: Posts; User: specfab

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  1. Replies
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    A few points: The illumination source is a...

    A few points:
    The illumination source is a laser with substantial coherence length, so the interference is created (not projected) as a function of recombining the two beams, the direct (reference)...
  2. The specific language that is used in the NDA...

    The specific language that is used in the NDA document needs to be examined well, especially where the treatment of IP is concerned. If there are a lot of prohibitions of possible activity in the...
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    I don't recognize this as a real method for...

    I don't recognize this as a real method for checking flatness of a surface, as I think of that concept. There are interferometric systems that employ "grazing-incidence" illumination, which can be...
  4. ^^^^^^ What Mike said. Plating shops plug holes...

    ^^^^^^ What Mike said. Plating shops plug holes all the time to avoid this sort of problem. Even carbide reamers wear out very quickly on anodized holes.
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    Slightly OT, but I run my Clausing 5914 with hex...

    Slightly OT, but I run my Clausing 5914 with hex bed turret carrying a live center in one of the turret holes. It comes in handy for light work, especially when I need to make a thin flat disk-type...
  6. Thread: new to FEA

    by specfab
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    2,514

    I would suggest you get a good textbook on...

    I would suggest you get a good textbook on materials science and one on stress/strain/mechanics and look for as much background info as possible on this topic. As a short answer to your question, you...
  7. Thread: FEA solidworks

    by specfab
    Replies
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    1,032

    I would agree with what has been expressed...

    I would agree with what has been expressed already, basically that FEA in a computer modeling program can provide a lot of information, but if you don't have the technical training and experiential...
  8. Recommendations for stand-alone electronic design software?

    We are looking to see what's out there for stand-alone electronic design software, capable of both schematic design and board layout. Ideally it has output that can be furnished to a PCB house for...
  9. Thanks for all the observations. My lathe doesn't...

    Thanks for all the observations. My lathe doesn't have any built-in way to do front/back cross-slide work, which would be handy. No provision for cross-slide stops either. I am currently using a...
  10. chamfering both sides of a lathe cut-off operation

    I'm looking for recommendations for an insert and holder that I can use on a manual lathe (12" Clausing), which will be able to put a 45-degree chamfer on both edges of a .062 cutoff blade groove,...
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    A couple of points that I will note from the...

    A couple of points that I will note from the little I can see in your photos (small):

    1. The wiring of the terminals on the motor appears to be using a GREEN conductor as a hot lead. The white...
  12. Replies
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    I would look at that based on the scale of the...

    I would look at that based on the scale of the rest of the pictured items and call it canvas grade, but photos can be deceiving in this day and age. No argument intended, as I'm not the one with the...
  13. I have zero expertise in motorcycle engineering,...

    I have zero expertise in motorcycle engineering, so no subject-specific ideas to offer, but the short-shaft problem you describe may simply be a manufacturing tactic to allow a reasonable assembly...
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    Try Professional Plastics if you need to buy new....

    Try Professional Plastics if you need to buy new. They seem to carry the line of various nylatron products. They might have rems available.
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    The thread diameter in the cloth for L/LE grades...

    The thread diameter in the cloth for L/LE grades is about .010 as it appears in the material, just as a ballpark. The C/CE grade materials are more in the .015/.020 thread diameter range.

    This...
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    Putting on my hat from decades of plastic fab...

    Putting on my hat from decades of plastic fab work:
    L or LE (linen-based) give a finer "grain" structure to the phenolic laminate. The LE designation is essentially an insulating property parameter...
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    This problem is always there, when the measuring...

    This problem is always there, when the measuring equipment becomes more sensitive and has higher resolution, in an environment that is not set up for extreme-sensitivity measurements. I had a...
  18. I have purchased both Procunier and Tapmatic...

    I have purchased both Procunier and Tapmatic heads, although not for the "larger" sizes you list. There are units available for those sizes, but most of my work has been with smaller sizes up to...
  19. Chiron FZ08 MT Precision + machine -- any of them out there in use?

    I am looking at a Chiron machine (in title) as a possibility for some glass/optics profiling work. Just wanted to find out if anyone a.)has any experience with the current Chiron offerings,b.) can...
  20. No guessing required for the "knobs" on the...

    No guessing required for the "knobs" on the sides. Those are indeed for the articulated arm worklamps that were mounted to these machines as a typical installation:
    ...
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    My favorite part of this is the description under...

    My favorite part of this is the description under Manifest: "Lathe Engine Bench". I'd like to have the bench that would support that machine...

    I will never understand the "Store it out in the...
  22. I would agree with some of Robert R's...

    I would agree with some of Robert R's observations, although I would not necessarily think that fused quartz is not a material for the 3" thick part, especially if the components were coming from...
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    Agree with JohnEvans generally, use it for a...

    Agree with JohnEvans generally, use it for a while before you decide to tear it apart, dress the table surface with a stone after getting rid of high spots that a file can see. The green Scotchbrite...
  24. Not intending to shill for Starrett, but the link...

    Not intending to shill for Starrett, but the link here has links to the standards for surface plates. You can also find the Federal Standard separately if you want.

    Precision Granite FAQs
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    Spend the time to get a vacuum set up for dust...

    Spend the time to get a vacuum set up for dust collection. For either material, you will be creating glass particles from the machining process, which ideally get picked up by the vacuum before...
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