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Recent content by greif1

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    Understanding uncertainty and how to report it

    If you use an accredited ISO 17025 calibration lab, they must report uncertainty. Some offer cheaper unaccredited reports though.
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    Optical instrument for PCD insert's setting

    Check out Edmund Optics for their line of telecentric lenses. Reasonable priced and telecentric is a huge boon in a measuring system.
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    Center gage: fake or real

    The engraving looks nice, I say it is real.
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    Do length standards grow over time ?

    I have a 400 mm engraved scale, Made by the Swiss firm SIP. It came from one of their measuring machines. Made around 1960, and came with SIP calibration. I had this calibrated at NIST, came back with an k=2 uncertainty of about 0.3um and the measured dimension matched the SIP values very...
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    SPI Elect-Mike a historical digital micrometer

    Took a while for the filing system of my brain to dig out the original manufacturer, which is Quality Measurement Systems, Inc. of Penfield, NY Here is a mention of the guy that founded it; https://brucerrobinson.weebly.com/ One of the patents for another scale...
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    High accuracy angle measurement

    Here is my take: -Best (simplest) way is to use a set of go, no go gauges , looking for light coming through the gap. This does not give you a quantitative measurement though. -An optical comparator may let you measure directly, some have 1 minute of arc resolution on the rotating screen...
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    High accuracy angle measurement

    I like the idea of making go and no go gauges. Trying to make direct measurement on such short angle leg lengths (to use trig) will result in huge error.
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    SPI Elect-Mike a historical digital micrometer

    I used to use one of those way back. I think it was made by a local company near Rochester NY. Has a glass scale and opto encoder inside. Measures about 1.5 inches if I remember.
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    Tool Scope

    Maybe something from here would work; https://www.titantoolsupply.com/Default
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    Grease discontinued. Switching way lube to oil?

    Nye Lubricants may have a proper substitute.
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    Rotary table/dividing head calibration with theodolite

    A note about damping grease; NYE makes some excellent versions. In optical instruments , it is hard to beat the silky smooth feel with the proper grease. I suggest you use the extra light damping grease, even medium has much more drag than you would expect.
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    Calibrating Mitutoyo 0-12" depth mic set

    Uline is a source for VCI paper.
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    Darkening tool graduations

    Yes, Lacquer Stick; I have used these on cameras too. https://www.amazon.com/MRK51123-co-Industries-Lacquer-Stik-Fill/dp/B002BYWUMO/ref=sr_1_2?crid=14MKVILFHGNT4&keywords=lacquer+stick&qid=1659445878&sprefix=lacquer+stick%2Caps%2C95&sr=8-2
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    - What Brand CMM Should I Buy? -

    For long term accuracy, it is hard to beat granite air bearings on all the axis.
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    OT A1 Canon Camera

    Not a Sony, But the Olympus and Panasonic micro 4/3 cameras can accept any lens. They are mirroless digital camera with very short backfocus so a cheap T type adapter hooks up to any lens.
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