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    Gadget for grinding gravers with rounded shapes from blanks

    There are now BLDC Motors for lawn mowers ect. which could run at low speed and full torque with a suitable controller. I was tempted to use one of those for the next minihone I‘m going to build, but with about 20 of the DC motors still in my stock I will stick to the Johnson motor.
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    Gadget for grinding gravers with rounded shapes from blanks

    Hi Papart, it is a 12V DC Motor from Bühler, also built by Johnson Electric. They where available at 1 Euro / pcs. at an surplus electronic shop. Years later I found where they are actually build in: pumps for parking brakes of Diesel cars, e.g. BMW. They are very quiet, have a high torque and...
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    Gadget for grinding gravers with rounded shapes from blanks

    Hi Monk, can't post there, have not got the right membership...
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    Gadget for grinding gravers with rounded shapes from blanks

    Hello, I made a simple gadget that allows to grind gravers with rounded shapes from blanks. Up to four radial stops permit to set start und stop angles. A round bottom graver would require two stops, an onglette or oval graver reqires four stops. The onglette in the pictures has got 120° tip...
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    Question: Advice wanted - publish a new gadget here or try to market it?

    Getting a patent in Europe is a time consuming, expensive task. Already for a german patent that would cost me several thousand Euros. More a again for a european patent, and again for a world wide one. I don’t believe I could earn that much back. Hence the idea to market it through an...
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    Question: Advice wanted - publish a new gadget here or try to market it?

    Thanks a lot, Allen! The amount of time it would take to turn the prototype into a product, build and market it is exactly what frightens me. Cheers Ralf
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    Question: Advice wanted - publish a new gadget here or try to market it?

    Hello Mike, 3D Printing is a good idea. Thanks for suggesting it. The prototype of the “heeler“ is machined out of brass plate and rectangular profile and requires only a jigsaw, a drill press and some filing/sanding. I designed it that way to avoid any need for precision milling&turning. With...
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    Question: Advice wanted - publish a new gadget here or try to market it?

    Hello, as I promised in a post in January ‘25, I designed and build two gadgets to shape and heel rounded gravers. The first gadgets allows to grind gravers with rounded shapes (round bottom, onglette, lozenge…) from round blanks, start and stop angles of the radii can be well defined. The...
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    Depth of Field for Meiji EMZ-5 microscope

    Hi Dennis, I stand corrected… after re-reading your post I understand… Cheers, Ralf
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    Depth of Field for Meiji EMZ-5 microscope

    Hello Dennis, if your microscope changes the focal distance while you change the zoom, it might not be adjusted to parafocality. How much does it change? Some mm can be compensated with this adjustment, severe changes in focal length might have different reasons. Cheers Ralf
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    Depth of Field for Meiji EMZ-5 microscope

    I‘ve got no specific information about your Meiji microscope, but found an interesting snippet in an article about Nikon microscopes. The conclusion there was, less zom factor + higher magnification oculars = bigger depth of field for the same magnification
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    Question: Leica microscope s9d

    Don‘t forget the parafocality adjustement: It literally saves you headaches, and touching the focus knob after changing the zoom factor. You might have to repeat the adjustment to get it perfect, and it depends slightly on the users eye and correction (=glasses) parameters. Cheers, Ralf
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    Saxophone engraving advice

    I visited a wind instrument fair last year and they had an engraving demonstration stand there. YES, the manufacturers use the wriggle cut, the one where the flat graver ist hold high (or steep, if you like) and it‘s tip „walks“ over the metal, leaving a row of traces.
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    GRS foot throttle hissing air even when not being used?

    GRS also has all the manuals available for download, if you want to troubleshoot the pedal yourself first. Sometimes it's the hose that leaks at the barbed connector.
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    why is there no information on laser machines for marking metal?

    I once read somebody tried successfully mustard as laser marking coating… Might smell interesting, perhaps better than burnt away acrylic paint. I like the idea with the modelling clay.
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    Question: question

    Open your account details (top right corner, your initial and your user name) and choose „account upgrades“. Then you will see the different possibilities to pledge money.
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    Question: question

    A pledge membership would grant you rights to post there.
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    Info needed on possible method of creating uniform round bottom to strengthen vee gravers

    Hi Allen, I never tried it with a pre-cut groove, which is BTW a brilliant idea, but I polished gravers held in Lindsay-like templates both on mild steel and extra-hard brass plates impregnated with 0.5 um diamond. As long as one pulls away from the cutting edge, it worked fine. The brass plate...
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    Greetings from Croatia

    Evgeni, I would also very much like to learn some basics from you. Sharpening I mastered, but the learning curve in engraving is still flat. I could do basic things, but often they do not look right… Cheers Ralf
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    Engraving Copper

    Even better, copper will only retain it‘s maximum softness after annealing if quenched in water, cristal growth has to be suppressed, I was tought… AI are not omniscient, they will repeat what they collect in their libraries, the most often heard will become the most prominently cited...

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