Recent content by interestedperson

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    B Calculate needed dimensions of table - Center of mass, levers etc

    Perhaps. I had the Bosch PDB40 in sights first, available here everywhere... half the price of what I got now, and electronic speed control, 12.5kg weight. But it has some aspects I don't like usage wise, like the stupid wheel on the side. Some people complain about accuracy being a bit of luck...
  2. I

    B Calculate needed dimensions of table - Center of mass, levers etc

    "it seems to me that putting a drill press on wheels is a very bad idea" - those wheels have lockable brakes! I wouldn't do it without them. I hope they'll do their job well enough.
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    B Calculate needed dimensions of table - Center of mass, levers etc

    Actually, pretty close :D I'm not going to drill steel, though ;) I have been drilling woods, plastic, softer metal for years with the battery hand drill, every now and then, no complaints, and other neighbors sometimes also build something. I was very unhappy with the results of hand-drilling...
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    Signal transfer properties of a spring-suspended platform?

    What I ended up doing is, using a readily made damped spring thingy, and added the mass on top. I.e. used an old mattress, put the plywood layer on it, and since the mattress is a bit smaller than the platform, mounted some stub legs with hard rubber feet on the outer edges of the platform -...
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    B Calculate needed dimensions of table - Center of mass, levers etc

    My high school physics days are long ago ;) This is not homework, well, other than it is work, at home. For a real application: Very space constrained "workshop", got a bench drill press, and want to build a table on wheels for it, to be able to move it into a corner when not needed. Those...
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    Signal transfer properties of a spring-suspended platform?

    (it seems I don't get how quoting here works ...) As for what this stuff looks like... Well, I have the plywood thing, resting on 4 sandbags of 25kg each, and a carpet on top. I also tried adding thick multi layers of cardboard directly under the pedals to no avail. Some people just put massive...
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    Signal transfer properties of a spring-suspended platform?

    That's right, electronic drum kit, hence the spring-resting platform as an idea - it is solely about (not) coupling sound into the the floor, nothing else.. Alas I can't edit the topic anymore, or I'd make it stand out more.
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    Signal transfer properties of a spring-suspended platform?

    Ok, the last time I did something with physics, save for simple in-game simulation of gravity, was many moons ago in high school. I certainly did not learn to do this in high school, although two subjects I had there at a basic level, are touched: Waves and Classical mechanics. I have no idea...
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    Model electron movement in an electric field (Magic Eye tube)

    Hello there, I'd like to model a simplified version of a "Magic Eye" tube (e.g. without the amplification triode, and for a start, 2 dimensions only), or the visible display behavior. What I'm talking about: https://en.wikipedia.org/wiki/Magic_eye_tube#Operation Here is a nicer depiction of...
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