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171CommentsJoined February 25th, 2008

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  • skrubol commented on Marsh's instructable How to Make Retractable Casters!1 month ago
    How to Make Retractable Casters!

    Should be fairly easy to do without a welder. Just need a bit of imagination (use a door hinge instead of the pivot he welded? Of another piece of square tube slightly larger or smaller that could be cut and drilled.)

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  • skrubol commented on mikeandlauren's instructable DIY Powder Coated Yeti Cups1 month ago
    DIY Powder Coated Yeti Cups

    Old working ovens can be found on Craigslist for pretty cheap (or roadsides for free.) Biggest cost would probably be getting the 30A 240V electric service where you need the oven.

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  • skrubol commented on makjosher's instructable The Ski Sled3 months ago
    The Ski Sled

    You mentioned an angle grinder and aluminum. Grinders with abrasive wheels (other than specialty aluminum specific wheels,) should NOT be used on aluminum. Aluminum will clog up the wheel and ruin it, or worse can make the wheel shatter. This goes for angle grinders, bench grinders and abrasive chop saws.You can get away using a table saw, miter saw or other circular saw normally used for wood on aluminum with the right blade. They typically run a bit too fast for aluminum though, so the blades won't last too long if you can't reduce their speed.Milling machine and a carbide chop saw would be the best tools for doing the cuts you did. But if your options are an angle grinder and a hack saw, the hack saw is by far the better tool for the job.

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  • How to Carve Liquid Plywood Patterns on a CNC Machine

    FYI MeshCAM can produce toolpaths from grayscale images directly (without converting to STL) the last I knew.

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  • skrubol commented on LeoP20's instructable European 4 in 1 Chainmail Shirt7 months ago
    European 4 in 1 Chainmail Shirt

    So these are left as open links? (IE C's, not O's?)

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  • skrubol commented on Phil B's instructable Twist Drill Sharpening Helper7 months ago
    Twist Drill Sharpening Helper

    In my (limited) experience with a Drill Doctor, they can be very effective, but they aren't as easy to use as you would think. If you don't follow the instructions to the letter, (and iirc there are some counterintuitive things in the instructions,) you will not have good results. I think the DD should be good for sharpening a bunch of bits at once, because if you've got a bunch, you can afford to sit down and re-read the instructions and do it right. DD regrinds split points as well. I think if I only had 1/4" and larger drills to sharpen I'd do it by hand. A jig of some sort is more critical on the smaller bits.

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  • skrubol commented on KJMagnetics's instructable World's Simplest Electric Train7 months ago
    World's Simplest Electric Train

    Close enough to pass electrical current through the magnets to the copper.

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  • skrubol commented on michael.j.feierstein's instructable Table Saw Rust Removal7 months ago
    Table Saw Rust Removal

    For preventing rust I've heard CLP (Cleaner Lubricant Preservative) by break-free is one of the best out there. I can't remember which formula is best for tools, but it's a much heavier oil that leaves a thin, slippery coating.Probably worse than the WD if you're going to be using it with wood right away, but I would expect it to do much better at holding the rust off if you're storing it. You'd probably need to clean the CLP off with something like WD-40 before use.

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  • Industrial Isolation Transformer From Trash

    Aren't ballast transformers often current limiting (usually with some magnetic gap or something similar to how simple AC stick welders work.)?

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  • The Maven Box: an Arduino Controller for Software Developers

    The code looks like it'll only count a transition from 00 states to 01 or 10 states. Other transitions will be ignored. Effectively it'll only count 1/4 of the transitions. Is this the intent?

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  • How to Unscrew a Nut that's Stuck on a Bolt (without ruining threads)

    Can't buy MAPP in the US anymore. I guess a few too many cylinders blew up or it's bad for the environment or something. The stuff sold now that resembles it (MAP-Pro) is somewhere in between propane and MAPP.

    I've read this elsewhere as well. Though that's the only quantified study I've seen.Heat still works better, assuming that's an option. Nothing beats an oxy-acetylene torch, propane works as well.

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  • skrubol commented on comsa42's instructable Carbon-Fiber Electric Skateboard Deck10 months ago
    Carbon-Fiber Electric Skateboard Deck

    XPS = eXtruded Polystyrene (pink or blue wall board insullation) and EPS = Expanded Polystyrene? (usually white, like disposable coolers and rigid packing material.)

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  • How to Make Drinks Coasters With Nails Inlay

    Evolution makes blades as well and they're decent blades. Looks like the only table saw they make is a 10" 2500 RPM saw, gear drive, brushed motor (looks like.) Looks to be the same motor assembly as out of their 10" miter saw (which I have.) One negative of their 10" saws, they have a 1"(25mm) arbor, which won't fit most blades. Their general purpose blade is good for wood, but pretty lousy for aluminum, chips get stuck between the teeth too often. Their aluminum only blade is $100+ and I've yet to find a 3rd party aluminum blade with a 1" mounting hole.Most belt drive table saws can be under-driven if you replace the pullies. I've done this on my Craftsman and now have a 2-speed saw, 3450 RPM for normal cutting, 1725 RPM for cutting aluminum (with the ap...see more »Evolution makes blades as well and they're decent blades. Looks like the only table saw they make is a 10" 2500 RPM saw, gear drive, brushed motor (looks like.) Looks to be the same motor assembly as out of their 10" miter saw (which I have.) One negative of their 10" saws, they have a 1"(25mm) arbor, which won't fit most blades. Their general purpose blade is good for wood, but pretty lousy for aluminum, chips get stuck between the teeth too often. Their aluminum only blade is $100+ and I've yet to find a 3rd party aluminum blade with a 1" mounting hole.Most belt drive table saws can be under-driven if you replace the pullies. I've done this on my Craftsman and now have a 2-speed saw, 3450 RPM for normal cutting, 1725 RPM for cutting aluminum (with the appropriate blade.) Would work fine for this as well.

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  • skrubol commented on JON-A-TRON's instructable 3D Printed Wireless Lantern10 months ago
    3D Printed Wireless Lantern

    No current limiting for the LED? An LED like this direct driven by a lithium ion battery won't last long, especially with the minimal heat dissipation of a little LED star stuck in a plastic box.I'd also think the brightness varies significantly with the charge of the battery?

    A 2-3 ohm .5+W resistor will protect the LED, but not help with the brightness variation.I thought I'd be able to find an inexpensive LED driver for running from a single Li-ion cell easily, but I can't.I did find a basic driver chip that may work:http://www.sunrom.com/p/amc7135-dc-led-driver-ccThere are some example circuits on the page.

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