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  1. In an arcing circuit the voltage rises to the...

    In an arcing circuit the voltage rises to the breakdown voltage and suddenly draws a large spike of current until the current drops to basically zero on every half wave.

    In an SCR motor drive the...
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    Talking out of my ass here but I look at some...

    Talking out of my ass here but I look at some people's (good) hobby mills that have 24krpm spindles and they use small endmills at high speed to take stupidly small chips at a decent feed rate. Those...
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    Dry receivers are the best IMO. People keep...

    Dry receivers are the best IMO. People keep advising us against it but their reasoning didn't add up to me, especially with the aftercooler built in to our compressor. Just size the dryer for the...
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    Nobody mentioned the fun approach of a three...

    Nobody mentioned the fun approach of a three phase motor running a few alternators in parallel
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    Our Ingersoll Rand stuff has been pretty low...

    Our Ingersoll Rand stuff has been pretty low quality honestly.

    We got a Quincy air dryer to replace the broken integrated one on our screw compressor and they are so far one brand that hasn't...
  6. I did find that McMaster has some nonporous...

    I did find that McMaster has some nonporous alumina tube with a thermal conductivity about 15 times that of glass or fused silica. It's still only about a tenth of that of aluminum, but I think it...
  7. I tend to use sealed reservoirs and suction pumps...

    I tend to use sealed reservoirs and suction pumps on coolant systems to prevent leaks, so up to -5 psi from ambient is the max it could see, and likely much less.

    I do actually have quite a few...
  8. The most convenient would be a section of tube...

    The most convenient would be a section of tube with a water jacket
  9. Material for corrosive liquid heat exchanger

    I have an interest in dye lasers but some of the gain media I'd like to try is very corrosive. Either the solutions themselves contain lots of chlorine ions, or need to be in an acidic solution to...
  10. I've done brakes on a forklift. Squeaked before...

    I've done brakes on a forklift. Squeaked before and after, and not from a squealer. Our newer forklift squeaks under hard braking, and my 60 year old forklift did too, when it had brake fluid.
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    I mean torsional rigidity, i.e. twistiness....

    I mean torsional rigidity, i.e. twistiness. Thrust stiffness is a pretty valid point though.
  12. The motors weren't identical but the internal...

    The motors weren't identical but the internal fault code, lack of voltage output, proper voltage input, and a functional encoder were the main indicators
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    Why no hollow ballscrews?

    Any ballscrew system has the inherent tradeoff of rigidity vs inertia (aside from rotating ballnut systems). I was wondering why nobody (that I am aware of) makes hollow, large diameter ballscrews?...
  14. Yes. A very old fixed gantry Mitsubishi laser at...

    Yes. A very old fixed gantry Mitsubishi laser at my old job had a XZ drive for the laser carriage and head, and a bigger Y drive for moving the entire 4x4 table. The Z drive was on it's way out and...
  15. I prefer an aluminum top. It protects what I'm...

    I prefer an aluminum top. It protects what I'm working on, is cheap enough, and light weight.
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    Another vote for a 350P with a push pull gun....

    Another vote for a 350P with a push pull gun. People think we TIG weld our stuff.
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    For sheet metal and plate I have found that the...

    For sheet metal and plate I have found that the speed of the bend doesn't matter at all, as long as you can stop at the same position every time. On cheap manual tools the pressure you apply against...
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    Aluminum laser slats

    The steel slats of our HK laser are melted down to pretty much nothing now and it's time to replace them. Scratching, indentation, and steel splatter on aluminum parts are a constant nuisance, so I...
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    They're also called ring blowers. I use one for...

    They're also called ring blowers. I use one for sand blasting breathing air.

    We're going to plumb it better because it's so useful for blowing clothes off, blowing sand off of parts and out of...
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    If you can tolerate a gap between the sheets you...

    If you can tolerate a gap between the sheets you can form a channel on the outside with a screw pulling a wedge in.
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    I actually specced out everything for a press...

    I actually specced out everything for a press brake and bought most of the stuff a while ago. We bought a brake so I'm repurposing the stuff.

    I used rotary flow dividers, and leadscrews to adjust...
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    I'd personally use a series parallel circuit to...

    I'd personally use a series parallel circuit to keep 8 ohms impedence per channel, and just have an amp that can drive 8 ohms at 1000 watts between channels.

    I see many amps on amazon or ebay that...
  23. Is a phase perfect really that expensive that you...

    Is a phase perfect really that expensive that you would rather buy and wire in an oversized vfd, a filter, and a transformer to have not quite a guarantee of running the machine without tripping? And...
  24. Replying to basically only the first post here. ...

    Replying to basically only the first post here.


    There exists a point where the increased operating efficiency more than makes up for the carbon footprint of producing the new unit. Air...
  25. Have you looked into purpose built static phase...

    Have you looked into purpose built static phase converters? Basically just VFDs with better filters and DOL starting capacity.
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