We're going crazy in our small office/assembly area with the unwanted spam or junk phone calls. What I'd ideally find would be a COTS program/electronics package that I could add to our 3 computers. I'm sure I can't find anything with all that I'd like so maybe I hire an engineer to build and...
I keep reading that the earth gets rid of its energy by radiation. But to what? Don't you need 2 masses at different temperatures for radiation to occur?
The trailer being towed by the car in front of me had the trailer yawing side to side. I've seen this before but have never seen one go unstable. This one did. Sure looks like an oscillating spring mass system - usually critically damped, underdamped in this case. I was wondering what the...
I'm sure it's been talked to death but I'll post it anyways. I personally don't think temperatures in the shade have changed much but step into the sun and it's terrible. So what is it about the GH gases that make the sun feel so hot? Seems like radiation to me.
I've had small and large SUVs all do the same thing. Seems like there is a preset camber that wears the outer portion of the tread. I haven't noticed it so much on cars. Maybe I'm just cornering too fast?[bigsmile]
We currently use aluminum bronze but the per price piece of the castings has nearly tripled from the price about 4 months ago. Many years ago the company made the blanks out of cast (gray) iron but found that if they came out of the foundry above a certain hardness level, the teeth would break...
Was looking at changing the order we stamp out and paint some .093" thick x 2.82" diameter aluminum discs. Right now they are stamped from sheet and then painted (powder coated - one side only). The outside painter would like to paint the sheets before stamping and apply a protective covering...
So I've often wondered the above. I finally googled "does shear rate affect machining". There's lots of scholarly papers written on the subject - I'm sure most of them are tough reading for me. So I hoped one of you would be able to offer a "dumbed down" explanation. It's generally well...
The controls for the motors for our winches have been using a big old, 60 hz. transformer, linear PS for over 15 years. It works fine. I'd like to switch over to an SMPS for the size and the universal input (about 85 VAC to 265 VAC). We use a microcontroller to turn on relays via NPN...
I'm comparing two aluminum bronze cast materials, 953 vs 955. We currently use 953 for our worm gear blanks. A vendor has quoted doing them in 955. I like the higher strength of the 955 (we're trying to optimize the shape, less material, higher stresses) but it comes with decreased...
I'm trying to get a rotary table I bought years ago for my mill running. It uses a Yaskawa servomotor and encoder. The encoder is marked "incremental". From what I can tell from the documentation I've been able to find there is only one output from the encoder. So without quadrature outputs...
Hopefully this won't get red flagged, I'm just curious why cleaning the air ducts in my home would significantly increase the flow but for only a week or so. It's happened twice now. What I've thought was:
1) If the cleaning gets down to bare metal then maybe the friction is dramatically...
The plug end is see-thru and there is a light that glows when the cord is plugged in. What type if light is that? Neon maybe?
Sorry for the boring question!!
I've found a torque cell that would work for me:
http://www.interfaceforce.com/index.php?T11-Bearingless-Rotary-Torque&mod=product&show=66
I'd like to understand how it supports the spinning shaft without bearings. I'm a bit familiar with hydrostatic bearings but it's not that. I thought...
Back when I was in school no one talked about Von Mises. I'd like to learn more about it. Whereas for simple bending or axial loading you can start out with the Endurance limit = .5 * Ultimate stress, is there a way to use Von Mises stress to predict endurance limit? Say, Endurance limit =...
I'm looking to make a switch with a variable resistance - much like what you see on power tools. Our space is very confined so I can't order a standard power tool trigger assembly. I've taken apart a few switches and it looks like maybe a conductive ink is used on the circuit board with a...
Some of the castings we get from the foundry aren't quite as straight as I'd like. I'd like to pull those out, weaken them, hammer them straighter and then re-heat to T6 state. What do I need to do to get the part back to the weak (as cast) state?
I have an application where I'd like to print a carbon track on a PCB which will be used as a variable resistor. My switch will slide along it. I can find vendors that sell inks and also my circuit board maker says he can do it but I would like to see some guidelines for design. I'm...
The type of foam I'm looking for is the type where component leads can easily be pushed into/through. I know it's available because Digi-key and others use it on stuff I buy. Vendor's descriptors for their foams aren't very helpful on this attribute - I've ordered from 3 of them and none have...
