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Can anyone give a "Chalk Talk" on the theory underlying Spherosyn scale and encoder operation?
No you don't necessarily "need" or want the "sharp change" in the IN-PUT signal IF the sensing can measure and digitize the analog signal to sufficient number of decimal places.. For example the "signal" from the pickup could be a linear voltage change from 0 to 10 volts over a distance of 10... -
Schools could use your help!
You would think they'd want all the free help they could find. BUT it depends on the "teacher". I volunteered for 20 years in the metal shop then after the Covid fiasco and a new teacher that appeared to not want anyone in the shop that knew more about a lathe or mill than he did it ended. He... -
AirCraft Aluminum?
Send those back with a "Inadequate Information" and a NO QUOTE. :-) ...lewie... -
Not really off topic: Anyone ever make an urn?
A few years back while I was volunteering in the high school metal shop, the wood shop (next door) did a group job of a whole bunch of wood ones for the org. that takes care of the "homeless / indigent" population of Abq.. I would guess about 50 or so. I was NOT impressed by the joinery. :-)... -
OT: Where to buy/get small quantity of iron ore?
:-) I could help you out if I was back home in central PA and you were a lot closer. I grew up a few miles from a open pit mine from the 1800s that was re-opened up during WWII for one or two rail cars of ore. :-) ...lewie... -
Bob Hem / ESS / Carbide Bob . . . posting from beyond the grave?
A lot of that has been interesting. I'm a Junior which was a pain in the neck being called JUNIOR the whole time growing up but after that I just signed Jr on everything untill my dad died ofer 30 years ago. I now only use the Jr on my checks and other Legal documents. lewie... -
O/T - Electronic circuit help?
Yep just like so many other posts, the writer knows what he MEANS but us reading it only know what he SAID . Just like a post on another BB I read and responded to today. :-) ...lewie... -
OT: What about the Chevrolet 2023 EUV? Do you own one?
:-) < 'stripping the earth of its natural resources' > Isn't that what they are there for? Just what good are they if we just sit and admire them. Just like money, it doesn't do you a bit of good sitting in a safe (or a bank?). It only benefits you if you SPEND it. ...lew... -
Making a handrail - angles don't add up - what am I missing geometry-wise?
:-) Machinists have no business doing "stairs / Handrails" stuff, that is Carpenter domain. :-) ...lewie... -
OT viewing upcoming eclipses safely.
I hope you get a better focus when you do the actual shots. :-) ...lewie... -
tramming mill with brake rotor (practical machinist advertising)
Worked fine for a lot of years for a High School metal shop . :-) ...lewie... -
OT - Outdoor storage without rust
Just read this thread. :-) Just ship it here to Albuquerque and I'll throw a tarp over it to keep the bird droppings off . No need for any other protection. :-) ...lewie... -
Under-size drilling for a tapped hole. Bad idea ?
:-) Unless you're arithmetic challenged just do the same for all threads. :-) ...lewie... -
lattice tower slope angle
:-) First thing, get rid of the "Shakes" (vibration) and the wall mount will be good. :-) ...lewie... -
college versus trades
:-) Until you get a Boss that is a PITA . That was the case where I "worked", it was more like fun, for nearly 20 years, the Co. gets sold and some idiot takes over who knew nothing about the kind of work we did and it all went to hell. This was in the electronic field but I can imagine it... -
tangential tool holder
Love it. It always bothers me when I read posts with terrible English . I do make exception for folks with ESL (English as a second language) . :-) ...lewie... -
sine bar setting height
:-) Well my sliderule says for 7 degrees . :-) ...lewie... -
Boraxo hand soap
Is D&L still around? In the blue and white cans ? My dad used it when I was a teen ager 75 years ago. I haven't seen it in ages. ...lewie... -
O.T. someone is proud of this stuff.
:-) K. F. Gauss "Nothing shows the lack of mathematical education more clearly than excessive accuracy in calculating" 4 decimal place accuracy on the overall sizes. WOW! . :-) ...lewie... -
OT: aging and decluttering
I don't see how you can get rid of the "hobby" machines etc. at all until you either get so incapacitated you cant operate them or you die, because there is always the small job around the house that needs just a bit of something. The wife came home Friday from her job at school (she's 85 and...