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Position Encoding.

I'm not that mechanically challenged that I couldn't explain why it would be harder to build than a convential absolute encoder, but you've conveniently snipped and "forgotten" the explanation

elevant.

Your absolute encoder isn't going to be cheaper than a standard absolute encoder, and it's probably not going to be any more compact - why on earth would he waste development time inventing the constant- width roller when he could buy a wheel off the shelf?

Even when your "expertise" leads you to suggest that you need two tracks to extract separate in-ohase and quadrature clock signals.

I do point out when people are posting nonsense. They do tend to respond by claiming that they aren't posting nonsense, rather than by recognising that I've done them a favour.

Actually, you are more like Paul V, insisting on your right to claim that a silly idea is correct, and exposing the recalcitrant to your instruments of torture - long and ill-constructed harangues interspersed with claims that everybody else is moving the goal posts when they complain about you changing the propositon to one that you think you can defend.

None that you can recognise, but you are sufficiently cognitively challanged to have failed to recognise that the 555 became functionally obsolete in the early 1980's.

I usually do, and when I do screw up, as I did earlier in this thread, I admit it.

I only "nay say" nonsensical counter-arguments, of the kind you are particularly prone to produce, and I really don't like getting that kind of attention - not enough to over-come my visceral aversion to nonsense, unfortunately.

Including a 555, whether the client needs it or not

You appear to be abe to find - or have hung onto - rather undemanding clients.

And you think that you are relevant? Another cognitive defect ...

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman
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I appreciate that you can do things with the 555 that Hans R. Camenzind never thought of, but around about 1980 this stopped being a particularly useful skill. You are now in much the same position as people who can chip flint into dazzling flint hand-axes, while the modern tool for doing the job is mass-produced for a tiny fraction of the cost.

Lacking that particular skill doesn't disqualify me from being a circuit designer, any more that your not knowing how to lay out a printed circuit board to fully exploit the capabilites of ON- Semiconductors ECLinPS logic disquallifies you.

.

Or so you'd like to think.

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But if you can solve a problem with the 555, you certainly aren't going to spend any time looking fora better solution.

It isn't actually pabulum - if it was you would be able to follow it and take advantage of it - but this is sci.electronics.design, not sci.electronics.basics and it would be inappropriate for me to dumb- down my postings to a level that you could appreciate. It's hard to do when I'm responding to your ramblings, and I frequently over-estimate your capabilities, as I did in the last sentence of the post you were responding to.

You seem to have missed the implicit insult. You aren't equipped to appreciate that quite a few of my posts are actually perceived as useful, any more than you are equipped to appreciate that most of yours are perceived as deluded irrelevance, as in telling Tim Wescott that he ought to develop a half-baked absolute encoder, when he can't afford to accomodate an off-the-shelf asolute encoder.

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman

You miss too much - as here - to really be in a position to comment.

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman

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It's a unique and very general architecture for this sort of thing, idiot. I've sold 20 to people who know it doesn't exist, but trust me to ship them in February. And I'm only swiping three sheets of 19, the ARM-FPGA-VME interface hardware.

Tell us about your experience doing "that kind of stuff."

John

Reply to
John Larkin

Sounds like the time we spent a couple hours analyzing the electronics of a big disk drive, before we figured out that it wasn't spinning.

John

Reply to
John Larkin

A new world order is on its way, and you're not included in this forth density. Thank god..

Mean while, the rest of us will do what is most practical and actual get something done, instead of flapping at the jaws, relaying the imaginary dreams of bill Slug-Man to the world via internet there by corruption of the sane and sensible people of this planet.

Watch out Bill, they're watching you! "Flaming socialist running with his trousers on fire".

Your half baked ideas of the inability of some components is just that, half baked. It only shows that you belong with those of quantum physics, a science designed for those that don't know shit about how something really works.

Jamie

Reply to
Jamie

Stop feeding the troll. If everyone did, we'd never have to endure any of this crap. ...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
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I love to cook with wine.     Sometimes I even put it in the food.
Reply to
Jim Thompson

I was just about to say the same for you.

Jamie

Reply to
Jamie

Drivel and IKYABWAIs hardly worth wasting time to argue about.

--
JF
Reply to
John Fields

Drivel and IKYABWAIs hardly worth addressing.

--
JF
Reply to
John Fields

May the forth be with you?

Bwuahahahaha!

Whodathunk that Jamie would unify the fields?

Post the formula for your GUTOE!

Reply to
My Name Is Tzu How Do You Do

Just more twaddle...

--
JF
Reply to
John Fields

Well, he's got this cool idea to build an oscillator, someday.

Reply to
krw

Yes. I haven't been clear.

Let's begin a new thread. This one is contaminated by spam to an extent that makes it too difficult to read. I'll call it "incremental encoder centration".

Jerry

--
Engineering is the art of making what you want from things you can get.
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Reply to
Jerry Avins

The centration error will affect any of the basic methods described by making the angular resolution (or error, however you want to look at it) worse on the side with the greatest distance from the shaft center. Basically, the angular resolution isn't uniform across the period of the shaft rotation.

I thought one of the methods mentioned earlier was pretty cool, in that the code marks are triangles (and potentially opposing triangles), which makes the runout detectable by affecting the duty cycle of the marks. That could be used to automatically compensate for the centration errors, when using Tim's method or almost any of the methods mentioned.

Eric Jacobsen Anchor Hill Communications

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Reply to
Eric Jacobsen

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Most recently - 1998 - was the programmable pulse generator for the electron spin resonance spectrometer that never got built, which ended up with nearly 200 pages of A4 in the heirachial schematic of the board that carried the SRAM memory, the conventional logic that oragnised the data into into 96-bit wide words,and the - mainly - ECLinPS that turned this into 24-bit coded intervals with a maximum length of 262 microseconds and a resolution of some 20psec.

Lots of those pages were cut and pasted, but I did have to go through the copied pages getting the bus-names right, which was a bit tedious. Orcad was introducing a new schematic capture and layout tool at the time, and the university had bought it.

In gEDA I could have used awk to edit the bus-names directly in the files, but Orad encoded its data.

What was really tedious was using a CMOS counter for the top five bits of the synchronous counter. Under any rational accounting system the cost of one more MC100E016 in a one off design wouldn't have covered the time I took putting in a 74HCT40103, but the customer didn't have to pay for my time, but he did have to pay for the cost of the parts. It was fun getting it to work, but I really shouldn't have done it.

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman

It's going to take him much longer to comprehend what you're talking about let alone, offer a better alternative. It'll be full of back paddling excuses in hopes that some one a lot smarter than him, (most are here) will enlighten him with an idea that he can remodel and put his stamp on it.

His response would/will be full of volcabulistic anarchy, designed to confuse the common person that is accustom to just getting it done, in hopes that he makes an impression.

The days of attending college and learning how to manipulate his peers in the real world to gain knowledge off the backs of others and take credit for it, are quickly coming to an end.

Yes, we all know these types.. They learn how to write papers at those socialist collages, because that's all the system can effort, and get shoulder educated from real knowledgeable engineers after school, with hopes he can bull shit them the rest of the way.

Jamie

Reply to
Jamie

Funny. Your delusions about quadrature decoders would seem to be inconsistent with you ever having done an angle encoder, but you claim to be an expert on the subject with loads of hands-on experience. Presumably it is all as imaginary as your dog.

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman

But you keep on posting drivel anyway.

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman

t

That fits on one LTSpice A4 page. The real circuit will be split across a couple of pages when I get around to doing a detailed circuit diagram with gEDA, and probably a layout with PCB, but it's not a particularly complicated circuit.

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman

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