Singularity

Started by mowens, April 13, 2021, 11:54 AM

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mowens

It turns out that the reason we had the violent crash I posted about earlier is because we were approaching a singularity.  We were running with B axis at around 90 degrees. This put A axis and C axis almost parallel. If they had been parallel it would have created a singularity, a motion calculation with an infinite number of solutions. As it approached that condition it caused the machine to find "crazy values" per the machine builder. We have now been instructed to not run B at over 80 degrees.

I have only heard of singularity issues with robots but I guess it can happen with a 7 axis gantry as well.
"I would gladly risk feeling bad at times if it also meant that I could taste my dessert." - Data

Tim Johnson

#1
Is this the first time a singularity type issue has happened on this brand of machine?
FJB

Incogneeto

#2
I'm Single......I Guess anything is possible.

And believe me My A axis is perfectly in Line with My C.

Incogneeto

#3
When I wake up in the morning I could pee over the top of the tank.....No Hands

byte

#4
Quote from: Incogneeto post_id=9531 time=1618346171 user_id=72When I wake up in the morning I could pee over the top of the tank.....No Hands


Do you deburr at the same time?

Asking for a friend.

Incogneeto

#5
On a serious note poor Kid at work was probing and Hit the turret change Button.

Haas showed up replaced the arm.(Thanks Tyler)
2 days later he drove the 35 degree finish tool through his part and the Tailstock center on the other machine.

I heard it of course. and went to check. "You Ok?" Yep I forgot my X.

I smiled at him and Said. "I Know a Guy who just blew up a super expensive Machine"

"This ain't that Bad we'll call Tyler"

35 degree holder and replacement center......$700

Bet money it pales in comparison.

Incogneeto

#6
[quote="Thee Byte™" post_id=9535 time=1618346666 user_id=50]
Quote from: Incogneeto post_id=9531 time=1618346171 user_id=72When I wake up in the morning I could pee over the top of the tank.....No Hands


Do you deburr at the same time?

Asking for a friend.
[/quote]


"It Takes Two Hands to Handle a Whopper"

Incogneeto

#7
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Dan_AKA_ROY23

#8
Ah. OK. Odd, Mike. (I don't know multiple axis stuff)

Thought this was (Point of) Singularity.

Like, the universe's "point of singularity" existed a long time ago.

^^^ Wrong. There was no reference of time...

Wow, that point of singularity was small. Musta been in the 'center' of the universe before it "exploded"!

^^^ Wrong again. There were no spacial dimensions (ht, lg, width). No time. Nor,.... location. And it imploded first before exploding.

Dan_AKA_ROY23

#9
^^^ So, a point has one dimension. It has location (x,y,z coordinates). So my "no location" is technically incorrect. Yes? Matthew?

Matthew Hajicek

#10
Quote from: Dan_AKA_ROY23 post_id=9547 time=1618348082 user_id=82^^^ So, a point has one dimension. It has location (x,y,z coordinates). So my "no location" is technically incorrect. Yes? Matthew?


A point has zero spatial dimensions.

A black hole is a spatial singularity.  A singularity can also be a situation in which a very small input yields a great change in output, or where the rate of change is exponential.  See: "technological singularity".

If the big bang theory is correct, then at the very moment of the beginning of the universe, the entire universe was a spatial singularity, and it was not in space, the space was also a singularity.  So no, it would not have had a location, the concept would have been meaningless.  The tiniest fraction of a microsecond later however, and space expanded, had a distribution of mass and energy throughout, and the concept of "location" began to have meaning.  The hardest part to imagine, by my understanding, is that this expanding universe was still infinite, though expanding rapidly.  It's like your Mastercam graphics window if your computer could handle dimensions of infinite size; you start zoomed to fit on the entire infinite universe, and the whole thing is a single pixel dot.  Then you start zooming in (space is expanding) and it extends forever in all dimensions, and you keep zooming in.  Or perhaps it may be easier to imagine as a scaling factor, starting at zero and applied to an infinite universe.

BTW I've called my new company Singularity Precision Machine.

Matthew Hajicek

#11
Quote from: Dan_AKA_ROY23 post_id=9546 time=1618347924 user_id=82^^^ Wrong. There was no reference of time...


That would apply to "before" the big bang, which, according to the theory, would be like saying "outside the universe", being nonsensical.  There are variant theories however, some of which hold that there have been an infinite number of big bangs stretching back through eternity.  Each universe lives, dies, fades out as its particles decay into nothingness, and then some near-eternity later a new one comes into existence.  Like raindrops on the fabric of space-time.

Incogneeto

#12
[quote="Matthew Hajicek" post_id=9552 time=1618352755 user_id=57]
Quote from: Dan_AKA_ROY23 post_id=9546 time=1618347924 user_id=82^^^ Wrong. There was no reference of time...


That would apply to "before" the big bang, which, according to the theory, would be like saying "outside the universe", being nonsensical.  There are variant theories however, some of which hold that there have been an infinite number of big bangs stretching back through eternity.  Each universe lives, dies, fades out as its particles decay into nothingness, and then some near-eternity later a new one comes into existence.  Like raindrops on the fabric of space-time.
[/quote]


And God Said "Let there Be Light"

Simpler and much less exhaustive.

I have much more faith in that Theory.

mowens

#13
[quote="Tim Johnson" post_id=9529 time=1618345987 user_id=68]
Is this the first time a singularity type issue has happened on this brand of machine?
[/quote]


The machine manufacturer says it's a well known issue but it's the first time I've run into it.
"I would gladly risk feeling bad at times if it also meant that I could taste my dessert." - Data

mowens

#14
QuoteI smiled at him and Said. "I Know a Guy who just blew up a super expensive Machine"


Glad I could cheer him up!

Yes this machine was somewhere around 8 to 10 million when it was installed in 2009.
"I would gladly risk feeling bad at times if it also meant that I could taste my dessert." - Data