From Newsgroup: rec.crafts.metalworking
On 8/17/2025 9:42 AM, Jim Wilkins wrote:
"ABLE1"-a wrote in message news:UuloQ.18286$S8Ne.4273@fx45.iad...
On 8/16/2025 4:55 PM, Bob La Londe wrote:
WHAT THE HECK IS GOING ON HERE? It looks like the two streams are
bouncing off of each other.
https://rumble.com/v6xod8s-whats-the-heck-is-going-on-here.html?
mref=1sqt4y&mc=42lue>
Answer:
There are two(2) things going on!!
!) Bob only typed two sentences on this posting!!
2) Magic!!
That is all I have!!-a :-)
Les
--------------------------------
Cameras don't have binocular (stereoscopic) depth perception, the two streams may pass without touching. Lack of depth perception is the
reason the movie / TV stunt of punching someone in the jaw works, the
victim reacts when the fist passes in front of them.
Close one eye and try touching things from the side with a finger. Your
one open eye gives you an answer that may be wrong.
https://en.wikipedia.org/wiki/Depth_perception
Its not a trick. At least not that kind of trick. There are in fact
two laminar streams impacting and deflecting from each other. Two cues
in the video support this. (1) There is a visible interface line
between the streams. (2) Periodically a perturbation or disturbance of
some kind cause the two stream to converge for a fraction of a second.
It is what it looks like. Two laminar flowing streams making contact
and deflecting from each other.
I suppose I could have recorded a longer video (drained about 2 gallons
this way), but I thought everything necessary to at least know what is happening if not the cause was available in the 9 second video, and
making a longer video would have seemed like useless auto flagellation.
This fluid started out as a mix of distilled water and about 5% SC520
cutting fluid. The tank has not been cleaned in a couple years. I
know. My bad. #2 way oil has been oozing out of the machine every 15
minutes when the automatic oil is activated to lubricate the cast iron
ways and ball screws. I suspect it is more way oil than water, but I
have kept the tank topped off with water and cutting fluid. I haven't
worried to much about it since I have ONLY use this particular machine
for engraving for the last several years.
Jim, I am disappointed. In spite of your tendency to start off with a
new topic at some point temporally displaced from the tangent point in
some of your unrelated replies to topics, I figured this one would be
right up your 7-10 split.
One person (in a forum) said with authoritarian demeanor that, "This is
a non Newtonian fluid." I neither agree nor disagree. I just don't
know. It was an interesting anomalous visible occurrence I found
interesting enough to waste 9 seconds recording video, and an
indeterminate number of additional seconds sharing the video with others.
While it was happening I cut 3 molds that will be shipping to Hawaii.
The day before I spent most of the afternoon cleaning out two machines
and adding a coolant tap for a wash down hose. I'll finish cleaning out
this machine, and add a tap for a coolant hose to it today and tomorrow.
I'm also going to do an experiment with a dual tank design, that
should isolate fines and floating oil to the first tank. If I like how
it works I may change all/most of my machines to a dual tank design.
Now I am off to 3D model some fish hooks. Yeah really.
If I have time later today I'll make a one piece bulkhead connector for joining the two tanks. Well, one piece body. It will still have two
nuts and two gaskets as well. Well either that or go fishing.
--
Bob La Londe
CNC Molds N Stuff
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