John B. Slocomb on Mon, 03 Sep 2018 09:12:11
+0700 typed in rec.crafts.metalworking the following:
On Sun, 02 Sep 2018 18:43:38 -0700, pyotr filipivich
wrote:

"Jim Wilkins" on Sun, 2 Sep 2018 21:06:01 -0400
typed in rec.crafts.metalworking the following:
"pyotr filipivich" wrote in message
news
I may have asked this before, but I have A Project in mind. This
is much simpler than the last time, when I wanted to build 4
humanoid
robots to pick up a shipping container at the corners and move it.
"Hup, hup, hup, ... detail halt!"

What I want to do this time is to just "slide an I-beam under the
outbuilding, attach a wheeled unit to each end, pivot the building
and
roll it to when I want it." No doubt "A simple procedure involving
lasers." I'm sure. Somewhere.

But, my question is: load capacity of the units. Assume a GW of 3
tons, does that meant that each wheeled unit has to be able to
'carry'
a three ton load, or can I divide the gross weight by 4, add a
"fudge
factor" and hope for the best?

This is one of those things I'd talk to one of the old guys, but I
find I am one of the old guys.


tschus
pyotr

You need to be clearer about the "wheeled unit".

Your one I-beam and four wheels only makes sense to me if you rig it
like a tandem axle trailer. If the two(?) wheels on a side are on a
pivoting bar that lets them adjust to uneven ground then they share
the load, if their axles are rigidly attached to the I-beam then they
don't.


Can you guys not answer the question I didn't ask? Grumble,
grumble; kids these days. Just like when I was a boy.
Reevaluating, I'm going to be working with nanobots which will
interlace sort of like legos or ants. So what I want to know, if each
nanobot can lift a gram, do I need the swarm at one corner to be able
to hoist 3,000,000 grams, or can they just lift a quarter of that? I
don't want to have to turn out more than I need is why I'm asking.

tschus
pyotr
--
pyotr filipivich
"With Age comes Wisdom. Although far too often, Age travels alone."


If your nonobots can be sure that the lift keeps the object perfectly
level, and the CG of the object is exactly in the center, vertically,
then each corner will require 1/4 of the total weight to be lifted.

Thanks

--
pyotr filipivich
"With Age comes Wisdom. Although far too often, Age travels alone."