RE: [CAD_CAM_EDM_DRO] nema 34 motors on BP series 1 conversion

I still think you're misunderstanding this, Ron.

Torque is measured in distance times force. The further out you go along the
radius(the longer the "lever"), the less force you will need to generate an
equivalent torque.

The "slash" means a division is taking place, and is used in things like
ft/s (feet per second).

The importance of the terminology is that when you use these terms, and
enter them into equations to calculate other parameters, the units are
multiplied and divided along with the numbers that are associated with them.

So, for instance, ft/s per second is also "feet-per-second-squared"(I can't
show it in ASCII), but it means "s squared" under the slash, under the feet.

And what I am saying is that if the incorrect symbols are used, it is easier
for people who don't know that it's wrong to learn the wrong thing, and also
to have a basic misunderstanding of what is going on.

Andy Wander
Verrex Corporation


-----Original Message-----
From: R Rogers [mailto:rogersmach@...]
Sent: Friday, September 24, 2004 4:16 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: RE: [CAD_CAM_EDM_DRO] nema 34 motors on BP series 1
conversion

I said moment, not movement. Its force applied to the diameter. The force
being 1 ounce and the radius being 1" Its 1 ounce force PER 1 inch radius
imposed on the axis. Or 1oz/in...lol If we used bananas for weight and
force in the same configuration it would be 1 ba/in. Sorry, I'm in one of
those moods today. Its irrelevant what symbols are used as long as its
understood. I don't see how putting a slash between the force and moment
could be misconstrued.

Ron
Andy Wander <awander@...> wrote:
Well, actually, no.

It is lb*in or oz*in.

That's a multiplication, not a division.

Think of it this way-a shaft needs a certain amount of torque to turn it. I
can apply 1lb at a 2 inch radius, or 2lb at a 1 inch radius. I get 2 lb-in
either way.

The "distance" is not the amount of movement, but the distance from the
center of rotation.

Hope this helps,

Andy Wander
Verrex Corporation


-----Original Message-----
From: R Rogers [mailto:rogersmach@...]
Sent: Friday, September 24, 2004 3:42 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: RE: [CAD_CAM_EDM_DRO] nema 34 motors on BP series 1
conversion

Well if you want to get technical it really is lb/in and oz/in. Rotational
torque is rated in this manner. A 2" disc mounted upon a horizontal shaft
and a 1 ounce weight suspend ed from its outer diameter at a horizontal
plane from the axis would constitute 1 ounce of force PER 1" of moment, 1"
moment being the radius. Or 1 oz/in.

Ron


Andy Wander wrote:
Thank you......

I wouldn't care so much if it were not for the possibility that people will
try to use the units quoted in an equation, with the result that they will
be more convinced than ever that this is all black magic.

Andy Wander


-----Original Message-----
From: R Rogers [mailto:rogersmach@...]
Sent: Friday, September 24, 2004 2:52 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: RE: [CAD_CAM_EDM_DRO] nema 34 motors on BP series 1
conversion

lb-in...is that better? lol

Andy Wander wrote:It's lb-in or in-lb or lb*in or
in*lb(pronounced "inch pounds" or "pound
inches"), NOT lb/in(pounds per inch) or in/lb(inches per pound).

Whew! I feel better now.....

Andy Wander
Verrex Corporation