A screw axis (helical axis or twist axis) is a line that is simultaneously the axis of rotation and the line along which translation of a body occurs. Chasles' theorem shows that each Euclidean displacement in three-dimensional space has a screw axis, and the displacement can be decomposed into a rotation about and a slide along this screw axis. Plücker coordinates are used to locate a screw axis in space, and consist of a pair of three-dimensional vectors. The first vector identifies the direction of the axis, and the second locates its position. The special case when the first vector is zero is interpreted as a pure translation in the direction of the second vector. A screw axis is associated with each pair of vectors in the algebra of screws, also known as screw theory. The spatial movement of a body can be represented by a continuous set of displacements. Because each of these displacements has a screw axis, the movement has an associated ruled surface known as a screw surface. This surface is not the same as the axode, which is traced by the instantaneous screw axes of the movement of a body. The instantaneous screw axis, or 'instantaneous helical axis' (IHA), is the axis of the helicoidal field generated by the velocities of every point in a moving body. When a spatial displacement specializes to a planar displacement, the screw axis becomes the displacement pole, and the instantaneous screw axis becomes the velocity pole, or instantaneous center of rotation, also called an instant center. The term centro is also used for a velocity pole, and the locus of these points for a planar movement is called a centrode. (Wikipedia).
Spherical 6-bar linkage mechanism
Axes of all revolution joints intersect at a common point.
From playlist Mechanisms
Input: grey pulley having tilted hole to create revolution joint (rolling bearing in pactice) with orange nut. Output: green screw of lead t1. Nut has two internal circular rings that roll on the screw. In 1 input rev. the screw moves t1.
From playlist Mechanisms
Fixed Swashplate Rotating Barrel
http://www.mekanizmalar.com/fixed_swashplate_rotating_barrel.html An axial piston pump has a number of pistons (usually an odd number) arranged in a circular array within a housing which is commonly referred to as a cylinder block, rotor or barrel. This cylinder block is driven to rotate
From playlist Pneumatic and Hydraulics
Introduction to Cylindrical Coordinates
This video introduces cylindrical coordinates and shows how to convert between cylindrical coordinates and rectangular coordinates. http://mathispower4u.yolasite.com/
From playlist Quadric, Surfaces, Cylindrical Coordinates and Spherical Coordinates
Levitate a Screwdriver with Compressed Air!!!
The video shows screwdrivers in the air flow generated by pressurized air using a conventional industrial air gun. We have a high pressure area on the side of the screwdriver, and a low pressure area where flow accelerates over the rounded top of the handle. The screwdriver floats when th
From playlist MECHANICS
Identify the type of angle from a figure acute, right, obtuse, straight ex 1
👉 Learn how to define and classify different angles based on their characteristics and relationships are given a diagram. The different types of angles that we will discuss will be acute, obtuse, right, adjacent, vertical, supplementary, complementary, and linear pair. The relationships
From playlist Angle Relationships
CCSS What is the difference between Acute, Obtuse, Right and Straight Angles
👉 Learn how to define angle relationships. Knowledge of the relationships between angles can help in determining the value of a given angle. The various angle relationships include: vertical angles, adjacent angles, complementary angles, supplementary angles, linear pairs, etc. Vertical a
From playlist Angle Relationships
Determining acute vertical angles
👉 Learn how to define and classify different angles based on their characteristics and relationships are given a diagram. The different types of angles that we will discuss will be acute, obtuse, right, adjacent, vertical, supplementary, complementary, and linear pair. The relationships
From playlist Angle Relationships From a Figure
Each gear (screw) has only one tooth. Gear face width must be larger than tooth axial pitch. Inventor files of this video: http://www.mediafire.com/file/xnv77haegfn9mbu/SpurGear1cInv.zip/file
From playlist Mechanisms
MIT 3.60 | Lec 14b: Symmetry, Structure, Tensor Properties of Materials
Part 2: Final Lecture on Symmetry: 3D Space Groups View the complete course at: http://ocw.mit.edu/3-60F05 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 3.60 Symmetry, Structure & Tensor Properties of Material
Mod-01 Lec-3 Symmetry in Perfect Solids (Continued)
Condensed Matter Physics by Prof. G. Rangarajan, Department of Physics, IIT Madras. For more details on NPTEL visit http://nptel.iitm.ac.in
From playlist NPTEL: Condensed Matter Physics - CosmoLearning.com Physics Course
Win some / lose some. Still needs some work, but here's my start on a 4th axis.. you might like following along.
From playlist All Uploads
MIT 3.60 | Lec 15a: Symmetry, Structure, Tensor Properties of Materials
Part 1: Space Group Notation and Tensors View the complete course at: http://ocw.mit.edu/3-60F05 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 3.60 Symmetry, Structure & Tensor Properties of Material
Fixed Gantry CNC Router Build Part 3
Last installment of the CNC router build. Anyone interested in just the rubber band rifle.. starts at 26:00. ThisOldRouter CAD: https://drive.google.com/file/d/0BziGqMVEh_qrdlBGTmRKcThVRDg/view?usp=sharing Royalty-Free Music from YouTube's Creation Tools. "The Engagement" by Silent Part
From playlist All Uploads
Fixed Gantry CNC Router Build Part 2
Part 2 (of 3!) of the CNC router build. Hit a snag with the table that's set me back a bit. CAD is coming once I get the table figured out and the model updated. Enjoy!
From playlist All Uploads
Tested Builds: $540 3D Printer, Part 3
This video was brought to you by Tested Premium Members. Learn more about how you can support videos like this at http://www.tested.com/membership In part three of our PrintrBot Simple 3D printer build, we reach a few steps that are deceptively complex. We also use this time to review the
From playlist Tested Builds
Fixed Gantry CNC Router Build Part 1
Just like the title says, Part 1 (of 2?) of my Fixed Gantry CNC Router. Part 1 shows the basic building blocks coming together through to the frame construction. "Life of Riley" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.
From playlist All Uploads
Tested Builds: $540 3D Printer, Part 2
This video was brought to you by Tested Premium Members. Learn more about how you can support videos like this at http://www.tested.com/membership The build of the PrintrBot Simple Metal 3D printer continues! In this second episode, Will and Norm wade through photo-instructions for this l
From playlist Tested Builds
The Creality CR-10 Mini 3D Printer: Unboxing, Assembly, and Review
This video focuses on the Creality CR-10 Mini 3D printer. We will unbox the printer, show how to set it up, discuss a workflow to generate your own 3D prints, and give our impressions/review of the printer. Topics and Timestamps: 0:00 – Unboxing 7:30 – Exploring the contents of the print
From playlist Reviews and Unboxings
Physics, Torque (2 of 13) Force at Right Angle to Object
This video shows you how to calculate the torque produced by a force applied at a right angle to an object. Torque is a rotating force. It is a measure of how much force is acting on an object that causes the object to rotate. The object will rotate about an axis, which is called the pivo
From playlist Torque and Static Equilibrium