woodworking: layout & measuring
DESCRIPTION
WOODWORKING: LAYOUT & MEASURING. Historical Measurement. Measurement started with items common to man such as a hand length, an arms length, the length of a foot or many other common items. These proved to be inadequate. Steel Rule. Is a metal ruler Used for accurate measurements - PowerPoint PPT PresentationTRANSCRIPT
WOODWORKING: LAYOUT & MEASURING
Historical Measurement Measurement
started with items common to man such as a hand length, an arms length, the length of a foot or many other common items. These proved to be inadequate.
Steel Rule Is a metal ruler Used for accurate
measurements Can be used as
guides for laying out lines
Rigid steel rules can be used when cutting straight lines.
Try Square A straight edge ruler
and a beam or stock piece that are joined together at a 90˚ angle
Used for• layout lines perpendicular
to an edge/side• Check that a board is
square• Check a board’s flatness
If a try square is dropped it may become inaccurate (not square.
Combination Square Consists of:
• Blade – steel rule• Square head• Center head• Protractor head
Used like a try square Layout angles Find the center of
round stock (center head)
Measure the depth of a hole
Carpenters Square Used to
• measure boards• Testing corners• Laying out various
angles 2 measuring blades
are set at 90˚ This tool can be
inaccurate if dropped…but can be reset.
Sliding T-Bevel The blade on the T-Bevel
is movable It can be set at any
angle between 0˚ and 180˚
The locking screw secures the blade in place.
You can use various other tools to set the angle and then test your pieces to see if the angle matches.
Trammel Points Accurately measure
and mark long distances
Transfer arcs and circles
Compass Tools used to draw
arcs and circles One point stays
stationary (point), while the other end draws the arc (pencil)
French Curve Used to smooth
arcs or making the transition from an arc to a straight line
Layout curves and other designs
Measuring Tape A flexible form of a
ruler (metal strip) Self-retracting
coiled measuring tool
Tip moves slightly to allow for accurate inside or outside measurements
Chalk Line Allows you to draw
a straight line over a long distance.
String and chalk is contained in the body of the tool
You pull the line tight and snap it. The result is a chalk line.
Your Task… Find an uncommon
tool used in the woodworking shop.
Create 2 posters for the tool:1. Create a fake
name and use for the tool
2. Indicate the real name and use for the tool.