11.2 The X value reference

With the x value reference function measurement charts/ sizes in the size list are assigned with x values of other measurement charts/ sizes.

The x value reference is usually used to assign the x values of a standard measurement chart to an individual measurement chart.

W hen entering an individual measurement chart into the size table the x value reference is assigned by default with the standard size on which the individual measurement chart is based. If no x value reference is entered the standard value applies to individual measurement charts. Entering, editing and deleting the x value reference ensues analogous to editing the measurement chart column.

Picture 11-1

Self assessment questions

1. What purpose of using x values in a construction?

2. What is the feature of the global x values?

3. What is the feature of the x values of the basic blocks?

4. What is the feature of the x values of the construction record?

5. How to work with x values?

Reference:

©Friedrich: Grafis – Textbook Part 1, Edition 2008, Chapter 11, 2-9p.p.

Lecture 12

The construction parameters g and z values.

12.1 The g values

12.2 The z values

12.1 The g values

g values are the size values of the current measurement system which are logged in the well-known measurement charts. g1 defines the first value of the current measurement chart, g2 the second value and so on. In the measurement system Optimass for example g1 is the bust and g3 the height. The measurement charts can be edited, viewed and/or printed via Extras | Measurement Charts....

Always consider the selected measurement system when working with g values!

g values are applied in the same way as x values. In conjunction with the z values - which will follow - they allow for drafting basic blocks on screen.

The step-by-step guide for measurement system Optimass is as follows:

p+l+c+r below p+w+h:

w=g4 type and <ENTER>

h=g3 type and <ENTER>

p+w+h click

p on x&y with x=y=0 measure

Check the result by measuring.

12.2 The z values

z values are calculated construction parameters. For the calculation of z values

• all defined construction parameters (x, xg and g values),

• previously defined z values,

• measurements from the construction, so-called process data,

• numerical and mathematical functions can be used.

Defined z values are applied in the same way as x values.

Entering and altering z values

Entering and altering z values is started with the function key <F11> or via Extras | Z Values. With few exceptions this is possible in all menus after test run or a record function.

Pressing the <F11> key opens the z value entry window (Picture 12-5). The z values with corresponding comment are entered into the List of Z Values dialogue field.

In the lower part of the window you can find the list of available z values with their calculation formula, the calculated result in the base size and the comment. Having selected the z value, an existing z value can be re-assigned. After correction of the selected z value, the construction record runs to the saved record step and re-determines the z value.

In addition, the z value list can be printed or copied to the clipboard. The z value list displays the record step during which the z value was entered. A z value can only be deleted if it is no longer required for a correct record run.

When resetting the Grafis re-cord the z values which are part of the record step are also reset. Use z values also for displaying warnings!

For example, if a distance may never be smaller than 100mm, generate a z value z..=Ab, enter the value 100 in the min field and measure the distance after having pressed <ENTER>. In case the value is actually smaller, a warning appears "Warning: value fallen below minimum z..=Ab". Ensure a suitable comment for a value!

Syntax (spelling) of the z value entry

• Each instruction is to begin with z1= or z20=. It is recommended to enter the z values in the given ascending order.

• Small and capital letters have the same signifi-cance. Spaces are ignored.

• The calculation of expressions in brackets is possible.

• Angles are to be entered in degrees (e.g.: sin(45) for the sine of 45 degrees).

• Grafis reports errors in mathematical expressions. They are marked with a small arrow below the position of the incorrect syntax.

• Defined x and g values, mathematical functions and process data can be used to calculate z values (see examples). Processing previously defined z values is also possible.

The calculation of z values is recorded. Resetting the record resets the z values also!

Permitted operators

• for addition

- for subtraction

* for multiplication

/ for division

• for exponent

Permitted operands

g6	g values
	g6=sixth value of the current meas-
	urement chart
x3	x values
	x3=third value of the x value table
	(active part) of the current part
xg5	x values of all parts (see chapter 11)
	xg5=fifth value of the x value table of all
	parts of the style
z4	z value z4
number	numbers, e.g. 12; -12.0; 23.6, with the
	point as decimal point
pi	the constant pi (=3.1415927)

Functions permitted as operands cos for cosine

sin for sine

tan for tangent

atn for arc-tangent

sqr for square root

btr for absolute value

Process data permitted as operands

gL	full length of a clicked line
Ri	direction of a line in the “click point”
xK	x co-ordinate value of a point
yK	y co-ordinate value of a point
Ab	distance between two points

Self assessment questions

1. What data can be used for z values?

2. How to enter and alter z values?

3. How to use z values for displaying warnings?

4. What syntax rules shoud be applied when z values set up?

Reference:

©Friedrich: Grafis – Textbook Part 1, Edition 2008, Chapter 12, 2-6p.p.

Lecture 13