Z values

What are 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 (e.g. GL, AB, TL),
  • numerical values and mathematical functions can be used.
A case differentiation can be entered for z values with up to two conditions. Use the input assistant.

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

Entering and altering z values

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Entering and altering z values is started with the function key <F11>, via Control bar → z values or via Extras → Z Values. ...

Pressing the <F11> key opens the z value entry window (Picture 1). The z value with its calculation formula is entered into the formula column and a corresponding comment is entered into the text column. Longer comments can be entered into the large edit window below the z values.

The calculated result for the style size appears in the value column. 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 the z value is redetermined.

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Switching to long format also displays the values for the other sizes in the size list . The display can be switched from normal view to difference to the 1st size or relative difference . The order of sizes can be arranged according to the order in the size list or according to standard sizes (Picture 2).

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 record 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 the z 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 significance. 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).
  • Mathematical expressions with correct syntax are accepted only.
  • 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!
+ for addition
- for subtraction
* for multiplication
/ for division
# for exponent
g6
g values, g6=sixth value of the current measurement 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 Interactive Interface - Adjust interactive construction), xg5=fifth value of the x value table of all parts of the style
z4 z value z4
numbers numbers, e.g. 12; -12.0; 23.6, with the point as decimal point
pi the constant pi (=3.1415927)
cos
for cosine
sin
for sine
tan
for tangent
atn for arc-tangent
sqr for square root
btr for absolute value
rnd for rounding
gL

full length of a clicked line
Ab

distance between two points
TL

partial length of a line
Ri direction of a line in the ‘click point’
WS angle at intersection point of two lines
WP angle defined by three points
Ax horizontal distance
Ay vertical distance
xK x co-ordinate value of a point
yK y co-ordinate value of a point

For the process data gL, Ri and WS existing lines of the construction are to be clicked. Other process data is determined with the point construction sub-menu.

Input assistant

The input assistant facilitates the entry of calculation instructions for the z value. To open the input assistant, click on the button in the upper part of the dialogue (Picture 2).

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The process data can be selected via the buttons. In the Formula element area, all other permitted operands such as mathematical functions, g values of the measurement chart, x values of the part, global x values or z values of the part can be selected. The selection is automatically transferred to the z value formula (Picture 3).

z1= 12.3-124.3+100-33-.123

  

z2=123.4-pi+gL+sin(Ri-Ri)

  

z3=(gL+gL)*1.05+g1/100

  

Z4=z1+x12-g2/3.5+Ab

  

z5=sqr((xK-xK)#2+(yK-yK)#2)

 theorem of Pythagoras

z6=atn(z1/z3)

  

Insert z values

z values can be inserted before or after an existing z value. Click on to insert a z value before a selected z value and click on to insert a z value after the selected z value.