Acu-Rite Control System MILLPWRG2 User Manual

							ACU-RITE MILLPWRG2 211
9.1 Geometry Calculator
Geometry calculator layout
The geometry calculator’s layout is similar to the part program in PGM 
mode. To differentiate it from the part program, the geometry step 
listing is on the right third of the screen and the graphic window is on 
the left two-thirds of the screen.
Geometry listing
The geometry calculator listing contains all steps:
Limited to geometry steps: point, line, and arc.
No continuity indicator. Margin is used to display step number for 
reference only, and has no incremental references. Use the ARROW 
keys for step selection.
To create a new Geo step, press the POINT, LINE, or ARC key.
To edit an existing Geo step, cursor to the step and press ENTER or 
USE.
To delete an existing Geo step, cursor to the step and press CLEAR.
Goto step number is supported.
Geometry graphic
The graphics window provides visual feedback:
Limited to 2D Line view.
Extents determined by the size of the entered steps and calculated 
results.
The block size matches the extents plus the normal margin. The 
datum symbol is displayed at (0,0). A ruler is also shown.
Highlight features:
Focus feature – Blue
Selected features – White
New features – Green
Normal features – Yellow
A GeoPoint is displayed as a crosshair (×). 
						

							2129 Geometry/RPM Calculator
9.2 Geometry User Interface
9.2  Geometry User Interface
Adding geometry features to listing
Geometry steps are limited to GeoPoints, GeoLines, and GeoArcs. A 
new step is added by pressing the POINT, LINE, or ARC key. As with a 
part program, the new step is added before the currently highlighted 
geo step
GeoPoint
Defined by single coordinate
GeoLine
Defined by combinations of From point, To point, and Angle.
GeoArc
Defined by combinations of From point, To point, Center point, 3rd 
point, Radius, Direction, and Sweep Angle. From and To points are 
optional (calculated at 12:00 position), otherwise, combinations 
follow programmed arcs.
Finding geometry solutions
Geo steps may also be created by finding points, lines, or arcs related 
to other Geo steps. These steps are created by selecting one or two  
steps and pressing the Find Point, Find Line, or Find Arc soft key.
To select or deselect a step:
Cursor to the step in the listing and press the Select Feature soft 
key to select it (soft key will display as being pressed).
To deselect a step, highlight the selected step, and press the Select 
Feature soft key again to release unselect the step.
No more than two features may be selected at a time. Selecting a 
third feature will deselect the oldest selection. 
						

							ACU-RITE MILLPWRG2 213
9.2 Geometry User Interface
The following table lists the features that are found based on the 
selected features:
ItemsFind PointFind lineFind Arc
1 Line End points of the given line Given a distance, lines parallel to 
the given line; lines perpendicular 
to the given line through its end 
points.
1 Arc Center point, end points. Given an angle, all lines tangent to 
and through the center point of the 
arc.
If angle is not specified, gives lines 
from the end points to the center 
point.Complimentary arc.
2 Points Midpoint between the given 
points.Line  between  the  given  points Given a radius, all arcs through the 
given points.
If radius is not specified, gives you 
two arcs, each tangent to both 
points with the midpoint as its 
center point.
1 Point
1 LinePoint on the given line which, with 
the given point, would form a line 
perpendicular to the given line.Line through the given point, one 
parallel and one perpendicular to 
the given line.Given a radius, all arcs through the 
given point and tangent to a given 
line.
If radius is not specified, gives you 
two arcs, each tangent to the 
given line with the given point as 
its center point.
1 Point
1 ArcPoints which, with the given point, 
would form lines tangent to the 
given arc and the shortest line 
from the given point to the given 
arc.Lines through the given point 
tangent to the given arc, and the 
shortest line through the given 
point to the given arc.Given a radius, all arcs through the 
given point and tangent to the 
given arc.
If radius is not specified, gives you 
all arcs tangent to the given arc 
with the given point as its center 
point.
2 Lines Intersection point of the given 
lines.Line that bisects the angle formed 
where the given lines intersect; 
line perpendicular to the bisector.Given a radius, all arcs tangent to 
both given lines
1 Line
1 ArcPoint where given line intersects 
given arc.Lines perpendicular to the given 
line and tangent to the given arc; 
shortest line to the given arc 
which is perpendicular to the given 
line.Given a radius, all arcs tangent to 
the given line and the given arc.
2  Arcs Intersection  points. Lines tangent to arcs; shortest line 
between arcs.Given a radius, all arcs tangent to 
both arcs. 
						

							2149 Geometry/RPM Calculator
9.2 Geometry User Interface
Some operations require entry of additional information (distance, 
angle, or radius). If needed, the user is prompted to enter a value by 
displaying a dialogue with fields that require additional data.
Managing geometry results
Since there are generally more solutions possible than desired, all 
possible solutions are presented (without a step number). To keep the 
result required, use the UP or DOWN ARROW keys to move the cursor to 
that feature and press the Keep One soft key. 
When the cursor is on an existing feature the following soft keys are 
available:
When the cursor is on a feature that is not saved, the following soft 
keys are available:
After selecting the features to be retained, press the Clear Results 
soft key to remove the remaining unselected results from the listing.
Existing or new features can be viewed (or edited) by moving the 
cursor to the step and pressing the ENTER key.
The results are cleared automatically when the Find Function soft key 
is pressed again.
If the field is left blank, the data is calculated 
automatically.
Soft KeyFunction
Pressing the Keep All Results soft key will save all 
results found
Pressing the Clear Results soft key will clear all 
results not saved
Soft KeyFunction
Pressing the Keep One Result soft key will save the 
highlighted result found
Pressing the Clear Results soft key will clear all 
results not saved 
						

							ACU-RITE MILLPWRG2 215
9.2 Geometry User Interface
Returning features to the part program
Press the Return Feature to transfer the current geo step to the part 
program. The soft key is disabled when it is not possible to transfer 
the current step to the program.
If no program step is open, Return Feature adds an equivalent 
program step at current location. The system returns to PGM view 
with the new step open.
If a program step is open, Return Feature (GeoPoint) returns the 
GeoPoint’s coordinate to the current field (x and y).
If a program step is open, Return Feature return of line or arc is only 
possible if feature matches the step type.
If the return type does not match the destination step/field, nothing 
is returned.
Geometry calculator functions
Pressing the Calc Function soft key opens a pop-up menu for 
selecting a function.
Clear calculator 
Removes all Geo steps from the calculator.
Loading and saving calculator contents
Press Save Calculator to save the current GeoCalc session to 
internal memory.
Press Load Calculator to load the previously saved GeoCalc 
session into the calculator.
Loading the part program into the geometry calculator
The Load Program function adds the equivalent geometry steps 
(GeoPoint, GeoLine, and GeoArc) from the program to the calculator 
listing at the current cursor location.
Hole patterns are converted to a series of GeoPoints.
Rectangle and circle steps are converted to profile GeoLines and 
GeoArcs
All other steps (tool, replication, engrave, etc.) are not supported 
						

							2169 Geometry/RPM Calculator
9.2 Geometry User Interface
Program example
In some  cases, a part drawing may not provide all of the dimensions 
needed to program the part. In the following illustration the 
coordinates of points B and C, where the arc is tangent to the sides, 
are unknown. 
The coordinates will have to be identified before lines A-B and A-C and 
the arc that extends from point B to point C can be programmed.
Locating points B and C
First program an extended line from A to B, then program an extended 
line from A to C. Now use GeoCalc to calculate the rest.
Enter the extended line from A to B
Enter the extended line from A to C at 45°
Select lines A-B and A-C, and then use the Find Arc soft key
Recalculate point B, then return its coordinate and the arc into the 
program
This example is explained fully in the following step by step 
illustrations.
Creating the program
Step 1
Point A is shown as the datum. Its absolute coordinates are 0, 0. In the 
part program. The first step will be to draw the line by entering the 
absolute coordinates for point A (0, 0) in the “From” field and point B 
(2, 0) in the “To” field.
Press the LINE key and enter the data in the GeoLine 
dialogue. Enter 0 in the From X1 field, and 0 in the 
From Y1 field.
Enter 2 in the To X2 field, and 0 in the Y2 field.
Press the USE key to enter the data into the program. 
						

							ACU-RITE MILLPWRG2 217
9.2 Geometry User Interface
Step 2
The second step will be to draw a line by entering the absolute 
coordinates for point C (2, 2) in the “From” field and point A (0, 0) in 
the “To” field.
Press the LINE key and enter the data in the GeoLine 
dialogue. Enter 2 in the From X1 field, and 2 in the 
From Y1 field.
Enter 0 in the To X2 field, and 0 in the Y2 field.
Press the USE key to enter the data into the program.
The Geometry Calculator screen should now have these two lines 
displayed. 
						

							2189 Geometry/RPM Calculator
9.2 Geometry User Interface
Step 3
Finding the arc that’s tangent to the two lines.
Highlight 001 GeoLine and press the Select Feature 
soft key. The ARROW indicates that the feature has 
been selected.
Next, highlight 002 GeoLine and press the Select 
Feature soft key.
Press the Find Arc soft key. A pop up dialogue will 
display a field to define the arc radius.
Enter the radius of 1.
Press the USE key. 
GeoCalc will display all the arcs that have a radius of 1 that are tangent 
with the two lines.
Using the ARROW keys, scroll through the list of found GeoArcs until 
the arc desired is highlighted.
Press the Keep One soft key, and GeoCalc will save the arc as item 
003.
Then press the Clear Results soft key to erase the remaining arcs. 
						

							ACU-RITE MILLPWRG2 219
9.2 Geometry User Interface
Finding the points of tangency
The points of tangency between the lines and the arc need to be 
determined. Now that the arc is in place, the coordinates of its end 
points are needed. Use GeoCalc’s find point feature to find the end 
points of the arc.
Highlight 001 GeoLine and press the Select Feature 
soft key. This will de-select the line and cause the 
arrow to disappear.
Highlight 002 GeoLine and de-select it.
Highlight 003 GeoArc and press the Select Feature 
soft key to select it.
Press the Find Point soft key. Three points will 
appear: one is the center of the arc and the others are 
the ends of the arc. The point on the bottom is the 
one needed; it’s point B on the drawing. 
Using the ARROW key, scroll down through the list of 
GeoPoints until the point on the bottom is 
highlighted. Press the Keep One Result soft key.
Press the CANCEL key to return to the program.
Returning the line coordinate
Bring the GeoCalc results back into the program. When you press the 
Return Feature soft key, GeoCalc will transfer the feature you’ve 
identified into your part program.
Press the LINE key to begin a new Mill Line dialogue. 
Enter coordinates for the From point (point A). ARROW 
down to the X2 field. This is point B, one of the points 
found in GeoCalc.
Press the  CALC key. 
Press the Geometry soft key.
Highlight the GeoPoint representing point B 
(step 004). Press the Return Feature soft key. The 
program screen will return, and point B’s coordinates 
will appear in the To field. 
Press the USE key to accept the line into the part  
program.
Program the tool step prior to proceeding. 
						

							2209 Geometry/RPM Calculator
9.2 Geometry User Interface
Returning the arc feature
Press the  CALC key. 
Press the Geometry soft key.
Highlight the GeoArc (step 003). Press the Return 
Feature soft key. The program screen will return and 
automatically add an arc step to your program and 
place the arcs information into the dialogue. 
Press the USE key to accept the arc into the part  
program.
Finishing the program
Press the LINE key to begin a new Mill Line dialogue. 
Enter coordinates for the To point (point A).
Press the USE key to accept the line into the part  
program.