ACU-RITE MILLPWR 3 Axes - Manual (Page 177)

CALCULATOR
MILLPWR ®
Operation Manual 6-15
Finding the Points of Tangency
The points of tangency between the lines and the arc (the coordinates for points C and D) 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 softkey. 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 softkey to select it.
• Press the FIND POINT softkey. Three points will appear—one is the center of the arc and the
others are the ends of the arc. The point on the right is the one needed; it’s point C on the
drawing.
• Using the arrow key, scroll down through the list of “GeoPoints” until the point on the right
is highlighted. Press the
KEEP ONE softkey.
The tangent point (C) is now stored in the GeoCalc as item 004.