Draw Dragline Limits

This command draws an outline in profile view of the dragline reach, depth and height limits. The program draws the limits of the dragline as polylines in the current layer. These limit polylines serve a guides in other dragline commands like Cut & Place. Also these dragline commands will check the dragline limits and report if the dragline limits are exceeded when processing the sequence file. The dragline parameters are set in the Define Dragline Equipment command. Before starting this command, the dragline should be defined in Define Dragline Equipment and the surface where the dragline sits should be drawn as a polyline in profile view. This polyline can be drawn with the Draw Fence Diagram command or the profile commands in the Civil Design module.

The window prompts for the horizontal and vertical scale. This is to determine the vertical exaggeration if any. There is an option to draw an icon of the dragline. Otherwise the limits are only drawn as polylines. Choose a direction for the boom to be facing, left or right. The draw swing angles option will label the angles along the top of the limit polyline. The Group Dragline Entities will keep it together as a block instead of individual polylines. If the program detects that dragline limits are already in the drawing, then there is an option to erase the existing limits. This option is useful for automatically erasing old limits before drawing the new limits, as the program tracks where the dragline is located to measure the reach. Then pick the surface polyline and where along the polyline the dragline is located. There is an option to specify the dragline location by picking a reference point such as the top of the highwall and then entering an offset distance from the reference point to the center pin of the dragline (left offset is a negative value).

Prompts

Draw Dragline Limits Dialog
Choose Dragline dialog
Erase old dragline limit polylines [<Yes>/No]? Y for Yes if it is in the drawing
Select ground polyline: pick the polyline
Pick reference point (Enter for None): pick a point
Dragline distance from reference: -50 Negative for left, positive for right.

Pulldown Menu Location: Surface in the Mining Module
Keyboard Command: dlimits
Prerequisite: Surface polyline in profile view