Справочник Пользователя для National Instruments Ultiboard

operations on traces, be sure to select either the appropriate segment or, if 
you wish, the whole trace. 

Clearance is the distance from the edge of the board and around pads and 
traces that is to be kept free of any other elements. Trying to run a trace 
through a clearance, or trying to place a part so that a pad is put within a 
clearance, for example, results in an error. The board outline clearance is 
defined in the PCB Properties dialog box. Clearances for other copper 
elements are defined in the General tab of the element’s properties. Refer 
to the 

 section for more 

information. 

To view clearances, choose View»Clearances. The clearances are shown 
as fine blue lines around pads and traces.  

Ultiboard’s default trace measures 10 mil wide and has a clearance of 
10 mil. Clearances are measured from the outside edge of an object: a 
10 mil trace with a 5 mil clearance would measure 20 mil across from edge 
to edge (5 mil clearance on one side, the 10 mil trace, and 5 mil clearance 
on the other side). 

When you place a trace manually, you click pads and vias, and you must 
also click the trace’s pivot points. This means that you have the most 
control over where the trace lies, but you must avoid placing the trace 
through parts and over other traces. If you try to place a manual trace 
through a part or over another trace, an error is generated in the DRC tab 
of the Spreadsheet View. 

Complete the following steps to place a trace manually: 

1.

Choose a copper layer. 

2.

Select or enter the desired trace size in the Draw Settings toolbar. 

3.

Choose Place»Line. 

4.

Click a pad on the board. The net the pad is a part of is highlighted, and 
the pads in the net are each marked with an X. 

5.

Make your way to the next pad in the net. Remember to avoid parts and 
other traces. Click to fix the trace to the board each time you change 
direction.