Справочник Пользователя для National Instruments Ultiboard

This is only active when an unconnected pad corresponding to that net is selected. 

Use to autoroute selected buses. Refer to the 

 section for 

more information. 

Use to optimize the placement of traces. Refer to the 

for more information. 

Use to set up router and placer functions. Refer to the 

 and 

 sections for more 

information. 

The following sections explain how to use the autoplacer to place parts. 

You may wish to pre-place certain parts (for example, holes) before 
autoplacing other parts.

Complete the following steps to lock any pre-placed parts so they will not 
be moved by the autoplacer: 

1.

Select the pre-placed parts and choose Edit»Lock. 

2.

You can also lock parts in place from the Parts tab of the Spreadsheet 
View. Refer to the 

 section of Chapter 1, 

, for more information. 

The autoplacer automatically places all unplaced parts onto your board 
according to group settings you can specify. It uses a rip-up and retry 
algorithm to find the best part positioning. As the autoplacer runs, the status 
line at the bottom of the screen indicates how many autoplacement passes 
have been completed. It also indicates how many parts have been placed 
and how many pins have been swapped (when the autoplacer performs 
pin/gate swaps). If the autoplacer cannot place all the parts, it returns a 
message indicating how many parts are still unplaced in the Results tab of 
the Spreadsheet View.