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Chapter 7
Autorouting and Autoplacement
This is only active when an unconnected pad corresponding to that net is selected.
Note
Autoplacement of Parts
Pre-Placing Parts
Understanding How the Autoplacer Works
NI Ultiboard User Manual
Autoroute»Autoroute Selected Buses
Use to autoroute selected buses. Refer to the
more information.
Autoroute»Start Optimization
Use to optimize the placement of traces. Refer to the
for more information.
Autoroute»Autoroute/place Options
Use to set up router and placer functions. Refer to the
Routing Functions
and
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
User
Interface, 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.
Controlling the Autoplacer
Spreadsheet View: Parts Tab
7-2
Autorouting buses
section for
Optimization
Controlling the
sections for more
section of Chapter 1,
section
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