Autorouting with PADS Router

nuoan

With the PADS Router Link you can set up autorouting options from PADS
Layout and then send the design to PADS Router for autorouting. When
autorouting completes, PADS Router closes and a new session of PADS Layout
opens containing a routed version of your file.
The link gives you the option of automatically opening the current design file in
PADS Router to view routing progress or to autoroute in the background – to
speed up the process.

In this lesson:
Ÿ Preparing the design for autorouting
Ÿ Transferring the design to PADS Router for autorouting
Restrictions
This tutorial requires the General Editing and Split Planes licensing options.
To determine whether you can proceed:
Ÿ On the Help menu, click Installed Options.

Preparation
If it is not already running, start PADS Layout and open the file named
previewpreroute.pcb in the \PADS Projects\Samples folder.
Prepare the design for autorouting
Before you begin autorouting, you must set up your design file for proper
autorouting in PADS Router.
Update net visibility
In the placement tutorial, the display of certain plane nets is disabled for a clear
view of how the components are interconnected during placement. Before you can
route the plane nets, you need to enable the display of those nets.
1. View menu > Nets.
2. In the View list, select +5V, +12V, GND.
3. In the View Details area, select the Traces Plus the Following Unroutes
check box to enable the display of these nets.
4. Click All Except Connected Plane Nets to limit the display of the nets to only
the routed portions of the nets.
5. Turn off the color for net +5V by selecting it and clicking None in the Colors
by Net area.
6. Click OK.
Perform a length minimization of net connections
Displaying the plane nets reveals that the net lengths were not minimized.
Ÿ Tools menu > Length Minimization
Alternative: Press Ctrl+M.
Transferring the design to PADS Router for autorouting
The process of autorouting PCB designs in PADS Router begins with the PADS
Router Link.
The design file used in this tutorial has a Conditional Rule that requires the
Advanced Rules licensing option, however you can delete the conditional rule in
the design file once it is open in PADS Router and proceed with the tutorial.
Instructions for this workaround are included below.
Start the PADS Router Link and assign link options
1. Tools menu > PADS Router.
2. In the PADS Router Link dialog box, click Autoroute in Foreground in the
Action area. This allows you to watch the autorouting process.
3. In the Options area, click Grid and then click Setup.
4. On the Grids page of the Options dialog box, turn off the Snap to Grid check
boxes for the Design, Via and Fanout grids.
5. Click OK.
6. When you are ready to begin autorouting in PADS Router, click Proceed. In a
few moments, a session of PADS Router appears and it automatically starts
autorouting your design.
Exception: The process stalls at this point if you don’t have the Advanced
Rules licensing option. The design file opens in PADS Router, with the
following message on-screen, “You are not licensed to route with the
Advanced Rules in your design. You must remove the rules or obtain an
Advanced Rules license.” Follow these steps to remove the conditional rules
and continue the process:
a. In the message box, click OK.
b. On the View menu, ensure the Project Explorer is turned on.
c. In the Project Explorer window, expand the Net Objects branch.
d. In the Net Objects branch, expand the Conditional Rules branch.
e. In the Conditional Rules branch, right-click on the conditional rule
“+12V: +5V (All layers)” and click Delete.
f. On the Tools menu, point to Autoroute and on the submenu, click Start.
Tip: If you are running the PADS Router Link for the first time, the PADS
Router Monitor appears after you click Proceed. See the next section for more
information.
If you ran the PADS Router Link previously, the PADS Router Monitor remains
on your Windows Taskbar after you click Proceed. Click the PADS Router
Monitor button on the Taskbar to open the PADS Router Monitor dialog box.
The PADS Router Monitor
Use the PADS Router Monitor to track autorouting progress and set options for
post-routing.
1. If PADS Router already finished your design, close PADS Router and the
second PADS Layout window containing the autorouted design. Use the
PADS Router Link again and immediately proceed with the following steps.
2. While PADS Router is routing your design, click the PADS Router Monitor
button on the Taskbar to open the PADS Router Monitor dialog box.
3. Click Close When Finished and make sure Load the Resulting File and Exit
PADS Router on Completion are also selected.
4. Wait until PADS Router is done autorouting.
When PADS Router finishes autorouting, the PADS Router Monitor dialog
box and the PADS Router session closes. The routed file appears in a new
session of PADS Layout.
Result: After PADS Router completes autorouting, the PADS Router Link
returns the file to a new PADS Layout session. At this point, you should close the
original PADS Layout session to avoid possible confusion due to duplicate
instances of PADS Layout.
5. Do not save a copy of the design

ky175

自动布线吗？

lcfmax

啥意思？