Is it possible to auto route just a partial part of the board?
Am 04.08.2010 23:16, schrieb Harry H. Arends:
Just a random guess but maybe through laying a STOP polygon around the
areas you dont want to route and later removing them.
On 5/30/2011 10:52 AM, Dominic Hoeglinger wrote:
>> Is it possible to auto route just a partial part of the board?
Just a random guess but maybe through laying a STOP polygon around theareas you dont want to route and later removing them.
a polygon in the stop layer makes holes in the solder mask. the restrict
and keepOut layers can be used to control where traces are routed and
components are placed. but I think the question is whether individual
nets can be autorouted or left unautorouted and the answer is yes. HELP
AUTO for info.
Gary Gofstein wrote:
>> Am 04.08.2010 23:16, schrieb Harry H. Arends:
>>> Is it possible to auto route just a partial part of the board?
>>
Autorouting takes place inside the bounds of the board outline in the
dimension layer20.
If you wish to autoroute a small area, the following works:
1) Move your board outline to another user defined layer (temporarily)
2) Draw an outline around the area to be autorouted (in layer 20 Dimension)
3) Autoroute
4) Restore the board outline to the correct layer
Airwires not ending within the boundaries do not get routed.
HTH
Warren
My previous post was written poorly and does not really work as described.
After a bit more testing on more complex designs:
Autorouting happens within the extremities of your design (components) and
limited by a dimension line outside of that area. If you draw the board
outline in the middle of your design the autorouter will route airwires
inside and outside that outline but not those that cross the outline.
Now, to recover from my previous post, it can be made to work the following
way:
Block out 'all' the area of your design that you do not want routed using
rectangles, or draw a polygon, on the 20-Dimension layer leaving only the
area of interest. You can leave your board outline, no need to move it to
another layer.
The exposed area alone will route. Airwires beneath the rectangles/polygon
and emerging from it will not route.
Remeber that there is a DRC setting for copper clearance from items in the
dimension layer so when you build the area to route make it a little
larger.
Deleting this 'blocking' from the Dimension layer later maybe safer/easier
than using the Restrict layers. This technique masks both the top and
bottom layers at the same time making it quicker than the restrict method
when identical top/bottom masking is required.
Try it, it's very workable.
I've attached the experiment I did with Hexapod from the Examples folder.
The first images show an airwire in the top right that looks like it should
have been routed and is not. I suspect this is to do with the DRC distance
settting keeping traces away from dimension layer objects. When I opened up
the polygon a little more as in the last image the routing occurred.
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