DRC Errors

Matthew wrote:

Hello everyone,

 

I did a design rule check and I am getting some errors as shown

hereunder.

 

>

 

higher quality

http://i53.tinypic.com/313q5go.png

http://i53.tinypic.com/5o7c06.png

 

I Have 794 Errors

Errors are

(Angle)

(Off Grid)

 

For the Angle errors:

DRC/Misc/Check Angle

Warren

On Sat, 2 Apr 2011, Matthew wrote to us saying :

>I did a design rule check and I am getting some errors as shown hereunder.

>I Have 794 Errors

>Errors are

>(Angle)

>(Off Grid)

The angle errors are mostly tracks within pads, which result from

off-grid pads if you route to the pad but not if you route from the pad.

However, it looks like you've set the grid to 2mm when using traditional

0.1" through-hole components. This is a bad idea. You should set the

grid to 0.05" for this sort of board.

When routing to components with pad-spacing that doesn't match the grid,

always try to start from that pad and lay a track to somewhere on-grid

before routing further. Also, if you're going to run with the

angle-check enabled, be careful to never use the direct-line routing but

keep the route settings on one of the right-angle or 45-degree modes.

--

Rob Pearce                       http://www.bdt-home.demon.co.uk

The contents of     | All power corrupts, but we need electricity.

this message are    |

purely my opinion.  |

Don't believe a     |

word.               |

On 4/3/2011 1:07 PM, Robert Pearce wrote:

On Sat, 2 Apr 2011, Matthew wrote to us saying :

>>

>> I did a design rule check and I am getting some errors as shown

>> hereunder.

>>

>> I Have 794 Errors

>> Errors are

>> (Angle)

>> (Off Grid)

>>

The angle errors are mostly tracks within pads, which result from

off-grid pads if you route to the pad but not if you route from the pad.

 

However, it looks like you've set the grid to 2mm when using traditional

0.1" through-hole components. This is a bad idea. You should set the

grid to 0.05" for this sort of board.

 

When routing to components with pad-spacing that doesn't match the grid,

always try to start from that pad and lay a track to somewhere on-grid

before routing further. Also, if you're going to run with the

angle-check enabled, be careful to never use the direct-line routing but

keep the route settings on one of the right-angle or 45-degree modes.

I would go down to .025, it's usually good to set the routing grid to

1/4 or 1/5 the smallest pitch. And keep it in the same measurement

system as the most common components to minimize the procedure that

Robert talked about with routing from, rather than to, pads.

"Angle" just checks if you have tracks at other than 90, 45 or 0 degree

orientations, they aren't really problems other than esthetic and show

that you didn't use the routing grid, which you already know.