Actions
Forum Thread Details
  • Replies 7 replies
  • Subscribers 178 subscribers
  • Views 608 views
  • Users 0 members are here
Related

ripup and prefs for autorouter

Former Member

Hi everybody, eagle-6.1 free newbie here.  Eagle newbie, never used it till

now.  Very old hand at electronics, 60+ years working in both design and

repair.

 

I have designed a 9 part, double sided board, 3 of the parts are

opto-interruptors but I find that the router wants to put connections to it

on the top side of the board.  I am feeding this to pcb2gcode and milling

the board on a small mill running what used to be emc but which we were

forced to rename to LinuxCNC a few weeks back.

 

My problem is that I cannot plate thru the component holes, so by the time

I run a piece of 30 gage kynar wire thru the hole and solder the top, the

solder prevents the opto device from sitting down on the board so it can be

bolted down.

 

That means that I need to specify to the auto router somehow, that those 5

terminals on each of the 3 devices need to be wired from the bottom without

exception.  The 3 resistors and 3 diodes can be soldered top and bottom as

they are accessible to my soldering iron from both sides. Small vias aren't

a problem as long as they aren't under these devices.

 

Perhaps an outline of a verboten area in the Tkeepout layer?  Likely there

are several ways to skin this long lived cat and I'm thinking out loud.

 

Is there some way, perhaps even in that parts library description, to tell

the autorouter that this part can only be connected to on the bottom,

solder side of the board?  Perhaps by nuking the via outline in layer 1,

leaving only the leads through hole?

 

Or some similar workaround that would do the same thing by removing the top

layer from the autorouters "I can use this" mapping?

 

Thanks, Gene

 

--

Cheers, Gene

--

"There are four boxes to be used in defense of liberty:

soap, ballot, jury, and ammo. Please use in that order."

-Ed Howdershelt (Author)

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

 

Parents

  • That's probably very true.  This old fart is sort of fond of the printed

    word, probably to my detriment.

     

    That said, I did manage to edit the library for this opto part and changed

    the shape, size & orientation of its connector pads, updated from the

    library,then fiddled about with ripup and some of the vars in autorouter &

    managed to hit a setting that used the resistor and diode legs for all the

    required thru via's.  This is almost ideal as that will give me a decent

    amount of copper to touch with my iron, which in turn should reduce the

    bridging problems.

     

    What would really be nice is the ability to trim out a .010" or .012" wide

    gap from just the side of a via that causes a too close error.  These

    things with legs on .050 centers are a PIMA!  But this one should build a

    heck of a lot easier than the first one did.

     

    Now, when the shop warms up again, I can carve out a slot wheel for this

    encoder with longer slots so I can actually hit the A/B slots with 2 of the

    opto's, and the Z slot about 40 thou outside of the A/B circle and get a

    working encoder once the opto's are bent around a few thou for good

    quadrature of the A/B signals.  If the next wheel fits, the next board s/b

    easy to setup.

     

    Progress, I think. image

     

    Thanks Warren.

    --

    Cheers, Gene

    --

    "There are four boxes to be used in defense of liberty:

    soap, ballot, jury, and ammo. Please use in that order."

    -Ed Howdershelt (Author)

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

Reply

  • That's probably very true.  This old fart is sort of fond of the printed

    word, probably to my detriment.

     

    That said, I did manage to edit the library for this opto part and changed

    the shape, size & orientation of its connector pads, updated from the

    library,then fiddled about with ripup and some of the vars in autorouter &

    managed to hit a setting that used the resistor and diode legs for all the

    required thru via's.  This is almost ideal as that will give me a decent

    amount of copper to touch with my iron, which in turn should reduce the

    bridging problems.

     

    What would really be nice is the ability to trim out a .010" or .012" wide

    gap from just the side of a via that causes a too close error.  These

    things with legs on .050 centers are a PIMA!  But this one should build a

    heck of a lot easier than the first one did.

     

    Now, when the shop warms up again, I can carve out a slot wheel for this

    encoder with longer slots so I can actually hit the A/B slots with 2 of the

    opto's, and the Z slot about 40 thou outside of the A/B circle and get a

    working encoder once the opto's are bent around a few thou for good

    quadrature of the A/B signals.  If the next wheel fits, the next board s/b

    easy to setup.

     

    Progress, I think. image

     

    Thanks Warren.

    --

    Cheers, Gene

    --

    "There are four boxes to be used in defense of liberty:

    soap, ballot, jury, and ammo. Please use in that order."

    -Ed Howdershelt (Author)

    --

    Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

     

Children
No Data