Wiring problem on Eagle

On 7/22/2016 11:42 AM, djib ty wrote:

Hello,

I got a problem because I can't wire to a component I created. First, I created a library for the component with Symbol, then Package and Device.

But when I am using this component on my schematic, I can't wire it. I used the same scale and grid for all the schematics and I updated libraries. But it is impossible to wire it.

If anyone has an idea to solve my problem ?

 

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Hi Djib,

I hope you're doing well. Make sure that the part was made to a 0.1"

grid. Also in order to see the connection points clearly turn on layer

93 Pins in the schematic. You will now see lots of green circles one for

each pin. The center of those circles is the connection point, all of

your nets must start and end on the exact center of these circles(this

is why it's important to stay on a 0.1" grid). If you don't see green

circles on your part then that means you didn't use the PIN command and

you need to go back to your library and create pins. One final thing to

check make sure you are using the NET command to create your connections.

Let me know if there's anything else I can do for you.

Best Regards,

Jorge Garcia

Hello Jorge,

I turned on layer 93 Pins on the schematic and I can see green circles for each pin of my component.

Unfortunately, I still can't wire it because the nets don't start or end on the exact center of the circles.

Meanwhile, I used 0.1 inch grid for Symbol, Package and Device. Then, I updated libraries but it's the same problems with nets which can't connect in the exact center of the circles.

Am 25.07.2016 um 11:14 schrieb djib ty:

Hello Jorge,

 

I turned on layer 93 Pins on the schematic and I can see green circles for each pin of my component.

Unfortunately, I still can't wire it because the nets don't start or end on the exact center of the circles.

Meanwhile, I used 0.1 inch grid for Symbol, Package and Device. Then, I updated libraries but it's the same problems with nets which can't connect in the exact center of the circles.

 

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To view any images and attachments in this post, visit:

https://www.element14.com/community/message/202228

 

Seems that your device is not on grid. Why don't you just place it here.

A picture (eagle sch, brd or lbr) is better than 1000 words.

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Mit freundlichen Grüßen / With best regards

Joern Paschedag

Hello,

From what you are saying Jorge is right, the issue is things not being on the 0.1" grid. So you need to do a few things.

1) Double check your grid set up on your schematic is 0.1" still.

2) Use the MOVE function to snap each or your components to the grid using ctrl+click on each to ensure they are correctly aligned to the grid.

3) If you still have a problem, edit your symbol and perform the same operations as above for each of the pins in the symbol to ensure they are correctly on the grid and then replace the part in the schematic with your updated one.

The steps above should hopefully resolve your problem.

Best Regards,

Rachael

Hello,

Enclosed three pictures of the component I created in library. Symbol :

Package :

Device :

Yes, you are right, my component is not on the grid.

Coordinates :

RE pin : x= - cos(Pi/4)*8.5mm = - 6.01040764 mm

               y= sin(Pi/4)*8.5mm = 6.01040764 mm

CO pin :

               x= -cos(Pi/4)*8.5mm = 6.01040764 mm

               y= sin(Pi/4)*8.5mm = 6.01040764 mm

WO pin : x=0

               y = 8.5 mm

LO pin : x=0

               y = -8.5 mm

Hello,

I understand what you mean but I got a problem with the placement of the pins, I am using decimal values for pins and this is the issue I think.

You can look my answer above, I showed my schematic and the values of the pins for their placement.

Regards, Djib.

Hi Djib,

So it looks like you are trying to design your schematic symbol to mirror the size and shape of the actual component for some reason. I can't think of a good technical reason to do that for the symbol. Having looked at the part in your schematics above, it's an ammonia sensor so there obviously isn't a common symbol for this. If it were me I would create a rectangular component like any typical IC, line up the pins on the 0.1" grid in a logical manner (so your schematic flows nicely) and if you want to make it clear on the schematic what the part is then add a box and some textual notes on the schematics or maybe label the symbol itself to say it's a sensor and it's type. I have additional properties in my symbols to specify what they are which I can place visibly on the symbols with >AttributeName much like with >NAME and >VALUE if needed.

Best Regards,

Rachael

Hi,

In fact, I just want to create a connector for my component. I have to use 0.1" grid or can I use a more accurate one ?

Moreover, all dimensions are in millimeters in the datasheet of my component. I would prefer use a grid in millimeters.

( I succeded to wire one pin but I don't know how I did it, when I deleted the wire and created a new one, it didn't connect, very strange..)

Hi Djib,

You'll need to use the 0.1" grid for the pins. You can use a finer grid for placing text attributes like >NAME and >VALUE on the symbol so they are nicely positioned and the body of the symbol can be as intricate as you like so you could draw the symbol body with the finer grid to match the connector shape and then place the pins on the 0.1" grid as close to where they need to be on the symbol body as possible and then again with the finer grid draw lines to match them up. The key thing is the pins must be on the 0.1" grid or you'll end up with problems.

Best Regards,

Rachael

Ok now I can connect wires because I used 0.1" grid but I don't have the good dimensions. For example, I need to have x=0 and y=8.5mm for a pin and I used x=0 and y=0.3 inches (7.62 mm).

That's a big issue.