Eagle Schematic Nets won't connect

Community PCB Design
1

I’ve been trying everything to just connect two pins on an Eagle schematic.

I am using Eagle 4.16r1 Pro, and I want to connect one pin from a capacitor device to a pin from a crystal device in the schematic.

I am using the Net command, and I’ve set the grid to finest (0.0001 mm), then I line the ends of each pin up perfectly with the net line. And I mean perfectly, the octogon shape lines up exactly on both ends.

I have to set the grid to finest, otherwise the Net line would just jump to the incorrect position.

Despite all my effort, when I save and run ERC, it says that all pins are unconnected, and that there are no pins on the net I’ve created.

I have opened the particular devices I’ve been using, and the pin positions are on the end of the device pin lines.

I have opened the demo schematics from Eagle, and everything is connected correctly there. Then I remove a connection, try to make exactly the same Net connection as it was before, and then it says that nothing is connected.

I have had a few times where the capacitor pin was connected with the net, but I have since failed to recreate this event.

I am so frustrated. Please assist.

2

Righty then…

Page 38 from the EAGLE tutorial manual:

EAGLE tutorial manual:
Please keep in mind:

You really should not change the default grid of 100 mil (= 2.54 mm) in

the Schematic Editor. Only this way you can be sure that nets will be

connected to the Devices’ pins.

1) Never change the grid in schematic editor from it's standard 0.1" grid...
  1. Ctrl + left click to pull the part by the anchor and place it on the current grid so the connections line-up…

If you’ve made the parts you’re placing, make sure you always place the schematic pins on a 0.1" grid in the symbol editor…

(also be sure to place the green circle end of the pins, layer 93, on the outside of the symbol in the symbol editor :roll: )

3

Catal:
I’ve been trying everything to just connect two pins on an Eagle schematic.

I am using Eagle 4.16r1 Pro, and I want to connect one pin from a capacitor device to a pin from a crystal device in the schematic.

There are several EAGLE users on this forum.

Can you post your EAGLE files (*.sch and *.brd)

for review?

Also, have you run ERC and DRC on your design?

It will catch most errors.

4

the gaseous simian is correct. schematic grid should be .1" (or 100 mil). Don’t do metric.

5

Every (or every good) part in Eagle has it’s pins on a .100" grid. Although the net and pins may look like they are connected, if they are .0001mm off, they won’t be connected (miss by an inch, miss by a mile, either way you missed). This is why it’s a good idea to keep the .100" grid in place, only changing it when you absolutely need to (and changing it back before you make any connections).

And if you’re not sure whether a connection has been made or not, always double check it with the ‘Show’ command.