misaligned grid and test points

On 1/6/2011 5:28 PM, Jay Beritz wrote:

I created a schematic with just a single Analog Devices ADIS16209 now I

need test points. I will be using Keystone miniature color coded thru-hole

type. .100 Dia.

http://www.keyelco.com/pdfs/M55p51.pdf

What is the equivalent in Eagle? I tried some of the built in test pads but

they don't show dimensions. I tried keeping a standard default 0.1 inch

grid. When I create the schematic everything aligns but when I create the

board they don't align with the grid why? This is my my very first board.

The schematic must always be on a 0.1 grid or it won't work. The board

grid is totally separate and the routing grid is another grid setting.

You can set the layout grid to whatever you want in order to place the

footprints or other objects where you want them. The routing grid

determines how easily the components connect, it should be maybe 5 times

smaller than the smallest hole/pad spacing you have. Making it finer

makes more complicated and slower connections, too coarse and the

autorouter won't be able to complete the connections.

On 1/7/2011 1:17 PM, Gary Gofstein wrote:

On 1/6/2011 5:28 PM, Jay Beritz wrote:

>> I created a schematic with just a single Analog Devices ADIS16209 now I

>> need test points. I will be using Keystone miniature color coded

>> thru-hole

>> type. .100 Dia.

>> http://www.keyelco.com/pdfs/M55p51.pdf

>> What is the equivalent in Eagle? I tried some of the built in test

>> pads but

>> they don't show dimensions. I tried keeping a standard default 0.1 inch

>> grid. When I create the schematic everything aligns but when I create the

>> board they don't align with the grid why? This is my my very first board.

The schematic must always be on a 0.1 grid or it won't work. The board

grid is totally separate and the routing grid is another grid setting.

You can set the layout grid to whatever you want in order to place the

footprints or other objects where you want them. The routing grid

determines how easily the components connect, it should be maybe 5 times

smaller than the smallest hole/pad spacing you have. Making it finer

makes more complicated and slower connections, too coarse and the

autorouter won't be able to complete the connections.

In the library testpad.lbr you can find the parts you need, pick the

package that closest matches or exceeds the hole size on the keystone

datasheet.

I create a new schematic

I select add

I de-select Smd's in the search parameter and search for test pad

I expand the search result "testpad"

Under "TP" I select the fifth choice "TPPAD1-17"

The three boxes to the right in the "add" dialog don't show me any drill

sizes. If I go ahead and add it then right click and go to properties, I

still see nothing that tells me the hole size.

Where is this information?

I add the test pads and wire them to the chip.

File -> Switch to Board, "And let Eagle create the board from  the

schematic."

I change the grid size to 0.01 inch

I move the chip and pads into position.

I route the chip's pads to the test pads.

But no matter what I set the grid to, the center of the chip pads and the

center of the test pads will not align to the grid.

When I do a Errors check it it's says: Errors(0), Approved(0)

Shouldn't it say Approved(1) or more?

Also when I'm I have the board open I'm looking at the chip from the top

down correct?

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

Thank you. I just wasn't right clicking on the origin cross. I was clicking

on the border of the chip instead and only getting a "move" menu or another

area and getting a ghosted out move menu.

--

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

Thank you. I just wasn't right clicking on the origin cross. I was clicking

on the border of the chip instead and only getting a "move" menu or another

area and getting a ghosted out move menu.

--

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