Designate Pin 1 for manufacturing

Am 22.05.2018 um 18:27 schrieb Joshua Jackson:

I've got a few custom devices on my PCB where I laid out the package (footprint) and schematic symbol myself.  On the footprint I have clearly numbered each pin to match the manufacturer's datasheets using the convention P$1 etc.  However when I generate the Gerber files and P & P files I have had 2 different manufacturers tell me they cannot tell where Pin 1 is on my footprints.

 

Should I be using something besides P$1 as a convention?  Is there somewhere else I should be designating a P1 so it is clear in the manufacturing files?

 

--

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If you had a look at the delivered eagle libraries you would see that no

SMD/PAD in the packages have something like P$1. (These Numbers are

generated by default from eagle.)

They have Numbers from 1 to... what ever

So just use the NAME command in  the  package editor to rename your

smd/pads correctly.

Then check in the device editor that the symbol pins are correctly

connected to the package pads.

--

Mit freundlichen Grüßen / With best regards

Joern Paschedag

Am 22.05.2018 um 18:27 schrieb Joshua Jackson:

I've got a few custom devices on my PCB where I laid out the package (footprint) and schematic symbol myself.  On the footprint I have clearly numbered each pin to match the manufacturer's datasheets using the convention P$1 etc.  However when I generate the Gerber files and P & P files I have had 2 different manufacturers tell me they cannot tell where Pin 1 is on my footprints.

 

Should I be using something besides P$1 as a convention?  Is there somewhere else I should be designating a P1 so it is clear in the manufacturing files?

 

--

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

https://www.element14.com/community/message/239733

 

If you had a look at the delivered eagle libraries you would see that no

SMD/PAD in the packages have something like P$1. (These Numbers are

generated by default from eagle.)

They have Numbers from 1 to... what ever

So just use the NAME command in  the  package editor to rename your

smd/pads correctly.

Then check in the device editor that the symbol pins are correctly

connected to the package pads.

--

Mit freundlichen Grüßen / With best regards

Joern Paschedag

On 22/05/18 17:27, Joshua Jackson wrote:

However when I generate the Gerber files and P & P files I have had 2 different manufacturers tell me they cannot tell where Pin 1 is on my footprints.

 

Should I be using something besides P$1 as a convention?  Is there somewhere else I should be designating a P1 so it is clear in the manufacturing files?

In addition to what Joern says, the manufacturer is probably not

expecting pin numbers on the silk screen (even if you're actually

getting them). Check the datasheet for each of your ICs and you will see

that there is a "pin 1 marker" somewhere on the chip, normally in the

form of a dot or a dimple. You need to show that, or something like it,

on the silk screen (or an accompanying assembly guide if the silk can't

accommodate it).

Am 22.05.2018 um 18:27 schrieb Joshua Jackson:

I've got a few custom devices on my PCB where I laid out the package (footprint) and schematic symbol myself.  On the footprint I have clearly numbered each pin to match the manufacturer's datasheets using the convention P$1 etc.  However when I generate the Gerber files and P & P files I have had 2 different manufacturers tell me they cannot tell where Pin 1 is on my footprints.

 

Should I be using something besides P$1 as a convention?  Is there somewhere else I should be designating a P1 so it is clear in the manufacturing files?

 

--

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

https://www.element14.com/community/message/239733

 

Hi,

if you use THT then you can

give the Pin1 an other shape.

Pin1 shape "square"

all others "round"

HTH

Werner

Am 22.05.2018 um 18:27 schrieb Joshua Jackson:

I've got a few custom devices on my PCB where I laid out the package (footprint) and schematic symbol myself.  On the footprint I have clearly numbered each pin to match the manufacturer's datasheets using the convention P$1 etc.  However when I generate the Gerber files and P & P files I have had 2 different manufacturers tell me they cannot tell where Pin 1 is on my footprints.

 

Should I be using something besides P$1 as a convention?  Is there somewhere else I should be designating a P1 so it is clear in the manufacturing files?

 

--

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

https://www.element14.com/community/message/239733

 

Hi,

if you use THT then you can

give the Pin1 an other shape.

Pin1 shape "square"

all others "round"

HTH

Werner

Am 22.05.2018 um 18:27 schrieb Joshua Jackson:

I've got a few custom devices on my PCB where I laid out the package (footprint) and schematic symbol myself.  On the footprint I have clearly numbered each pin to match the manufacturer's datasheets using the convention P$1 etc.  However when I generate the Gerber files and P & P files I have had 2 different manufacturers tell me they cannot tell where Pin 1 is on my footprints.

 

Should I be using something besides P$1 as a convention?  Is there somewhere else I should be designating a P1 so it is clear in the manufacturing files?

 

--

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

https://www.element14.com/community/message/239733

 

Hi,

if you use THT then you can

give the Pin1 an other shape.

Pin1 shape "square"

all others "round"

HTH

Werner

As others have said, name your pins properly (It wont help the manufacturer determine orientation in the Gerbers though) and for THT you can optionally set the pin 1 location to a different shape.

But you should be providing this indication on your silk screen and in your assembly drawings. I wrote a library creation tutorial a while back. You can find the section on creating packages here: EAGLE Tutorial: Library Part Creation Part 1 - Creating Packages

Best Regards,

Rachael

On 05/22/2018 12:27 PM, Joshua Jackson wrote:

I've got a few custom devices on my PCB where I laid out the package (footprint) and schematic symbol myself.  On the footprint I have clearly numbered each pin to match the manufacturer's datasheets using the convention P$1 etc.  However when I generate the Gerber files and P & P files I have had 2 different manufacturers tell me they cannot tell where Pin 1 is on my footprints.

 

Should I be using something besides P$1 as a convention?  Is there somewhere else I should be designating a P1 so it is clear in the manufacturing files?

 

--

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

https://www.element14.com/community/message/239733

Joshua,

In addition to the prior advice from Eagle experts, there are other ways

of marking pin 1.

Already mentioned by Eagle experts:

    - a dot or dimple in one corner

    - a square through-hole pad

There are other methods worth mentioning as well:

    - a bar on the top surface near the end of a rectangular package

    - an angled corner

    - a beveled edge

Take a look at the various packages in ipc-smd.lbr.  The packages

publishes in that library//should be IPC standard and have IPC markings

for pin 1.

And they're right - get rid of the P$x crap that Eagle puts in there by

default and number them properly.  Remember that BGA's will have both

letters digits in their pad names.

HTH,

    - Chuck

On another unrelated note, I would eagerly welcome perpetual licenses.

On 05/22/2018 12:27 PM, Joshua Jackson wrote:

I've got a few custom devices on my PCB where I laid out the package (footprint) and schematic symbol myself.  On the footprint I have clearly numbered each pin to match the manufacturer's datasheets using the convention P$1 etc.  However when I generate the Gerber files and P & P files I have had 2 different manufacturers tell me they cannot tell where Pin 1 is on my footprints.

 

Should I be using something besides P$1 as a convention?  Is there somewhere else I should be designating a P1 so it is clear in the manufacturing files?

 

--

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

https://www.element14.com/community/message/239733

Joshua,

In addition to the prior advice from Eagle experts, there are other ways

of marking pin 1.

Already mentioned by Eagle experts:

    - a dot or dimple in one corner

    - a square through-hole pad

There are other methods worth mentioning as well:

    - a bar on the top surface near the end of a rectangular package

    - an angled corner

    - a beveled edge

Take a look at the various packages in ipc-smd.lbr.  The packages

publishes in that library//should be IPC standard and have IPC markings

for pin 1.

And they're right - get rid of the P$x crap that Eagle puts in there by

default and number them properly.  Remember that BGA's will have both

letters digits in their pad names.

HTH,

    - Chuck

On another unrelated note, I would eagerly welcome perpetual licenses.