PCB Libraries Forum : Multiple Same Footprint Name

Multiple Same Footprint Name : In Expedition's padstack...

Sun, 20 Jan 2013 15:30:31 +0000

Author: Dale
Subject: 797
Posted: 20 Jan 2013 at 3:30pm

In Expedition's padstack generator the hole names and pad names are automatically generated based on their physical attributes. However in front of each name (in a list view) is a tick box which is labelled "Generate name from properties". If one deselects this box, the autogenerated name remains but then one is free to edit it in any way.

I have found this mechanism to be very effective and would recommend considering it for your footprint names.

I will also give my vote to a separate Suffix field which is always added to the end of any autogenerated name. Regardless of how good the autogenerated name is, there will always be times when a non-standard suffix makes sense.

Multiple Same Footprint Name : Thanks Tom. I'm looking forward...

Sat, 19 Jan 2013 13:11:21 +0000

Author: kwgilpin
Subject: 797
Posted: 19 Jan 2013 at 1:11pm

Thanks Tom. I'm looking forward to it.

Multiple Same Footprint Name : I see your point. We'll...

Sat, 19 Jan 2013 13:06:22 +0000

Author: Tom H
Subject: 797
Posted: 19 Jan 2013 at 1:06pm

I see your point. We'll have to consider this in the V2013 release coming out on February 1.

Multiple Same Footprint Name : Hi Tom, Tom H wrote: Manually...

Sat, 19 Jan 2013 13:04:36 +0000

Author: kwgilpin
Subject: 797
Posted: 19 Jan 2013 at 1:04pm

Hi Tom,

Tom H wrote:

Manually changing (customizing) the Footprint Name in the FPX file works perfect in Batch Mode.

This isn't entirely true. As soon as you select "Tools -> Regenerate Library -> Names" from the menu system, all custom names are destroyed.

This is why I was suggesting a new "Part Name Suffix" column be added to the FPX databases. When told to regenerate names, FPE would attach the contents of this column to each part name.

Multiple Same Footprint Name : You asked "What other Radio...

Sat, 19 Jan 2013 11:09:24 +0000

Author: lalexman
Subject: 797
Posted: 19 Jan 2013 at 11:09am

You asked

"What other Radio buttons do you want (specifically list them for our programmers)?

I responded to ones I though you could add based on your statement plus the body size that is not IPC approved and you cannot add.

So you are not going to add any other options to the radio button then the two you mentioned above ?

Multiple Same Footprint Name : Manually changing (customizing)the...

Sat, 19 Jan 2013 11:03:20 +0000

Author: Tom H
Subject: 797
Posted: 19 Jan 2013 at 11:03am

Manually changing (customizing) the Footprint Name in the FPX file works perfect in Batch Mode.

There are too many people who want too many different customized options to add to the program GUI. This makes the User friendly GUI and makes it complicated.

Multiple Same Footprint Name : So it sounds like are you saying...

Sat, 19 Jan 2013 10:57:16 +0000

Author: lalexman
Subject: 797
Posted: 19 Jan 2013 at 10:57am

So it sounds like are you saying you can add everything I suggested except body size ?

I realize you want to be IPC compatable but why is adding an option to a name we the users might need a problem ?

Yes we can add it to the FPX file but that does not work in batch mode and adds more time to creating a footprint.

Multiple Same Footprint Name : Unfortunately, IPC only recommends...

Sat, 19 Jan 2013 10:33:29 +0000

Author: Tom H
Subject: 797
Posted: 19 Jan 2013 at 10:33am

Unfortunately, IPC only recommends footprint names to be created with elements that solder to the PCB.

The Lead Span, Pin Pitch, Pin Qty, Lead Width & Length, Ball Size, Thermal Tab size, Lead tolerance.

The only exceptions to this rule is the component Height becasue it affects the 3D model name and BGA because Memory Chips have the same package size for various memory limits, 4GB, 8GB, 16GB, 32GB, etc.

i.e.: there is not any component package dimensions in the IPC naming convention. IPC approved the to add the Thermal Tab and Lead tolerance suffix extensions as optional data to reduce duplication.

The User can easily edit the Footprint name in the FPX file to whatever you want. It only takes a couple seconds to add any additional data to create customized footprint names.

The future feature modules the "Package Editor" and "Footprint Editor" will have custom footprint names that will apply to 50% of all packages in the industry.

Example: Component Family _ Mfr. Name _ Mfr. Part Number

This does not include any component package dimensions and there are no duplicate footprint names. Maybe every footprint name should follow this non-standard package convention as component manufacturers are producing non-standard parts.

Multiple Same Footprint Name : Body Size max (x and y) on...

Sat, 19 Jan 2013 10:16:47 +0000

Author: lalexman
Subject: 797
Posted: 19 Jan 2013 at 10:16am

Body Size max (x and y) on any device, lead size Max(x and y) on any device, Lead distance end to end on any device that the leads are larger then the body, bga pad size, DFN pad center to center spacing.

Basically what I am looking for is enough info in the footprint name to see quickly if the footprint matches the manufacturers device spec.

Multiple Same Footprint Name : Let me explain... In the V2013...

Sat, 19 Jan 2013 09:37:28 +0000

Author: Tom H
Subject: 797
Posted: 19 Jan 2013 at 9:37am

Let me explain...

In the V2013 release there will be 2 new on/off Radio Buttons for -

Add Thermal Tab data to footprint name (only for parts with Thermal Tabs)
Add Lead tolerance data to footprint name (only for parts w/Gull Wing leads)

QFN Examples of adding Thermal Tab data:QFN50P600X600X100-41 rename to

QFN50P600X600X100-41_T365 = Thermal Tab size is 3.65 mm square

QFN50P600X600X100-41_T365X200 = Thermal Tab size is 3.65 mm X 2.00 mm rectangular

SOP Examples for Lead tolerance data:

SOP65P490X110-8 rename to

SOP65P490X110-8_L38X68 = Lead size is 0.38 mm minimum and 0.68 mm

What other Radio buttons do you want (specifically list them for our programmers)?