RAVEL DRC Programming for IC Packaging and PCB - Recent Threads

Download Ravel Standard Library

shawnpatel — Thu, 08 Sep 2022 18:40:00 GMT

Where can I download the Ravel Stardard Library? I see how to install it once the software package is downloaded, but where is the software package hosted?

fiducial holes creation

babu pcb — Tue, 11 Dec 2018 10:12:26 GMT

hi to all ,how to create fiducial symbols in allegro,i am new to allegro and i got stuck in fiducial symbol creation.is fiducial symbols are created using mechanical symbol option?or not.if it is right then how to give copper pad and clearance to the circles.

Ravel DRC makrer on dielectric layer

Ze Lyu — Tue, 26 Jun 2018 17:55:27 GMT

I am trying to write some DRC script for vias(drills) in different dielectric layers. However, I am not able to place the DRC makers on the dielectric layers where the targeted via drills locate. I only know how to place them in conductor layers or just by default, through all layers. but that's not what I wanted at all. Is there anyway to accomplish this?

Thanks,

May the force be with y'all,

Zee

How Can I Get the Max. Length of all wires on a design ?

Kenjung Chang — Fri, 30 Mar 2018 07:14:32 GMT

How Can I Get the Max. Length of all wires on a design ?
the (max) function only judges two numbers, but I have to get the max. value of a relation.

(transform (w) wire (w (length w)))

Setup RAVEL

comet — Fri, 24 Feb 2017 02:48:33 GMT

Hi Guys,

I couldn't run RAVEL under Allegro PCB Designer Manufacture tab. It prompted "Environment Variable DFM_RAV_PATH is not set. Please set it to the correct path and try again."

Please let me know how.

Thanks! ;-)

Best way to determine pad pitch

GMaggy — Wed, 11 May 2016 14:16:34 GMT

What is the best way to find the pad pitch when the design has 27000+ pads? Using the (combine relation1 relation2) operator crashes my session as Ravel attempts to store 729 million+ combinations. Even if I break the design into quadrants to reduce the number of pads being looked at, Ravel still has to deal with 48 million+ combinations. Also, looking only at the pads nearest the design edge doesn't give me the result I'm looking for. I need to find the minimum pad pitch in the design.

Do you have any suggestions?

Ravel EXIT Command?

Rian — Wed, 21 Oct 2015 13:13:45 GMT

Can you exit out of a .RAV file early? i.e. If some shape is NOT found we currently report that error (and add a DRC in the center) but then we do NOT want to continue the rest of the file. This is usually because the rest of the file will add more erroneous DRC markers and we just want to quit and tell the designer to fix the shape first.

How to define ballpads

Nealb — Tue, 13 Oct 2015 14:25:45 GMT

We would like to write some Ravel programming to measure solder ball to package edge and I am unable to define ballpad and obtain a relation. Is there somehow to do this?

Thanks

How do I search Symbols by name?

Rian — Tue, 15 Sep 2015 20:35:38 GMT

Our diagrams should have certain "mechanical" symbols but Ravel does not have a "symbol" built-in relation. I know it has a shape relation but this does not have a component_name?

I guess the easy question is how do I find this iron man fiducial?...

Here's the code that fails:

(define FiducialIM
    (select (mSymbol) shape ; NO symbols relation :(
        component_name?(mSymbol, "IRON_MAN_BOC")
    )
)

P.S. I am told by the designers we can't make these symbols components because they are mechanical only.

How to check the of a line?

Rian — Tue, 08 Sep 2015 15:04:23 GMT

How do I check the < NAME > name of line? Is there a line_refdes like component_refdes? Something like:

(define PlatingTrace
(select (mPlatingTrace) line
(ZZZZZZ_refdes? mPlatingTrace "HORIZONTAL LINE SEGMENT"))

(layer? mPlatingTrace "SUBSTRATE GEOMETRY/UNITBOT_PLTG_PU")
)

THANKS, RIAN

How do I get a line's Angle?

Rian — Tue, 08 Sep 2015 13:35:30 GMT

How to you get at the angle of a line in Ravel land? Here's a snapshot of what I am after. We need to make sure the line is around 30 degrees. i.e. Between MIN=29.9 and MAX=30.1

How to measure max Y axis of a polygon

Rian — Mon, 31 Aug 2015 19:30:34 GMT

Is there a way to get the max and min Y coordinates of a polygon so we can just subtract them to get the Y-axis height (in microns for us).

Here's a picture. We called the layer_andnot function to get just the tip as show here:

Using ravCheckAndReport with multiple generic rule decks

GMaggy — Tue, 03 Mar 2015 19:32:43 GMT

How do I use the ravCheckAndReport command to evaluate multiple generic rule decks using a single control file? I was able to do this using earlier versions of Ravel prior to 2.18. However, with the check that was added to Ravel version 2.18 that raises an error when a control file lists rules that do not exist in the rule deck, this method no longer works? Is this even possible anymore?

For example:

ravCheckAndReport(list("path_to_die.ravge" "pad_size.ravge" "sm_opening.ravge") ?tag nil ?control "my_control_file.ravgc")

now throws an error:

E- *Error* Checks in control file not matched by rules in deck: ((check ("Path to Die" "Path to Die Edge Distance")) (check ("Pad Size" "Pad Width")) (check ("Pad Size" "Pad Length")) (check ("SM Opening" "SM Opening")))

Ravel IDE

michd — Wed, 05 Mar 2014 05:47:43 GMT

Hi there,

I come from web devel, with some tcltk, vb, and I've been using NETBEANS IDE for years (come from Eclipse).

I'm new to ravel coding, and I've started using Cadence Vier, for ravel interactive window feature . But I would like to use project management / subversion integration / syntax colorization-completion / ... right on Netbeans ide which integrate perfectly in my company here.

so is there a plan to develop a Ravel plug-in for netbeans in the future ? ( a java development in fact)

regards

Michel

How to Automate (batch) the Ravel run from Constraint Manager

AlexeyG — Wed, 27 Nov 2013 07:32:28 GMT

Hello,

Is there a way to run ravel from Constraint Manager in a batch mode (for example for the regression test needs) ?

Thanks in advance,

Alexey.

Constants defined n Ravel?

Martin Biehl — Thu, 08 Aug 2013 03:48:54 GMT

Is there a way to define constants in Ravel? I have some numbers that I would like to define in one place for use in the code. They are not constraints so I do not want to define them as such since that would make it possible to change the values.

More descriptive DRC violation datatip for Ravel DRCs

Bjoern L — Mon, 05 Aug 2013 13:04:53 GMT

By default, the tooltip that pops up when you hover the mouse pointer over a Ravel DRC violation in the design window does not show the Ravel violation description, but the for Ravel purposes rather less descriptive text "Externally Determined Violation". This is however possible to customize: in the menu select Setup -> Datatip Customization... to bring up the datatip customization dialog and select DRC in the Object Type list. To display the Ravel violation description, select the Advanced tab and check the Value and Save boxes of Ravel_Marker_Description. To not display "Externally Determined Violation", uncheck the Value box of Name on the General tab. Click OK, and you will see that your Ravel DRC violation tooltips have now become much more descriptive.

Welcome to the RAVEL forum!

admin — Thu, 01 Aug 2013 19:19:01 GMT

This forum is intended as a meeting place for discussions and exchanges on the broader theme of writing programs in the RAVEL DRC language for IC packaging and PCB. Topics related to the RAVEL engine and compiler, or how RAVEL integrates and is used in an environment or flow are also welcome.

This is the place to ask questions or share ideas with other RAVEL users.