[PEDA] rectangle hole?
I'm creating a connector footprint with two rectangle holes or slots for mechanical stability. How do I create rectangle holes? Tim Fifield * Tracking #: F043784119037E49B6F4845F2C828DF67ED2F5AD * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] rectangle hole?
Use a rectangular drill. :) No really, you will need to define it as a routed hole in a mechanical note. I don't know of any PCB tool that can show rectangular holes and have the drill data mean something useful. I use a drill size of 1 mil and a note indicating that a slot is routed wherever they see a drill of 1mil. Since my places can't make a 1 mil hole, this flags an error and gets them to notice my special instructions. The automatically know which way to align the slot because the pad I use is rectangular. Yeah, maybe there are a few assumptions made, but people can do that when then actually think about something. -Original Message- From: Tim Fifield [mailto:[EMAIL PROTECTED]] Sent: Wednesday, July 31, 2002 9:26 AM To: Protel EDA Form Subject: [PEDA] rectangle hole? I'm creating a connector footprint with two rectangle holes or slots for mechanical stability. How do I create rectangle holes? Tim Fifield * Tracking #: F043784119037E49B6F4845F2C828DF67ED2F5AD * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] rectangle hole?
Re: [PEDA] rectangle hole?
Tim, I have done this many times and here is my methodology which typically relies on the fact that I use full fab drawings for production boards. For prototypes I will usually use a similar methodology which may simply rely on readme details or a gerber output layer that showers the extents of the slot/rectangle with respect to the board and the drill hole location. I may (recently I usually do it) also include the outline of the slot/rectangle on my board outline layer. I will use a pad (shape/size) doesn't really matter unless the slot/rectangle is to be plated. If it is to be plated then the pad shape will match the slot/rectangle shape plus the minimum annular ring width. The hole will be specified as 1 mil (can't be fab'ed). I will have a note and detail in the fab drawing which references the 1 mil drill size. The detail will dimension and orient the cutout to the center of the drill. If there are more than one slot/rectangle then I will use 2mil, 3mil, 4 mil drills sequentially as needed, all with notes and details covering the requirements. For prototypes the same is true except that I may not have generated the full fab drawing yet. I will have notes in my readme and some drawing/sketch/gerber showing the detailed dimensions and/or outline of the slot/rectangle. Note: discuss with your fabricator which router bit sizes they have available. Include and allow for the radius of the most suitable router bit in your details. Typically I have found the following sizes common with most fab shops, 0.094, 0.0625, and to a lesser degree 0.040, 0.031, rarely 0.020. Sometimes depending on the size of your rectangle and the available router bits, you will end up just leaving it as a round hole anyway. There may be no significant gain in squareness by routing with a bit that is on the big side for the rectangular hole size. To make sure that it gets done as you wish, just try to imagine all of the ways that it could be screwed up and then see if your notes/details clearly eliminate those possibilities for a common person reading those notes/details. Sincerely, Brad Velander. Lead PCB Designer Norsat International Inc. Microwave Products Tel (604) 292-9089 (direct line) Fax (604) 292-9010 email: [EMAIL PROTECTED] http://www.norsat.com -Original Message- From: Tim Fifield [mailto:[EMAIL PROTECTED]] Sent: Wednesday, July 31, 2002 9:26 AM To: Protel EDA Form Subject: [PEDA] rectangle hole? I'm creating a connector footprint with two rectangle holes or slots for mechanical stability. How do I create rectangle holes? Tim Fifield * Tracking #: C302270D2BE07F4B83AC9E45BDDA7F5B556EA26D * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] rectangle hole?
Tim- I use a method very similar to Mr. Velander with good results (ie, no calls from the Fab CAM operators). My Fab drawing is added to the Drill Drawing Layer so as to be included with the Drill Size listing, and is included with all jobs. A few notes: 1- Explicitly call out all hole sizes used as mechanical markers as Marker hole for Slots. Slots are xxMil wide NPT (or Plated). Hole center marks center of xxMil too used to rout slot. 2- If a fairly large routing tool is to be used, be sure to locate marker holes with an offset toward the center of the desired cutout to accommodate the radius of the tool and the clearance radius at the corner. This can be calculated from the tool diameter. If space is tight, you can request that the majority of the cutout be routed with say a 100Mil tool, and specify that the corners are to be routed to a smaller specified radius using say a 20 or 30Mil finish rout. This is far faster for the fab house. 3- I draw and dimension each cutout and notch explicitly on the Drill Drawing Layer to exactly indicate the desired feature. This is good backup info when using a multiplicity of marker hole sizes, as Protel isn't the greatest for checking hole sizes by selection. Some fab CAM operators prefer to work only from the dimensional drawing info only, as it allows them great freedom in tool and path selection. 4) Don't assume the fab house can't or won't drill a 1Mil hole. I had a call from an offshore house telling me that Laser-drilling the 1, 2, and 3Mil holes would take an extra day or two! I find a good rule of thumb is to specify _everything_, with wide but fixed tolerances for don't care items. The old USSR had the right idea: Anything not Required is Forbidden! Brian * Tracking #: 8992B0379032D04B9AEBCB5F6789C839B21EE559 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] rectangle hole?
Tim, Brian, with regard to the 1mil or other very small holes. One 'detail' that I left out, when the manufacturer reads the drill chart size or checks the symbol in the drill chart (my drill chart, not P99SE's automated one) they find a note directing them to the appropriate fab note and detail drawing, rather then the 1mil or other size listing. One could also edit your drill file to remove those tools completely but that is opening you up to human errors and the drill will not show at all in their CAM software and could be overlooked. Brian, was this manufacturer pulling your leg? I haven't heard of any PCB laser holes smaller than 3 mils before, let alone from a Chinese shop. The hole may be possible but properly plating it for electrical conductivity would be the problem. Sincerely, Brad Velander. Lead PCB Designer Norsat International Inc. Microwave Products Tel (604) 292-9089 (direct line) Fax (604) 292-9010 email: [EMAIL PROTECTED] http://www.norsat.com -Original Message- From: Brian Sherer [mailto:[EMAIL PROTECTED]] Sent: Wednesday, July 31, 2002 12:44 PM To: Protel EDA Forum Subject: Re: [PEDA] rectangle hole? Tim- I use a method very similar to Mr. Velander with good results (ie, no calls from the Fab CAM operators). My Fab drawing is added to the Drill Drawing Layer so as to be included with the Drill Size listing, and is included with all jobs. A few notes: 1- Explicitly call out all hole sizes used as mechanical markers as Marker hole for Slots. Slots are xxMil wide NPT (or Plated). Hole center marks center of xxMil too used to rout slot. 2- If a fairly large routing tool is to be used, be sure to locate marker holes with an offset toward the center of the desired cutout to accommodate the radius of the tool and the clearance radius at the corner. This can be calculated from the tool diameter. If space is tight, you can request that the majority of the cutout be routed with say a 100Mil tool, and specify that the corners are to be routed to a smaller specified radius using say a 20 or 30Mil finish rout. This is far faster for the fab house. 3- I draw and dimension each cutout and notch explicitly on the Drill Drawing Layer to exactly indicate the desired feature. This is good backup info when using a multiplicity of marker hole sizes, as Protel isn't the greatest for checking hole sizes by selection. Some fab CAM operators prefer to work only from the dimensional drawing info only, as it allows them great freedom in tool and path selection. 4) Don't assume the fab house can't or won't drill a 1Mil hole. I had a call from an offshore house telling me that Laser-drilling the 1, 2, and 3Mil holes would take an extra day or two! I find a good rule of thumb is to specify _everything_, with wide but fixed tolerances for don't care items. The old USSR had the right idea: Anything not Required is Forbidden! Brian * Tracking #: AF28B060D9DDD74E84E790F4833687001B76C65C * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] rectangle hole?
Brad- The 1mil shop was located in Europe. They claimed to be doing precision fab at die level, so may have been sputtering the plating (or some other James Bond type method). Needless to say, their quote was astronomical and went directly to the circular file As the old saying goes, Be careful what you wish for... you may get it! Brian * Tracking #: 3F3F763F590F2C4DA00CD6047FA30842EA6A2AA9 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Re: [PEDA] rectangle hole?
Tim, if you use those holes just for the mechanical fixing points, you can create them by using Fills in the footprint. If you want to plate them through, there are some PCB manufacturers doing it on request. If you want to create them as pads, that is not possible. You will have to wait until DXP SE(sixth edition). Igor -Original Message- From: Tim Fifield [mailto:[EMAIL PROTECTED]] Sent: Thursday, 1 August 2002 2:26 AM To: Protel EDA Form Subject: [PEDA] rectangle hole? I'm creating a connector footprint with two rectangle holes or slots for mechanical stability. How do I create rectangle holes? Tim Fifield * Tracking #: F043784119037E49B6F4845F2C828DF67ED2F5AD * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
