EEVblog #1327 - 3 Ways to FAIL at PCB Manufacture - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: August 09, 2020, 07:17:20 am
content: Three ways to get your PCB design rejected by your PCB manufacturer.1) Imperial/Metric conversion2) Unexpected Trace/Space specifications3) Goofing the Gerber resolution.

author: BrianHG
author_rank: Super Contributor
timestamp: August 09, 2020, 08:53:25 pm
content: Arrrrrrggggg, a magical floating head which grows and shrinks depending on the speakers intonation...BTW, when placing or measuring objects in Altium, pressing the SHIFT or CTRL while moving the mouse enables/disables snap to edge, grid, or electrical grid. I wonder if it is the same in Kicad.

author: redshift
author_rank: Contributor
timestamp: August 09, 2020, 11:22:38 pm
content: I like the floating Dave head! Why waste the screen real estate on an entire rectangle?PS: You forgot to include the forum link in the video description.

author: EEVblog
author_rank: Unknown
timestamp: August 10, 2020, 12:37:58 am
content: Quote from: BrianHG on August 09, 2020, 08:53:25 pmALT works in KiCAD PCB but not in the KiCAD gerber viewer

author: Tek_TDS220
author_rank: Regular Contributor
timestamp: August 10, 2020, 01:26:15 am
content: The topic is great, very informative. As I've discovered, there are a lot of sneaky specs that can cause your boards to be rejected.Regarding the floating head, I like it. However, I found myself closing my door while I was watching.

author: jgruszynski
author_rank: Newbie
timestamp: August 10, 2020, 02:17:52 pm
content: Great video.We have a very similar but slightly more complicated design rule situation in IC design.

author: aheid
author_rank: Regular Contributor
timestamp: August 10, 2020, 03:50:54 pm
content: Floating head? How about some green facepaint next time. I want floating eyes and mouthNice video, had completely missed the gerber formatting options.

author: c64
author_rank: Frequent Contributor
timestamp: August 13, 2020, 03:14:17 am
content: Half of these clearance rules (like pad to pad) don't even exist on the JLC chinese website. Maybe they are just somebody's screw-up?https://www.jlc.com/portal/vtechnology.html

author: thm_w
author_rank: Super Contributor
timestamp: August 13, 2020, 08:13:03 pm
content: Quote from: c64 on August 13, 2020, 03:14:17 amMost of those measurements aren't even in metric as well.Stuff like pad to pad, for sure must be a recommendation and not an actual requirement, they will easily make stuff closer than that. Same with via to track vs PTH to track, literally the same thing but two numbers given.Maybe some of these restrictions they've added due to the large volume of orders and issues they ran into. The JLC china site works completely differently to the english version, so, could be different teams, etc.

author: VK3DRB
author_rank: Super Contributor
timestamp: August 16, 2020, 12:33:09 pm
content: Some of these manufacturers in Asia don't even bother stating their capabilities in metric, which I find annoying because there are only three other countries left in the world that still use imperial measurements mostly: Liberia and Myanmar and the USA. Seems like Me and Ma - and cousinGerberGoober - find this new fang dangled metric as confusin' as playing a banjo upside down.But I still use 0201, 0402, 0603, 0805 as definitions of component sizes because that is the common language used everywhere because there also is too much crossover between some imperial and some metric sizes. Also, when I say "mil", I mean millimetres. Thou is OK for imperial measurements, but not "mil" as it only causes confusion. I still am forced to use an imperial grid for schematics because most schematic symbols were created to an imperial grid. Nothing worse that when a symbol does not line up to a grid (2.50mm c.f. 2.54mm). Really Altium and the like should abandon measurements for grids and just use "units" as they are resized to A4 or A3 anyway when printing anyway.I remember in maths, rather that using pid/2 (ie: pi radians divided by 2), texts used pi/2 for 90 degrees which can cause confusion in some contexts.

author: VK3DRB
author_rank: Super Contributor
timestamp: August 16, 2020, 12:34:20 pm
content: Some of these manufacturers in Asia don't even bother stating their capabilities in metric, which I find annoying because there are only three other countries left in the world that still use imperial measurements mostly: Liberia and Myanmar and the USA. Seems like Me and Ma - and cousinGerberGoober - find this new fang dangled metric as confusin' as playing a banjo upside down.But I still use 0201, 0402, 0603, 0805 as definitions of component sizes as that is the common language used everywhere because there also is too much crossover between some imperial and some metric sizes. Also, when I say "mil", I mean millimetres. Thou is OK for imperial measurements, but not "mil" as it only causes confusion. I still am forced to use an imperial grid for schematics because most schematic symbols were created to an imperial grid. Nothing worse that when a symbol does not line up to a grid (2.50mm c.f. 2.54mm). Really Altium and the like should abandon measurements for grids and just use "units" becasue they are resized to A4 or A3 when printing anyway.I remember in maths, rather that using pid/2 (ie: pi radians divided by 2), texts used pi/2 for 90 degrees which can cause confusion in some contexts.

author: drcheap
author_rank: Newbie
timestamp: August 25, 2020, 09:16:43 pm
content: Am I the only one who's first thought, when I saw him moving his floating head around, was ...Mr. Sparkle!