From f14f89d03780e2e1b5d3577d874c154a584eb194 Mon Sep 17 00:00:00 2001 From: davor Date: Tue, 5 Jun 2018 12:18:35 +0200 Subject: [PATCH] readme update (removing production blues) --- README.md | 23 +++++++---------------- 1 file changed, 7 insertions(+), 16 deletions(-) diff --git a/README.md b/README.md index 43df77d..b4b86fb 100644 --- a/README.md +++ b/README.md @@ -105,22 +105,13 @@ Select [Mouser](http://www.mouser.com) language/location icon to PCBA manufactur country of origin and $-currency to check is PCBA manufacturer telling the truth about prices. -[PCBWAY](http://www.pcbway.com) produced [ULX3S v1.7 45F](/pic/ulx3sb-v17.jpg) in -December 2017 at above of CLASS 3 quality, $126 per -board. They produced [ULX3S v1.8 85F](/pic/ulx3sb-v18.jpg) in -May 2018. Boards look like on the edge of CLASS 1 quality acceptance -(drill randomness and copper layer -misaligment, [some holes have breakout near 180°](/pic/ulx3sb-v18-breakout-c19.png)), -while they claim it is still CLASS 2 compliant. -They charged $134 per board but agree to return money. [PCBWAY](http://www.pcbway.com) is -cheap at boards and assembly but -charged $40 for FPGA 85F chip which costed about $30 on [Mouser](http://www.mouser.com) at -that time. - -[PCBCART](http://www.pcbcart.com) would be my next choice because they -offer CLASS 3 quality and assembly at reasonable cost. Prices for the -parts are equal as from [Mouser](http://www.mouser.com) so total price per -board should be about the same as above. +Before soldering the parts, ask manufacturer for [pictures](/pic/ulx3sb-v18.jpg) of PCB. +CLASS 3 demands, among other things, that all drill holes stay inside of VIA pads. +If some holes [break-out](/pic/ulx3sb-v18-breakout-c19.png)) from pads, +ask manufacturer to make new PCBs with better drill and copper layer alignment. + +[PCBCART](http://www.pcbcart.com) offers CLASS 3 quality and assembly at reasonable cost. +Prices for the parts are equal to [Mouser](http://www.mouser.com). Don't pay everything at once. Following payment phases during the PCBA production are recommended: