Electronics Forum | Tue Feb 25 06:06:11 EST 2020 | hexton
I am currently weighing up my options for resistors that will be fitted to a fully assembled PCB (PTH&SMT). Do I omit the stencil apertures leaving exposed pads (ENIG) so they can be hand soldered with fresh solder. Considering shelf life for soldera
Electronics Forum | Thu Feb 27 08:59:15 EST 2020 | spoiltforchoice
In both cases, it will depend on storage conditions, unless you do something horrible to them (or as previously mentioned, wash them) months & months. For boards we put through SMT and then stash for THT loading in smaller qty's I don't think we've e
Electronics Forum | Mon Aug 24 21:16:57 EDT 2020 | smith88
I am trying to teach a class and the question came up about loss of metalization of the Earth pad on a chip filter. This pad is on the side of the component. I can not find a IPC call out for this type of side termination other than 3 or 5 sided 9.1.
Electronics Forum | Thu Sep 17 15:21:50 EDT 2020 | lpbro
For height, I start +-2mil usually. For 3mil stencils, my lower limit starts at 1.5mil, upper is 5. If the area is chem ethed, I normally add .5 to the stencil height. My default volume is 60 - 160%. Then print specs are adjusted till I see fit, then
Electronics Forum | Thu Nov 19 11:50:18 EST 2020 | aurash
Sarason - I can do that (did before) but you need an exact HDD model for the transplant which challenging to find (10 Years old) - but I appreciate your answer. I got an old HDD (from another machine) and made a mirror on a brand new one and fitted
Electronics Forum | Wed Apr 13 12:39:20 EDT 2022 | SMTA-64386699
We produce some heavy copper multi-layer boards. 4-6 layer typ with 3oz throughout. WE currently are using a Heller 1912EXL with belt speed around 32-36 in/min. I am looking to replace this oven with a more efficient unit. To the best of my knowledg
Electronics Forum | Sun Apr 17 00:04:03 EDT 2022 | klauss
I am mounting 3535 Cree High-power leds with p&p machine. First nozzle picks up the led normally and then it's placed good but after 4-5 times nozzle picks up the led like at an angle. looks like it holds the led from the side edge of the dome.
Electronics Forum | Mon Nov 14 09:12:24 EST 2022 | kutayuysal
My company would like to invest and SMT Line boards. Boards are simple for P&P machines, couple of 603 and 402 components which most of machines are capable to place. Challenging part is Pin-in-Paste terminals. Those terminals produce with metal stri
Electronics Forum | Thu Mar 23 04:44:46 EDT 2023 | gwideman
We are looking to obtain (probably make) the calibration tools used in the camera calibration procedures. To that end, any photos and dimensions would be highly appreciated! The set consists of one or two plates and a hat that fits on the up camer
Electronics Forum | Mon Sep 11 08:22:56 EDT 2023 | richardcargill
A lot of MELF components have solder ends that stand slightly proud of the main body where your vacuum would lift them, so vacuum leaks are most likely the culprit. Upping the Vacuum to the nozzle may help, but better thing would be to modify the noz
