Electronics Forum | Wed Sep 08 11:33:12 EDT 2021 | stephendo
Strange finish on the pads? So no solder left on the pad? Pad on the board or pad on the part? Does the jig go through the oven with the board? If so I would recommend sacrificing a board and drilling a hole in the bottom to have a thermocouple at th
Electronics Forum | Wed Sep 08 13:22:41 EDT 2021 | davef
Many pogo pins have a plating that may not solder well. The plating is intended to limit corrosion on the pogo pin from soldering flux. Back in the old days, they used gold. I have no idea of what they use now.
Electronics Forum | Wed Sep 08 19:58:17 EDT 2021 | kylehunter
Yes, we soldered some Mil-Max pins on a functional test board before. Utter nightmare. We managed to finally get them on, but yes, terrible wetting, and they act as total thermal sinks. Make sure to oversize you pads.
Electronics Forum | Fri Sep 10 01:11:32 EDT 2021 | Ran
Slanting Issues after reflow if u are using thru-hole type, u might need to define the slanting degree allowed during prototype. =)
Electronics Forum | Wed Sep 08 20:22:38 EDT 2021 | emeto
Hello, do you perform any stencil maintenance? What type of controls do you use? Also interested if you have a way to measure nano coating thickness? Any ideas will be appreciated.
Electronics Forum | Thu Sep 09 08:02:14 EDT 2021 | majdi4
Hello Evtimov , two parammeters must be controlled : 1) Frames tension must be controlled with tension meter ( attached photo ) 2)Also stencil thikness must be controlled with a Micro meter palmer
Electronics Forum | Thu Sep 09 12:56:39 EDT 2021 | emeto
Thank you for your reply Djo. What do you consider a normal range tension for 29" stencil on a hard frame? Also I am not sure how I can use micrometer in the middle of 29" stencil to measure the thickness? CAn you please clarify?
Electronics Forum | Thu Sep 09 18:02:42 EDT 2021 | emeto
Stencil thickness could be 3,4,5,6 mil but stencil is framed on 29 inch frame for SMT printer machine. I want to measure thickness in the center of this frame.
Electronics Forum | Thu Sep 09 20:48:12 EDT 2021 | laserstencils
I do not know of a way to measure the nano-coating. However, it is easy to check if it is still on the stencil. Simply use a 'sharpe' pen and try and mark the bottom (PCB) side near any openings. If it easily marks, then the nano is no longer present
Electronics Forum | Thu Sep 09 21:35:08 EDT 2021 | tey422
You don't really need to measure the center's thickness unless there is where the step up/down is at. As long as you can measure the the outer edge of the stencil, it would be the same thickness.
