Timeline for Maximum protusion length for through-hole component pins
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 15, 2015 at 2:26 | comment | added | Joe Baker | Yes, that's the rough idea. The sensor shape allows for a O-ring on a lip 5mm up from the base of the sensor and it gets sealed there instead of at the base of the PCB. | |
| Feb 14, 2015 at 22:04 | comment | added | Dwayne Reid | @Ignacio Vazquez-Abrams: I specified plated-through holes because I have seen boards that do in fact have PTH but have copper on only one side. No traces, no pads. Just holes. Early model-aircraft servos, if I recall correctly. | |
| Feb 14, 2015 at 22:01 | comment | added | Dwayne Reid | I don't know all the details of what you are trying to accomplish, but my first thought is to stuff and solder everything except the sensor, sand the board, mount the sensor, then use a gasket to provide a seal from the board to the plastic block. Gasket could be foam tape or a bit of silicone sealant or whatever. | |
| Feb 14, 2015 at 22:00 | comment | added | Joe Baker | It's machined Delrin and yes, very low volume. I just added the material to the question. | |
| Feb 14, 2015 at 21:56 | comment | added | Warren Young | @JoeBaker: Are we to take it that this is a low-volume production, since you speak of machining plastic? If this were molded plastic, the extra machining steps in making the mold would pretty much disappear at volume. | |
| Feb 14, 2015 at 21:55 | comment | added | Joe Baker | Given that I'm only looking at a handful of simple components (guessing 17 pins total on that side of the board), what do costs look like for planing the board as opposed to the extra machining on the mounting block? | |
| Feb 14, 2015 at 21:24 | comment | added | Warren Young | @IgnacioVazquez-Abrams: Not necessarily. Only one side of the board needs planing in the OP's application. You can load the bottom-side components, wave-solder them, plane the top side of the board, then proceed with the remaining assembly steps. All this increases cost, of course, but it may be necessary. | |
| Feb 14, 2015 at 21:11 | comment | added | Ignacio Vazquez-Abrams | And single-sided, of course. | |
| Feb 14, 2015 at 21:10 | history | answered | Dwayne Reid | CC BY-SA 3.0 |