Skip to main content
17 events
when toggle format what by license comment
Oct 21, 2015 at 22:33 answer added Daniel timeline score: 2
Oct 21, 2015 at 21:37 answer added HighInBC timeline score: 1
Oct 21, 2015 at 1:25 comment added BenG also. can you take a close up picture of a crimped wire outside the connector?
Oct 20, 2015 at 22:12 comment added BenG @Skaevola Specific product recommendations are against the rules. But looking at the crimp terminals you have linked. They really should be fine. If the insulation is gripped properly. ie physically deformed by the wings when they fold around there should be no stress at all on your bare strands. It may be your crimper is faulty? If it is not crimping hard enough try using a pair of needle nose to finish it off. As a stress test you can do one wire and suspend it from the crimp pin with a weight tied on the other end and swing it like a pendulum. If it survives you shoukd be ok.
Oct 20, 2015 at 14:45 comment added Skaevola @BenG do you have any recommendations for small connectors (~1mm pitch) that have built in strain relief?
Oct 20, 2015 at 14:44 comment added Skaevola @ScottSeidman I am using the proper crimp tool and the connector inserts are grabbing the insulation when I crimp them.
Oct 19, 2015 at 21:48 comment added Scott Seidman Are you using a legit crimp tool, which should grab insulation as well as conductor? My experience with the smaller Molex pin inserts is that you have best success using the right tool for the right job.
Oct 19, 2015 at 20:51 comment added BenG @I.Wolfe A variation on I.Wolfe's method is to drill through the pcb and loop a thin tie wrap/zip tie through the board and around the bundle. This has the advantage of easier field/workshop repair. But really your best ootion is to switch to a connector with in built strain relief.
Oct 19, 2015 at 20:21 comment added I. Wolfe End goal is to get the strain on the insulated portion of the wire, and away from where it crimps into the contact. Where it crimps into the connector, it has NO insulation, and is therefore much weaker, since it only has some really thin copper strands holding it in place. If you put up picture of the hot glue job, I could tell you if it looks good.
Oct 19, 2015 at 20:16 comment added I. Wolfe Ah yeah, the AWG of the wire is so small that the strands break under the strain too easily. You need to secure the wire somehow, behind the connector. Hot glue should work. The issue is that the wire is breaking where the insulation is stripped, so the strands are the only thing taking the strain. If you hot glue the wire back away from the connector so the strain is on insulated wire instead, it should help stop this issue. The only other method I can think of would be to tie the wire down somehow. So you would plug the connector in, and then tie the wire to whatever the connector plugs into
Oct 19, 2015 at 20:12 comment added Skaevola @I.Wolfe I added two pictures to the question which show what I mean by the wire coming out of the connector. It looks to me like the wires are breaking right at the point where they meet the connector (and there is still part of the wire left in the crimp insert when this happens). I tried tcrosley's solution of adding hot glue this morning, but it looks to me like the issue will remain just now at the location where the wire meets the glue. I have ordered some silicone to try the same idea with a material that is less hard than the hot-glue.
Oct 19, 2015 at 20:07 history edited Skaevola CC BY-SA 3.0
added 194 characters in body
Oct 19, 2015 at 19:31 comment added I. Wolfe That is odd that you have wires popping out. Do you mean the wires are coming out of the crimp contact? I've never had this issue with properly crimped picoblade connectors. One thing I have done on a board before is drill 2 small holes on the board with the connector, and tie the wire down with bare wire. It's nothing fancy, but worked for the strain relief I needed on 3 conductor 26 AWG wire. I use hot glue as tcrosley mentioned when I'm making test wiring that should never be unplugged and receives lots of abuse in manufacturing.
Oct 19, 2015 at 17:57 review Close votes
Oct 22, 2015 at 4:19
Oct 19, 2015 at 17:55 comment added tcrosley If the connectors never need to be disconnected, can you cover them with hot glue?
Oct 19, 2015 at 17:07 history edited Skaevola CC BY-SA 3.0
added 6 characters in body
Oct 19, 2015 at 16:51 history asked Skaevola CC BY-SA 3.0