valerun
Well-known member
jclemens said:Joel - I think 2 mods need to be made:
1. The wall of the crimp section is too thick - probably needs to be 2/3rds of what it is now. I haven't tried crimping it yet but looks very formidable now.
2. The length of the crimp section is too short - all the lugs / anderson connector pins of this size have at least 1.5" long crimp sections. I suggest we do the same. Right now, it's only 1/2" or so - this is insufficient for a high-quality crimp I think - and definitely not enough for a double-crimp.
Is it possible for you to make these mods to Shapeways set?
The cable end of the pin was a design copy of what I used for the manually built pins.
I measured with calipers the butt-splice I used. Digikey PN WM2973-ND
The depth and wall thickness should be the same (for one side since it is for a pin, not a splice)
This can be used with 2 kinds of crimpers, one is a proper one, but costs over 3000$, the other is a hammer kind, it is only ~50$
The one thing I wasn't sure about is how hard the silver will be compared to the butt-splice which is made from some kind of tinned copper alloy.
I will update the pins to have a thinner wall and deeper pocket (1.5" deep), but please give me some dimensions on how thick the outer wall should be.
Also, how about making the pin itself a little hollow to save on silver? (Just adding a cone shaped recess about half way down) Of course the wall thickness of the pin will have priority. The conductivity of solid silver is just so overkill.
How about shapeway's tolerance? where they able to get close enough to 9.0mm in diameter?
I'll update the shapeways file to v4.1
Thanks Joel - let's do 3/4th of the thickness we have now and 1.5" long crimp area.
I will crimp these today and will confirm 3/4th number above.
Valery