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Post by scubalawyer on Jun 25, 2020 10:12:08 GMT -8
I was thinking a bit differently about it, though. How about a slightly flexible retainer that can be shoved over a piece of rubber sheet (like an o-ring, but flat), and then clamped with a stainless clamp? I like that idea too. Wish I had thought of it!
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Post by vance on Jun 25, 2020 14:41:35 GMT -8
Has anyone sent James the dimensions of the flange?
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Post by james1979 on Jun 25, 2020 14:45:03 GMT -8
Not yet, but no rush.
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Post by vance on Jun 25, 2020 15:36:10 GMT -8
OK, so the length of the flange is 52.74mm, width is 36.65mm, the straightish sections are approx 28mm, and the height is 5.21mm. There is a 0.65mm lip around the circumference. Here's a pic of the exhaust flange and exhaust horn assembly:
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dead_dog
Senior Diver
It's what we learn after we know it all that counts. John Wooden
Posts: 79
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Post by dead_dog on Jun 25, 2020 17:12:12 GMT -8
That'd be my friend Bill T. He's made many a diaphragm out of impregnated cloth, so he'd know. I just ordered some and will steal a pair of my wife's nylons to do some 'spearmintin". OMG ! The trouble you going to get in with that idea if you wife finds out.
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Post by james1979 on Jun 25, 2020 17:13:56 GMT -8
Cool... Hopefully I'll be able to spend some time on it tomorrow. Should be easy to model... getting a viable print is the real question! And I'm understanding 2 different ideas:
1) just a straight up printed diaphragm (I have my reservations about how well this will work due to the material).
2) A formed retainer ring with a lip, basically to hold nitrile glove material or the like in place and protect it from the clamp.
That sound about right?
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Post by scubalawyer on Jun 25, 2020 18:23:01 GMT -8
OMG ! The trouble you going to get in with that idea if you wife finds out. My wife willingly gave me a pair of support hose she had not worn in years and told me to go play with myself in my garage workspace. I am not sure what she meant by that!
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Post by james1979 on Jun 27, 2020 6:03:56 GMT -8
Looking at the TPU, and the design, I think I will have trouble getting a watertight part for the full diaphragm. I'll print one anyway and let someone who has a Healthways try it... I think the best bet is a collar to ease using nitrile glove material (ala SeaRat). Place a piece of glove over the opening, slide on the color, apply ziptie or clamp over the collar at your leisure. Let me know who the victim, I mean beta tester, is... I'll get one of each printed this weekend and hopefully in the mail monday. Respectfully, James
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Post by scubalawyer on Jun 27, 2020 7:31:06 GMT -8
Looking at the TPU, and the design, I think I will have trouble getting a watertight part for the full diaphragm. I'll print one anyway and let someone who has a Healthways try it... I think the best bet is a collar to ease using nitrile glove material (ala SeaRat). Place a piece of glove over the opening, slide on the color, apply ziptie or clamp over the collar at your leisure. Let me know who the victim, I mean beta tester, is... I'll get one of each printed this weekend and hopefully in the mail monday. Respectfully, James I vote to send it to Phil for eval.
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Post by SeaRat on Jun 27, 2020 17:16:06 GMT -8
Cool... Hopefully I'll be able to spend some time on it tomorrow. Should be easy to model... getting a viable print is the real question! And I'm understanding 2 different ideas: 1) just a straight up printed diaphragm (I have my reservations about how well this will work due to the material). 2) A formed retainer ring with a lip, basically to hold nitrile glove material or the like in place and protect it from the clamp. That sound about right? Yes. A flat collar that is slightly stretchy so it can be weaseled over the lip and then will destretch to fit tight-ishly around the flange. A flat clamp like I made would be best to hold that tight, rather than the wire, I think. The flat collar will help with both the installation of the rubber sheet, and would protect the sheet material from being cut by the clamp. Just one point, don't use sheet rubber. Use nitril or some synthetic, as the natural gum rubber we have in sheets will deteriorate pretty quickly in this environment. John
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Post by james1979 on Jun 27, 2020 17:47:50 GMT -8
Cool... Hopefully I'll be able to spend some time on it tomorrow. Should be easy to model... getting a viable print is the real question! And I'm understanding 2 different ideas: 1) just a straight up printed diaphragm (I have my reservations about how well this will work due to the material). 2) A formed retainer ring with a lip, basically to hold nitrile glove material or the like in place and protect it from the clamp. That sound about right? Yes. A flat collar that is slightly stretchy so it can be weaseled over the lip and then will destretch to fit tight-ishly around the flange. A flat clamp like I made would be best to hold that tight, rather than the wire, I think. The flat collar will help with both the installation of the rubber sheet, and would protect the sheet material from being cut by the clamp. Cool... First iteration is designed, I'll print it in the morning and get it headed your way Monday.
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Post by SeaRat on Jun 27, 2020 19:50:57 GMT -8
I just responded to this post on Facebook's page, Diving History, 1950-1990:
It looks like Mr. Pasigan will be sending me more information. I invited him to post here, but he did not seems to want to do that.
John
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Post by scubalawyer on Jul 5, 2020 21:53:56 GMT -8
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Post by vance on Jul 6, 2020 7:43:14 GMT -8
Nice work, Mark! Just think how many Scubas are out there that need your help. Better start buying them up!
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Post by scubalawyer on Jul 9, 2020 6:32:37 GMT -8
Update on the 3-D printed HW SCUBA exhaust diaphragm?
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