Cracks PRISM head

dive2dive2000 · 20th November 2005, 04:00

Matt,

I know for the PRISM there is an expoxy that is used when people crack there heads. I do not know if it would work on Delrin, I do not think a PRISM head is of the same material as a Meg. If you would like some, PM me and I am sure I can mail you some.

marty

abowie · 20th November 2005, 04:05

Quote: (Originally Posted by dive2dive2000)

Matt,

I know for the PRISM there is an expoxy that is used when people crack there heads.

Nice to see that it happens regularly enough that there is an accepted repair technique.

***caveseeker7*** · 20th November 2005, 04:17

Needs some pretty high force to break the head. I've seen a few, always the wings (that mount the head to the board). Those don't cause leaks and can be fixed.

The only exception was that annihilated head from Oz, though I saw only pictures of that one.

No Delrin in the PRISM that I know of, Marty.

dive2dive2000 · 20th November 2005, 04:31

Quote: (Originally Posted by abowie)

Nice to see that it happens regularly enough that there is an accepted repair technique.

Yes you would be suprised how many morons

drop there heads off of work benches.

**Steve** · 20th November 2005, 06:24

Quote: (Originally Posted by dive2dive2000)

Matt,

I know for the PRISM there is an expoxy that is used when people crack there heads. I do not know if it would work on Delrin, I do not think a PRISM head is of the same material as a Meg. If you would like some, PM me and I am sure I can mail you some.

marty

Thankfully the Prism and the Meg's heads are made from different material. I held a Prism head yesterday that had more cracks than a plumber’s convention. The owner couldn't be bothered sending it back to the Orchard TM anymore. That stuff doesn’t need to be dropped far to break, it is way too brittle. Is it the same material as the DSV?

BTW I don’t think the Meg is made from Delrin but rather another tougher form of acetyl

silent running · 20th November 2005, 07:50

Quote: (Originally Posted by Steve)

Thankfully the Prism and the Meg's heads are made from different material. I held a Prism head yesterday that had more cracks than a plumber’s convention. The owner couldn't be bothered sending it back to the Orchard TM anymore. That stuff doesn’t need to be dropped far to break, it is way too brittle. Is it the same material as the DSV?

BTW I don’t think the Meg is made from Delrin but rather another tougher form of acetyl

Hello Steve, where were the cracks exactly? I've never had any on mine and it's seen some hard use. My battery/cal cap has some pitting on the outside, but nothing that would affect the seal. I think that the Meg and Prism heads would have to be made from different materials as the potted Prism SP controller/computer is molded into the head in one piece as opposed to the Meg which is machined and the various components are fitted together inside the head/housing. Is this correct? I'm not sure about whether or not the Prism DSV is different material from the head. It is very hard and it feels like different material though. Mine shows no signs of wear at all.-Andy

dive2dive2000 · 20th November 2005, 17:18

Quote: (Originally Posted by Steve)

Thankfully the Prism and the Meg's heads are made from different material. I held a Prism head yesterday that had more cracks than a plumber’s convention. The owner couldn't be bothered sending it back to the Orchard TM anymore. That stuff doesn’t need to be dropped far to break, it is way too brittle. Is it the same material as the DSV?

BTW I don’t think the Meg is made from Delrin but rather another tougher form of acetyl

Steve,

How did the head receive all of these cracks? I was under the impression that some units that were sent to Australia that were defective, so in your case it really is not the norm. Is a poured or injection mould as strong as a machined acetyl, I do not think so, but I do not know to be honest so my opinion is irrelevant. The materials that are used in Rebreathers (no matter what make) are the strongest and most practicable and affordable materials available. Unfortunately they are not 100% bullet proof, shit does happen One diver drops his unit more than once over 3' onto hard concrete not a scratch, another diver bumps in and out of his car several 100 times lives in a climate with 100 degree + weather and all of a sudden, 3+ yrs later a stress crack

Go figure

***caveseeker7*** · 20th November 2005, 20:28

Martin, since Steve is in WA it's a safe asumption he's either refering to Craig or Karl's head. One is original, they both have single digit serial numbers. The other was replaced a while back, so I don't know which version of the head is on it. The original head that was replaced is still at SMI, got fixed and sees ocasional use as a spare head.

Anyway, both rigs were extensively used for caving, including hauling them across sumps. Without cowlings, at least early on. I seem to recall something about hitting the cave ceiling while scootering ...

Read about their exploration at www.trimixdivers.com

dive2dive2000 · 20th November 2005, 22:23

Quote: (Originally Posted by caveseeker7)

Martin, since Steve is in WA it's a safe asumption he's either refering to Craig or Karl's head. One is original, they both have single digit serial numbers. The other was replaced a while back, so I don't know which version of the head is on it. The original head that was replaced is still at SMI, got fixed and sees ocasional use as a spare head.

Anyway, both rigs were extensively used for caving, including hauling them across sumps. Without cowlings, at least early on. I seem to recall something about hitting the cave ceiling while scootering ...

Read about their exploration at www.trimixdivers.com

Stefan,
I was assuming AUS because of his Avatar

**Steve** · 20th November 2005, 23:02

Quote: (Originally Posted by dive2dive2000)

Stefan,
I was assuming AUS because of his Avatar

Oh dear

20th November 2005, 04:00	#1 (permalink)
dive2dive2000 PRISM DIVER & LUVIN IT! Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Feb 2005 Location: Long Island, NY Posts: 788	Re: Stress Crack in Meg lid Matt, I know for the PRISM there is an expoxy that is used when people crack there heads. I do not know if it would work on Delrin, I do not think a PRISM head is of the same material as a Meg. If you would like some, PM me and I am sure I can mail you some. marty __________________ Safe Diving, Martin
(Offline)

20th November 2005, 04:05	#2 (permalink)
abowie Fighting Girl Current Rebreather/s: Sport Kiss Other Rebreather/s: Join Date: May 2005 Location: Land of Oz Posts: 574	Re: Stress Crack in Meg lid Quote: (Originally Posted by dive2dive2000) Matt, I know for the PRISM there is an expoxy that is used when people crack there heads. Nice to see that it happens regularly enough that there is an accepted repair technique. __________________ Andrew Bowie Rebreather-friendly Buddy
(Online)

20th November 2005, 04:17	#3 (permalink)
*caveseeker7* Who loves ya, baby Current Rebreather/s: Sport Kiss Other Rebreather/s: Prism Topaz Join Date: Jan 2005 Location: Too far from Neverland Posts: 5,451	Re: Stress Crack in Meg lid Needs some pretty high force to break the head. I've seen a few, always the wings (that mount the head to the board). Those don't cause leaks and can be fixed. The only exception was that annihilated head from Oz, though I saw only pictures of that one. No Delrin in the PRISM that I know of, Marty. __________________ Cheers Stefan "Political Correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.!"
(Offline)

20th November 2005, 04:31	#4 (permalink)
dive2dive2000 PRISM DIVER & LUVIN IT! Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Feb 2005 Location: Long Island, NY Posts: 788	Re: Stress Crack in Meg lid Quote: (Originally Posted by abowie) Nice to see that it happens regularly enough that there is an accepted repair technique. Yes you would be suprised how many morons drop there heads off of work benches. __________________ Safe Diving, Martin
(Offline)

20th November 2005, 06:24	#5 (permalink)
Steve Ladies bring a plate Current Rebreather/s: Megalodon Home Build Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Classic Kiss MK 15.X Home Build Join Date: Feb 2005 Location: Perth - Australia Posts: 1,117	Re: Stress Crack in Meg lid Quote: (Originally Posted by dive2dive2000) Matt, I know for the PRISM there is an expoxy that is used when people crack there heads. I do not know if it would work on Delrin, I do not think a PRISM head is of the same material as a Meg. If you would like some, PM me and I am sure I can mail you some. marty Thankfully the Prism and the Meg's heads are made from different material. I held a Prism head yesterday that had more cracks than a plumber’s convention. The owner couldn't be bothered sending it back to the Orchard TM anymore. That stuff doesn’t need to be dropped far to break, it is way too brittle. Is it the same material as the DSV? BTW I don’t think the Meg is made from Delrin but rather another tougher form of acetyl __________________ WARNING: I contain occasional coarse language, extreme sexual references, nudity, and adult themes, which may offend some people - Usually churchy types. Last edited by Steve : 20th November 2005 at 06:35.
(Online)

20th November 2005, 07:50	#6 (permalink)
silent running Mature mouth breather Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Jun 2005 Location: U.S.A. Brooklyn, New York Posts: 1,832	Re: Stress Crack in Meg lid Quote: (Originally Posted by Steve) Thankfully the Prism and the Meg's heads are made from different material. I held a Prism head yesterday that had more cracks than a plumber’s convention. The owner couldn't be bothered sending it back to the Orchard TM anymore. That stuff doesn’t need to be dropped far to break, it is way too brittle. Is it the same material as the DSV? BTW I don’t think the Meg is made from Delrin but rather another tougher form of acetyl Hello Steve, where were the cracks exactly? I've never had any on mine and it's seen some hard use. My battery/cal cap has some pitting on the outside, but nothing that would affect the seal. I think that the Meg and Prism heads would have to be made from different materials as the potted Prism SP controller/computer is molded into the head in one piece as opposed to the Meg which is machined and the various components are fitted together inside the head/housing. Is this correct? I'm not sure about whether or not the Prism DSV is different material from the head. It is very hard and it feels like different material though. Mine shows no signs of wear at all.-Andy
(Offline)

20th November 2005, 17:18	#7 (permalink)
dive2dive2000 PRISM DIVER & LUVIN IT! Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Feb 2005 Location: Long Island, NY Posts: 788	Re: Stress Crack in Meg lid Quote: (Originally Posted by Steve) Thankfully the Prism and the Meg's heads are made from different material. I held a Prism head yesterday that had more cracks than a plumber’s convention. The owner couldn't be bothered sending it back to the Orchard TM anymore. That stuff doesn’t need to be dropped far to break, it is way too brittle. Is it the same material as the DSV? BTW I don’t think the Meg is made from Delrin but rather another tougher form of acetyl Steve, How did the head receive all of these cracks? I was under the impression that some units that were sent to Australia that were defective, so in your case it really is not the norm. Is a poured or injection mould as strong as a machined acetyl, I do not think so, but I do not know to be honest so my opinion is irrelevant. The materials that are used in Rebreathers (no matter what make) are the strongest and most practicable and affordable materials available. Unfortunately they are not 100% bullet proof, shit does happen One diver drops his unit more than once over 3' onto hard concrete not a scratch, another diver bumps in and out of his car several 100 times lives in a climate with 100 degree + weather and all of a sudden, 3+ yrs later a stress crack Go figure __________________ Safe Diving, Martin
(Offline)

20th November 2005, 20:28	#8 (permalink)
*caveseeker7* Who loves ya, baby Current Rebreather/s: Sport Kiss Other Rebreather/s: Prism Topaz Join Date: Jan 2005 Location: Too far from Neverland Posts: 5,451	Re: Stress Crack in Meg lid Martin, since Steve is in WA it's a safe asumption he's either refering to Craig or Karl's head. One is original, they both have single digit serial numbers. The other was replaced a while back, so I don't know which version of the head is on it. The original head that was replaced is still at SMI, got fixed and sees ocasional use as a spare head. Anyway, both rigs were extensively used for caving, including hauling them across sumps. Without cowlings, at least early on. I seem to recall something about hitting the cave ceiling while scootering ... Read about their exploration at www.trimixdivers.com __________________ Cheers Stefan "Political Correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.!"
(Offline)

20th November 2005, 22:23	#9 (permalink)
dive2dive2000 PRISM DIVER & LUVIN IT! Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Feb 2005 Location: Long Island, NY Posts: 788	Re: Stress Crack in Meg lid Quote: (Originally Posted by caveseeker7) Martin, since Steve is in WA it's a safe asumption he's either refering to Craig or Karl's head. One is original, they both have single digit serial numbers. The other was replaced a while back, so I don't know which version of the head is on it. The original head that was replaced is still at SMI, got fixed and sees ocasional use as a spare head. Anyway, both rigs were extensively used for caving, including hauling them across sumps. Without cowlings, at least early on. I seem to recall something about hitting the cave ceiling while scootering ... Read about their exploration at www.trimixdivers.com Stefan, I was assuming AUS because of his Avatar __________________ Safe Diving, Martin
(Offline)

20th November 2005, 23:02	#10 (permalink)
Steve Ladies bring a plate Current Rebreather/s: Megalodon Home Build Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Classic Kiss MK 15.X Home Build Join Date: Feb 2005 Location: Perth - Australia Posts: 1,117	Re: Stress Crack in Meg lid Quote: (Originally Posted by dive2dive2000) Stefan, I was assuming AUS because of his Avatar Oh dear __________________ WARNING: I contain occasional coarse language, extreme sexual references, nudity, and adult themes, which may offend some people - Usually churchy types.
(Online)

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