Mutli strand vs single core fiber

[coweyman]

For the fiber optic cords on strobes. I have been seeing some are multi strand and others are a single thicker strand. Which is better or would one work and one not work

[Dave_Hicks]

Both work if we are talking about glass fiber. Multi-strand is better as it is more durable with a tighter bend radius. Less likely to break or fail.

[bvanant]

I am pretty sure that all of the multi-strand fiber is in fact PMMA (the Asahi 613 core certainly is). As Dave points out, the 613 core has a minimum bend radius of 1 mm or so while a 2 mm single fiber has a bend radius of like 25 mm or so.

Bill

[hellhole]

a while back... some single core ones... was not able to trigger some of the sea and sea strobes... 

i think all the fo are now multi core now... 

Edited November 20 by hellhole

[atus]

I had several issues with thin cables which I forgot once I started to use thicker POF cables. I buy them by meters in Aliexpress (3 mm core) and I print my own connectors in petg.

[Dave_Hicks]

 

2 hours ago, atus said:

I had several issues with thin cables which I forgot once I started to use thicker POF cables. I buy them by meters in Aliexpress (3 mm core) and I print my own connectors in petg.

I used to use the 3mm plastic core cables, but some strobe models like the older S&S units had inconsistent triggering with that material. They are also more fragile than the 613 multi-core fiber. It's cheaper, but not as good in my experience. With the multi-core available at about $7 USD per meter in the USA, it's really not expensive for what you are getting. 

 

I make my own 3d printed connectors as well, using PETG & TPU. I've shared my most current design for 2mm fiber connectors at the link below. I would love to see your connectors as well if you have made them available to share. I am always looking to learn from other's great ideas!

 

https://makerworld.com/en/models/846729

 

Edited December 3 by Dave_Hicks

[Barmaglot]

The allowable bend radius for fiber optic strands is directly proportional to the fiber diameter - i.e. the thicker the fiber, the less it can bend before experiencing significant transmission losses. The strands in multi-core fiber cables are extremely fine, and thus can tolerate smaller bend radii.

[atus]

On 12/4/2024 at 12:04 AM, Dave_Hicks said:

 

I used to use the 3mm plastic core cables, but some strobe models like the older S&S units had inconsistent triggering with that material. They are also more fragile than the 613 multi-core fiber. It's cheaper, but not as good in my experience. With the multi-core available at about $7 USD per meter in the USA, it's really not expensive for what you are getting. 

 

I make my own 3d printed connectors as well, using PETG & TPU. I've shared my most current design for 2mm fiber connectors at the link below. I would love to see your connectors as well if you have made them available to share. I am always looking to learn from other's great ideas!

 

https://makerworld.com/en/models/846729

 

Hello, your cables look amazing, I didn't know that fiber so probably I'll buy a few meters to test it. I don't have any account to share my designs in 3D but I'm going to open one. I would like to share my very simple conectors and also my zoom gears for aquatica. 

In the picture you can see the connector and the pof fiber, they fit perfectly with retra strobes, subtronic strobes and I would say taht also with Nauticam housings, one of my dive partners use them with Nauticam but I guess he must fit them first in an adapter. Me, with aquatica housing and other partner with Subal housing are using led triggers where the led is fitted directly to the housing by the outside as shown in the picture.

For the connectors to make them fit and don't release I designed two slots in order to put two 0.5mm thick orings. They really work great.

[Dave_Hicks]

9 minutes ago, atus said:

Hello, your cables look amazing, I didn't know that fiber so probably I'll buy a few meters to test it. I don't have any account to share my designs in 3D but I'm going to open one. I would like to share my very simple conectors and also my zoom gears for aquatica. 

In the picture you can see the connector and the pof fiber, they fit perfectly with retra strobes, subtronic strobes and I would say taht also with Nauticam housings, one of my dive partners use them with Nauticam but I guess he must fit them first in an adapter. Me, with aquatica housing and other partner with Subal housing are using led triggers where the led is fitted directly to the housing by the outside as shown in the picture.

For the connectors to make them fit and don't release I designed two slots in order to put two 0.5mm thick orings. They really work great.

 

Those look great! Definitely get an account on Printables, MakerWorld, or Thingiverse to share. I have a bunch of Zoom & Focus gears shared out as well. I think sharing is one of the coolest parts of the 3d printing DIY philosophy.

[atus]

24 minutes ago, Dave_Hicks said:

 

Those look great! Definitely get an account on Printables, MakerWorld, or Thingiverse to share. I have a bunch of Zoom & Focus gears shared out as well. I think sharing is one of the coolest parts of the 3d printing DIY philosophy.

I've just shared the file, as soon as it gets verified I'll share the link. I'm also going to share a few more items that I'm totally sure that fit and work flawlesly.

 

Here you are the link..

https://makerworld.com/es/models/864862

Edited December 9 by atus
add a link

[Davide DB]

thanks @atus

 

project added to our DYIpedia pinned post. If you have other gears don't forget to post them here.

 

 

 

 

 

[atus]

On 12/11/2024 at 3:21 PM, Davide DB said:

thanks @atus

 

project added to our DYIpedia pinned post. If you have other gears don't forget to post them here.

 

 

 

 

 

Hi Davide, I missed this thread. Very good one !!