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Messages - Bootcat

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Thanks guys.

I didn't think about doubling the thin shock cord, that gives us the correct tension when the cummerbund is loaded.
Also, there is a flat cordloc used on the Alice pack that's better suited to cords pulling on opposite directions.

Also, designing new stuff then seeing a big brand unveil kind of the same thing...

Concept, design, and engineering / Cummerbund back attachment solutions
« on: January 23, 2018, 01:36:33 AM »

I'd like to pick your brains about the different systems out there used for attaching and adjusting cummerbunds on vests.
I'm facing a decision to choose a system for a range of laminate lasercut cummerbunds that may or may not adjust in the front (velcro or ROC buckle closure).
The cummerbund will attach under a PALS layer (opening via flap) on the back. No QD system is required.

Here are the choices I see:
- laced cord (think Eagle Industries PC) with cord locking hardware;
- laced thick elastic cord (think Crye JPC) with a knot;
- laced thin elastic cord with cord locking hardware (Eagle MMC);
- elastic webbing and velcro (any covert carry plate carrier on the market);
- vertical bars locking in PALS slots (IOTV Gen3);

What do you think is optimal? Or are there other good solutions that I didn't consider?

Workspace, tools, machinery, and manufacturing / Re: Juki 1281-7
« on: December 28, 2017, 02:14:51 AM »
I've recently bought a Jack 6380HC-4Q with electric foot lift and automation. It has a similar transport system and a big bobbin. FWIW the vendor says that Jack nowadays makes better mechanics than Juki.
So far it does everything I wanted (like sewing over 10mm foam shoulder pads) so I think a triple feed has slim advantages over it and costs way more.
An unexpected bonus is that I can edge bind beautiful corners with a simple Chinese folder without changing the foot.
The big bobbin is a big advantage too.
Only issue I've had is the machine is designed for pulling thick thread from leather - the pulling action after cutting often pulls the (slightly elastic) size 69 thread from the needle eye. There are workarounds for that.

I'm currently consulting with BOFA distributors about the best system to use. Was initially looking at an Oracle SA or Oracle iQ - with your data above I'll ask whether it's enough.
I've asked the current blower manufacturer about the detailed specs to have a baseline.
The sealing work is done already.

No idea..

Materials science / Re: Thread: I'm in need of some info
« on: November 25, 2017, 03:13:23 AM »
Forgot to mention but yes, the nylon thread was fraying due to heat buildup for instance when sewing 4 layers of 55301 - no such problem with the Serafil polyester thread. Give it a try!

Materials science / Re: Thread: I'm in need of some info
« on: November 24, 2017, 06:54:59 AM »
In our French company we use Zwibond 40 in most machines and Serafil 40 in the bartacker.
Less stiff than the bonded nylon A&E thread used previously and satisfactory for all our applications.
I'm not aware of a choice of twist direction for these threads.

Introductions / Re: New position
« on: November 22, 2017, 02:28:55 AM »
Good news!

Thanks - it will be the first winter in this location so I expect surprises. The laser has its own room. I suppose I'll need to add glycol to the water circuit and/or a heater inside the machine to keep the tube at a correct temperature later on.
For some reason the good people at the CNC forum never answered my ventilation questions so I'm happy to get some input here  :).

Thanks Mike9386, this is just what I needed to know. Since I don't cut TPU/Hypalon the simpler Oracle iQ should be adequate but I'll ask the distributor.
Bonus question: did you connect the upper exhaust tube to the extraction unit? It's not clear to me if I need a T connection and a valve between the exhaust tubes or if I should simply connect the lower to the extraction unit.
Also, do I still need to extract the air outside of the production room with such filters or can it work indoor? I'm worried about extracting hot air from the room in the winter.

A useful trick in exchange: if you take off the air flow regulation valve and directly plug the pipe into the laser head your airflow will greatly increase, effectively pushing most fumes below the table. The valve has a max diameter of only 1mm which bottlenecks the compressor airflow.

Vendors and sources / Re: Pics of Texcel Mandrake and Raid?
« on: November 15, 2017, 02:32:13 AM »
Dead cam walking... just like the Pencott range. Only ATACS and Multicam families have enough mass to exist on the global market (not counting national patterns).

Vendors and sources / Re: Is anyone having trouble with Texcel right now?
« on: November 08, 2017, 01:23:29 AM »
I was recently surprised when ordering plain Tan 499 55301 webbing, 3 weeks of unannounced waiting time before shipping. Before that Texcel always shipped in 24-48h.

Vendors and sources / Re: Plastic Covered Cable and Clamps
« on: November 02, 2017, 01:48:48 AM »
Again, the easiest solution is to look at Ebay for flying kite cord in Kevlar. I did some slings with Kevlar cord loops - very resistant stuff but a hard sell as it looks like a fine shoestring...

Vendors and sources / Re: Plastic Covered Cable and Clamps
« on: October 31, 2017, 01:34:05 AM »
Forgot to mention that I found this cable type in USGI ballistic vests contract documents, so it's "Mil-Spec" in a way.
Nowadays I would rather look for plastic cables instead of steel - medics tell me that steel cables makes for very fine shrapnel when hit and are a PITA to extract from flesh.

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