Small fuse for TW5 folding stock conversions

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Small fuse for TW5 folding stock conversions

Postby Fitch on Tue Jan 12, 2016 2:13 pm

Here's a question for those who have embarked on TW5 rear sliding stock conversions.

Obviously space is tight in there and the use of the existing fuse and holder is impossible (unless you rethread the wires to the front hand stock where you can store the actual fuse holder in the cavity).

I'm using 11.1 stick batteries in the upper receiver and there is probably just enough room to have the fuse in this area but cant find a suitable fuse/holder dinky enough to neatly tuck in.

I know of conversions that simply ignore the fuse (my last one was set up like that) but due to the expense and scarcity of the TW5 main board it probably best to include one.

In regards to a simple, small and convenient inline fuse - what are people using in their conversions? Any ideas or advice appreciated...
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Re: Small fuse for TW5 folding stock conversions

Postby CxK-ArthurDent on Tue Jan 12, 2016 7:34 pm

short
afaik the fuse only protects the motor - but not the ECU (like with all xTWs), so it's save(for the ECU) to go without it.

a bit more ..
here is 30-35A fuse on the fetboard. but if the ECU is really pulling more than that (is has to, to blow the fuse)
you have another, bigger problem. Consider the small 4 wire cables from ECU to FET
they will be vaporized even with less A. will say it's nearly impossilbe tho kill that fuse with only a ECU.

Only the motor itself is able to pull that much A.
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Re: Small fuse for TW5 folding stock conversions

Postby Fitch on Thu Jan 14, 2016 12:25 am

Ok - so what you're saying is, the stock fuse only protects the motor anyway?

I'm trying to replicate the original fuse in a stock gun - just miniaturising it
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Re: Small fuse for TW5 folding stock conversions

Postby CxK-ArthurDent on Thu Jan 14, 2016 8:16 am

jepp .. only the motor.

if you like to stay with a fuse you could dissolder the small PCB board with the fuse an attach the fuse
to the wires direct with a cable lug.
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Re: Small fuse for TW5 folding stock conversions

Postby thundercactus on Thu Jan 14, 2016 9:49 pm

It's a slow blow fuse, boards are damaged by current spikes more than excessive draw, so the fuse doesn't protect the electronics *at all*
In theory, it protects the motor from drawing too much amperage, but it generally does a garbage job at that, too.
And technically, you should be sizing the fuse by the type of battery and type of spring you're currently running. Since we go to the top end of 35A all the time, the fuse doesn't really protect the motor, either.
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Re: Small fuse for TW5 folding stock conversions

Postby Blackwolf on Sun Jan 17, 2016 1:45 pm

Hello

Alô my MP5 conversions still use The pç board with fuse in The back,no problem you only need to work The hole in The back to pass The board.

Regards
BLACKWOLF aka Francisco Costa Lobo
www.airsoftmechanix.com
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Re: Small fuse for TW5 folding stock conversions

Postby Fitch on Sat Jan 23, 2016 3:44 pm

Cheers guys - awesome as ever. Thanks.
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