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Snow Wolf BB sensor problem (back to broken)
http://www.forum.alienslegacy.com/viewtopic.php?f=4&t=14998		 Page 1 of 1
Author:  birdie [ Wed Nov 26, 2014 4:08 pm ]
Post subject:  Snow Wolf BB sensor problem (back to broken)
I recently did a complete disassembly of my Snow Wolf to do mods and a new paint job and now I'm trying to put it back together it seems that the BB sensor for the counter is not working :( I have clipped the sensor back onto the barrel and have the mag loaded and installed, but when I switch the counter on it reads at zero, and I can only fire a single shot, then the gun stops loading the BBs.

If I take the sensor off the barrel the gun fires normally.

I have no idea what then problem is, as I have no idea how the sensor works :lol:

Anybody out there have any ideas what might be wrong? I'm guessing that if the sensor is damaged I'm screwed, since there would be no way of getting a new one?
Author:  Noble [ Wed Nov 26, 2014 4:16 pm ]
Post subject:  Re: Snow Wolf BB sensor problem
Sensor is 2 leds facing each other. (TX/RX)

Maybe they are misaligned.


Your counter should read 95 when inserting the mag.


Sometimes a little tape on the mag will help the switch.



I can send you a bunch of picts, to improve the overall PR accuracy if you like.
Author:  birdie [ Wed Nov 26, 2014 4:33 pm ]
Post subject:  Re: Snow Wolf BB sensor problem
Thanks Matt, anything would help at this point!

Email is birdie17uk@yahoo.com

BTW, what is making the contact to the sensor when inserting the mag? The power for the sensor goes straight from the counter battery to the sensor, so I'm not seeing where a connection is made to the mag?
Author:  birdie [ Wed Nov 26, 2014 4:43 pm ]
Post subject:  Re: Snow Wolf BB sensor problem
This is how it's set up at the moment, am I missing something?

Image
Author:  Noble [ Wed Nov 26, 2014 5:51 pm ]
Post subject:  Re: Snow Wolf BB sensor problem
Here's my troubleshooting suggestion:

-Take the barrel off the thompson.

-Hold down the magazine switch to read 95 (snap switch on the side of the counter PCB assy.)

-Drop a bb down the barrel to see if it counts down.


That would be the first step.
Author:  birdie [ Wed Nov 26, 2014 6:04 pm ]
Post subject:  Re: Snow Wolf BB sensor problem
It's working fine now, I was just being really dumb.

I couldn't figure out how the contact was made between the sensor and the mag. Then I turned the battery holder/counter over and realised it was on the back :roll:

Because I don't have the shrouds back together (I'm still working on mods to a real Spas Cage), the circuit wasn't being made. Thanks for the assist, next time I'll plug my brain in....
Author:  Noble [ Wed Nov 26, 2014 7:40 pm ]
Post subject:  Re: Snow Wolf BB sensor problem - Sorted!
No worries.

While you are at it, could you tell me the barrel diameter in MM.

Thanks.


I'm getting tired of my thin/inaccurate SD studios barrel.
Author:  birdie [ Thu Nov 27, 2014 7:52 pm ]
Post subject:  Re: Snow Wolf BB sensor problem - Sorted!
Barrel diameter is 20mm.
Author:  Noble [ Thu Nov 27, 2014 8:04 pm ]
Post subject:  Re: Snow Wolf BB sensor problem - Sorted!
Cheers! Thanks B.
Author:  bigbisont [ Thu Nov 27, 2014 10:13 pm ]
Post subject:  Re: Snow Wolf BB sensor problem - Sorted!
Noble wrote:
No worries.

While you are at it, could you tell me the barrel diameter in MM.

Thanks.


I'm getting tired of my thin/inaccurate SD studios barrel.


For what it is worth, the ID should be 11.5mm. (Diameter of a .45 acp round which the Thompson fired. OD is hard to say for sure but Id be surprised if it was as big as a snow wolf barrel.
Author:  Rob [ Thu Nov 27, 2014 10:53 pm ]
Post subject: 
A real M1A1 barrel is unevenly tapered. From about 16mm to 25mm.

Attachment:
Thompson M1A1 barrel
SmoothBarrelNewRaw1.jpg
SmoothBarrelNewRaw1.jpg [ 113.51 KiB | Viewed 8612 times ]
Author:  Noble [ Fri Nov 28, 2014 1:01 am ]
Post subject:  Re: Snow Wolf BB sensor problem - Sorted!
If I remember correctly,

the end of the PR barrel should be 18-19 mm.


I'm looking to do a truly accurate metal set (stock/vent/barrel) in the coming year.

SDstudio pieces are too off, after seeing better reference material in the last few years.
Author:  septic [ Fri Nov 28, 2014 3:16 am ]
Post subject: 
Wooo! That sounds interesting. Hand up for 1 please (as am slowly working on a making a live-firing hero PR).
Author:  birdie [ Thu Dec 04, 2014 1:09 am ]
Post subject:  Re: Snow Wolf BB sensor problem (back to broken)
Looks like this is cursed :evil:

The solder broke on the middle white wire while replacing the unit in the barrel triangle. Re-soldered it, but definitely dead this time. If anyone has a spare, please shoot me a PM.
Author:  Sidewinder [ Thu Dec 04, 2014 11:15 am ]
Post subject: 
Could be just a dry joint causing poor contact, try re-soldering it with fresh solder?
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