[ Response | Lazer Tactical Action Game Message Board ]
Posted by Mike Yates
on November 1, 2009, 12:46 pm
Project ECM update #2 - Battery pack
This post details the battery pack and mounting concept that will be used on the Electronic Counter measure (ECM). This is the same custom tagger that was shown in the post detailing the lens assembly construction for this project - LT lens assembly, dated October 23, 2009.
Since the main priority for the the ECM design is to maintain as compact an overall size and lightest weight possible, this will be the first CTDYNE custom tagger to use the Milwaukee M12 Lithium-Ion 12 volt battery pack and charger to power the V-2 board and the booster board that will drive the three TSAL-6100 array.
I have used the Milwaukee M12 cordless work light as a donor for the battery pack quick release mounting system. The M12 battery can be installed or released in a second or two with no tools. Once installed it is held securely in place until removed for charging. Charge time in the M12 charger is 30 minutes.
The work light was fit and cut to the proper size to act as the receiver for the M12 battery. Aluminum adapter plates were fabricated to mount the battery receiver securely to the tagger housing. A total of 34 fasteners are used to insure no failures under the most demanding tactical situations. This is a very robust assembly and should hold up well in the abusive conditions sometimes encountered in the field.
Milwaukee did a nice job on the overall size and lines of the M12 cordless work light. The modified unit fit very well into the lines of the housing used on the ECM. The material this work light is made from is easy to cut, drill, tap and fit. It appears to be a very resilient material. I wish I could get an entire housing made from this material. It would be heavier than the typical Air Soft housing, but I doubt you could break it, under even in the hands of the most aggressive players.
1. The Milwaukee M12 cordless work light and M12 battery pack.
2, Disassembled work light. The board, on left - above battery pack, is removed from the connector assembly, which is then reinstalled into the battery receiver assembly and wired to the tagger.
3. Modified housing with battery pack receiver installed. Notice how, with the battery pack removed, the lower third of the butt plate is missing. It is fastened to the aft end of the battery pack. The beautify of this system is that not only is the battery pack mechanically connected in seconds, it is also electrically connected at the same time - in seconds. No tools required. Sweet!
4. Right side view of completed assembly, less paint and detail. The lines match up nicely. Once painted this assembly should blend in well.
5. Bottom view of receiver assembly - battery installed.
6. Aft view - battery pack installed. notice how the butt plate is full length now that the battery pack is in place. The shoulder stock portion closely follows the lines of the original design - even with the M12 battery pack installed.
7. Battery packs and charger shown with the ECM. The weight distribution is neutral - to - slightly rearward bias. The ECM should be very easy to handle for extended periods of time.
Many of you may have already seen the you tube video of this battery system installed in the ECM. If not, here is the link:
http://www.youtube.com/watch?v=TKCFMXmRkUM
Mike Yates
"tagging with extreme prejudice"
Message Thread:
« Back to thread
