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Rapidstrike FCG Microswitch Bracket

 
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Rapidstrike FCG Microswitch Bracket
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Captain Slug
New Member


Joined: 14 Sep 2016
Posts: 11
Location: Sterling, VA



Post Rapidstrike FCG Microswitch Bracket  Reply with quote
This is probably a little bit of overkill since it's usually only the flywheel switch that needs to be replaced. But I just did not like the tactical sensation of the stock switches so I wanted to see if I could use nothing but microswitches.

I'm using Mcmaster part# 7510T12 (Omron V7-1Z19E9-022) for the flywheel switch, and 7779K63 (Omron V-15G2-1C25-K) for the other two.



This took a fair amount of fiddling to get just right. And now that I have it finished I went ahead and modeled it so others can 3D print their own.
And if you want to do so, the following needs to be done to duplicate the result shown above.


1. The trigger switch lever needs to be bent around the end of the switch.
2. The flywheel switch lever needs to be clipped shorter or removed completely. On the 15 amp switches you can get rid of it by drilling out the rivet. On the 25 AMP switches it can be removed easily by prying the case open until it falls out.
3. The stock plastic piece for the park switch for the pusher needs to have the spring peg clipped off of it. You will still be able to use the spring if you want.
4. The holes for the switches will need to be drilled and tapped for UNC 4-40 screws, as will the standoffs for the two cover plates.
5. Use wire cutters to snip off the first rib of plastic below the pusher motor to make room for the trigger switch. You will need to remove two or three pegs from the left half of the blaster as well.



The screw holes that allow you to attach the plate inside the shell are countersunk, so you can use flat head 4-40 screws to install the plate. Then simply attach all the micro switches to the plate using 3/4" length 4-40 screws.


https://www.shapeways.com/product/KDWZQDA3N

STL File

http://captainslug.com/Nerf/rs_fcg.zip

The prototype arrived today and I've confirmed that it fits the shell and the rest of the stock trigger components.




Last edited by Captain Slug on Sat Jan 07, 2017 4:35 pm; edited 1 time in total
Fri Jan 06, 2017 8:11 pm View user's profile Send private message Visit poster's website
OldNoob
Foam Data Collector


Joined: 07 May 2013
Posts: 4826
Fav. Blaster: Xtreme 180 Rapidstrike
Location: In the Boonies



Post Reply with quote
Don't know if you have seen the British version, which has been sold by BSUK for years. Literally hundreds of them have been sold all over the world.


_________________
Big_Poppa_Nerf wrote:

Boff whats the damage? I have spent over 3 times my Nerf budget this month already. Part of me is trying to be a responsible parent/husband/house owner. The other half is just says 'Ahhhh, Screw it!'.
Fri Jan 06, 2017 8:57 pm View user's profile Send private message Send e-mail
SSGT
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Joined: 12 Jan 2013
Posts: 1267
Fav. Blaster: 'Rave-N' CS-18, Elite Alpha Trooper (EAT) CS-12
Location: Durham



Post Reply with quote
Full-size on the trigger and cycle control may be overkill for most builds but I'd rather use this than a traditional fire control group setup (full-size accel trigger, sub-mini trigger and cycle control) with builds running Hellcat flywheel motors and a Wolverine pusher motor on 3S - I'm not sure how long a "10A" sub-mini, even a quality one like a DC2 or Omron SS10, will last with the 70+A inrush currents demanded by a Wolverine.

Losing the ability to collapse the stock is a big negative in my view - not an issue for everyone though and certainly not an issue in Rapidpistol builds.

_________________
Trust me, I'm an engineer! Very Happy

Antonius wrote:
Compoooter bits make shiny Nerf blaster go whoosh!
Fri Jan 06, 2017 9:08 pm View user's profile Send private message
OldNoob
Foam Data Collector


Joined: 07 May 2013
Posts: 4826
Fav. Blaster: Xtreme 180 Rapidstrike
Location: In the Boonies



Post Reply with quote
I have a gen 1 with 5a cherry switches, still working on 2s XP180 and 3s lifepo XP180, rev works perfectly. Over 2 years old now.
Never had or seen a failed DC2 on the rev.

_________________
Big_Poppa_Nerf wrote:

Boff whats the damage? I have spent over 3 times my Nerf budget this month already. Part of me is trying to be a responsible parent/husband/house owner. The other half is just says 'Ahhhh, Screw it!'.
Fri Jan 06, 2017 9:29 pm View user's profile Send private message Send e-mail
Captain Slug
New Member


Joined: 14 Sep 2016
Posts: 11
Location: Sterling, VA



Post Reply with quote
OldNoob wrote:
Don't know if you have seen the British version, which has been sold by BSUK for years. Literally hundreds of them have been sold all over the world.

I am familiar with those. I just wanted to use higher amp rating switches and manage to get three of them inside the shell without too much shell trimming and wanted to make the same part available to everyone else.

There are also mounting holes on the bracket for submicro switches on the trigger and rev switch if someone wants to use those instead. In that setup you can trim off any excess material left on the bracket.
SSGT wrote:
Losing the ability to collapse the stock is a big negative in my view - not an issue for everyone though and certainly not an issue in Rapidpistol builds.

This particular build is using a hybrid stock. Once I get further along in the wiring I'll find out how much I will have to trim off the front of the stock in order to clear the trigger switch.


The 3d-printed prototype will be going in a different rapidstrike which I'll probably be turning into a rapidpistol.
Fri Jan 06, 2017 9:31 pm View user's profile Send private message Visit poster's website
Northwind
Nerf Addict


Joined: 28 Dec 2014
Posts: 899
Fav. Blaster: Rapid Red
Location: Edinburgh



Post Reply with quote
SSGT wrote:
I'm not sure how long a "10A" sub-mini, even a quality one like a DC2 or Omron SS10, will last with the 70+A inrush currents demanded by a Wolverine.


I didn't spot it when it came out but BSUK also now do a mosfet version to take the strain off the switches.
Sat Jan 07, 2017 12:51 am View user's profile Send private message
Elime_rawne
Regular Member


Joined: 09 May 2015
Posts: 111
Location: North London



Post Reply with quote
Thank you for releasing this to the community for free.
Sat Jan 07, 2017 9:28 am View user's profile Send private message
SSGT
Nerf Addict


Joined: 12 Jan 2013
Posts: 1267
Fav. Blaster: 'Rave-N' CS-18, Elite Alpha Trooper (EAT) CS-12
Location: Durham



Post Reply with quote
Northwind wrote:
I didn't spot it when it came out but BSUK also now do a mosfet version to take the strain off the switches.


That version still only has a FET for the flywheel motors - in a build with Hellcat flywheel motors and a Wolverine pusher motor it isn't the flywheel rev switch you need to worry about. A pair of Hellcats will draw up to 44A total at stall so a full-size 21A switch, which should be rated to around 40A inrush for a motor load at 11.1V, will just about cover it. A single Wolverine, however, can draw anything up to 70A stall on 3S and most FCGs use 10A submini switches which I can't really see being rated to much more than 15-20A inrush for an 11.1V motor load. Even though decent submini switches, whilst not officially rated for that kind of use, have stood up to pairs of Hellcats and 3240s I think asking them to switch and brake a Wolverine pusher motor is asking a bit much of them - you really need to at least consider going full size for the trigger and cycle control if you're running a Wolverine pusher motor.

You can switch the pusher with FETs but you need to use both an N-FET and a P-FET in a half-bridge and you need to make damn well sure you don't allow both to switch on at the same time and short the pack.

_________________
Trust me, I'm an engineer! Very Happy

Antonius wrote:
Compoooter bits make shiny Nerf blaster go whoosh!
Sat Jan 07, 2017 2:54 pm View user's profile Send private message
Captain Slug
New Member


Joined: 14 Sep 2016
Posts: 11
Location: Sterling, VA



Post Reply with quote
Elime_rawne wrote:
Thank you for releasing this to the community for free.


That is how I do. The Shapeways item doesn't even include a markup. You can print one yourself, though it will require support material (or selective clipping of the model).

SSGT wrote:
in a build with Hellcat flywheel motors

That's my concern right there. I have one build coming up soon that is all Hellcats.
Sat Jan 07, 2017 8:04 pm View user's profile Send private message Visit poster's website
Northwind
Nerf Addict


Joined: 28 Dec 2014
Posts: 899
Fav. Blaster: Rapid Red
Location: Edinburgh



Post Reply with quote
Good point there SSGT, I was overlooking the really high draw pusher motors (high ROF doesn't appeal to me so I'd kind of forgotten  Embarassed )


Sat Jan 07, 2017 9:02 pm View user's profile Send private message
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