Ravens' tech thread

Discussion in 'Gun Building, Modifications & Repairs' started by Raven1st, Sep 18, 2013.

  1. Raven1st

    Raven1st Well-Known Member

    5,488
    415
    San Ramon valley
    So I have been on a teching 'binge' lately and I have thought that insted of making a thread every time I have a question I would make a thread and keep all my thoughts here.

    Projects in the near future:
    I will be posting my guide on how I have made my pre-cocking sector gear soon.
    Guide is finished
    I will be helping upgrade my friends KWA g36 this weekend so I will post how that goes.
    Work has been finished
    I am going to rewire my CM16 and add mosfets to all my guns and said friends gun this weekend also, should be fun.
    Mosfets still need to be installed

    Possible projects:
    JG Sig 550 DMR. My friend wants a 550 'DMR' and I will be helping with that, no eta.
    Goals: 400fps w/ .20 (field limits) 12in groups at 250'
    SHS 15t, Lonex POM PH, SHS 13:1, SHS HT motor, ERHop, rewired and other mods.

    'DMR' Famas, best bet next spring at the soonest.
    Goals: 400fps w/ .20 (field limits) 12in groups at 250'
    SHS 15t, Lonex POM, SHS 20:1, HC HT motor, ERHop, and mods.

    DSG CM16, will be done by December.
    HPA G39 w/ High-cap magazine.


    So if any of you have any thoughts on these projects of mine I would love to here them. I am no way ready to do a DMR today, but hey, I hope to build one before the year 2014 comes to a close.

    EDIT: Updated project list.
     
    Last edited: Oct 7, 2013
  2. TheInfidel23

    TheInfidel23 Resident Derp Supporting Member

    9,926
    18
    Greenville
    Dropping a casual sub. Think about doing that DSG this winter, we've got a little contest going on ;)
     

  3. Raven1st

    Raven1st Well-Known Member

    5,488
    415
    San Ramon valley
    That's what got me thinking of finally making one.
    A guide on my Pre-cocking sector gear should be done in a few if you want to take a look.
     
  4. Jakester88

    Jakester88 Active Member

    7,135
    3
    Hartland
    Pre-cocking? Count me in :D
     
    BOA_SP3CT3R likes this.
  5. TheInfidel23

    TheInfidel23 Resident Derp Supporting Member

    9,926
    18
    Greenville
    Have you peeked in on the other thread? Pretty impressive, this young one is.
     
  6. Raven1st

    Raven1st Well-Known Member

    5,488
    415
    San Ramon valley
    Raven's Guide to a Pre-Cocking sector.

    This is an idea I got while Bejon was talking about overspin.
    I would like to thank the following members for giving me great feed back on my other thread:
    Bejon, Magpulman, Marine, TheInfidel, BoogerMC, Archer,and Schultze.

    Here is ZaCkOXs' warning.

    "Now to clearify the problem with your pre-cocking method. I am not saying it doesn't work. It just needs pre-cautions which are not really stated.

    This isn't really your fault but it isn't stated clearly that pulling the ARL on stiff springs risks breaking a gearbox. This type of knowledge comes from people that have seen what happens. I once tried to pull the ARL manually on a M150 and it broke the sector gear teeth. I realized what had happened. The gears were spinning backwards and I had let go of the ARL which caused it to snap back into place stopping the motion. The problem is the spring is forcing the gears that direction and when stopped the momentum still is there because of the spring. So in other words it couldn't continue to rotate and broke teeth because the spring was forcing the gears to still move."

    With that out of the way I will begin to tell you about this new sector gear.
    It is a mechanical way to pre-cock your gun. It's that simple, and the build is so simple you might be wondering why there was not a thread on this before*.

    *I cannot say with 100% accuracy that there has never been a thread on this, I just have not found one.

    So begin.
    You will need the following:
    Dremel with cutting and grinding attachments
    JB Weld. For this I used a 6-5 ratio of steel to hardener
    Knife
    File
    Sector gear
    Paperclip
    Degreaser (Dawn or Ajax will work)


    First thing you will need to do is get al you tools organized in your work area and double check that you have everything that you need and that your work area is clean and unobstructed.

    So, now can we work?. Not yet.
    Before you can work on the gears you will need to remove all that sticky grease (Chinese or your own) from the gear.
    This will help the JB Weld adhere to the gear and not come off when in operation.

    Once you have got all the grease off you can start working.
    Begin by taking off the small 'nub' that is there to activate the cutoff lever.
    20130918_192040_HDR_resized.jpg
    Once you have cut it off proceed to smooth it down with the grinder attachment until it is semi round and all traces of the original nub is gone.
    Screenshot_2013-09-22-17-32-14.jpg
    Then you will need to add the JB Weld to the position where you want the new nub. I put mine 180 degrees from where the original nub was positioned and achieved a 3/4 cycle, but 90 degrees should get you a 1/4 cycle.
    Do not be afraid to add a little more than you need. You will need to make the pile of JB Weld larger than the size of the nub you are replacing.
    To do this I used a paperclip.
    Screenshot_2013-09-22-17-32-08.jpg

    Once you have let the JB Weld sit for 5-6 hours it should be hard enough to work on, but not completely set.
    Now cut the pile down to the size of the old nub and file the sides smooth; I would keep the nub slightly bigger than the factory nub until you can verify that it will work in your gearbox.
    20130918_103236_HDR_resized_1.jpg
    Make sure the top of the nub is low enough to avoid rubbing against the inside of the gearbox, it will make shimming a pain and could cause the nub chip or fall off.
    After you are done with shaping your new nub let it sit over night or 24 hours for it to fully cure. You don't want it to fall off in your gearbox.

    Now you can install the sector gear and tune your gearbox; if you need to you can shape the nub to the right size to ensure it will function just like the factory nub and activate the cutoff lever.

    Now go out and enjoy your greatly improved trigger response with out the need of a computerized mosfet.

    Edit: Now fifth draft; new pictures and reworded.
    Please comment and tell me you thoughts.
     
    Last edited: Sep 24, 2013
  7. Bejon

    Bejon Member

    678
    0
    Willoughby
    Leave me out I see how it is :p seems pretty nice though. Pretty detailed guid just maybe a few more pics and I can see this stickies
     
  8. Raven1st

    Raven1st Well-Known Member

    5,488
    415
    San Ramon valley
    You were the first user I mentioned:p
    Edited you in again.

    Yeah I do need more pictures for the guide, I may try to expand the guide this weekend when I upgrade my friends KWA.

    I am staring at the gates of techs' nightmares, but I will go forth and emerge out of the storm,victorious.

    I may be exaggerating how bad a KWA GB is.

    Edit: I have edited the guide to second draft.
     
    Last edited: Sep 19, 2013
  9. Bejon

    Bejon Member

    678
    0
    Willoughby
    Have fun with that one raven, personally don't like kwa gb's

    As a not on your guide try to be a little more descriptive on what parts to use as from what I remember you list more parts than what you describe using
     
  10. Archer627

    Archer627 Active Member

    6,179
    15
    Figgington
    To aid in the adhesion of the JB Weld to the gear, hit it with a bunch of brake parts cleaner to rid it of any oils and greases. It'll greatly increase the bond strength which could be the difference between the life and death of this system.
     
  11. Raven1st

    Raven1st Well-Known Member

    5,488
    415
    San Ramon valley
    I face the shadows in the valley of death, but I shall fear no evil. :cool:

    My first try I used a welder to add material so you may be confusing what tools I used with that.
    I will look into the guide and see if I did leave anything out though.

    Thanks for pointing that out, editing in now.
     
    Last edited: Sep 19, 2013
  12. Raven1st

    Raven1st Well-Known Member

    5,488
    415
    San Ramon valley
    So on my last thread there was a discussion on how to reset the piston so it does not compress the spring when not in use.
    I found this:
    http://www.airsoftgi.com/product_info.php?products_id=586

    I was wondering if it would drop into my CM16 GB, or would I need to modify it a bit for it to work?
     
  13. Archer627

    Archer627 Active Member

    6,179
    15
    Figgington
    Would not work. Just shoot in semi a few times or make a notch in the ARL to release it.
     
  14. Raven1st

    Raven1st Well-Known Member

    5,488
    415
    San Ramon valley
    Ok, thanks.

    So I will be doing a DSG latter this winter and I have already gathered a list of possible components. Just looking for thoughts on this.

    All from Clandestine:
    Seigetech(?) DSG $55
    Core SP130 $5.50
    ZCI cylinder, type 0 so I can port $6.50
    SHS 15 tooth piston $9
    Sorbo 1/4 thickness $5
    Lonex POM $15
    Super lube silicone $8
    HS5 Rhop 3-pack $11.50
    Shimmed, AoE, DIY mods, ect.

    I do have a 300mm barrel if that will be a problem. As far as I know the ideal length for a DSG is 260mm.

    Just a alpha build list.
    looking to hear anyones thoughts or suggestions on this.
     
    Last edited: Sep 19, 2013
  15. Jakester88

    Jakester88 Active Member

    7,135
    3
    Hartland
    That spring is going to be really light for a DSG build. Also, are you upgrading the motor at all?
     
  16. Raven1st

    Raven1st Well-Known Member

    5,488
    415
    San Ramon valley
    So an SP140. I should note that my field limit is 400fps with .2s'.

    I already have a JG red, and my lipos are on their way.
     
  17. Jakester88

    Jakester88 Active Member

    7,135
    3
    Hartland
    If I remember correctly, Legacy on here is using an M170 in his and he's getting around 350 (I'll check my sources).

    Hmm, not sure about the red... Might be a bit fast for that kind of setup.
     
  18. Raven1st

    Raven1st Well-Known Member

    5,488
    415
    San Ramon valley
    It's shooting 18rps on shs 16:1 gears and a 9.6v battery right now. I will be using the stock XYT 18:1 gears for the DSG and a 7.4 1800 mah 20-40c lipo to power the drivetrain.
     
  19. Jakester88

    Jakester88 Active Member

    7,135
    3
    Hartland
    Couldn't find it, went through 7 pages.

    So this isn't really an all out DSG build?
     
  20. Raven1st

    Raven1st Well-Known Member

    5,488
    415
    San Ramon valley
    Not really, I just want to test the waters on this and expand my teching skill.

    Teching is something that I really like to do. So this build, and maybe a couple DMRs', on my resumé would help me expand my skill to the point where I could start turning all the time I have invested into airsoft into some money. (Needless to say, to invest into airsoft.)

    But that is just a hope right now.

    Edit: random though.
    Could I make a high-cap feed faster (at a higher rof) if I rewound the spring in the magazine?
     
    Last edited: Sep 19, 2013