How to Change the Batteries on a Mp5 Airsoft Gun

Airsoft Gun Wiring Repairs

Airsoft gun wiring plays a very important role in the optimal functionality of all automatic AEGs. Currently, some models come packed with beautifully intricate electronic Mosfets and triggers. However, today, what I'll exist addressing is the general wiring of an Airsoft AEG and the associated components. These include:

Fuses
Battery connections
Motor connections
Standard trigger contact shuttle and the complete contact organisation
The AEG wiring that completes the circuit

Fuses

When you get to the electrical circuit of an AEG, you are going to detect some sort of fuse link and a fuse holder. In general, Airsoft factories use fifteen amp fuses in lodge to protect the circuit of the motor. In instance your motor fails when you burn down the trigger, the first diagnostic step is checking your battery and fuse connexion. In case you lot upgraded your gun for a higher FPS with high torque motors, you lot may have had to take the fuses out for ideal operation. However, if yous use them or you are a little concerned almost your setup, here are two keen options for y'all.

Plastic or glass automotive fuse : you will find them in the majority of stock AEGs out there. In case they trip, you just supercede it by popping some other one in.

Figure : AEG Plastic blade type fuse
Source: havarhen , Electrical fuses, plug-in blazon, different sizes , CC Past-SA iii.0

Figure : Glass fuse
Source: Aka , Glassikring , CC BY-SA 2.5

Resettable/Polyfuses: when heated, these types expand gradually to such a signal that they tin't conduct electricity any more. After the excursion is broken and current is no longer flowing, they cool and contract to a point where they can conduct electric current in one case again. Nonetheless, later on they trip for the showtime time, they easily trip again unless y'all give them enough cooling time.

Figure : Resettable Polyfuse
Source: By Shaddack (Own work) [Public domain], via Wikimedia Commons

Connections

Battery Connections

In electric Airsoft guns, the connections essentially brainstorm at the bombardment, located on the barrel stock or at the front grip, depending on your model. There are two main battery connections that are used depending on your gun's model. They are:

Pivot/Tamiya plug connector – Accept lighter contacts with lower amperage rating. These are much more susceptible to loosen up and volition likely atomic number 82 to recurrent repairs since they vesture out afterward roughly 50 cycles.

Effigy : Tamiya Plug Connector
Source: Past Blackeagle2001 at English Wikipedia [Public domain], via Wikimedia Eatables

T-Type/Deans plug connectors – The contacts are much heavier since they take a higher amperage rating of between 30-40 amps. This translates to less resistance and thus, a cooler running motor

Figure T-Type/Deans Connector:
Source: KundaliniZero , Deans connector ane , CC BY-SA three.0

How to add the T-Blazon/Deans plug connectors

If you are tired of the recurrent repairs of the Pin/Tamiya plug connector, here is how yous can replace them with the much better T-Type/Deans plug connectors.

Technical Outline

OBJECTIVE: Adding the T-Type/Deans plug connectors
DIFFICULTY LEVEL (on a scale of 1-10): half dozen
Duration: xx-thirty minutes

Required Tools

Soldering iron
Flux
Sandpaper
Estrus shrink tubing
Wire Strippers
Pliers

Required Replacement Parts

T-Type/Deans plug connectors

Effigy T-Type/Deans Connector
Source: .HYPERLINK "https://commons.wikimedia.org/wiki/User:.tirnado"tirnado , T-plug , CC Past-SA 3.0

Procedure

STEP A:

Cut off the Tamiya Plug connectors. In case this is the battery, ensure that you only cut off a single pb at a time so that you tin avert a short circuit. You tin can besides utilise a prune or vice to clamp the Deans plug to hold it as you solder. In most cases, the male person cease is connected to the AEG harness and the female terminate goes to the battery.

Step B:

Next, set in each of the terminals of the Deans plug past adding a solder bubble to each of the tabs of the terminal

Pace C:

From there, identify a oestrus compress slice on each of the wires that are to exist soldered and join the positive (+) wire to the perpendicular tab and join the negative wire to the flat tab.

Motor Connections

Moving to the hand grip, you lot volition find the motor and its wire terminals which connect it (the motor) to the wire harness. Sometimes due to vibrations, these terminals may finish up getting lose from the motor, causing a short circuit that causes motor failure. To prevent these shorts, the gun motor terminals should be tightly fitted and properly insulated. At that place are three main options for motor connectors:

Standard Motor Connectors: have very high resistance and thus, they aren't the all-time choices.
Gold Plated Motor Connectors: these permit for increased contact between the connector and the tab of the motor and thus the resistance reduces significantly.
Directly Soldered Connectors: the wire is directly soldered to the motor tab. These are the all-time options especially since the resistance is minimal. Nevertheless, every time you remove the motor, you have to de-solder them.

Trigger Contact Shuttle and the Contact System

When you go within the gearbox you will discover the contact shuttle and the trigger contacts. Merely the red (+) wire should be connected across the switch. In older AEG circuits, the selector plate is used equally a indicate of contact too. When running maintenance of your electric gun, bank check the contact assembly's return spring and clean the contact surfaces in case they have a noticeable carbon build up or any other visible kind of dirt. Do NOT scratch the contacts. Check for whatever pitting or burning and you tin replace if demand be. In case you plan on upgrading your AEG for heavy use situations or college FPS, use higher temperature contacts and shuttle.

AEG Wire Pick

There is a vast selection of wires that you should consider using in your AEG depending on the advantages and disadvantages. Here'southward a quick breakdown:

Solid Wire

Pros:

Very sparse
Has low resistance
Tin can handle higher amperage than an equivalent gauge stranded wire
Very stiff and tin can easily be routed through the gearbox

Cons:

Fragile
Might be too stiff in some cases

Silicone Wire (Deans Wet Noodle)

Pros:

Exceptionally low resistance
Highly flexible

Cons:

Pretty expensive
Quite thick
Tough to solder
Its insulation tears easily

Hook-up Wire

Pros:

Highly flexible
Thinner than a regular silicone wire
It's very affordable and easy to find
Pretty tough insulation

Cons:

Its 16-gauge wire may sometimes be too thick for the V2 gearbox
Its performance in depression resistance and amperage is not sufficient

Teflon Coated Mil-spec Wire

This is the standard OEM wire in Tokyo Marui, Prometheus and Systema

Pros:

Pretty strong insulation
Exceptionally sparse: a 16AWG Teflon wire is much thinner than any other kind of AEG wire
Comes with a silver coated copper usher
Low resistance
Quite potent and can easily be routed through AEG bodies and gearboxes

Cons:

Plush
Non very forgiving in case you lot wrongly measure out the lengths

Wire Size

Wires are measured in the AWG (American Wire Gauge) system where the gauge number is inversely proportional to the size of wire. i.e. the larger the number, the smaller the wire. Basically, the size of the Usher is the but aspect that determines the gauge and non the wire'south overall size.

Depending on the manufacturer of the Airsoft gun, the wires used may be PVC or silicone coated and in general, a 16 AWG wire is used and information technology tin can handle 75 amps. However, high end companies typically go for heavier 14 AWG wires while low end companies utilise 18 AWG wires which are lighter. In the USA, depression resistance PVC coated wires are readily available and silicon wires can even be bought from hobby shops.

For the all-time performance of your Airsoft gun, the type of bombardment and voltage also play a crucial role, but that is a topic nosotros'll cover much deeper another day.

Step by Footstep Guide on How to Supercede a Version 2(V2) Wiring Harness

Does it feel like your AEG starts having issues right when you are in the heat of the action? Well, in such a state of affairs, what do y'all do? Instead of shifting your focus in some rather unfulfilling activities like rampage watching a TV show, I will show you how tin go your AEG up and running once again in less than an hour. Whether you are having a serious mechanical problem or you lot are just looking to give information technology an interior upgrade, you will discover this guide quite useful.

Figure : How a Version 2 Electric Motor Gearbox Works
Source: By Ranger Captain at English Wikipedia Later versions were uploaded by Boffy b at en.wikipedia. (Transferred from en.wikipedia to Commons.) [Public domain], via Wikimedia Eatables

The process of diagnosing a harness problem may cease up beingness quite hard and for that reason, nosotros'll first by highlighting a couple of issues on a diagnostics checklist. Then, if you have a damaged switch associates, information technology could pb to bug such as;

losses in the semi-automated firing,
an excessively long pull of the trigger, a runaway gun
no firing at all.

If yous experience any of the to a higher place issues, here are a couple of things yous should do earlier anything else:

Cheque the fuse and ensure that it is nevertheless intact and it works properly
Ostend that the battery is fully charged
Side by side, counter-cheque any of the gun's connections. For instance, the motor connection. In some guns, an inline connector is placed in the wires for easier and faster dismantling either in the fore grip or stock.
If everything else is right and things signal to the AEG wire harness, you should only get information technology out; and the wire harness is what nosotros'll comprehensively comprehend in this dossier.

Here, nosotros are going to accept the V2 gearbox apart, identify the issues, set them and put it back together. Since there are a wide range of ways in which each gun tin be disassembled, let's just jump right to the part of dismantling the gearbox. Let'due south get right to it!

Technical Outline

OBJECTIVE: To Supervene upon the Wire Harness of an AEG
DIFFICULTY LEVEL (on a scale of i-ten): half dozen
DURATION: 40-50 minutes

Required Tools

Flat head screwdriver
P2 Phillips screwdriver (large)
P1 Phillips screwdriver (small-scale)
2mm hex for sliding into the jump guide when stabilizing the gearbox

Required Replacement Parts

Wiring harness and V2 Plunger
Raptors Airsoft DeepFire Switch Assembly

Process:

STEP A:

Start by taking off the bolt catch in case there is ane. On this detail VFC gearbox, in that location is a bolt take hold of. Use the P1 screwdriver to dismantle information technology from its retaining screw. Be very keen so that y'all don't lose the tiny jump that lies beneath. Only after that, undo all the other gearbox shell screws with the big screwdriver. Other gearbox brands may have 2mm Torx or hex type screws.

STEP B:

Disassemble the halves of the gearbox then take out the internal components. To prevent the spring guide from flying out, identify a 2mm hex wrench through it and so take off the elevation half of the gearbox using your other costless manus. Place it aside and then take the spring out slowly. After doing that, take out the piston, nozzle of the cylinder and the tappet all in one piece. Be careful not to lose the spring of the tappet. Remove the airsoftgears while staying on loftier alert to keep the gear shims in their proper identify. After that, detach the AR (anti-reversal) latch and the bound.

STEP C:

Hither comes the most interesting role; identifying the trouble. Some of the things you should continue an center out for in terms of damage include:

The 2 contumely tabs on your plunger associates could be bent autonomously and thus non making proper contact with the plunger (the small movable part) itself
The tabs could be fried completely
Broken return spring on the upper department of the unit
The tiny notch on the back side may be mashed up from the cut-off lever, thus preventing semi-car

STEP D:

If y'all are lucky, you could shorten the pull on the trigger only by pushing the two contumely tabs slightly closer to each other to make the circuit close sooner. However, exist careful not to overdo it since it could lock the plunger in place leading to much longer fires than ideal. On the other manus, in case the unit of measurement is in a poor condition, melted or completely fried, yous will exist better off when you replace it. If your wiring is nonetheless in great status, just change this area past soldering out the old unit, prepare the new unit in and solder information technology back to the wires.

Footstep E:

In case y'all are replacing the new wires and wiring harness, make certain that you properly insert the wires in the gearbox. The wire that crosses the gap shut to the motor should be kept below all the other wires. In addition, be certain to push the wires deep enough into the grooves when you lot set them but take caution so that you lot don't strip them or impairment them in whatsoever other way. If you damage them in that procedure, it could lead to a agglomeration of other issues such as damaging the new harness, your battery or fifty-fifty worse, the gun could take hold of burn down on its own!

Footstep F:

Confirm that you have secured all the parts properly and the leads of the motor are placed where they should be. The red wire should exist at the front while the black wire is supposed to be at the back. You should also brand sure that the right connector is also in identify, whether you employ Deans or Tamiya.

Footstep Yard:

After everything is in place, reassemble the gearbox component and screw it up. Ensure that you marshal every component properly and that the shims are in their proper place. Gently tighten up the screws of the gearbox besides as the bolt catch.

Footstep H:

To test the gearbox wiring, attach the power wires to the battery and so connect the other finish to the motor. To prevent the pinion gear from striking stuff, agree the motor in place. Fire up the trigger and if the motor turns over, and so everything is correct, you can proceed with the assembly. In case the motor doesn't plough over, counter-cheque all the connections and check to ensure that the plunger is able to slide at will in and out of the tabs of the trigger. If everything else checks out after that, continue re-assembling the remaining components of your AEG and you can hit the field over again whenever you want.

Actress AEG Tips for Boosting Performance:

Capacitor Banks

Ane of the best ways of boosting your rate of fire and trigger response, is past use of Capacitor Banks. Electrolytic capacitors are essential in the storage of energy and releasing in on demand. This is what will accommodate for the voltage drops that occur right afterwards your initial pull of the trigger and when the AEG cycles through shots.

Figure : Axial Electrolytic Capacitors
Source: Mataresephotos , Axial electrolytic capacitors , CC Past 3.0

During the voltage drops, the capacitor volition release its stored energy and thus smoothen out the current. Afterward the voltage driblet passes, the capacitor will fill up once more. However, the improvement is rather minimal and for a significant difference and you are going to need a pretty huge banking concern. You should yet notation that not all AEGs volition have plenty room for this extra fitting. If you accept enough room to fit them in, there are virtually no downsides in using them.

How to Install a Capacitor Bank

Installation is quite elementary, here is what you lot should practice:

Step A:

Find a suitable location for them.

Pace B:

Start soldering them in parallel connection to the excursion of your AEG wire system

Stride C:

Since the capacitors are polarised, make sure yous get the polarities right. If you aren't sure, you can tell the negative (-) concluding by confirming that information technology has a stripe that runs down the cap on one side.

NOTE: Make your capacitor banks removable then that you can hands switch them from one gun to another.

Mosfets

In AEGs, a mosfet is a switching transistor capable of handling high loads and transmits uncommonly low internal resistance. Some of the master benefits of mosfets include:

Heave ROF
Provides allowance for the apply of batteries with higher voltages
Prevents burning up of trigger contacts
Enhance trigger response
Powers up your electrical organization'due south overall efficiency

With some soldering skills, information technology is quite piece of cake to make a Mosfet unit. Here's how you can do it in like shooting fish in a barrel steps.

Figure : MOSFET
Attribution: CyrilB~commonswiki assumed (based on copyright claims)., D2PAK , CC BY-SA iii.0

How To Make and Add A Mosfet Unit of measurement

Technical Outline

OBJECTIVE: To Make and add together a Mosfet Unit to an AEG
DIFFICULTY LEVEL (on a scale of one-10): 7
Duration: 50 minutes – 1 hr

Required Tools

Soldering iron
Flux
Sandpaper
Heat compress tubing (in various sizes)
Wires (for the motor and gate) and Wire Strippers
Voltmeter
Gum Gun
Rut Gun
Helping Paw Tool
Pliers
Wet Cellulose Sponge

Required Parts

Ii 100Ω resistors
2 twenty-30kΩ resistors (pull-down resistors)
A Suitable Due north-Channel Mosfet (ideally IRL1404z)
N-aqueduct and P-channel Mosfet (for AB organisation)

Figure : Resistor
Source: Nunikasi , Resistor , CC By-SA 3.0

Figure : Northward-Aqueduct Mosfet
Source: Marvelshine , MosfetHYPERLINK "https://eatables.wikimedia.org/wiki/File:Mosfet_n.JPG" n , CC BY-SA 4.0

Figure : P-Aqueduct Mosfet
Source: Marvelshine , MosfetHYPERLINK "https://commons.wikimedia.org/wiki/File:Mosfet_p.JPG" p , CC Past-SA 4.0

Procedure

STEP A:

Cover the Mosfets heatsink with rut-compress tubing to prevent shorting anything only by touching it since the heatsink and the Drain pin contain an equivalent electric value. Add some heat-shrink tubing to the pull-down resistor too.

STEP B:

The Mosfet has 3 pins, the Gate, the Drain and the Source. Join the insulated pull-downwardly resistor between the Gate pin and the Source pin and so attach the 100Ω resistor to the gate pivot.

Pace C:

De-solder each of the trigger contacts and so attach a gate wire (you can use the tiny wires found in an Ethernet cable) to each of the contact tabs.

STEP D:

From at that place, add new wires straight from the battery all the style to the motor. Don't forget to utilise heat-shrink tubing also.

STEP East:

Observe a spot to put the Mosfet unit then clip the negative wire into two halves. Take the half running to the motor and attach it to the Drain pin of the Mosfet. From in that location attach the other half of the negative wire (which goes all the way to the battery) to the Source pin of the Mosfet. Lastly, join one gate wire to the Mosfet's gate resistor and then connect the other gate wire someplace into the positive (+) wire. Your Mosfet system is complete!

NOTE: Before yous forget, you lot should also include agile breaking (AB) so that the motor stops the moment you release the trigger. Autonomously from creating a super-crispy trigger pull, active braking helps in keeping the piston forward to preclude exerting unnecessary stress on the gears for instance. Then, to add active breaking, you should connect a P-channel mosfet. At that place are so many manner of doing this and one of the simplest ways is every bit indicated in the steps that follow.

Pace F:

Join the Northward and P-Aqueduct Mosftets by gluing them together back to back and so bend the Gate pin of the P-aqueduct to run across upwards with the Gate pivot of the N-channel. Bend both Drain pins (center pins) of the N and P-Channel Mosfets together so join them with a quick solder.

Footstep Grand:

As usual, start by adding some oestrus-compress tubing to a pull-down resistor then add together it between the Gate pin of the Northward-channel and its Source Pivot. Once again, just similar in your main Mosfet Unit, add the 100Ω resistor to the Gate pin of the N-channel mosfet. Finally, just wire this active braking the aforementioned way y'all did in your principal Mosfet unit; the only difference existence that the Source pin of the P-channel is the i that y'all should join to the positive wire.

You are now good to get with your powered-up arms!