Airsoft Canada - View Single Post

MaciekA · March 25th, 2012, 23:30

You are going to need to step back and address each issue one by one.

If you are new at this, then the symptoms you are reporting are going to be confusing and may lead you down the wrong path. There's a way to fix this, and a gun doctor will find it fairly fast. If you want to figure it out yourself though, it'll take a bit of time since you may have multiple issues. If it's true that this gun is "almost fully custom built" and it is exhibiting issues like the ones you describe, it seems likely that at least some of the parts were poorly selected, matched, and installed.

I am unsure what your skill level with mechbox maintenance is, but some of your statements above contradict each other and suggest some very weird stuff going on.

For example, there is no way your motor should be "bouncing and clonking" if it's the case that the "height is properly adjusted".

Screeching noises are generally a sign of improper motor alignment and either incorrect shimming or lack of shimming. Your o-ring could be as dry as the desert, but if your shimming and motor height are correct, it will sound absolutely fine.

In general, you should not be placing any styrofoam or anything of the sort into your grip. If you are able to do this and actually impact the placement of the motor, then something is probably wrong. The grip in a V2 setup typically functions as a guide for the motor -- once you have the grip closed, it is essentially like a V3 motor cage -- your motor should NOT move much, if at all, because if it could this would spell trouble for your pinion and bevel gears.

Off the top of my head, here are some possibilites:

Your grip's height adjustment plate might be missing.
Your motor is the wrong length.
Your motor's pinion is too high or two low on the shaft and/or has been paired with a grip that is too different in spec.
You are not closing your grip correctly.
You are routing the wires through your grip incorrectly.
You haven't screwed the grip in all the way to the mechbox or used screws that are too long.
Your grip can't contact flush with the mechbox due to fitment issues, and there may be a gap between the grip and the mechbox's pinion-hole face (this issue is far more common than you might realize).
The "clonking" is in your head. You have a bevel gear with a very small number of anti-reversal teeth (i.e. G&P's bevel gears are like this). After firing a shot, your bevel gear reverses a bit and you hear a "clonk". VERY common. I have a teammate's G&P rifle on my work desk this week that exhibits this quirk. Completely normal.
You have an anti-reversal latch issue. Something similar to the above point.

Some of the things you've said in your post raise some alarm bells and make me wonder if you went too far with your custom build before learning the basics. For example, I don't recommend firing an AEG with a barrel plug to "simulate the compression of a BB in the barrel". If you manage to pull off this kind of compression simulation and the plug is unable to eject, this is an excellent way to strip a piston.

What you should do next is do a basic test for us: Fire one full mag of BBs out of this gun in semi and tell us if it at least works properly. Do a few bursts too. Count the BBs or ideally try to chrono the gun. At that point, if you're still unhappy with the sound and vibration of your motor, I suggest posting a video or audio recording of the gun in action so that we can assist you in troubleshooting this issue.

Hope that helps

March 25th, 2012, 23:30	#2
MaciekA Trader rating Join Date: Jun 2011 Location: Portland, Oregon, USA	You are going to need to step back and address each issue one by one. If you are new at this, then the symptoms you are reporting are going to be confusing and may lead you down the wrong path. There's a way to fix this, and a gun doctor will find it fairly fast. If you want to figure it out yourself though, it'll take a bit of time since you may have multiple issues. If it's true that this gun is "almost fully custom built" and it is exhibiting issues like the ones you describe, it seems likely that at least some of the parts were poorly selected, matched, and installed. I am unsure what your skill level with mechbox maintenance is, but some of your statements above contradict each other and suggest some very weird stuff going on. For example, there is no way your motor should be "bouncing and clonking" if it's the case that the "height is properly adjusted". Screeching noises are generally a sign of improper motor alignment and either incorrect shimming or lack of shimming. Your o-ring could be as dry as the desert, but if your shimming and motor height are correct, it will sound absolutely fine. In general, you should not be placing any styrofoam or anything of the sort into your grip. If you are able to do this and actually impact the placement of the motor, then something is probably wrong. The grip in a V2 setup typically functions as a guide for the motor -- once you have the grip closed, it is essentially like a V3 motor cage -- your motor should NOT move much, if at all, because if it could this would spell trouble for your pinion and bevel gears. Off the top of my head, here are some possibilites: Your grip's height adjustment plate might be missing. Your motor is the wrong length. Your motor's pinion is too high or two low on the shaft and/or has been paired with a grip that is too different in spec. You are not closing your grip correctly. You are routing the wires through your grip incorrectly. You haven't screwed the grip in all the way to the mechbox or used screws that are too long. Your grip can't contact flush with the mechbox due to fitment issues, and there may be a gap between the grip and the mechbox's pinion-hole face (this issue is far more common than you might realize). The "clonking" is in your head. You have a bevel gear with a very small number of anti-reversal teeth (i.e. G&P's bevel gears are like this). After firing a shot, your bevel gear reverses a bit and you hear a "clonk". VERY common. I have a teammate's G&P rifle on my work desk this week that exhibits this quirk. Completely normal. You have an anti-reversal latch issue. Something similar to the above point. Some of the things you've said in your post raise some alarm bells and make me wonder if you went too far with your custom build before learning the basics. For example, I don't recommend firing an AEG with a barrel plug to "simulate the compression of a BB in the barrel". If you manage to pull off this kind of compression simulation and the plug is unable to eject, this is an excellent way to strip a piston. What you should do next is do a basic test for us: Fire one full mag of BBs out of this gun in semi and tell us if it at least works properly. Do a few bursts too. Count the BBs or ideally try to chrono the gun. At that point, if you're still unhappy with the sound and vibration of your motor, I suggest posting a video or audio recording of the gun in action so that we can assist you in troubleshooting this issue. Hope that helps __________________ "Mah check" Now you know Last edited by MaciekA; March 25th, 2012 at 23:34..