I've just started with airsoft and I already encountered a problem which I can't seem to solve myself.
I hope I'm posting in the right section, sorry if not :-)
So, I bought a nice Cyma M14 or 'CM.032' the one with the long barrel. I read some good and positive reviews about the gun, I liked the looks and it was within my budget for a first gun.
I bought it online, coming from Poland: http://www.taiwangun.com/en/cm-032-wooden-style-cm
The first few days it worked as good as I suspect it should be working. I had quite some fun shooting targets and stuff. I didn't even have to adjust the hop-up; it was set well by the testing team before shipping.
One morning however, it just stopped working. So I took it apart! I only heard a clicking sound which later on I discovered was from the motor-bevel pushing the motor away from where the resistance came - the gearbox.
The Cyma M14 uses a v.7 gearbox which looks respectively from the outside and inside like this:
(I cleaned out the green snotty grease and use something else instead now)
a little closer on the gears:
and with the 3 gears taken out (+ the anti-reversal-latch):
Also, I have no idea what the little wedge shape is doing on the 'bottom' of the last gear:
I use the battery that came with the package, an 8.4V Ni-MH 1100mAh (not 1200 which the site I bought it from states)
From the motor itself I have no info, only that I can adjust the motor height on it's rear end:
So what happens if I close the contacts is: A short moment of noise, which I believe is the motor and gearbox spinning and slightly putting pressure on the spring. Then the 'clack' when the whole thing seems to get locked halfway through the cycle.
I checked inside to see if anything was obstructing the movement but saw nothing I could deduce the cause from.
I tried adjusting the motor height which resulted in either the idle spinning of the motor or locking the entire thing.
Also, I tried to go through the cycle with only my fingers powering the 1st gear, which was impossible because of the high torque caused by of the spring compression. (is the motor really so strong that he can overcome that? :O)
If there'd be an internal jam, could it be the anti-reversal latch, the tappet plate, the piston coming out of his guiding rails? it all seems unlikely when I see how well the housing is closed. might it have to do with 'shimming'? (didn't have troubles the first few days though).
I fully loaded the battery before testing again but nothing's changed.
If anyone has any ideas on what could cause this locking, I'd be so happy to hear about it !!
(I can post more info and photo's if it helps)
Thank you :-)