Cybergun F2000 (Cyma) - Internal upgrades / tinkering

[Asomodai]

Lonex hop unit. But get a Prometheus purple or Guarder clear bucking. 

There is no need to get a separate nub as most buckings come with a nub. The only bucking I know that doesn't come with a nub are the G&G ones. 

 

[RostokMcSpoons]

Hop unit and bucking arrived and fitted!

I actually just got the Lonex bucking as Airsoft World were cheap for the hop unit and p&p, and I could get the Guarder off eBay later (£6 inc p&p) if needed.  It's 50deg, and seems nice and flexible - especially compared to the stock item that feels like it designed to survive being nuked from orbit

A quick fire test fire in the garden was successful!  I could see a difference between hop off and half-on, and it was back to feeding well, whereas it wasn't after my field tech experiment at the weekend (I tried to reinforce the nub, and then tried to pack the bucking window with a bit of thin plastic film.  Both caused feeding problems)

Obviously there's a difference between my room temperature gun shooting at 15m, compared to out on site at 30+m, but I have a better feeling about it.

------

An issue arose though.  I plugged in my Titan 7.4v Li-Ion battery, and it wouldn't shoot.   It (the battery) seems to be dead in fact.  I can't get it to charge.  I suspect my second warranty claim won't be entertained as successfully as the first

Is the High Torque motor the cause?  Will I need to drive it with an 11.1v now?

 

[Adolf Hamster]

do you have a voltage checker see what the cell voltages are?

not sure which charger you're using, but i've seen it happen before where a charger has failed to charge one of the cells and killed the battery.

i use an etronix battery doctor (other brands are available) and it's a helpful reassurance even for just checking "did i remember to charge this?" before game day.

 

[RostokMcSpoons]

Yeah I have one of those little Amazon jobbies...

View attachment 84705

Not a peep (or indeed a beep) out of it... 

Tried charging with my new SkyRC T100 (which is how I charged it initially) and in desperation the old ASG Balance Charger too.  Nothing doing

The T100 reports "Connection Break"

 

[Adolf Hamster]

Hmm, may be lost connection to/between one of the cells.

Tbh, i'm not one for some of the "fixes" folk do for batteries, i just get new ones if there's an issue. Although admittedly i've also been mostly lucky with them.

 

[RostokMcSpoons]

Hmm, may be lost connection to/between one of the cells.

Tbh, i'm not one for some of the "fixes" folk do for batteries, i just get new ones if there's an issue. Although admittedly i've also been mostly lucky with them.

Click to shrink...

I've fired off an email to Titan, to see if the customer service people have any suggestions. It'll be bloody annoying if I can't get it fixed / replaced, the 7.4v Li-Ion is ideal for my non-Mosfet F2000 if it's enough to drive that motor.

But if I do have to go the Mosfet route... I'm thinking the Perun AB++ and a bunch of Turnigy Nano-Cell 11.1v sticks should see me all right