Login or Sign Up
Logging in...
Remember me
Login
Forgot password or user name?
or
Sign Up
Log in with
Forums
Classifieds
Groups
Zero One Airsoft
Ground Zero Airsoft
Airsoft Festival
Today's Posts
|
Member List
|
Calendar
|
Forum Rules
|
Forum
Airsoft Related
Technical Help
Tech - Electric Guns
Announcement
Collapse
No announcement yet.
Zero One Ads
Collapse
problem after mosfet installed
Collapse
X
Collapse
Posts
Latest Activity
Photos
Search
Page
of
1
Filter
Time
All Time
Today
Last Week
Last Month
Show
All
Discussions only
Photos only
Videos only
Links only
Polls only
Events only
Filtered by:
Clear All
new posts
Previous
template
Next
Garrym
Cadet
Join Date:
Aug 2012
Posts:
10
Share
Tweet
#1
problem after mosfet installed
20 September, 2012, 19:44
hi guys, running a classic army m4 cqb navy seal, bought it used and its had internals upgraded (not exactly sure in what way) one thing i do know though is it came with a mosfet kit and got it installed and gun fires for a short time then stops, felt the motor getting really hot and the mosfet chip got a little hot. Any ideas whats causing it to heat up and stop? I initially had problems with the mosfet shorting out but got that sorted now i have this...help! incase this matters, the motor is a high performance high torque classic army motor.
Cheers
Garry
sparrowhawk
General
Join Date:
May 2008
Posts:
6191
Share
Tweet
#2
20 September, 2012, 20:30
Re: problem after mosfet installed
what battery,grade of wiring and connectors are you using
VICTORIA CONCORDIA CRESCIT
LOOKING FOR: S&W N-frame holster
trader feedback
http://forums.zeroin.co.uk/itrader.php?u=5191
Comment
Post
Cancel
Garrym
Cadet
Join Date:
Aug 2012
Posts:
10
Share
Tweet
#3
20 September, 2012, 21:08
Re: problem after mosfet installed
2200ma bat on deans Not sure on the wires its the ones came with it the mosfet is extreme fire sw-ab-long
Comment
Post
Cancel
sparrowhawk
General
Join Date:
May 2008
Posts:
6191
Share
Tweet
#4
20 September, 2012, 21:40
Re: problem after mosfet installed
is that a lipo battery
VICTORIA CONCORDIA CRESCIT
LOOKING FOR: S&W N-frame holster
trader feedback
http://forums.zeroin.co.uk/itrader.php?u=5191
Comment
Post
Cancel
Genista
Captain
Join Date:
Jan 2010
Posts:
665
Share
Tweet
#5
21 September, 2012, 10:03
Re: problem after mosfet installed
That mosfet has thermal, resetting fuses. Sounds like you are tripping them. A high torque motor will be pulling extra current from your battery, so there could be a mismatch/over current situation making the mosfet go in to protect.
You're either looking for part of the system that is under too much strain or possibly another wiring shorts.
When it shoots, does it sound ok? does it turn over quickly, or is it slugish?
What FPS is it shooting at?
Could even be a poor shim job.
Originally posted by
TLSFx on the misuse of pyros
Never wave them at police firearms response teams. Those people have (real) guns and no sense of humour.
Comment
Post
Cancel
Garrym
Cadet
Join Date:
Aug 2012
Posts:
10
Share
Tweet
#6
21 September, 2012, 13:59
Re: problem after mosfet installed
I'm running a standard ni-cad batter its a 2200 though so its quite big. the battery and the motor were working on the older wiring without a problem but when the mosfet went in this has happened.
Its firing fine for the first sounds fine, fires crisp n sharpe for first few then cuts out not sure on the fps but hitting a can with it and it dented the can at the corner of it where it gets fat so it seems to have a bit of power to it
Comment
Post
Cancel
sparrowhawk
General
Join Date:
May 2008
Posts:
6191
Share
Tweet
#7
21 September, 2012, 17:02
Re: problem after mosfet installed
You could contact extreme fire direct,the fella who produces them is very helpful
VICTORIA CONCORDIA CRESCIT
LOOKING FOR: S&W N-frame holster
trader feedback
http://forums.zeroin.co.uk/itrader.php?u=5191
Comment
Post
Cancel
No1_sonuk
Brigadier
Join Date:
Dec 2009
Posts:
2691
Share
Tweet
#8
22 September, 2012, 01:02
Re: problem after mosfet installed
If the motor stops and gets hot, it's probably stalled due to a mechanical fault, or not enough current getting to it to rotate, but enough to heat up the coils.
Comment
Post
Cancel
Samwise
Cadet
Join Date:
Sep 2012
Posts:
11
Share
Tweet
#9
24 September, 2012, 02:06
Re: problem after mosfet installed
Its very unlikely to be a fault with the MOSFET; the guy who makes them basically invented them (for airsoft) and pretty much never sends out dud units.
He's the most helpful guy on the planet though, so dropping him a line would be a good move too.
Something in your setup would seem to be causing excessive resistance.
This will cause a build up of heat which will (helpfully) trip out the FET fuse.
The usual culprits are tight shimming, the motor sitting too high, poor soldering/inappropriate wire or a short-circuit.
Can you give us some more info on exactly what was wrong with the MOSFET install last time?
Were some of the wire ends not in the screw terminals properly and shorting against each other?
Comment
Post
Cancel
mirlock
Captain
Join Date:
Dec 2010
Posts:
535
Share
Tweet
#10
25 September, 2012, 14:51
Re: problem after mosfet installed
as he said up there ^^ but also check pinion gear and bevel gear line up etc.
this will cause the motor to run hot and trip the mosfet
Dont Eat What You Cant Fry
Comment
Post
Cancel
Garrym
Cadet
Join Date:
Aug 2012
Posts:
10
Share
Tweet
#11
27 September, 2012, 09:54
Re: problem after mosfet installed
hi guys thanks for the help, it ended up being wiring had a tiny little cut in it and when it was put together it opened more and had contact with the body, a royal pain in the ass, so I've just rewired the lot seems to be running fine....until i broke the connector to the motor so had that put back on and will test her out tonight and fingers crossed shes fixed for at least to get me through a game not had a full skirmish day yet. if anything else goes wrong i'll be checking the rest of the info you've said. Thanks again guys!
Comment
Post
Cancel
Previous
template
Next
About the Author
Collapse
Find out more about
Garrym
Working...
Yes
No
OK
OK
Cancel
X