|Aug 11, 2003, 05:28 PM|
Boulder Municipal, Colorado, United States
Joined Sep 2001
Please Help! Slow Stick Problem with JR radios
Anyone else experience a problem with the motor cutting out when using a JR radio?
JR Quatro Lite with an MPI 8A ESC, and 7C 720MaH pack
The motor cuts out, like the ESC is kicking in. If I remove all the equipment from the plane, the motor run time is normal. I've replaced all components, including another Quattro Lite, and an older JR radio, a 7C 500MaH nicad, a GWS 15A, and Castle Creations 35A ESC, all resulting in the motor cuts out if the setup is installed in the plane. Take it off the plane, run time is normal.
Hitec Laser 4 with the same MPI ESC and 720MaH pack
Motor run time is normal.
QUESTION? Can the metal tube of the Slow Stick be interferring with the negative shift of the JR Radio?
Or, any other ideas?
|Aug 11, 2003, 06:17 PM|
okay first off JR is positive shift as is GWS and airtronics
futaba and hitec are neg.
i have an SS and quattro lite that i fly all the time with no problem
8 amp esc is a little low (actually minimum) for the SS motor and 10 amp would be better.
but if you have the same problem with the gws 400 esc....you may have a faulty/ funny RX. or your trying to run a neg shift rx with a pos shift tx
|Aug 11, 2003, 07:30 PM|
Oxford (UK) and Mtn View CA (USA)
Joined Nov 2002
Sounds like the proverbial "loose connection".
FWIW: I use JR radio (TX + RX) on a Slowstick very happily. Its probably one of those annoying-but-simple problems - I have those often!
|Aug 12, 2003, 08:32 AM|
Joined Aug 2003
I had the same problem with my Slow Stick. Changed ESC, swapped out radio, batteries also but no luck. Then while I was duplicating the problem on the bench I noticed that if I touched the metal fuselage of the SS the servo jittering and cutouts stopped. After some experimenting I think I have a fix. I soldered a small piece of wire to the motor case and then soldered (I used a small screw to secure) to the fuselage.
The problem seems to be fixed!
I'm not sure what's going here but this seems to point at the noisy (RF speaking) stock motor and the metal fuselage somehow generate or amplify inteference. Anyway give it a try and see. Good Luck
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