Thread Tools
Aug 25, 2018, 04:46 PM
USAF Vet Senior Member
peterv's Avatar
Thread OP
Well, problem solved for now. Changed the servo agein to a tower pro SG90MG. All vibration is gone and yaws well. Funny I did that a few months ago. Let's see how long this lasts!
Sign up now
to remove ads between posts
Aug 29, 2018, 10:07 AM
USAF Vet Senior Member
peterv's Avatar
Thread OP
New Props arrived! Received 7x4.5x3 blade props from China. Quiet but not as powerful as the 8x4.5x2s. Hovers and lifts at 50% throttle while the 8x4.5 lift and hover at 40% throttle. Quieter and motors are almost cool after a 10 min flight. With the 2 blade props motors were hot. Run time with a 3S 2200 ma battery the same 10 minutes.
Sep 13, 2018, 02:55 PM
USAF Vet Senior Member
peterv's Avatar
Thread OP
Switched PIDs to CleanFlight stock. Not bad, just vibrations at times and sometimes not. Slight jitter when armed but stops when disarmed. Flies really well with crisp yaw control and no overshoot when a quick yaw is given. Funny my other two Tris have the same amount of play on the tail but do not jitter.
Oct 07, 2018, 10:31 AM
USAF Vet Senior Member
peterv's Avatar
Thread OP
Changed servo to a TowerPro S91 digital. Set servo PWM to 300. After a few adjustments seems perfect!
Oct 12, 2018, 11:26 AM
USAF Vet Senior Member
peterv's Avatar
Thread OP
10 Flights. No servo jitter! Digital was the way to go. Much less gear lash. Perfect flight performance. Slight jitter when armed which disappears when motor starts.
Nov 05, 2018, 02:16 PM
USAF Vet Senior Member
peterv's Avatar
Thread OP
I give up! After about 25 flights jitter is back at arming and in flight. Not too bad but now I notice more play on the yaw mount/servo. Was very minimal when servo replaced, a metal gear digital.
Guess I will just live with it.
Nov 17, 2018, 09:29 AM
USAF Vet Senior Member
peterv's Avatar
Thread OP
Come to the conclusion vibration is causing the tail jitter. If I hold the TRI tightly no jitter, loosen my grip and jitter starts.
Props are all balanced. Ordered several type of vibration mounts for the FC from RaceDayQuads. Will try when they arrive.
Nov 19, 2018, 12:02 PM
USAF Vet Senior Member
peterv's Avatar
Thread OP
Placed rubber isolator grommets after trimming out mounting holes on the FC. A little better. Servo still has more play than when I first installed it. Have two spare digital metal gear servos.
May change it out soon. TRI still flies fine although servo vibration is visible. Possible vibrations wore down the servo? Maybe with isolation a new servo will work.
Last edited by peterv; Mar 02, 2019 at 01:31 PM. Reason: spelling
May 10, 2019, 06:47 PM
USAF Vet Senior Member
peterv's Avatar
Thread OP
New problem! Changed servo to a HiTec carbonite. Changed direction in CLI. No shake and no play. So far OK. However while flying whenever I pitch forward or back more than a bit the Tri yaws. Checked mixers in my Taranis X9D and no mixing going on. Checked CleanFlight and do not see anything strange.
Any ideas?
May 13, 2019, 12:41 PM
USAF Vet Senior Member
peterv's Avatar
Thread OP
Problem solved. Went to default PIDs. New problem cropped up. Goes into a spin after a few minutes. Noticed yaw prop at the end of throw. New yaw mech which from an unbuilt HJ I purchased for the new servo was reamed out to fit the spline of the HiTec servo was loose.

Removed the 2 servo spacers and jammed the servo gear in and seems fine now.
Yaw control is excellent. Snaps to a stop with no overshoot after a yaw command.
May 22, 2019, 10:25 AM
USAF Vet Senior Member
peterv's Avatar
Thread OP
However after a hard landing where tail rotor shifted to the end the tail would not center. Yaw servo gear did not move. That servo has no play and cannot be moved by hand or accident. Manually centered motor mount and pressed in to the gear, all was good.
That Hitec karbonite servo is one tough to move servo unpowered. The Tri does fly excellent though!


Quick Reply
Message:

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion HJ tricopter peterv Tricopter Drones 25 Oct 06, 2018 07:33 PM
Mini-Review HJ-Y3 Little 300mm Tricopter! This thing is awesome! chanyote66 Mini Multirotor Drones 372 Dec 17, 2016 06:27 AM
Help! HJ Y3 Tricopter Servo Problem robleedroid Tricopter Drones 0 Apr 12, 2015 10:24 AM