JR 3021 Servo Problem
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JR 3021 Servo Problem
Hey Danny,
I recently purchased two 3021 servos and installed them in a 60 size pattern plane on the ailerons. I use a 6v system with a regulator and a Futaba PCM receiver. I got only 5 flights before one of the servos began to jitter. When I hold the aileron, the servo jumps around. This problem became noticeable in flight, with the plane also jumping.
I would like to make sure that the 3021 can handle 6 volts, and where to send my servo for repair. I have my receipt and believe this should be a warranty repair.
Thanks,
Lem
I recently purchased two 3021 servos and installed them in a 60 size pattern plane on the ailerons. I use a 6v system with a regulator and a Futaba PCM receiver. I got only 5 flights before one of the servos began to jitter. When I hold the aileron, the servo jumps around. This problem became noticeable in flight, with the plane also jumping.
I would like to make sure that the 3021 can handle 6 volts, and where to send my servo for repair. I have my receipt and believe this should be a warranty repair.
Thanks,
Lem
#2
RE: JR 3021 Servo Problem
The 3021 servo was discontinued some time ago and replaced with the 3121, you can send the servo in for service along with a proof of purchase. It may be possible for it to be warranty, however the 3021 is not really the best choice for that size model. I would recommend stepping up your servos up to say a 9411/9411SA or higher to better handle the load of the surface. Set up properly, a 3021 may be ok for that size plane provided your mechanical set up is correct (mechanical advantege set properly), but your servo life will be reduced. If your model is not set up correctly, there is higher potential of failure.
http://horizon.hobbyshopnow.com/medi...rchecklist.pdf
http://horizon.hobbyshopnow.com/medi...rchecklist.pdf
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RE: JR 3021 Servo Problem
Thanks Danny,
I will send it in to Horizon. The servo package says the torque on this servo is 3 kg-cm, which is a little over 41 oz-inch by my calculation. Also, I have it set up with significant mechanical advantage. The linkage is on the innermost position on the servo arm and I have a large control horn on the ailerons. This is a 60 size pattern ship that requires very little aileron movement.
Lem
I will send it in to Horizon. The servo package says the torque on this servo is 3 kg-cm, which is a little over 41 oz-inch by my calculation. Also, I have it set up with significant mechanical advantage. The linkage is on the innermost position on the servo arm and I have a large control horn on the ailerons. This is a 60 size pattern ship that requires very little aileron movement.
Lem
#4
RE: JR 3021 Servo Problem
It should work ok, but it would really be best to use a larger servo to reduce the workload of the servo to get longer servo life. The 3021 is really a little small for an aileron of a 60 size pattern plane.