|
MikeMayberry -> Another HS-5625 Failure -- This one from Jan 02 Lot (2/5/2003 12:27:36 AM)
|
I know that many of you are looking for Hitec to come out and say "Yes, there was a problem and it has been fixed." Sorry, that is not warranted here. We have reported what has been posted here to our engineers and they have done extensive testing with no results that show there is a design flaw or software problem. In fact, the return rate of the 56XX servos is no different than that of the 605/615 servos, the platform for the 56XX series servos, that have been sold for years. These servos continue to be among the most popular servos that Hitec sells.
Hitec is aware that the 56XX's are now being used in even bigger, more expensive airplanes than the 605/615's, so when a failure does occur the loss is much greater than that of airplanes in the past. And now... with forums such as this, these failures are brought out into the open to discuss. I also know that the other servo manufactures have similar failure rates but it seems people are less likely to talk about them as they are with Hitec. This is, I feel, a side affect due to our lower cost.
We strongly feel that the 605/615/625/645/5625/5645's are "Sport" level servos. That is not to say that they CANNOT be used in larger aircraft but that there is a better choice with the 59XX series "Premium" servos that were specifically designed for the abuse that these larger planes can dish out. I look at it as using the right tool for the job. I get questions every day asking can I use “X” servo in “Y” application and in some cases I have to say “Yes, it will work but there is a better choice; I would recommend _____” Fill in the blank.
In the 25% and larger airplanes, the 5945's are quickly proving that they are up to the task and when compared to their competition they really shine. The gears don’t wear out after 40-50 flights, they don’t oscillate around center and need to be sent in to have the gain turned down (whatever that means) and you don’t need to use any additional devises if you are ganging servos on one control surface as with the competition. I strongly recommend them in the larger planes as they are not only the right tool for the job; they are best, most versatile high performance servos on the market today!
In many of these cases the set up can be the problem, so... let's look at some of the things that we have discovered can potentially cause problems:
Digital servos require more power and if the conduit that supplies that power is limited, then the servos will not function properly. This can be due to the use of a regulator or long extensions of a Y-harness. Hitec makes heavy duty 22 gauge extensions and Y-harness that have proven to provide the power needed for the digital servos; standard 24 gauge wire is not enough and should not be used. If you are running multiple servos per control surface then you should be using more than one battery and potentially more than one receiver so the servos can get the power they need.
I would like to know how the servos were wired in the cases where they failed; was there a y-harness, extension (length?) and or regulator being used? What size? There was a report that one servo failed on a control surface, then another was installed and it failed. This sounds like a problem with the installation or wiring. The chance of two servos failing back to back like that is rare. Be aware that there are many things to consider here and only one of which is the servo.
I was not aware of the issue with the cold weather that was discussed so I will pass that information on and see what we can come up with.
Mike.
|
|
|
|
