Having a problem and I’m stumped.
Bought a set of all-metal , 120 size w/ 5mm pin servolless retracts from HK for my Piper Cherokee/Arrow conversion. All was working okay until the nose gear stopped working . Nada. No power, nothing.
I pulled it out. Went to buy another HK nose gear but they don’t sell them separately. Go figure.
So I bought a stand-alone 120 size nose gear from PW-RC. Bench tested then installed in plane.
Reconnected 3 way“Y” connector , flipped the gear switch and ? The mains go up while the nose gear goes down and vice a versa. Tried swapping leads around and same thing. Tried plugging in nose gear alone to get it in synch and it doesn’t work. Something amiss here. They will not cycle in unison.
Even tried reversing gear servo on TX. No go.I notice when the plane first powers up the HK mains cycle without flipping the gear switch. Ittakes the move of the switch to change the nose gear. But thenthe mains go down while the nose comes up.Ugh !
I have a DX9and am using an 8 channel RX. Is it possible to program a mix? Have extra channels available. EG. Plug the nose gear into Aux 2 and run the mains on a two way Y connector?Program gear to aux 2 ?I’m running short of ideas.
Well I tried plugging the nose gear into aux 2 and assigning to the same switch(gear) A as the mains. Used 2-way Y connector for the mains and it worked. But then the port side main stopped working. Crap. This plane has gremlins !
I heard some of those gear are finicky about the servo signal they see. They are just looking for a certain signal range which gives the command for up or down. You may still want to experiment with the one gear. Set the up and down servo endpoints higher or lower in the tx and see if it responds. Then hopefully if something works the other ones will be ok with it.
Servoless Retracts are Nice, But they can be a PITA I prefer the mechanical retracts with a separate servo, its less Hassle and Cheaper IMHO
Less hassle? Personally, I've had one plane with servo retracts and and they were nothing but trouble with a capital T! I've only had one servoless retract problem. It literally just let out its magic smoke once when I plugged the plane in. Plugged in a replacement, off she goes!
I'm afraid it did not work out quite yet. Went to the servo setup screen on the DX9. Played with the travel range on the gear channel. Plugged faulty main retract directly into channel 5 on the rx. . Won't come to life.
I think there's another screen to look at. It's as though it's not making a switch or not detecting the current.
I thought the HK servoless retracts want 125+ on "travel" for the switches. Basically the ic circuit in the retract "looks" for "0" and then for "125+" to operate. Futaba are usually set to "max" and do not seem to have a problem actuating these, but Spektrum only sets "100%" for it's travel and needs to be set to "125" for these to work.
I think I had a set that would only actuate if the travel was set to +125 on the one side and -125 on the other, and anything less wouldn't reliably actuate them on my DX8.
PITA though trying to set them up without knowing what it takes to get them to work!
It isn't the mistake that causes the crash - it's the time it takes to realize that it WAS a mistake!!
In the servo setup screen for the DX9 , the max travel value is 125% . So I tried a variety of combinations, nnet of which unlocked the secret retract code. 125/0, 0/125, 125/125 , 0/0. You name it I tried it. Connected individualy and via a Y connector.
Originally, all three worked. Then, the nose gear went to sleep.Dead. So, I bought a new one from PW-RC. Then briefly , or should I say" momentarily, all three worked again and I thought I was done. Declared victory and spiked the ball.
That's when the port side main took a hike. Two dead. I guess one out of three is pretty good for a batter.
I have a sneaky suspicion I'm missing something. Waiting for the ' aha' moment as in: Aaahh , now I get it !" . "It was the doo-hickie / thing a ma chig. "
Set up a test with an esc/motor and rx. Tha's what I;m using to test the retracts. Checked cables, connectors, etc.
6VOLTS max on the retracts. What esc are you using? Does it have a Bec? If using a separate power source for RX, what is it? You cannot run 14.8 volts to the RX either.
Normally becs built into the esc's are 5 or 6 volts with some giving the option between these two. Separate bec usually provide a choice of 5/6v. A battery pack must not exceed 6v or the retracts will burn!!
If you require a mix to gear, look at aux 3 or aux 4 with switch to operate with gear.flying-barely
hawk -- when I worked on your nose gear trying to get it to respond - I used 4.7 volts and the 6v. the same results. If I manually moved the gears to deactivate the momentary end point switch, the motor kicks in and the gear would roll until opposing switch was activated. I think there is an issue with the switching circuit