Digital Servo programmer..

Digital Servo programmer..
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Digital Servo programmer.. - 3/8/2007 12:05:14 AM

Posts: 74
Joined: 11/28/2006
From: MetepecEstado de Mexico, MEXICO
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Hello once again guys and galls, i in my exitedness of getting my first giant airplane, bought some HS 5955 servos (to match those recommended JR servos for the Yak '86) and i haven't recevied them yet, but the question is: Based on teh stats of the servos, they are more than needed for the airplane, so i have no problmes right?

and another question, it seems i need a digital servo programmer, do i? spending 150 more bucks on this will really be nasty.. alreeady spent lots and i have no airplane yet hhahahaha

Thanks agian.

RE: Digital Servo programmer.. - 3/8/2007 1:08:42 AM

Rezagh

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Yes, servos are well within the specs plane is calling for. As far as programmer, I think you need them or better to say it will help you more but that's for others to make comment on. I don't use Hitec servos so I'm not really sure!

Thank you,
Reza

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(in reply to EduardoC)

RE: Digital Servo programmer.. - 3/8/2007 2:13:50 AM

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From: mayfield, KY, USA
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i think you have made a great choise in servos. i have used JR only for several years but have had problems with them this year and am switching every thing i have to 5955's. some of the guys i fly with have switched all ready and with the programer they are able to match the servos without match boxes and elevator throws have been easy to get right all the way through the travel. also have almost no gear slop as seen in metal geared servos before. happy flying and good luck, you will love the QQ yak as i have all 5 i have had.

randy racer

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RE: Digital Servo programmer.. - 3/8/2007 2:55:33 AM

Posts: 74
Joined: 11/28/2006
From: MetepecEstado de Mexico, MEXICO
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So Randy, you really recommend that i get that servo programmer? Or it is ok if i dont... I mean, I bought a new radio (futaba 9CAP super, im a futaba lover (dont ask why)) and already investment in this nice piece of aircraft is getting a bit heavy (bought that nice duralite redundant battery you guys recommend) so i'd like to cut expenses a bit if possible, but if it is needed for a good performance of this aircraft, i will buyit, i just prefer not to. Thanks in advance! and same to you, nice flying.

(in reply to randy racer)

RE: Digital Servo programmer.. - 3/8/2007 12:59:41 PM

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From: mayfield, KY, USA
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with the programer you can set center and end points on your servo not your radio. on duel elevators it has been almost impossible for me to get both sides to work together all of the way through the throw on high rates and low. at some point in the travel they will me off a little making the elevators work a little like ailerons. here a few of us went in together and bout a programer so it didn't cost anyone very much but i would buy one myself now that i know what they can do for me. go to downonthedeck.com and read up on it they have a lot of info there and i think you will see what i am trying to say.

randy

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(in reply to EduardoC)

RE: Digital Servo programmer.. - 3/8/2007 1:31:06 PM

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From: Gastonia, NC, USA
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EduardoC

It really depends on what you are trying to do... Which plane are you purchasing? How many servos are per surface? I think you are getting the smaller Yak. If so, does it use two servos per wing? I didn't go the QQ's site and double check. If so, then yes, a programmer would help keep those two servos in sync. If not, then you'll be able to plug each servo into separate channels setting up aileron differential and set end points and center via your 9CAP.

If you have a total of 2 servos total for ailerons (1 each wing), 2 servos on elevators (1 each side), then I'd say you don't need the programmer, just like you wouldn't need a matchbox if you were a JR guy. You can do everything you'd like with your transmitter. You'd simply set up your AILEVATOR mix (channels 2 and 7 I think) for your elevators and AIL-DIFF mix (channels 1 and 8 I think) up for your ailerons. Since each servo is on its own channel, you can go into the 9CAP and set each servos ATVs, Subtrims, etc.

However, if you have 4 aileron servos (2 each wing), then it would in fact help to buy the programmer and get the servos perfectly syncd up. YOu'd set the same mixes above, but you'd have to sync the servos on each independent wing to ensure they are not binding. In this case, you'd have 2 servos going to a specific channel and you can't program them separately with your transmitter to sync them up--2 servos for the right wing into channel 1, 2 servos for the left wings on channel 8. Again, memory could be off in terms of channel numbers, so definitely check the manual. Of course, you could still use JR's matchboxes even on the wings, but the beauty of the Hitecs are the fact that you can program them independently without having to buy separate matchboxes.

Email me if you have any questions.

Gerry
gdavisjr69@gmail.com

< Message edited by gdavisjr -- 3/8/2007 1:34:34 PM >

(in reply to randy racer)

RE: Digital Servo programmer.. - 3/8/2007 1:49:01 PM

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From: Locust Grove, GA, USA
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NO --- you do not need a programmer.
Just use those servos like any other.

quote:

ORIGINAL: EduardoC

Hello once again guys and galls, i in my exitedness of getting my first giant airplane, bought some HS 5955 servos (to match those recommended JR servos for the Yak '86) and i haven't recevied them yet, but the question is: Based on teh stats of the servos, they are more than needed for the airplane, so i have no problmes right?

and another question, it seems i need a digital servo programmer, do i? spending 150 more bucks on this will really be nasty.. alreeady spent lots and i have no airplane yet hhahahaha

Thanks agian.

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(in reply to EduardoC)

RE: Digital Servo programmer.. - 3/8/2007 3:41:40 PM

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From: Wychling, Kent, UNITED KINGDOM
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Edwardo

You do not need the programmer for the 85" Yak, but the programmer does allow you to set up a fail safe position within the digital servo's, so that you can fly PPM to ensue you have no interference problems before changing to PCM for piece of mind, alternativly go 2.4Ghz.

Mike

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RE: Digital Servo programmer.. - 3/8/2007 7:41:51 PM

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Joined: 6/5/2005
From: birmingham, UNITED KINGDOM
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Hi Guys,

Just a little something to add about the programmer. It does a great job, but when you centre the servo with the programmer and then connect the servo to a futaba receiver with zero sub trim and trim rate at center the centre moves on the servo because FUTABA transmit at 1504ms not exact 1500 for centre. Also if you set the end point with the programmer and then plug the servo into the receiver with 100% ATV set in the radio you wont get the same end point, you get less travel. It all works fine if you use a Hi-tech transmitter but many of use dont for one reason or another. So from my point of view I would use your radio to mix channels and not complicate things by using a programmer and at the same time save money.

(in reply to BaldEagel)

RE: Digital Servo programmer.. - 3/8/2007 7:46:54 PM

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Joined: 11/28/2006
From: MetepecEstado de Mexico, MEXICO
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cool, thanks a lot, everybody. Those answers prooved to be very useful, especially the channel mixing one. Thanks all, you just saved me 150 bucks :P.

(in reply to the3dpilot)

RE: Digital Servo programmer.. - 3/8/2007 8:15:38 PM

Aussie_Knife_Edge

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From: Sydney, AUSTRALIA
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Eduardo,

Remember that you'll need to reverse one of the elevator servos... This is where the programmer comes into it's own. On my 73" Yak I had uneven throws on the elevator halves. By using the programmer I have been able to correct this problem via end point adjustment.

IMHO the programmer is a worthwhile investment although they can be hard to get. I waited ~4 months for my LHS to get one and in the end I bought one on eBay. Got sick of waiting. It cost me $118 delivered which was less than the LHS anyway.

Cheers
Jason.

(in reply to EduardoC)

RE: Digital Servo programmer.. - 3/9/2007 12:59:23 AM

Posts: 74
Joined: 11/28/2006
From: MetepecEstado de Mexico, MEXICO
Status: offline

well, tower hobbies sells the hitec recommended servo programmer for these servos, reversing in the transmitter the servo won't do? I may buy it then... who knows now lol. I shall ask the all powerful wallet master, the father.

(in reply to Aussie_Knife_Edge)

RE: Digital Servo programmer.. - 3/9/2007 1:47:13 AM

Aussie_Knife_Edge

Posts: 270
Joined: 8/21/2005
From: Sydney, AUSTRALIA
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The spilt elevators are normally run with both servos on a Y lead. Some radios have mixers whereby two RX channels are used for each elevator servo. Similar to running two aileron servos on two channels. I have heard of people having issues with trim adjustment using this method on the elevator but can't confirm this. Another solution is to buy an inline servo reverser but this has it's own issues i.e. delay etc. The programmer is the best solution IMHO. If you don't want to buy one see if you can borrow one from a friend?

Manual reversal of a digital servo can be done but it requires the motor and pot wires to be reversed. Not a job for the faint hearted!

Cheers
Jason.

(in reply to EduardoC)

RE: Digital Servo programmer.. - 3/9/2007 1:25:22 PM

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From: Hobe Sound, FL, USA
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SERVO INFO : OK expert's, I am on the list for the new 86" Yak. Elevator and Aileron setup. OK to use the
" Y " harness on both? I am not a hover type, etc., but expect to do pattern maneuvers, start on beginner IMAC, etc. I will follow instructions for equipment, etc., in the QQ manual.

Thanks,
Vince

(in reply to Aussie_Knife_Edge)

RE: Digital Servo programmer.. - 3/9/2007 1:35:06 PM

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From: Johns Creek, GA, USA
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DO NOT USE A REVERSER...

they are Evil!!!

to the original poster...

with the 9C, just use the Ailevator function and use Ch 2 and 8 for the elevator servos......( i think it is 2 and 8... double check that....)

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RE: Digital Servo programmer.. - 3/9/2007 2:12:02 PM

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From: Hobe Sound, FL, USA
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Aussi Knife Edge was talking about "reverser" on his last post. I am only inquiring about the "Y" harness on elevator and aileron. The radio I am using on this Yak is capable of 2-7 or 1-8, whatever combination needed for separate channels on these functions. Just trying to keep it simple. Is the "Y" harness the "reverser" you are advising on?

Where are you guy's purchasing the regulator, proper batteries, etc. ?

Thanks again.

< Message edited by crankpin -- 3/9/2007 2:14:14 PM >

(in reply to exeter_acres)