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11-27-2006 03:12 AM  11 years agoPost 41
Razmo

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Chicago

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Well, now have a new problem. I think I want to buy the DX7

You are right, I would try a friends Tx but I live so far from the field these days, I never get there. An even better reason to buy the DX7 . The servoSync feature really sounds like a winner as well.

Sorry guys if we've gone off topic here....

Raz

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11-27-2006 04:16 AM  11 years agoPost 42
Micro-Maniac

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Pasco,Washington Formerly: Captain Chaos

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Yep - Servo Sync should definitely lay all those latency issues to rest for sure - Very cool feature - I'm really looking forward to getting my hands on it.

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11-27-2006 11:58 PM  11 years agoPost 43
Razmo

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Chicago

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I spoke to a Specktum support person today who claimed ServoSync works with either analog or digital servos.

I also came across learning that Hitec offers a programmable box that allows you to equalize center of all digital servos amongst other settings. Man this sounds like a nice little tool for eCCPM setup. I haven't confirmed whether this box will work with other servos such like the s3154?

I also spoke to a Futaba tech, who suggested opening the case and resetting the gears to equalize center. Not a bad idea. He didn't want to really get deep into due to, well you know

Raz

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11-28-2006 03:36 AM  11 years agoPost 44
husafreak

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Livermore, NorCal

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I have that Hitec servo programmer, I used it to program the six HS5955TG servos in my 102" Somenzini Yak 54. And that is also why I chose HS6975 servos for my T-Rex 600. Nice tight karbonite gears and I can program the 3 servos to have dead center and identical travel with everything in the TX zero'd out. And the servos should have identical travel throughout thier range. I suppose you could also adjust the endpoints so that the swash is dead level at center and extremes of collective travel and hope roll and pitch cyclic doesn't introduce any wierdness. You can see the Hitec Programmer in use on http://www.downonthedeck.com unfortunately the thing is a bit-- to use, it's all trial and error... But now I'm bummed I have a 9C slomo TX! Eric

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11-30-2006 01:00 AM  11 years agoPost 45
Micro-Maniac

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Pasco,Washington Formerly: Captain Chaos

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I ended up ordering this servo tray and may try MJWS's suggestion of short servo arms with high EPAs/SMs as that sounds interesting to me - I might can even swing some S3110s this month to stick on it too -

Mounted View

I think with all the upgrades and refinements my H2 is going through this winter it's going fly a lot sweeter next year like it did last year after I Duzi'd it.

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11-30-2006 01:58 AM  11 years agoPost 46
Razmo

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Chicago

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Pretty awesome! I may just have to give them a try as well. Where did you find them?

p.s. Just picked up my DX7 about an hour ago

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11-30-2006 02:08 AM  11 years agoPost 47
Micro-Maniac

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Pasco,Washington Formerly: Captain Chaos

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I actually ordered that tray from HeliHobby - - They've come through for me on a few orders now - http://www.helihobby.com/html/horne...l?selectItem=46

-

Man it's going to be another month or 2 before I can afford the DX7 myself - I done spent what little I had left over from other commitments this month on the new 2100T gyro and misc parts.

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11-30-2006 02:19 AM  11 years agoPost 48
husafreak

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Livermore, NorCal

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Well Capt, for 12.95 that beats spending all afternoon whittling plywood! I really like Helihobby, been doing business with them for a couple of years. Cool site and they ship fast, lot's of neat parts, allways treated me well. Eric

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11-30-2006 02:33 AM  11 years agoPost 49
Micro-Maniac

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Pasco,Washington Formerly: Captain Chaos

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Yeah I figured I'd be too lazy to make my own tray anyways - - I figure I can place the servos on it skewed a little to try other alignments as well - I'll have to move the servos in/out anyways to use my Duzi links - Not giving those up - I just hope it's plenty stiff as that was my original complaint about the stock tray and been using Duzi mounts ever since - (I think I remember flexing the tray just by twisting the blade grips when checking for slop and decided that had to go).

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11-30-2006 03:57 AM  11 years agoPost 50
Razmo

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Chicago

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I'm a little dissapointed with the quality of the DX7. The gimbals are rather cheap as well as the construction of the radio. It's a little chinzy feeling. I prefer the feel of my 9CHP while holding it in my hands. I was able to adjust the spring tension on the gimbals but the throttle is slightly notchy when the metal band is tightened. I was able to apply some electrical tape along with a little grease over the notchy gimbal which has smoothed things out but I think I'll need to apply another layer in order to get a tighter feel.

I have noticed that the stock X3D servo plate is much stronger than the stock H2 plate. Being carbon fiber with a cutout like that may introduce flex? Maybe even more so than the stock X3D plate.

Raz

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11-30-2006 04:11 AM  11 years agoPost 51
Micro-Maniac

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Pasco,Washington Formerly: Captain Chaos

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Yeah I wish all radios would adopt the ATX style of smoothing band where the metal band runs all the way accross so no one notch can find a flat spot of metal band to rest on and screws hold both ends of the metal band for great tension adjustment - When I get my DX7 I'll probably see if I can incorperate such a band on it - Never got that ambitious with the DX6 -

I know this range of JR/Spektrum radios aren't their greatest quality stuff - But I hope what it lacks in cheap packaging it makes up for in performance and reliability (I went from a Stylus to the DX6 and still prefer the no hassle 2.4ghz DSM to 72mhz - Just takes time to adjust to it - After a few months I sold the Stylus because I just quit using it and knew there'd be better DSM systems to come).

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12-07-2006 09:08 PM  11 years agoPost 52
husafreak

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Livermore, NorCal

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Aw, you guys are going to kill me...I just realized I had the "offset" function on my Futaba 9C enabled on my Hornet. I was flipping through my modes with the motor unplugged and the swash kept jumping around. It took me a long time to figureout what was causing that! This was the worst cause which led to my original post. I will start another thread about the pro's and con's of "offset" after I do a search but I do know that if you don't know what it is or how to use it _ you don't want it! Eric

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12-22-2006 09:02 PM  11 years agoPost 53
husafreak

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Livermore, NorCal

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Here are some pics of my modified CCPM setup. The balsa blocks are 5mm thick , the balls and links are from my Trex 450 parts bin. you have to drill out the links for the threaded rod. The servo arms are from Dubro.

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12-22-2006 09:11 PM  11 years agoPost 54
Razmo

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Chicago

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Looks pretty smart. Nice job!

Raz

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12-22-2006 09:12 PM  11 years agoPost 55
Micro-Maniac

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Pasco,Washington Formerly: Captain Chaos

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What's the blue stuff you have 'em adhered with? Or is that masking tape and glue? If so do you trust the masking tape to hold? Looks like plenty of room for lots of servo arm deflection / resolution.

-

I'll post pics of my layout when I get it all hashed out and finished - Probably next month after I get my DX7 -

Luckily(?) the servo plate I bought isn't what was pictured on the website that I linked to above as it would have been too big to fit in the canopy - But if I'd known that I could have gotten it elsewhere for half the price -

I might try to acquire all short Duzi links as I think the long ones will be too long for elevated servos -

Looks like I'll have it all turned around with the elevator servo in rear instead of front because of the gyro tray which I'd like to leave where it is -

Tail - Going in an unpopular direction here and can already hear the hellfire sermons I'm going to get for straying away from an orthogonal servo arm to linkage relation - But I'm trying to work out unequal left/right pitch slider travel with equal left/right servo arm deflection from an offset neutral postion by using the servo arm's rotational deflection away from the direction of the linkage travel - This should give lots of equal left/right servo resolution and piro rates to work with which might improve tail performance - Goal is 45° Right, Offset° Neutral, 45° Left minus Offset° (like 45° 8° 37°   -   8° being the servo neutral position with equal amounts of servo rotation to both 45° right and 37° left).

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12-23-2006 01:40 AM  11 years agoPost 56
husafreak

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Livermore, NorCal

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Thanks, I expect the tape to hold up. I used to mount servos this way in glider wings and those were high speed slope racers made of fiberglass. I like that the servos have no give at all like with double sticky foam tape. You put tape on the chassis and servo and then glue the tape to the balsa. It's light and I could line up the links. The best part is of course it allows the servo arms to be horizontal and to move unobstructed by the mounting plate especially the elevator servo. I could mechanically center the swash in its vertical range with the blades at zero pitch and the pitch curve at zero and the servo arms level which I wasnt able to do before with the larger Futaba servos. My pitch curve used to go from like -30 to +70 and now it's 100 to 100. By using slightly longer arms I will have lost some resolution but picked up some speed, and the black Dubro horns are much stiffer than stock. The whole assembly just feels more rigid. I'll let you know how it flies compared to stock.

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12-23-2006 01:46 AM  11 years agoPost 57
Micro-Maniac

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Pasco,Washington Formerly: Captain Chaos

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Larger Futaba servos? I didn't think any other Futaba servos would fit the Hornet - The S3110s are likely faster and/or stronger than anything you were using before anyways -

I'm shooting for the inner hole on the beefy HS-55 servo arms on S3114 servos hoping that'll provide enough swash articulation for lots of resolution.

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12-23-2006 03:30 AM  11 years agoPost 58
husafreak

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Livermore, NorCal

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Man, I'm psyched to see what you come up with. My fix here is about the limit of what I have learned about helicopter setup. I'll know soon whether I've accomplished any thing worthwhile. My original x3D build had tiny dymond 4.7 gram servos that had terrible neutral drift. I spent the first minute of every flight trimming! So the Futaba's were a big improvement but then my mechanical setup was bad-I'm finally doing something I should have done over a year ago... It's just that my flying has finally improved enough that I needed to do something, I was fighting for control all the time.

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12-23-2006 03:48 AM  11 years agoPost 59
lgibjones

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Chicago, IL

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If possible, I would like to see a pic of your DX7 reciever(s) on the Hornet, as I am about to do this intallation over the Holiday weekend, and am looking for ideas.

Thanks,

Gib

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12-23-2006 04:14 AM  11 years agoPost 60
Micro-Maniac

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Pasco,Washington Formerly: Captain Chaos

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Well my layout shouldn't perform any different from yours - I abandonned my 1:1 deflection ratio idea in favor of resolution - The big difference for me will be losing the Duzi mounts and using a better radio -

Jury is still out on my tail idea though - I'm really interested in seeing how that performs if I can get the full left/right delfections to work right after I find the exact amount of offset.

-

lgibjones - You should be able to buy the AR6100 receivers about anywhere now - They're 3.5g 6ch and will fit anything anywhere you wanna put em.

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