Hello,
I've been lurking a little bit her and using the setup guides for setting up a dfc head and 3gx. I appreciate the hard work that went into making these help threads and videos.
I've finished putting together my 450 pro dfc and have ran into some issues setting it up.
My equipment:
New 450 pro dfc kit with ds415m servos
3gx that came with it
Spektrum DX7s
I've went through and tried to setup the head 2 different ways:
I've used the guide on this forum: 90 servo's before installing and level the swash by adjusting the links.
I've used the freddy can fly videos: get horns as close as possible, make all linkages same length, level swash with sub trim.
I'm having no issues getting the swash level, but my problem comes when I move the collective stick up/down in DIR mode. At the positive end of travel, the pitch servo is a little bit higher than the aileron. At the negative end of travel, the pitch servo is a little bit lower than the aileron.
I can set a leveling tool on top of the swash and see it rock back and forth as collective pitch changes.
I've asked for help on another forum, but I've heard advice that you don't level the swash at high and low stick, just mid...but I think there's something wrong. One of the freddy can fly videos showed that the swash should be level all the way through collective travel.
so I think I got the servo's pretty close to 90 before installing them and it looks like the pitch moves more than the aileron when looking from the front of the heli. With the soko helitool pitch gauge and the swash leveled within 0.2 degrees at mid stick, it's like 2 degrees off at high and low stick. This is at 10 degrees of pitch, it gets further off with more.
I took a little video with my phone to show the guys on the other forum:
[video=youtube_share;ODPULdbcqEM]http://youtu.be/ODPULdbcqEM[/video]
So I got to thinking about it today, and wondered if the 3GX might have been to blame...I keep reading that they are evil. I hooked up the cyclic servos to a normal receiver (no gyro) and had the same exact issue. so the 3gx has nothing to do with it.
now with the servo linkage legngth I can't get them exactly the same, because you are limited to + or - one turn. The balls are in the inside holes on the servo horns.
Any ideas?
I've been lurking a little bit her and using the setup guides for setting up a dfc head and 3gx. I appreciate the hard work that went into making these help threads and videos.
I've finished putting together my 450 pro dfc and have ran into some issues setting it up.
My equipment:
New 450 pro dfc kit with ds415m servos
3gx that came with it
Spektrum DX7s
I've went through and tried to setup the head 2 different ways:
I've used the guide on this forum: 90 servo's before installing and level the swash by adjusting the links.
I've used the freddy can fly videos: get horns as close as possible, make all linkages same length, level swash with sub trim.
I'm having no issues getting the swash level, but my problem comes when I move the collective stick up/down in DIR mode. At the positive end of travel, the pitch servo is a little bit higher than the aileron. At the negative end of travel, the pitch servo is a little bit lower than the aileron.
I can set a leveling tool on top of the swash and see it rock back and forth as collective pitch changes.
I've asked for help on another forum, but I've heard advice that you don't level the swash at high and low stick, just mid...but I think there's something wrong. One of the freddy can fly videos showed that the swash should be level all the way through collective travel.
so I think I got the servo's pretty close to 90 before installing them and it looks like the pitch moves more than the aileron when looking from the front of the heli. With the soko helitool pitch gauge and the swash leveled within 0.2 degrees at mid stick, it's like 2 degrees off at high and low stick. This is at 10 degrees of pitch, it gets further off with more.
I took a little video with my phone to show the guys on the other forum:
[video=youtube_share;ODPULdbcqEM]http://youtu.be/ODPULdbcqEM[/video]
So I got to thinking about it today, and wondered if the 3GX might have been to blame...I keep reading that they are evil. I hooked up the cyclic servos to a normal receiver (no gyro) and had the same exact issue. so the 3gx has nothing to do with it.
now with the servo linkage legngth I can't get them exactly the same, because you are limited to + or - one turn. The balls are in the inside holes on the servo horns.
Any ideas?