|Nov 30, 2014, 08:25 PM|
Joined Jan 2014
Replaced shaft after last wreck, and took care of the rudder servo rod binding issues while setting up the gyro. The rudder has full movement both directions.
This is my first collective pitch helicopter; though I started on airplanes years ago, and wanted something a bit challenging to fly. The CX 250 has been a great learning tool, though I should have probably started with a 450.
This helicopter started life as one of Ehirobo's RTF kits, and over the past year has been greatly modified. The only original components are receiver, transmitter (CX-CT6C), frame, and a second CopterX 20A ESC. I'm running with a Tarot rotor head and main gear, Hyperion 2206-3900kv motor, Align tail boom, Align bottom plate and skids.
I'm kind of wondering if the last wreck knocked the gyro senseless...The gyro is very sensitive to vibration. It's possible I knocked loose internally. If that's the case I might just invest in a slightly more robust fbl controller.
What would be the next best fairly cheap fbl controller that can be fitted without modification?
I'm going to let it rest for a few days, I'll start playing around again next Saturday.
|Dec 01, 2014, 05:24 AM|
If I am understanding correctly. Once you get it airborne, it begins a right (Clockwise) piro . Is it instantly or after a few seconds?
If it's after a few seconds, it may be that there is a parameter that is off in the programming. Either that or something is amiss in the condition switching. This FBL unit has been known to change conditions on its own in flight if the condition banks aren't the same.
For posterity's sake, can you Copy paste the .ini file from your save?
As far as recommendations for a different controller:
Lower price but still useable:
Tarot ZYX series
I would recommend Robird G31, but Robird is no longer in business. You might be able to locate a used or NIP Robird in the classified section for around $50-$60)
The Turnigy 3D-H was a decent one but they are not coming back in stock... AVOID the Cyclone...
A bit higher price:
For $149 ($119 if they are still on sale) you can pick up the Spartan Vortex Vx1e. (Sold out most places now it seems)
There's also Microbeast. You can pick up new for around $179 and used ones for around $100 give or take.
Ikon/MSH brain - These were on sale for Black Friday sales for around $179. Might still be able to catch one for Cyber Monday. Normally they would be under the Top Shelf category at $224 but are on sale right now. Sometimes you can pick them up used for around $150
Top shelf (Expensive)
DJI Naza-H (GPS unit sold separately)
Spartan Vx1N or VX1
Currently, I am running Robird G31. It really is a great little FBL unit with governor mode capability if you are using SBus or Spektrum satellite Rx. The bad part is getting one now that Robird has gone under. There is some support in the form of the Hobbyist community, but official support is gone for the most part.
I'll personally be switching to Spartan Vx1e as I have read some really good things about them.
|Dec 01, 2014, 03:52 PM|
Joined Oct 2004
things like this suck. If I were you if you have ANY doubts I would NOT fly with a suspect unit, just not worth the risk and potentially dangerous.
My STRONG recommendation at the moment would be without a doubt a mini KBAR. Several threads with hundreds of users and very, very few (if any) problems. Around $ 40 shipped off Amazon.
I only follow this thread because I flew the older 3X1000 for nearly 2 years and was totally happy with it, however, the mini KBAR is a drastic improvement over that Unit.
|Dec 01, 2014, 11:35 PM|
Joined Jan 2014
(counterclockwise), Left piro.
Yep been thinking about a Mini K-bar or BeastX clone....I don't think the K-bar will mount properly in the 250 without some frame mods.
I was thinking about the Robird G31 but oh-well.
|Dec 02, 2014, 08:45 AM|
Software and firmware can be obtained, in fact Robird put the software package back up on the server.
|Dec 02, 2014, 08:50 AM|
I stopped using the CX-3X2000 after the second one I purchased was worse than the original first run one I bought. No matter what I did, I could not get it tuned properly. That cost me two airframes. I'm the first person to admit a dumb thumb. But when the gyro wigs out, and throws the heli to the ground in a ball faster than the throttle hold can be activated; then does the same thing on the second flight after tuning the rekit, there is a problem.
KY-Model doesn't respond to emails to the support line, and Resellers are just more concerned with selling them for around $60 now. No support, no updates, regressing firmware "update" that took away functionality, then no other support whatsoever. Very typical of CopterX.
Between this Gyro, and the low quality of their kits, I will never purchase another CopterX product. Lesson learned... and to think I was at one point considering becoming a U.S. distributor for them.
|Dec 02, 2014, 06:59 PM|
Joined Jan 2014
Here's the .ini file.
|Dec 02, 2014, 11:11 PM|
|Dec 03, 2014, 02:35 AM|
|Dec 03, 2014, 11:23 PM|
Joined Jan 2014
Where should I set the RC Deadband; 80 seems really high, but I've actually never touched the advanced setting and the CX-CT6C transmitter doesn't have expo settings though it does have dual rates.
|Dec 04, 2014, 04:09 AM|
In the CT6C, I believe the Expo is handled in the DR settings somehow, at least that's how it looks to me in the manual.
In all honesty, I would not own a Tx that does not have an expo feature.
|Dec 06, 2014, 10:44 PM|
Joined Dec 2014
found out the sat. receiver doesn't work on dsm2-1 - dsm2-4 and only kind of works on
dsmx-1 / dsmrx-2 but works prefect on dsmj. I didn't see that anyone had this working yet so I thought I'd post it up for everyone.
|Dec 08, 2014, 01:11 AM|
The yellow units are interesting because they replaced the gyro chips that the real Vbar uses with a single 3 axis chip. The Vbar gyro chips have an analog signal output that goes to ADC's on the Vbar's microcontroller. What they did was use a 3 axis chip with a digital signal output and use a microcontroller to generate the 3 analog signals that the vbar MPU expects.
The blue units are a copy of the real Vbar hardware but use a lower specced single axis chip that can "only" sense 500 degrees rotation per second instead of 2000 degrees rotation (the 2 axis chip is the same one as on the vbar). Apparently it doesn't make a difference because people say it flies just the same (interestingly people also say the yellow units have a slightly different feel than the real Vbar, probably due to the different gyro chip used)
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