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270CFX Blade 270CFX Helicopters Information and Help


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Old 03-29-2018, 12:10 PM   #1 (permalink)
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I am no longer sure what is wrong with my 270cfx. This started 2 weeks ago, The pitch range keeps on changing, I had to check and adjust before I start flying. Then suddenly for no reason it will not hold the pitch that I set in menu K. Then, I can no longer set the positive or negative oitch. I went back to menu menu J to make sure that the cyclic pitch geometry was at 6 degrees. Then, centering , then servo mixer was not right.
I sent the AR7219BX to horizon for servicing. They said that the BX was OK, Most likely it is the mechanical setup of the heli. When it came back I made sure that the 270cfx was set mechanically correct before setting up by the 7210bx. This time the servo mixer doesn’t correctly set.
Note: AR7210bx is unlock

3/31/18 - I did a complete re-setup of the setting. The pitch range setting will not hold. The swashplate servo directions are mess up. I purchased a new AR7210bx, I will give an update how it goes.

4/1/18 - even with the new AR7210bx, the pitch range setting will not hold. My next plan is to replace
all 3 cyclic servos with new one..

Last edited by tomasito; 04-01-2018 at 12:48 PM..
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Old 04-03-2018, 09:17 AM   #2 (permalink)
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Hey Tomasito,

That's an odd problem you've got there. Almost sounds like you are missing a couple of teeth on one or more servos...

One thing I would suggest is using a servo tester to eliminate the BX and make sure your servos are working correctly.

I have a unit that will drive 3 servos at once. With it I can run all the cyclic servos thru their paces and verify the mechanical aspects are correct.

Almost anytime I have a control issue I use the servo tester first.

Good luck
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Old 04-03-2018, 07:07 PM   #3 (permalink)
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that's a good advice. I don't have one, but I will purchase on
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Old 04-07-2018, 10:57 PM   #4 (permalink)
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Quote:
Originally Posted by C_M_H View Post
Hey Tomasito,

That's an odd problem you've got there. Almost sounds like you are missing a couple of teeth on one or more servos...

One thing I would suggest is using a servo tester to eliminate the BX and make sure your servos are working correctly.

I have a unit that will drive 3 servos at once. With it I can run all the cyclic servos thru their paces and verify the mechanical aspects are correct.

Almost anytime I have a control issue I use the servo tester first.

Good luck

Hey CMH, what servo tester do you have ? I was thinking this would be handy to have and been looking for one like yours ..
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Old 04-10-2018, 01:05 AM   #5 (permalink)
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Hey Ken,

This is the tester I'm currently using;

https://www.banggood.com/HJ-Digital-...r_warehouse=CN

It works well, drives 3 servos, has 3 modes ( normal, centered, and sweep ), and displays the pulse width. I like having the digital display.

I have not yet had a need to use the "Pulse Width" feature.

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Old 04-16-2018, 02:35 PM   #6 (permalink)
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I bought my 270_CFX used, so who knows how many flights on it before I got it. Didn't look like many though.

Anyway, at my flight #207 I started having weird glitches, real short tweaks that then disappeared.

I checked, and my elevator servo was feeling a little odd. I put it on the servo checker and sure enough it's failing. But in an odd way, not consistent. Sometimes it just pops 10 or so off in one direction.

I pulled it off & opened it up. Not an easy task to get to the pot to clean it, so I ordered a new one.

Since this failed in a way unlike any other servo I've had, I'm leaning towards servos being your issue as well.
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