[SOLVED] Setup Wizard & Servos

[Jon_PDX]

http://wiki.beastx.com/index.php/The_BEASTX_servo_list/en

Here is a link for servo specs

Hi,

I've been trying to help Jim with getting setup through email and I have a question for you regarding the info in the link you provided.

In the wizard it mentions that it's important to use the correct pulse and frequency but does not say what will happen if it's set wrong. In the link you provided it mentions that setting it to high can over heat them. Is that all that can happen or are there other signs to look for?

The reason I ask is when Jim applied power the first time I think a couple servos went to full deflection and I was unable to provide an answer as to why that happened. The only thing I could think of was the pulse or freq. may have been wrong.

Also, if you don't mind I have another question regarding servo settings.

I set up my Pro but used the highest freq. my servos could handle which was 333Hz. I noticed in the link provided it says to use 200Hz for my swash servos and only 165Hz for my tail servo. Does that also apply to the Spirit Pro or are those setting only for the BeastX?

If they do apply to the Spirit Pro, why use 200Hz instead of 333Hz on the swash servo and only 165Hz on the tail servo when both servos are rated for between 250Hz and 333Hz?

I was going to ask this stuff in a separate thread but since Jim and I are both learning about this stuff I figured I would ask it here.

Thanks,

Jon...

[ZeXx86]

Hi,

thank you for your support!

In the wizard it mentions that it's important to use the correct pulse and frequency but does not say what will happen if it's set wrong. In the link you provided it mentions that setting it to high can over heat them. Is that all that can happen or are there other signs to look for?

When servo is running with higher frequency than designed by manufacturer, it can:

• Overheat
• Jitter randomly or put whatever deflection
• Not cause anything - servo will be not moving

The first two could damage the servos permanently, but it will rather take some time. Unfortunately it is individual for each servo. Usually when servos are really digital, they can handle also higher frequencies with no damage.
But always if you will set lower frequency, it can't damage the servos.

Regarding next question about frequency - manufacturers are rating their servos with frequency, but in some cases even if there is stated it can work on this frequency, it might get too hot with some kind of load.
For example if you will use Cyclic servo on the tail, then it can work, but usually not at the same frequency, because rudder servos must handle very fast movements that are there continously - it is doing something without a stopping and with a big jumps all the time.
While on the cyclic the servos are less active and movement is more smooth.
But for a short time it will of course work.

On the cyclic you can't set a bad Pulse - it is 1520us. So the reason for abnormal deflection could be only the frequency and that the servo is not "too digital".
But you will rather smell something if it is really damaged. Maybe the servos were connected just by one port off. E.g. instead of CH1 it was in AUX - but this will not damage servo too.

[Jon_PDX]

Hi,

thank you for your support!

In the wizard it mentions that it's important to use the correct pulse and frequency but does not say what will happen if it's set wrong. In the link you provided it mentions that setting it to high can over heat them. Is that all that can happen or are there other signs to look for?

When servo is running with higher frequency than designed by manufacturer, it can:

• Overheat
• Jitter randomly or put whatever deflection
• Not cause anything - servo will be not moving

The first two could damage the servos permanently, but it will rather take some time. Unfortunately it is individual for each servo. Usually when servos are really digital, they can handle also higher frequencies with no damage.
But always if you will set lower frequency, it can't damage the servos.

Regarding next question about frequency - manufacturers are rating their servos with frequency, but in some cases even if there is stated it can work on this frequency, it might get too hot with some kind of load.
For example if you will use Cyclic servo on the tail, then it can work, but usually not at the same frequency, because rudder servos must handle very fast movements that are there continously - it is doing something without a stopping and with a big jumps all the time.
While on the cyclic the servos are less active and movement is more smooth.
But for a short time it will of course work.

On the cyclic you can't set a bad Pulse - it is 1520us. So the reason for abnormal deflection could be only the frequency and that the servo is not "too digital".
But you will rather smell something if it is really damaged. Maybe the servos were connected just by one port off. E.g. instead of CH1 it was in AUX - but this will not damage servo too.

Thank you very much for the information!

I now have a better understanding of how all this stuff works.

Jon...

[Jimbo]

OK, with all the help from you guys, I have all the servos working. FIY the Solar D220 servo is 1520/200HZ.

Oddly the cyclic servos return to center with center the stick, but the tail rotor servo doesn't?

I do not have any throttle now. The first time I tried this, the diagnostic screen showed the "pitch" slider moving and not the throttle, but I had power to the motor. Now the throttle slider moves, and not the pitch and I have no power.

Any thoughts????

Jim

[ZeXx86]

If you are using a Spektrum satellite and you have not changed anything in the General/Channel mapping, then the problem could be just in the transmitter settings.

Maybe you have configured flat Pitch curve instead of flat Throttle curve.

[Jimbo]

If you are using a Spektrum satellite and you have not changed anything in the General/Channel mapping, then the problem could be just in the transmitter settings.

Maybe you have configured flat Pitch curve instead of flat Throttle curve.

I feel rather stupid. I had the ESC plugged into AUX2. Now all is working fine.

Only thing now, is the tail rotor servo is not returning to center with the stick, like the cyclic servos are.

Thanks for being patient with me. I know I am slow on the uptake.

Jim

[ZeXx86]

You are welcome! Great it is working now.

Yes, Rudder should not return to the center when the Head-Lock mode is On, so it is good to pay attention while spoolup that it is approximately in the center.
Head-Lock mode is normal flying mode that is used by the most pilots where the gyro is trying to hold its position.

[Jimbo]

Not sure what has happened, but now when I move the elevator stick, the pitch servo moves also. I have "no" mixes set in my DX9.

Jim

[ZeXx86]

Can you confirm that the same movement is visible in the Diagnostic tab of the software?

[Jimbo]

Can you confirm that the same movement is visible in the Diagnostic tab of the software?

Yes it is.

Jim