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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › 14MZ oddities....
02-10-2006 01:35 AM  12 years agoPost 1
AnnihilaT

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The Netherlands

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So im finally getting around to programming my MZ for my models (after 6 months of staring at it in the box and stroking it now and then) and im noticing some odd behavior. Namely, i have one model that i fly with a 9C TX and the tail is solid and does not drift at all. Today i flew it first with the 9C to get a feel for how it flies on that and then switched to the 14MZ and took it back up in the air. Went back and forth several times and with the same results each time. With the 14MZ the tail drifts slow and stead to the right. More so in rate mode than in HH but still a very noticeable drift even in HH mode. With the 9C everything is rock solid and no drift. Even tried overspeeding the RPM a bit on the 9C to see if the throttle settings were a bit higher on the 14MZ and causing vibration induced drifting issues. Took throttle all the way up and still rock solid on the 9C (im using governor mode on a jazz esc). Soooo.... Im puzzled. I looked thru the settings on the 14mz to see if there were any revo mixing enabled and although i couldnt find anything specifically called revo mix i assumed that pitch to rudder mixing is what is the equivalent on the MZ and it is INH. Soooo.... Whats up ? Any ideas?

I have of course checked all trim and subtrim settings for the rudder. Not the issue.





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02-10-2006 01:56 AM  12 years agoPost 2
ScareCrow_Delta

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Sebastian, FL

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You simply cannot copy the values on the 9C to the 14mz because some values will be different. You need to check all your servo calibrations. You need to reset your governor, servos and etc. with the 14mz.

I think the problem with your gyro is the signal for center which has to come from the radio when you set the gyro. Somebody correct me on this one. Like the SL720, when you set the gyro, it takes the center sample(electronically) and reference everything to that.

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02-10-2006 03:02 AM  12 years agoPost 3
AnnihilaT

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The Netherlands

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Yes im aware of that. You couldnt copy the values if you wanted to anyway since the MZ has a -100 to +100 numbering scheme and the 9C is 0 to 100. I set the model up from scratch on the MZ.

But you may have hit on something with the center signal. That very well could differ from radio to radio so i will try running through the gyro set-up routine again (this is a CSM gyro).





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02-10-2006 03:05 AM  12 years agoPost 4
AnnihilaT

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The Netherlands

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Oh one other odd thing (or not?)....

Having the radio on for 30-45 mins while i was programming it for the heli im setting up i noticed that when it is transmitting for this long the RF module on the back is getting QUITE warm. Not really hot but very warm. I found this a bit odd as well since my 9C does not do this. Is this normal?





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02-10-2006 03:59 AM  12 years agoPost 5
RCfan

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Longwood, FL USA

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I assume you've checked common sense items like the servo monitor menu to ensure that there is no channel output on rudder? It's possible, although unlikely, that you may have a miscalibration at zero stick. Best place to see this is to go into the AFR screen, select the rudder function and check the values on top of the graph. If it is, then you'll need to send it in to tech support to have calibrated. A workaround for this (until you get around to sending it in if necessary) is to create a line curve under AFR for rudder. Add a 0 rate around mid-stick (1-2%) as needed.

Haven't worked with CSM gyros, but if they work like all else, then most settings are set at power up, i.e. centering, so that particular setting shouldn't change if you switch from one radio to the next (but as ScareScrow said, you really neeed to make sure things are setup correctly and not assume that settings will be identical). The other thing is that 14MZ gimbals are much more sensitive (and precise) than 9C so even the slightest movement will be sent to the Rx.

Regarding the module getting warn, that's normal on any radio. Just make sure you have the antenna hooked-up when Tx is on for long periods, even on the bench.

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02-10-2006 04:41 PM  12 years agoPost 6
ScareCrow_Delta

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Sebastian, FL

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You are also better off using the DSC cable when setting up so you are not transmitting and getting your module warm, but like mentioned, warm modules during transmit is normal.

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