[NSRCA-discussion] curious

[Richard Strickland]

So going back to my first sentence/example with 6 aileron servos, I would want three each in one of the three groups of four--in this case--2-4 and 5-7.  Any potential latency 'lag' would have to be compensated with servo speed, end point and sub-trim?  But probably in reality, not really noticeable.  In my mind, I am/was confusing 'grouping' and 'mixing' on how grouping works in the radio. Thanks for the clarification.

 

Richard
 


Date: Tue, 23 Mar 2010 08:03:32 -0700
From: wemodels at cox.net
To: nsrca-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] curious

Honestly, you've lost me. On the PPM/PCM 14MZ if you plugged 6 servos in and they were all assigned to aileron the servos plugged into channels 1, 2, 3 would act together, and the servos plugged into channels 4,5,6 would act together. Acting together here means with little or not noticeable latency.

The pre 2.4 14MZ grouped channels into 4 groups of three channels. The 2.4 14MZ makes three groups of 4 channels. It is built into the radio. Plugging a servo into channel one and telling the radio that is aileron and then plugging another servo in to channel 12 and telling the radio that this is also aileron will result in a potential lag for the last servo compared to the first servo. The radio is not going to set up some sort of Master-slave servo/channel mix.

Again, channels 1,2,3,4 are in one group.  
Channels 5,6,7,8 are in a second group
Channels 9,10,11,12 are in a third group.

The signal will get to the servos within each of those three groups at essentially the same time. WHat is plugged into those channels and what function you have assigned those channels is irrelevant from the standpoint of the radio.

So say you had 4 aileron servos, 2 per wing. You plug the left wing servo into channels 1 and 9. You plug the right wing's servos into channel 2 and 10. The two servos on either aileron will not be in synch as far as time that they receive a signal so there may be a potential latency issue. In other words, the servos may "fight" each other.

Channel one is not going to "say" to channel 9 "hey I am in charge and take your lead from me" as far as the timing of the receipt of the signal to move. They will act together in the sense that they will move in response to the aileron command and in the same direction.


Richard Strickland wrote: 


So if I plug say 6 ailerons in to channels 1-6 like the original Futaba MZ web main page shows, we would have to compensate somehow with End Point Adjustment and Servo Speed on two? That doesn't seem right.  It would seem more logical that in a non-grouped setting--but effectively grouped--like ailerons, twin elevator halves, or flaps, you would want them in the 1-4, 5-8, etc. groups--but if you are specifically 'telling' those servos "Pal, you are tied to this guy and he's the boss--you do what he does."...wouldn't the 'grouping' function operate that way?
RS
 



 		 	   		  
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