I have been observing that there are 3 major issues a newbie faces with a computerized radio :
1) Trimming out the plane on the first flight in the case of a good old fashioned radio is much easier as trim movement is physical and not digital
2) Trimming itself involves assignment of % which a a newbie knows little about
2) Servo reversal involves going into the menu
A very experienced old time Aero Modeler from Chennai made this observation initially and since then I have been looking at it and find it is has its merits .
So I thought may be others training newbies from other areas could also add their experiences as well on this as well as any other points they feel.
The simple old way seems to be better for the first radio.
Sai
Another common problem I have come across is the color coding of wires for the servo or ESC to receiver :
1) White OR Yellow is the signal wire
2) Red at the center is the Positive
3) Black or Brown is the negative
Connection polarity on the receiver is normally :
+ ve ( red )is the Center pin in the receiver
right side of center +ve ( red) is -ve ( black or brown )
Left side of center +ve ( red ) is signal ( white or yellow )
This is true in 99.99 case of receivers .
Please add exceptions .
Sai
Sai
How does one help define the "right" or "left" side. In the case of Futaba, there is a flange or key on the signal side. The "flat" side is negative.
From my experience, ALL positions are the same, except for the colour, as you have mentioned. One has to be careful if you are using JR or HiTec servos with Futaba, particularly.
Sushil ,
As I said it is valid in most cases and now a days with various types of servos available not all come with the slot type futaba connectors so I have observed a simple method to determine the wires which has worked well for me till date to even explain over the phone to newbies .
ie ( image attached )
take the receiver and have 3 pins of each channel facing you then fix the +ve as the center then you have one pin to the right and one to the left in each channel then follow what I have mentioned above .
This has worked for me in most cases but there are exceptions .
Quotetake the receiver and have 3 pins of each channel facing you then fix the +ve as the center then you have one pin to the right and one to the left in each channel then follow what I have mentioned above .
Sai, thanks. This is precisely what I was asking. A clear, unambiguous way, to define "right". Will surely help the ones who need it.
Sorry, I am getting old ;)
I cannot see how this removed the ambiguity. What part of these instructions prevent the user from holding either the receiver 180degrees rotated from how it is shown in the picture, or rotating the servo connector 180 degrees ?
the problem me and my colleagues faced is:
we generally prefer scratchbuilding from biofoam. but the sheest in transport gets slightly curved, which creates a problem.. specially in rudder.
i ordered a big lot of biofoam frm ADPLAST Mumbai but to my disappointment all sheets are a bit curved. in fuselage we make it by stichking two like mirror images but wings and others where single layer of sheets are to be used are a big problem.. and rudder, where that curve is not symetric to the plane body, its very dif to trim.. whatever i do, plane alwas is not trimmed..
i think this issue cant be solved.. only is to use planar sheets.
if any one has some suggestion, pls share !!!
Quote from: anwar on January 14, 2010, 03:06:08 PM
Sorry, I am getting old ;)
I cannot see how this removed the ambiguity. What part of these instructions prevent the user from holding either the receiver 180degrees rotated from how it is shown in the picture, or rotating the servo connector 180 degrees ?
Agreed ,
please add that the writing on the receiver should be the rightway up and facing you or if the pins are on the side " GOD HELP YOU " ;D .
I am not able to think how to instruct on the pins .
But my description above works for at least around 70 % of the receivers i guess
Sai
Amir ,
I stick to Coro becuase of these problems with Bio foam ;D ;D
My Two paise worth of posting specifically for the Dx6i 2.4 GHz with color codes explained in this post
http://www.rcindia.org/beginners-zone/connecting-servo-to-receiver-and-binding/msg8982/#msg8982
regards
Pankaj