ORIGINAL: MikeEast
ORIGINAL: opjose
Ah ok. Thanks now I get it.
Makes sense....
As to the last lines ...the radio is commanding that the servo be at a specific "point", so if the analog servo is pushed off this position, then because the radio is telling it that it should be at say 25 degrees, the servo attempts to move back?
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Conversely from what you are saying, the digital servo tries all the harder so to speak to hold the 25 degrees.
Well I am not exactly certain about the relationship between the Transmitter and the servo, but in general, it is my understanding that a digital servo translates the input signal from the transmitter into a specific position of its shaft (or something liking to that thought line),
That is more like PCM than PPM
whereas an analog servo sees the signal as a certain amount of current it supposed to use to turn the shaft but is not cognisent of its shaft position in relationship to that signal. An analog servo understands the signal as "here are some electrons,,, do what you will with them".. A digital servo understands that the transmitter is saying "here are some electrons, use them to go to 20 degrees shaft deflection and if thats not enough, I have more" Up to a certain point of course.
In PPM the RX determines via decoding the pulse position into a voltage level which tells the servo where the servo should be and sends a signal to the servo. If the feedback pot in the servo doesn't think it is already there the amp in the servo will command a move until the pot "nulls" the voltage.
Thats my understanding.
Speak up gurus.... I dont want to mislead anyone here... I am trying to translate MY understanding of the difference in digitals and analogs into understandable terms but heck I could be totally wrong I suppose since I am not an electrical engineer...