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  1. #1
    Moderator rajul's Avatar
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    Setting endpoint/centerpoint using HFP-20 or programmable Tx

    Hi, are there any pros/cons in setting the centerpoint and end-point of the 7955 using the HFP-20, or by using a programmable radio? Is the servo linearity different when doing this using the HFP-20, or through the radio? Thanks!
    Mike Marks
    RCU Moderator
    Aerofly Support Representative http://www.aerofly.com/index.html

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    RE: Setting endpoint/centerpoint using HFP-20 or programmable Tx

    thats an excellent question and I wish someone would answer it.

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    RE: Setting endpoint/centerpoint using HFP-20 or programmable Tx

    Not sure if this is what you're asking, but here goes.

    The down and dirty answer is that the first thing I do to a new program is to max out the ATV percentages on the transmitter.
    If this isn't done, you are not using the full potential/resolution of your transmitter or servo.
    My typical servo resolution is 55° in each direction, and JR ATV at 150%
    If I set up my linkages correctly, I'll never have to reduce any ATV in the transmitter.
    It's all done with control horn height, and pushrod length.
    It's amazing how the throttle and controls feel when it's done this way.
    Works too!


    So that being said, ask your question again and give some detail as to how your transmitter and servo are set up.


    Take care
    Bob

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    RE: Setting endpoint/centerpoint using HFP-20 or programmable Tx

    May I piggy back on the question ?

    My question is not so much how to set up servos but whether using the programmer HP-10 or the tranmitter functions makes any difference. As far as I can tell it doesn't but I would like confirmation.

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    RE: Setting endpoint/centerpoint using HFP-20 or programmable Tx

    I would max out your transmitter and see if it gives you what you want in the amount of throw.
    If not, then program the servo.

    If they are ganged, use both.

  6. #6
    Moderator rajul's Avatar
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    RE: Setting endpoint/centerpoint using HFP-20 or programmable Tx


    ORIGINAL: rajul

    Hi, are there any pros/cons in setting the centerpoint and end-point of the 7955 using the HFP-20, or by using a programmable radio? Is the servo linearity different when doing this using the HFP-20, or through the radio? Thanks!
    Hi Mike Mayberry, I appreciate some inputs from you on my question. Thanks
    Mike Marks
    RCU Moderator
    Aerofly Support Representative http://www.aerofly.com/index.html

  7. #7
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    RE: Setting endpoint/centerpoint using HFP-20 or programmable Tx

    If you are using only one servo per control surface then you will notice no difference if using the radio or HFP programmer. It's when the servos are ganged that you must use the programmer and not the radio to set up the servos.

    Mike.
    Hitec RCD Rep
    http://www.hitecrcd.com

  8. #8
    Moderator rajul's Avatar
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    RE: Setting endpoint/centerpoint using HFP-20 or programmable Tx

    Hi Mike, If the servos are ganged with each servo assigned to separate radio channels (not through a y splitter), will it make a difference? Each servo can still be adjusted individually through the radio. In this case, what are the advantages of using the HFP? Thanks
    Mike Marks
    RCU Moderator
    Aerofly Support Representative http://www.aerofly.com/index.html

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    RE: Setting endpoint/centerpoint using HFP-20 or programmable Tx

    rajul -> Your way is sort of like using a matchbox, or the programmer, and works great until there are no more channels left.

    I did it that way on a 40% using a 10X and a point mix.
    Just ran out of channels after awhile.

  10. #10
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    RE: Setting endpoint/centerpoint using HFP-20 or programmable Tx

    Using the programmer will assure the settings never change and will absolutley sync the servos perfectly. I cannot guarantee this using the radio to set each servo. That's not to say that you shouldn't use the set up you suggest... it's just that using the programmer is the optimal method.

    Mike.
    Hitec RCD Rep
    http://www.hitecrcd.com

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    RE: Setting endpoint/centerpoint using HFP-20 or programmable Tx

    I have found the HFP-20 to be of tremndous value in setting up a biplane. If you have all 4 aileron servos on seperate channels you can dial them in with the radio.... if not and have the right top and bottom ailerons on one channel and the left top and bottom ailerons on another channel the HFP-20 makes it possible to get a very precise set up.

    I am glad I bought one.... I fly Ultimates

  12. #12

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    RE: Setting endpoint/centerpoint using HFP-20 or programmable Tx

    To setup an MXS-R which has large control surfaces to fly IMAC. Which does not need 3D surface deflection. Which method is best, reduce the servo travel by setting the end points in the transmitter or using HFP-25 to set the the servo end points. Both method can be set to get the same result but which will give the best in flight feel and stick movement to surface movement resolution.


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