Throttle in TX and LogView are not the same

[Chris_M]

My throttle values in my TX are set at 60%-65% and 70% but when I view them in LogView they are all 5 points lower. Is it normal or is the software really that accurate?

[dl7uae]

Chris, JLog tells you how the JIVE sees the throttle pulse length. And only this counts.
Repeat the setup of a mode w/ the JIVE, so it will learn the throttle travel again.

Tom

[Chris_M]

Ok ill try it...thanks Tom

[GimpyGolden]

Same here.
On HJ Mode 4 I logged a flight running 60% on Tx and log shows 52%.
Just dawn'd on me now I never did M1 then M4, went straight to M4.
Would this cause the discrepancy?
Also calibrated endpoints after setup 78% high & low on Futaba but all my other regular Jives come out 81%.
Should I be doing endpoint cal with Heli Jive?

[dl7uae]

Should I be doing endpoint cal with Heli Jive?

Not absolutely necessary.

A JIVE starts the commutation (spoolup w/ governor modes) at 12% throttle in his view.

There is a mode specific, non-linear uplift throttle-PWM (PWM ist the "inner throttle" so to say, but "throttle" shows the impulse length as seen in the input) and that uplift is a bit different between a "normal" and a H/JIVE. Look here. -- But there is NO difference in throttle pulse length mapping to % between both types of JIVE!

Learning of the endpoints by a JIVE: The lower endpoint is learned at the time you pull the jumper, the higher endpoint, if you select a mode by stick. So the throttle travel in the transmitter should be 0..100%, respectively -100..+100, for that purpose and not necessarily changed afterwards. So it depends on the transmitter's throttle curve and your stick position during a mode setup how big a later noticed deviation will be. The ESC normalizes the later seen pulse length (mapping of length to %) on base of the two lengths seen and learned as endpoints.

Summasummarum: A small deviation is no problem. Btw: The impulse length from a transmitter/receiver may drift a bit, also there is a little TC.

Tom