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Delayed Full Throttle

Old 06-09-2011, 05:23 AM
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jhatton
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Default Delayed Full Throttle

I have been working with Bob Noll on his conversion to E power. He has an integral set up the same as mine with the Hacker a60-20. The only difference is he is using a ICE-HV80 and I am using an HV-85 with the same programming. When he advances his stick to full throttle it does not always advance correctly there is as much as a 1.5 second delay from the stick input to the motor spooling up. Has anyone seen this behavior before, it is nothing I have seen on any of my setups.
Old 06-09-2011, 09:34 AM
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Dean Pappas
 
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Default RE: Delayed Full Throttle

Hello,
You say delay, but is it a pure time delay and then something happens, or is it a slower ramp-up in RPM?
Is it consistent?
Are there any funny or different sounds when the delayed/slow throttle-up occurs?
is this only from a stop, or from running at low RPM?
Can you make it happen repeatably by changing the time spent at the low RPM?

The ESC has a ramp-up rate adjustment, as well.
Dean Pappas
Old 06-09-2011, 09:43 AM
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Default RE: Delayed Full Throttle

It is a time delay, if you advance the throttle to full it advances normally for the first half of the stick or so then the RPM remains constant at ~50% then suddenly surges to wherever the stick is located (usually full by that time.) It is most noticeable on a takeoff run and I have not done much testing to determine how repeatable it is. it happened on two of three takeoff runs the last time we were at the field.
Old 06-09-2011, 10:37 AM
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Doug Cronkhite
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Default RE: Delayed Full Throttle

You might consider setting your endpoints manually. This MAY be a function of the auto-calibration function.
Old 06-09-2011, 10:47 AM
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Default RE: Delayed Full Throttle

The fixed endpoints were my first thought as well.
Endpoints are set to fixed using the procedure found here

http://www.castlecreations.com/suppo..._endpoints.pdf

so I do not think that is the problem.
Old 06-09-2011, 05:14 PM
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Default RE: Delayed Full Throttle

Most good pattern setups are loaded heavily enough that they will hurt themselves if run at full throttle for extended periods of time. This also means that the stray EMF in the motor can be substantial, and can confuse the ESC - cause a loss of timing.

What your situation may be.....
The newer versions of Castle software "anticipate" noise that could cause a loss in timing. Essentially what happens -
- the ESC senses a potential loss in timing
- the ESC ceases to increase power
- the ESC makes adjustments (timing, PWM if in OR mode)
- the ESC then increases power

With the logging of the ICE, you can see this by comparing the throttle stick position vs the power out.

If you were running older software, the delay would either go away, or there would be a "screech" when timing was lost.

I'm willing to bet the throttle delay is only happening with fresh packs on a hot day at the beginning of the flight when the throttle stick is moved rapidly. It is much less likely to happen in the air when the load on the motor has decreased.

Regards,
Old 06-09-2011, 05:23 PM
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Doug Cronkhite
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Default RE: Delayed Full Throttle

Could also be max current sensitivity couldn't it?
Old 06-09-2011, 05:41 PM
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Default RE: Delayed Full Throttle

I don't think it is the current itself, but 2nd, 3rd, etc order effect of current. Less current would very likely fix the problem (albeit indirectly).

Old 06-10-2011, 11:50 AM
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Dean Pappas
 
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Default RE: Delayed Full Throttle

Oh yes, and run the control cable (the one to the RX) as far away from all the high-current wiring as possible.
As soon as the wire comes out of the ESC, make it turn at a right angle and go to the opposite side of the fuselage from the battery to ESC and ESC to motor wires.
Dean P.
Old 06-12-2011, 05:09 AM
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Default RE: Delayed Full Throttle

Well, still haven't solved the problem, but solved it indirectly... He pulled out the ICE HV 80 and plugged in an HV 85, no more problem... I will see if I can borrow his ICE HV 80 and plug it into my setup and try to diagnose what is going on.

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