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Other › Brushless ESC govenor question..
01-27-2007 08:19 PM  10 years agoPost 1
DaveMasoero

rrNovice

UK

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I may have missed something obvious here, but....

(theoretical at the moment, I've not been brave enough to try govenor mode yet )

Assume..
1. Govenor mode
2. One of my throttle curves is a normal linear one.
3. The other is about 75% flat.
(sound about right so far?)

How do I get from 0 RPM to govenor mode?

Do I spin up in linear mode and then switch to gov mode, and hope the pitch/rpm change does not throw me in to the wild blue yonder?

or

Do I just flick the switch and hope the soft start on the controller spins up the rotor nicely (without destroying the tail boom or shreading the gears)?

or

Is there another way that I have not thought of?

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01-27-2007 08:28 PM  10 years agoPost 2
z11355

rrMaster

New England

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you set the throttle curve in ID1 & 2 to a horizontal line who's value
will set the gov speed.

In Normal mode, the first point starts at zero and you rapidly
ramp up to a horizontal line

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01-27-2007 11:57 PM  10 years agoPost 3
DaveMasoero

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UK

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Thanks for the response.

I think I understand what you are saying, but I only have a three point throttle curve. This will put my hover point in the transition between ramping up and flat govenor!
Should I push my half way point (point 2)of my "normal" throttle curve to past the 75% I require for the transition into "govnenor" curve(flat). This would make the head speed artifically fast and give me the RPM I require without the pitch for take off!

I would need to remember to be at zero throttle (or very close to..) before switching back to "normal" mode for spooling down the head after the flight.

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01-28-2007 06:06 AM  10 years agoPost 4
Rob_T

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..

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I only have 3 point curves on my DX6. I set the normal curve at 0-100-100 and the stunt (idle-up curve) at 100-100-100. My pitch curve is a straight line, so in normal mode full head speed is reached at 0 pitch, so the hover point (at 75% stick) is well clear of the point where the head speed starts to change.

I do nearly all of my flying in idle-up. This is a matter of personal choice rather than needing to with this setup.

For some versions of the Castle firmware, Castle recommends using a flat curve (100-100-100 for example) and then using soft start and using throttle hold to stop/start the motor. It works quite well!

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01-28-2007 11:43 AM  10 years agoPost 5
DaveMasoero

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UK

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Hi Rob

Thanks for your reply.

I guess that you have the full -ve to +ve pitch range, this is why your hover point is at 75% stick?

I am still only using +ve pitch, so my hover point is at 50% stick.

However, you have given me an idea. If I reduce the middle point of both my pitch curves to near 0%, have the two throttle curves as 75,75,75 and 0,75,75, I can then swap modes at 50% stick with no ill effects.
The pitch will be twice as sensitive, as far as I am concerned, but should be no more sensitive than an full -+ve pitch range.

Any comments?

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01-28-2007 05:54 PM  10 years agoPost 6
Rob_T

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Yes, I have a full -ve to +ve pitch curve, so that's why I hover at 75% stick. My setup means that I can switch in and out of idle-up without any sudden vertical movement while hovering. My pitch curve is different in throttle hold to make auto rotations easier (although I'm not very good at those yet).

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01-30-2007 07:29 PM  10 years agoPost 7
rotoryrob

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Auburn WA

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gov mode

just to make sure I got it right in the pheonix HV 45 there are 2 settings for gov mode. low gov mode and high gov mode. What is the difference in the two. I hear talk of setting the desired head speed by where the top of the trottle is. Would that be what they consider high gov mode?

Rotoryrob

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01-30-2007 07:42 PM  10 years agoPost 8
murp

rrApprentice

Nova Scotia, Canada

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No, high and low gov modes are there becuase some motors will work better in one mode than the other. Basically try low gov mode, if everything works out then you're golden. If your motor does not attain the desired headspeed use high gov. Check CC's website for more details.

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