Hobbywing 60a platinum governor mode questions!

[Daniel880516]

Hello guys, sorry for some noobie questions here but this will be my first time trying a governor mode, and I just want to make sure if I do things right.

So I'm understanding governor mode allows you to keep a constant head speed similiar to a flat throttle curve from your transmitter.

I have the programming card and I can set governor low, and governor high, which one should I use?

Right now my PWM is set to 12KHz, and Advanced Timing at 15 degree. Do I need to change anything to make the governor run better?

If my transmitter is currently running 95% flat curve, to achieve the same headspeed in governor mode, do I also use the same flat throttle curve?

I'm currently running 9 tooth pinion, do I need to up to 10 tooth to allow the governor to work better for the desired 95% flat curve mentioned above?

How do I initialize my heli from now on? I'm using ar7200bx, there are few times I turned on the heli with my throttle hold engaged, after beastx initialized when I release throttle hold the heli will want to spool up (with no governor mode).

This is the most confusing part for me, my tx has only 2 flight mode, so my normal flight mode TC is linear 0 25 50 75 100, the governor mode will not engage when I take off with normal flight mode? and also landing as well if I must only use throttle hold?

So far these are my concerns, thanks in advanced if you would chime in to enlighten me!

[xspare]

You need to do the math, using the equations and graphs in the manual, to figure out which governor setting to use. Not sure I've done it 100% correctly but it should get you started.

Look on the graph for high-gov, at 80% throttle you find the ESC will drive a two pole motor at 97000 RPM. The Atom's 8-pole motor will turn 4 times slower. Then apply the gear ratio for the main gear and pinion.

Head speed = 97000 RPM * (pinion teeth / main teeth) / ( 8-poles / 2-poles )

or

Head speed = 97000 RPM * ( 9T/78T) / (8P/2P)

HS = 2798 RPM

If you use the low-gov at 80% throttle, the graph shows the ESC drives a two pole motor at 21000 RPM, so it would be 4.5 times slower, or only 605 RPM. (yikes!)

CAUTION:
Note what happens if you accidentally get your throttle running at 100%... head speed is off the wall at close to 5800 RPM.

[xspare]

I've run HW ESCs in governor mode on another heli and had it set up to govern at like 2200 RPM in flight mode 1, 2800 RPM in flight mode 2, and throttle hold would kill the motor. I would plug in the battery with the transmitter on T/H and use very soft start to spool up to whatever flight mode RPM I wanted to use.

The manual says:

"Please note that the governor mode function is automatically disabled if the throttle volume is less than 60%."

I think they are really trying to say that the motor is disabled for throttle settings below 60%, but I would just avoid anything between 0-60%.

[Daniel880516]

Originally Posted by xspare

I've run HW ESCs in governor mode on another heli and had it set up to govern at like 2200 RPM in flight mode 1, 2800 RPM in flight mode 2, and throttle hold would kill the motor. I would plug in the battery with the transmitter on T/H and use very soft start to spool up to whatever flight mode RPM I wanted to use.

The manual says:

"Please note that the governor mode function is automatically disabled if the throttle volume is less than 60%."

I think they are really trying to say that the motor is disabled for throttle settings below 60%, but I would just avoid anything between 0-60%.

Thanks many xspare! I'm starting to get the hang of it now, but I don't really understand the throttle hold would kill the motor part? So you basically soft starting your heli in idle up if I'm understanding correctly? If I flip the switch back to my flight mode 0 with 0 25 50 75 100 the motor will simply not spin right?

[xspare]

No, no, you're really meant to use flat curves everywhere when you're using the governor mode -- no more normal mode, only the equivalent of "idle up", for all flight modes.

The "very soft start" is just one of the ESC settings which prevents it from trying to spool up too fast. You plug in the battery with the TX on throttle hold. Then when you disengage T/H the ESC will gradually ramp up to the RPM indicated by your (now constant) throttle output.

[xspare]

One last thing. You should tach your heli to see what your current head speed is and to verify that you've setup the ESC governor mode (and your transmitter) correctly before flying.

You can get the headspeed apps for smartphones, or you can use my youtube tutorial and your own videos:

[ame]http://www.youtube.com/watch?v=giNRksfMpCQ[/ame]

[w4llet]

Originally Posted by xspare

One last thing. You should tach your heli to see what your current head speed is and to verify that you've setup the ESC governor mode (and your transmitter) correctly before flying.

You can get the headspeed apps for smartphones, or you can use my youtube tutorial and your own videos:

http://www.youtube.com/watch?v=giNRksfMpCQ

I just saw your video.

Amazing.

Better than my phone app

[Daniel880516]

Yes! Xspare is the man!

[TallPaul]

I have a related question - when you set your throttle at 80% (or what ever), does this assume maximum end-points?

I have a DX8, so do I increase the travel adjust to 150% to get the full throw of the throttle channel

[xspare]

Great question. Unfortunately the answer isn't very satisfying: it will depend on the ESC - and this is why you should tach your heli.

For example, people would babble in great detail about idle-up curves on the Blade 400, but when I measured that ESCs behaviour I discovered that the stock ESC would peg at 80% (using 100% EPA), which was below most of the values folks tend to use.

https://www.helifreak.com/showpost.p...63&postcount=6