Mezon 130 Governor

[Seasick78]

[Puttputt maru]

Originally Posted by F1 Rocket

Plug the red data lead from the Mezon into the Jeti Box and run the machine on the bench with no blades. The Jeti Box will display the RPM. Adjust the throttle setting to get the RPM you want.

Danny

And we were trying to look intelligent by making it complicated. Thanks F1 Rocket, one more reason for Jeti to be great to use.

Don't forget to remove the tail blade too (don't ask)

[JRAY]

Originally Posted by Puttputt maru

Don't forget to remove the tail blade too (don't ask)

[im4711]

Originally Posted by F1 Rocket

You can read this with the standard Jeti Box too. Just plug the red lead from the Mezon into the Jeti Box. ...

Danny

Thats the way I do it with my Mezon -> the values are really accurate.

[marcosp]

Your middle is the percentage between min and max. If you set 1400 and 1800 then 50% will give you 1600, 25% 1500,75% 1700, 0.1% or 1% 1400. Get it? Your rpm are the % of the difference, if as in this case it's 400 rpm then 50% is 200 you get 200 more than min, 1400 + 200 = 1600.

It is usually recommended to place the min a bit lower so that percentages are reasonable, say 1200 and 1800, then a Normal of 1600 is achieved at 66% and 1400 at a more reasonable 33% instead of 0.1%. I would put 1200 and 2000 and have 1400 25%, 1600 50%, 1800 75%.

[marcosp]

I really like this system because you can get precise rpm without having to program de ESC each time as the CC. You set the range and then know exactly what each % gives you and you can change rpm to any exact value without ever touching the ESC again. You also have unlimited speeds, I use Normal and 3 Idle Ups for instance for 4 total rpm. You can't do that with CC if programming precise rpm and you can with K but always guessing the real rpm.

[JRAY]

Originally Posted by marcosp

Your middle is the percentage between min and max. If you set 1400 and 1800 then 50% will give you 1600, 25% 1500,75% 1700, 0.1% or 1% 1400. Get it? Your rpm are the % of the difference, if as in this case it's 400 rpm then 50% is 200 you get 200 more than min, 1400 + 200 = 1600.

It is usually recommended to place the min a bit lower so that percentages are reasonable, say 1200 and 1800, then a Normal of 1600 is achieved at 66% and 1400 at a more reasonable 33% instead of 0.1%. I would put 1200 and 2000 and have 1400 25%, 1600 50%, 1800 75%.

Yeah, I pulled the blades, hooked up the Jeti box and messed around with it. Rpm readout right on the Jeti box. So easy! I got it set about where I wanted it. Thanks for the input.....everybody!

[mkovalcson]

Very nice setup. One day if I ever build another heli, I'll need to try one out.

[JRAY]

Originally Posted by mkovalcson

Very nice setup. One day if I ever build another heli, I'll need to try one out.

You should. I really like it.

[Seasick78]

Originally Posted by marcosp

Your middle is the percentage between min and max. If you set 1400 and 1800 then 50% will give you 1600, 25% 1500,75% 1700, 0.1% or 1% 1400. Get it? Your rpm are the % of the difference, if as in this case it's 400 rpm then 50% is 200 you get 200 more than min, 1400 + 200 = 1600.

It is usually recommended to place the min a bit lower so that percentages are reasonable, say 1200 and 1800, then a Normal of 1600 is achieved at 66% and 1400 at a more reasonable 33% instead of 0.1%. I would put 1200 and 2000 and have 1400 25%, 1600 50%, 1800 75%.

With fixed end points 1.10 to 1.90 my minimum is at 21%. Lower than that and the motor doesn't engage. 100% is max though...

[JRAY]

Originally Posted by Seasick78

With fixed end points 1.10 to 1.90 my minimum is at 21%. Lower than that and the motor doesn't engage. 100% is max though...

that's kind of how I'm set up now. I can't hit the 1400 bottom because I have 0 as bottom in normal mode as a secondary safety.




On a side note, what kind of head room do you need to leave the governor? In other words, can I run 1900 rpm max with this setup or does 1800 need to be my max?..........

[Seasick78]

The ESC has active freewheeling. As far as headroom goes I use the following formula and it always works fantastic:

Nominal voltage multiplied by motor kV, divided by gear ratio, minus 10%.

[JRAY]

Originally Posted by Seasick78

The ESC has active freewheeling. As far as headroom goes I use the following formula and it always works fantastic:

Nominal voltage multiplied by motor kV, divided by gear ratio, minus 10%.

Thanks for the formula! 44.4x510/11.48=1972-197=1775. That means I need order a 15t pinion. Thanks again Seasick.

[F1 Rocket]

FYI, I run a 15T pinion with the Neu motor and Mezon 130 in my TDR for most flying. 16T is used for speed flying.

Danny

[JRAY]

Originally Posted by F1 Rocket

FYI, I run a 15T pinion with the Neu motor and Mezon 130 in my TDR for most flying. 16T is used for speed flying.

Danny

Thanks, Danny. I thought that I remembered you telling me that. I think I'll order both of those.

[Puttputt maru]

Originally Posted by F1 Rocket

You can read this with the standard Jeti Box too. Just plug the red lead from the Mezon into the Jeti Box. While this is the techy way to do this, I'm old and lazy so I just tweak the T-curve until the machine sounds nice. Of course I also have the option of having my TX call out the RPM too

Danny

I had to make a Y connector to plug the JB there, otherwise when I was unplugging the red lead my Jeti transmitter was saying "Connection lost". It worked very well though.

I must be going deaf cause I tried also to have my DC-16 call out the RPM but I couldn't hear them clear enough with the darn helicopter and motor rumbling while spooling up in my shop.

[F1 Rocket]

That's what the head phone jack is for

Danny

[Puttputt maru]

Originally Posted by F1 Rocket

That's what the head phone jack is for

Danny

Now I feel stupid Never crossed my mind

[666yeti666]

Hi All,
I want to make a small comment on governor and that is, when setting up a proper governor, the throttle channel needs (at least) about 20% of headroom in order to allow it to work well under heavy loads.
You can read out the percentage of the throttle channel on the Jeti box at the right top. So should be around 80% during the highest headspeed.

So at first you can program the required headspeeds, eg. 1800, 2000rpm on the kitchen table without any blades and read out the throttle channel (then you will see quite low throttle channel ‘percentages’ since there’s no load).
And then you do this again when the blades are on when flying out in the field.
Based upon this reading it may be necessary to decrease or increase the number of teeth on the motorpinion to make optimum use of the efficiency of the controller (100% throttle channel has the lowest dissipation).

Sebastien

[Puttputt maru]

Originally Posted by 666yeti666

Hi All,
I want to make a small comment on governor and that is, when setting up a proper governor, the throttle channel needs (at least) about 20% of headroom in order to allow it to work well under heavy loads.
You can read out the percentage of the throttle channel on the Jeti box at the right top. So should be around 80% during the highest headspeed.

So at first you can program the required headspeeds, eg. 1800, 2000rpm on the kitchen table without any blades and read out the throttle channel (then you will see quite low throttle channel ‘percentages’ since there’s no load).
And then you do this again when the blades are on when flying out in the field.
Based upon this reading it may be necessary to decrease or increase the number of teeth on the motorpinion to make optimum use of the efficiency of the controller (100% throttle channel has the lowest dissipation).

Sebastien

Could what you said explain what I am asking there:

https://www.helifreak.com/showthread.php?t=522806

I would like your comment if you can

Thanks