Opto 130 settings

[helimadness]

Hi All

just set up my Goblin with Scorpion opto 130 ESC, Align 750 mx 450 kv and using the Vbar Gov.

I used the program software opposed to the remote which I dont really like.
Current setting are
Mode = external gov mode
Low voltage cutoff limit = 36
low cutoff output type = cut 50% max power
Motor acceleration = .15
current protection = on
motor timing = 5

Dont really understand the motor timing. Just want to make sure I have a safe setup that is not going to stress the ESC. Only done one flight so far and seemed fine.

Also does anyone know what the "sweet spot" is for throttle % with this esc so I can fine tune my gearing. At the moment a small pinion so using about 90-95%. How much head room do you need for the Vbar Gov to work properly?

Cheers

[George J]

Timing on 5 is stock setting (if I remember correctly!!) and will be fine.
Not sure what the gearing is on a Goblin but can tell you that when I set my Srimok Faifa up I had a 12t pinion which gave me a higher HS than I wanted so emailed Scorpion and got a very thorough reply back but the up shot was that the Scorpion 130 can be run with very low throttle curve (as low as 40%) without stressing the ESC which is how I ran it at first with no problems, the esc was always cold after a flight. I did however buy an 11t pinion in the end just for peace of mind and so I could up the curves a little (I was using the Scorpion internal gov then though)
If you're getting the max HS required at 90/95% throttle then that sounds like good gearing with the vbar gov.
Headroom in the esc doesn't effect how the vbar gov works, all vbar is taking from the esc is motor rpm/pulse then vbar decides what power to send to the motor.


George

[helimadness]

Timing on 5 is stock setting (if I remember correctly!!) and will be fine.
Not sure what the gearing is on a Goblin but can tell you that when I set my Srimok Faifa up I had a 12t pinion which gave me a higher HS than I wanted so emailed Scorpion and got a very thorough reply back but the up shot was that the Scorpion 130 can be run with very low throttle curve (as low as 40%) without stressing the ESC which is how I ran it at first with no problems, the esc was always cold after a flight. I did however buy an 11t pinion in the end just for peace of mind and so I could up the curves a little (I was using the Scorpion internal gov then though) If you're getting the HS required at 90/95% throttle then that sounds like good gearing with the vbar gov.
Headroom in the esc/curves etc doesn't effect how the vbar gov works, all vbar is taking from the esc is motor rpm/pulse.


George

Thanks for the reply. So if I go the bigger pinion and have to run at say 80% it should be fine. The standard one will only give me a max of about 1950 or so at 100%. Im happy to run with that as a max for now but might end up with 100% throttle.
So what you are saying is running at 100% throttle is ok as it will only be limited to the motor gear setup. Which if that is the speed I am looking for will be fine. Then if the head speed drops below that 100% the ESC will pump more power in to maintain it. Is that right? But what if the motor is already max and the speed dropping, isn't there no room left to increase the power? Little confused thinking about that one.

Ill give it another spin up tonight without blades and see what I get.

Cheers

[George J]

You could run 100% flat curve if you like as Vbar, not esc, decides what power is needed to send to the motor to keep the target HS but think I would go up one or two teeth on the pinion to give yourself a bit of room personally, that would allow a higher HS if you wanted it also. You'll be nowhere near maxing your motor so that's not an issue!
If you were using the Scorpion internal gov then yes running a 100% flat th curve would give you no headroom for the gov to work efficiently but as you're running vbar gov this headroom is not needed also bearing in mind that to run at the max required HS in vbar you'd need a 100% flat curve anyway.
Your max HS @ 100% th in vbar gov is limited at the moment by your gear ratio and not headroom in the esc.

George

[Rctintin]

Trying to remember my settings in my TDR with the 130 ESC and V-Bar gov. I set it exactly as per MrMels vid, and it has been stunning. This is as low as 1300hs upto 2000hs.

I believe I am right here, ( but may not be!!) that you don't use percentages as you are describing. You go into your V-Bar gov 2 page, and tell it your gear ratio and max required HS. Then it tells you the % is 100% for your max, and then you can lower you flat line throttle curve for the lower HS's. Use the live RPM readout on the screen to choose the lower HS percentages.

I shill be re visiting all of this at the weekend as ANGRY heli is about to be completed!!

you will need a bigger pinion though, because of your low KV on the motor.

[helimadness]

yeah watched Mr mels vids they are excellent. Set up the same. He just had a different heli and motor. Not sure how the timing thing works so just checking?

I set up the Vbar as 2200 max but will never get there with my gear ratio. Just put it in more as a top end safety limit incase I messed up my calcs.
I have throttle % in the TX set to 90% in normal then 92.5% idle 1 and 95% idle 2. On the Vbar live screen with no blades sitting on my desk got about 1720, 1820 and 1920 something like that. Was just over the round figure from memory. They said stay within 17-1800 for the first few flights to run in. I happy to keep to a lower speed for now. I think 1900 will be plenty and thats at 95% on the TX, Which should be 95% of the real max as the upper limit is not limited by the Vbar but the motor / gearing limit.

So if Im happy to run at 1900 max is it going to be more efficient / better for the Throttle % to be at 95% or should I get a bigger pinion and run around the 80 somethings. I have a 24T as well, all they had in stock when I ordered. So could put that on. Just need to work out whats best. Think it will be ok as is for now??

Cheers

[George J]

If you're happy with 1900 as your max hs and you get that at 95% th then that's totally fine, you don't need to change anything, vbar gov can run with no problems @ 100%.
On my 700DFC my idle ups are 92 and 96%.

George

[helimadness]

If you're happy with 1900 as your max hs and you get that at 95% th then that's totally fine, you don't need to change anything, vbar gov can run with no problems @ 100%.
On my 700DFC my idle ups are 92 and 96%.

George

I think more than enough for now. I had my maiden flight on the weekend. First time I had flown anything bigger than a 500. Going to take a bit of getting used to before Im throwing it around like the 500 so I think 1900 will be fine. Have got the smaller tail belt pulley ordered to handle the lower speed. Time in the air I think is more important at the mo.

Cheers
Mark

[George J]

At 1900 it'll still have bags of power. :-))

George