jeti spin 66 esc

[odieser]

Anyone have experience with this esc infinity hobby is featuring this controller and a z30 motor and I am curious oin its performance
Thanks for any input
Mark
http://www.infinity-hobby.com/main/product_info.php?cPath=32_90&products_id=1842

[mbigby2]

I have several of these in planes. The spin's are nice because they have a high quality BEC and because they are field programmable w/ the SpinBox. You'll need this device to have reasonable success w/ the governor settings.

I struggled to setup the governor mode on one of these. Manual is a train-wreck in terms of explaining the setup mechanism. An interesting deal about the Spin is that it has an absolute RPM mapping from throttle value. You actually set the number of poles in the controller and then say what RPM's 0% and 100% throttle map to. The controller actually stores a bunch of statistics like min/max/avg current/battery volts/rpm. You need this because to set up the governor you need to measure max rpm and then specify it in the 100% setting. You also should not use the default throttle range, but instead measure it via the spin box so that it has the best mapping of your transmitter. It also has two governor modes (normal and 3D). I can't find anywhere that these are explained. I'd assume it has to do with the gain values, but there are other places that this can be set.

I found the heli-governor defaults to be insane on the SPIN and the spool-up speed to be borderline-dangerous. You'll definitely want to go twiddle with the defaults. Having said that, it feels pretty precise once I wrapped my noodle around it, and you get a tachometer and limited data logger for free...

[odieser]

so having said that would you if the option was presented go with the spin esc or a more well known align esc

[mbigby2]

I've never used the align ESC. I'd probably stick with the devil I know vs. the devil I don't, but the cost difference is significant. Especially since you'll need the spin box.

Hehe. Re-reading my original post, I suspect I wasn't clear in my original position. I like the Spin, it seems very clear now that I get it. It just took me a long time to figure out what to do, and that was frustrating. Sending notes to Jeti didn't help much either.

[Finless]

mbigby2

I have a Jeti Spin O heli 77 and I thought I could figure out everything if I played with it enough. Well your right the manual SUCKS on this thing. I finally gave up and stuffed this ESC in a drawer.

Since you seem to have gotten successful with this thing can you elaborate on how to set this up and what these settings in the spin box actually do? It certainly is NOT intuiative!

In turn if I get this thing figured out I would be glad to do a setup video!

Thanks,
Bob

[mbigby2]

mbigby2

Since you seem to have gotten successful with this thing can you elaborate on how to set this up and what these settings in the spin box actually do? It certainly is NOT intuiative!


Sorry it took so long to get back to this. I've been knee deep in broken gears and learning curve. Ok, here's what I did w/ my Spin 55.

1. Measure the endpoints of my throttle channel. I did this by plugging the throttle channel of my receiver into Hitec servo programmer w/ a male-mail servo extension. The same can be done w/ the SpinBox (though I haven't done it). I have also read that you can get this by using using the throttle to set one of the pre-programmed modes. When you put it in program mode by powering on the controller w/ the throttle in the high position, waiting until it chirps then lowering to the bottom position, the Spin stores the limit positions. These can then be read via the SpinBox.

2. Measure the 100% throttle RPM. I used an EagleTree to measure my max RPM, but the same could be done w/ a Tach. In theory the Spin ESC can measure this for you too, but I've had weird luck here. Seems like you need an extended run to get an accurate reading.

3. Find the pole count and gear ratio for your setup. For the 1500 Watt gaui w/ the RevCo 23/68 it is: 10 poles and 9.49:1.

Now you have what you need to set up the ESC.

Plug the ESC cable into the SpinBox, unplug the motor wires, plug in a battery and turn on the ESC switch. I used the following manual settings:

Mode: Heli const. RPM 3D -- I have no idea what the difference between this and Heli const. RPM is.

Motor Pole No.: 10

Gear: 9,5 - This is as close as I can come to 9.49:1 - you've got to love the European comma-as-a-decimal-point.

Set Max. Rotor RPM: 2450 - I measured this w/ the EagleTree.

Set Min. Rotor RPM: 500 - I'm still trying to grok this setting. My best guess is that the minimum "on" throttle yields this RPM.

Sensitivity: 4 -- I left this alone. Smaller is more sensitive (gain). Larger is less.

Timing: 24 degrees -- Seems reasonable given that the Gaui is an outrunner.

Frequency: 8 KHz -- Left this alone.

Acceleration: 5s -- because the manual says to do this for helis. Still a little fuzzy on how this plays out...

Accumulator Type: Li-Ion / Li-Pol

Number of Cells: 6

LiIo/Po Cut Off V Per Cell: 3.2 -- I could probably come down here some.

Cut Off: Slow Down -- Clearly the alternate is bad in a heli.

Initial point: Fixed - 1.09 -- measured for my transmitter

End point: Fixed - 1.85 -- measured for my transmitter

Auto Inc. End Point: Off

Throttle Curve: Linear

Rotation: Left -- this setting is sorta silly, but I guess if you'd rather do it this way than swapping wires...

Timing Monitor: Off -- this is perhaps the least intelligible setting of all. Seems like turning it on makes the ESC beep at you a code that indicates the timing you chose? Bizarre.

Setting my Spin 55 like the above gives pretty predictable governor. You can pretty much exactly tell where the governed RPM is by the throttle stick position. For example 75% throttle in the above settings gives (2450 - 500) * 75% + 500 = 1962. My EagleTree chart shows this to be within 100 or so of this. Pretty cool. Having said that, I am only marginally certain I understand the settings. So who knows if I've got it wrong.