START HERE |
|
Register | FAQ | PM | Events | Groups | Blogs | Calendar | Mark Forums Read |
Unregistered
|
nano CP X Brushless Mods Blade nano CP X Brushless Mods Information and Help |
|
LinkBack | Thread Tools | Display Modes |
04-21-2017, 12:27 PM | #81 (permalink) | ||
Registered Users
Thread Starter
Join Date: Apr 2011
|
If you rewound the motor, how would you have done. turns, wire & delta? I have HP05 and want to change the shaft and rewind it. It was having hard time to start, but I found out one of wires was cut. I soldered it and seems ok now. But I want to rewind it to higher kv. Any suggestion?
Quote:
Quote:
I bought small brushless motor with 4000kv for $5. size is similar to trex 150 motor. I want to rewind it to higher kv and build another mcpx bl for just fun. |
||
Sponsored Links | |||
Advertisement |
|
04-21-2017, 12:36 PM | #82 (permalink) | |||
Registered Users
Join Date: Dec 2014
Location: Seal Beach, CA
|
Yeah I'm pretty happy with it. Works really well with BLHeli. The trick was to use the SiLabs MCU version instead of the AVR MCU version. The Silabs MCUs are faster and work the best with BLheli. The 2S version uses the same switches and also runs the XP-3A firmware version. Though it has more components because it's 2S, need things like voltage dividers on sensing and regulators for the MCUs.
Quote:
Quote:
Quote:
|
|||
04-21-2017, 01:00 PM | #83 (permalink) |
Registered Users
Join Date: Dec 2014
Location: Seal Beach, CA
|
There's no performance difference between delta and wye winding configurations. It's just a physical difference assuming copper fill is equivalent. Wye can get you lower Kv with less turns by a factor of about 1.8. It's actually root three on paper, but in reality it works out to about 1.8. So depending on motor layout wye can be better for small motors since it can be hard to get enough turns with Delta to get the Kv you want. I've done all of my small motors in a wye configuration because of the lower number of turns required. On the bigger motors I tend toward delta since it's easier to get a good copper fill. Most of the bigger motors you buy off the shelf are wound delta. The small Oversky motors can be delta or wye out of the box. The Oversky tail motors are all wound wye. The smaller main Oversky motors tend to be wye and the bigger ones delta.
|
04-22-2017, 08:07 AM | #84 (permalink) | ||||
Registered Users
Thread Starter
Join Date: Apr 2011
|
Quote:
Quote:
Quote:
Quote:
|
||||
04-23-2017, 07:45 AM | #85 (permalink) | |||||||
Registered Users
Join Date: Dec 2014
Location: Seal Beach, CA
|
Quote:
Quote:
Quote:
Quote:
There was the issue of driving the tail ESC with an output designed for a tail servo, but I shifted the signal range in the BLHeli software to make the tail ESC act like a servo and it works perfect. That was a guess and it payed out. Quote:
Quote:
Quote:
|
|||||||
04-23-2017, 07:49 AM | #86 (permalink) |
Registered Users
Join Date: Nov 2012
|
__________________
Oxy 2 FE, 180cfx spartan lynx pro tail,130x stock, Goosky S1 x 2 , mcpx stock x2, mcpx bl mod, nano cpx dbl bl, nano cpx wild bl, nano cps, DX8. For fpv Phantom 3 pro. |
04-23-2017, 01:52 PM | #87 (permalink) | ||
Registered Users
Thread Starter
Join Date: Apr 2011
|
Quote:
Now I want to build trex 150 with uBrain. I have almost everything to build trex 150. I may need one more servo & custom tail motor mount and rewind lynx 130x motor for trex 150. Even I Have a board. But i will build it with uBrain. By the way, why does this board have 2 names, uBrain & iKon? Quote:
Thank you very much for your input here. Inputs are diverted from main topic now, but it shifted to very interesting topic. Hope someone else find this thread helpful for their journey in this wonderful hobby. |
||
04-24-2017, 11:28 AM | #88 (permalink) | ||
Registered Users
Join Date: Dec 2014
Location: Seal Beach, CA
|
For whatever reason the board sells under two different names, Brain2 is from MSH who is the originator and Ikon2 from an authorized reseller, forget who. In any case it's the exact same controller, just a different badge.
Quote:
BLHeli in all its handiness allows setting signal endpoints for the ESC in software. In my case I set endpoints for the ESC to 1420uS,1940uS where it's set to 1060uS,1980uS in the controller. That way at signal center of 1520uS, there's the correct thrust coming out of the motor (1/5 throttle) to put the tail at neutral. Same thing you would normally do with a servo, that is set it so center signal is tail neutral. You might ask about the dead zone between 1060uS and 1420uS, but the motor can't reverse so that has to be a dead zone. In that range only the torque of the rotor can provide a negative tail rate. That was what I was concerned about, but it doesn't seem to bother the controller and it works fine. The controller also offers a setting to compensate for tail assymmetry. I guessed on that setting and it seems to be close enough, the tail rates seem to be fairly even in both directions. Quote:
Oh, one other thing I just thought of, it might be possible to use the multi-rotor firmware version of BLHeli which can reverse the motor. It would eliminate the dead zone, but still need tail neutral at signal center like a servo. It would provide the ability to put negative thrust on the tail same as a servo. Might work better, but what I've done works well enough and I'm probably not going mess with it. Last edited by Krager; 04-24-2017 at 12:43 PM.. |
||
04-24-2017, 11:00 PM | #89 (permalink) |
Registered Users
Thread Starter
Join Date: Apr 2011
|
Build Lightest 2S Brushless Nano CPX
Thank you for the info. I will give it try. I have never changed esc signal range in blheli software. I will play with it to see how it will affect performance.
To turn tail to counter clockwise tail motor speed needs to slow down. If motor stops or turn opposite direction, tail will spin quickly. So i think reversing motor with blheli may not be necessary. I may be wrong. What did you notice in flight with ubrain compared to stock board? More stable? Pretty sure it has piro compensation, when mcpx doesn't. How you feel it? How well does rescue function work on ubrain? Have you tried it? Does the controller have baro? Sent from my iPhone using Tapatalk |
04-26-2017, 03:18 PM | #90 (permalink) | |
Registered Users
Join Date: Dec 2014
Location: Seal Beach, CA
|
Quote:
The tail is hugely better with much less kick and no drift. Had a lot of trouble with that before. The tail would kick to a new position on a heavy pitch input and then stay there. It could also drift a little staying on one heading for any length of time. Can't get rid of tail kick a hundred percent due to the lag of a motor, but the tail quickly returns to the heading it was on. Now tail kick is just a little blip, nothing to get dismayed about. Of course it's always nice to have piro-comp. Nice it stays flat in a piro now. |
|
05-06-2017, 10:03 PM | #91 (permalink) |
Registered Users
Thread Starter
Join Date: Apr 2011
|
Installed trex 150 board on my nano cpx. Made my nano double brushless 2s nano with trex 150 board. used AEO 3.2 gr motor for tail. I think motor is too fast for the tail. May need to rewind to lower the kv. Make it aroung 7000-8000kv. It is more than 10k now.
It flies really well. It is around 47gr now. Need to make ligher board mount. One i made is 1.4gr. Thinking to use balsa to make ultra light mount. It may not be strong enough. But if I don't crash, it should work. |
Thread Tools | |
Display Modes | |
|
|