START HERE |
|
Register | FAQ | PM | Events | Groups | Blogs | Calendar | Mark Forums Read |
Unregistered
|
Jeti Duplex Radio Systems Jeti Duplex Radio Systems Support |
|
LinkBack | Thread Tools | Display Modes |
04-27-2016, 03:36 PM | #1 (permalink) |
Registered Users
Join Date: Jul 2006
|
Clear Min/Max values
Hi.
When spooling up, my UniSens E detects some crazy high RPM. How do I clear min/max values on a switch, preferably a sequenze started by amp draw? |
Sponsored Links | |||
Advertisement |
|
04-28-2016, 03:23 AM | #3 (permalink) |
Registered Users
Join Date: Oct 2015
|
Maybe the Unisens detects the pwm-switching as rotation signals. I can observe this in my T-Rex 250 too. When Spooling up there is first a raise in RPM, then it Drops and raises again. And no, there is no rpm drop in real.
regards Wolfgang
__________________
Walkera 4G6 2S Flybarless µBrain Align T-Rex 250 SE Flybarless Microbeast Oxy 3 Spirit Pro |
04-28-2016, 02:41 PM | #4 (permalink) |
Registered Users
Thread Starter
Join Date: Jul 2006
|
Exactly same issue here, T-rex 250, RPM raising, lowering, raising, settling.
Could try switching sensor lead connection, just can't see why it should fix the problem. |
04-29-2016, 02:18 AM | #5 (permalink) |
Registered Users
Join Date: Oct 2015
|
I can't see, why switching the sensor connection should fix it too!
I think, the pwm frequency comes in the same range as the field changing frequencies could be in. In my opinion ist a missinterpretation, but i could live with this, because in flight the rpm data is correct. Compared to helitach app there is a only neglectable difference. best regards Wolfgang
__________________
Walkera 4G6 2S Flybarless µBrain Align T-Rex 250 SE Flybarless Microbeast Oxy 3 Spirit Pro |
04-29-2016, 04:03 AM | #6 (permalink) | ||
Registered Users
Join Date: Feb 2011
|
Quote:
Quote:
Neither can I, but it fixed it for me when I had this issue with a Unisens. |
||
04-29-2016, 05:07 AM | #7 (permalink) |
Registered Users
Join Date: Apr 2012
|
Logic says that something "flows" differently in the different wires, otherwise you could not change the motor direction by swapping two wires...
__________________
Oxy 2 ♦ X-Vert ♦ Warp 360 ♦ Blade 450X ♦ Blade 450X Nightflyer ♦ Goblin 500 ♦ 2 X mCPX v2 ♦ night fly mQX ♦ LadyMQX ♦ nano QX ♦ nano QX FPV ♦ Inductrix ♦ DX8 G1 |
04-29-2016, 05:41 AM | #8 (permalink) |
Registered Users
Join Date: Oct 2015
|
@Coco66:
Thas just the signal timing between the wires 1 - 2 - 3 - 1 - 2 - 3 or 1 - 3 - 2 - 1 - 3 - 2 So swapping two of the three wires changes the direction. But when you only watch one wire, you only see on/off (or maybe +/0/-). The time between two "on/+"-Events is interpreted as on field change. So number of field changes per second divided by the number of poles gives the rpm. This is the same on all wires at the same rotation speed only detected at a slightly different time. But in the spin up the esc reduces the effective voltage or current using pcm. Maybe it starts always with the same wire and this influences the rpm measurement by the Unisens. I have this double ramp up in telemetry with both of my helicopters. So I think, ist not dependend of the wire (or ist simply by random the same wire I took).
__________________
Walkera 4G6 2S Flybarless µBrain Align T-Rex 250 SE Flybarless Microbeast Oxy 3 Spirit Pro |
04-29-2016, 06:37 AM | #9 (permalink) |
Registered Users
Join Date: Apr 2012
|
I actually now remember I used to have that problem with the Spektrum sensor, never experienced it after moving to the Hyperion sensors (on three helis).
__________________
Oxy 2 ♦ X-Vert ♦ Warp 360 ♦ Blade 450X ♦ Blade 450X Nightflyer ♦ Goblin 500 ♦ 2 X mCPX v2 ♦ night fly mQX ♦ LadyMQX ♦ nano QX ♦ nano QX FPV ♦ Inductrix ♦ DX8 G1 |
04-29-2016, 07:48 AM | #10 (permalink) | |
Registered Users
Join Date: Feb 2011
|
Quote:
I haven't seen them in stock for a couple of years now. |
|
05-04-2016, 11:33 AM | #11 (permalink) |
Registered Users
|
FWIW, the hobbywing rpm sensors are better. I know some escs (Castle, maybe others) pulse the motor in a way that confuses the Hyperion sensor.
__________________
Jeti DS14us -- TT e700 -- 6s Logo600se UL -- Logo600-3d -- Logo500 UL -- Charge Case |
05-04-2016, 01:02 PM | #12 (permalink) | |
Registered Users
Join Date: Feb 2011
|
Quote:
The hobby wing uses two, and I believe I had a spektrum sensor a long time ago that also used two. |
|
Thread Tools | |
Display Modes | |
|
|