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-   Brushless (https://www.rc-monster.com/forum/forumdisplay.php?f=12)
-   -   Dual Plettenbergs(close-ups)..BL emaxx in CRACK! (https://www.rc-monster.com/forum/showthread.php?t=10987)

bdebde 04.02.2008 10:51 AM
LVC = low voltage cut-off, to protect the lipo batts from over discharge.

JERRY2KONE 04.02.2008 11:35 AM
Lvc
 
Quote:
Originally Posted by plettenbergs (Post 159910)
does it mount "in line" on the truck?
LVC :rules: stands for "Low Voltage Cutoff" Refering to a circuit/switch that cuts off the ESC when your voltage level drops to a specified point (usually 3v), so that your batteries do not continue discharging and drop below that parameter. If your Lipos voltage drops too low they can become unstable and damage may occure. Fire, explosion, etc etc ...... I believe the point that someone is trying to make with you is that your ESC may not come equipt with an LVC already. You may need a seperate LVC to accomplish this task in order to protect your equipment.:lol: Please correct me if I am wrong guys???? Good luck with that.:intello:

plettenbergs 04.08.2008 08:36 PM
Good News!
 
i snapped off the front and then the rear portions of my transmission output shaft last week...i installed the new on today...the old one was stock traxxas aluminum....FYI>>>>the new ones from TRAXXASS are "steel" ,it should hold up better!....i still have not decided to make the switch to LIPO yet...i have 8-10 matched packs that i cant give up!....if these new shafts dont hold up i might switch to SHAVE some poundage!(literally)....some have suggested that i take off one PLETT...no way,that would be like removing a turbo charger because there was too much power!...VIDEO SOON!

GriffinRU 04.11.2008 11:48 AM
Quote:
Originally Posted by plettenbergs (Post 161716)
i snapped off the front and then the rear portions of my transmission output shaft last week...i installed the new on today...the old one was stock traxxas aluminum....FYI>>>>the new ones from TRAXXASS are "steel" ,it should hold up better!....i still have not decided to make the switch to LIPO yet...i have 8-10 matched packs that i cant give up!....if these new shafts dont hold up i might switch to SHAVE some poundage!(literally)....some have suggested that i take off one PLETT...no way,that would be like removing a turbo charger because there was too much power!...VIDEO SOON!
Aluminum shaft was stupid idea by traxxas at least, you can twist it with your bare hands :diablo:
As for dual pletts, they are cool looking and great motors, but if I were you I would connect them together (with strong magnetic friction (pole cogging...) it would be very simple to match them) and run from single MGM ESC.

Peter Zicha 04.11.2008 12:15 PM
Quote:
Originally Posted by GriffinRU (Post 162449)
Aluminum shaft was stupid idea by traxxas at least, you can twist it with your bare hands :diablo:
As for dual pletts, they are cool looking and great motors, but if I were you I would connect them together (with strong magnetic friction (pole cogging...) it would be very simple to match them) and run from single MGM ESC.

GriffinRU.....Have you ever done that successfully and made it work , running two brushless motors of one ESC given that the ESC has to sence where the rotor is.......:whistle:

aqwut 04.11.2008 12:23 PM
Quote:
Originally Posted by GriffinRU (Post 162449)
but if I were you I would connect them together (with strong magnetic friction (pole cogging...) it would be very simple to match them) and run from single MGM ESC.

That was just a joke right?.. or is it really possible... :surprised::lol:

sensorless doesn't keep track of here the rotor is, correct?..

Peter Zicha 04.11.2008 12:35 PM
Even sensorless get feed back on rotor position

Arct1k 04.11.2008 12:45 PM
But yes I believe this can and has been done - Get the rotors in sync and locked with gearing it can work

Peter Zicha 04.11.2008 01:52 PM
Quote:
Originally Posted by Arct1k (Post 162471)
But yes I believe this can and has been done - Get the rotors in sync and locked with gearing it can work
Please video tape it if you try..............:smile:

suicideneil 04.11.2008 02:18 PM
Arthur has explaind the precise procedure in the past, and its alot simpler than you might think:

1. Short 2 wires of each motor with a single 1.2v cell, they will rotate to a certain posistion. (do this with the pinions installed to make life easier later).
2. Wire the motors in parallel, then to the esc.
3. Bolt the motors to the motor mount, and mesh them to the spur; when you rotate one motors shaft, the other should follow automatically due to the mechanical magnetic cogging... thing.
4. With the motors meshed to the spur, you can now treat them as one motor in essence, only they will draw double the amps since they are in parallel. You really do need a good esc and batts for this setup.

GriffinRU 04.11.2008 02:19 PM
Yes, I have done that on many occasions and I can even explain how it works and why.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>
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And nicely matched two plettenbergs would be not a problem for ESC to run in sensoreless mode.

Quote:
That was just a joke right?.. or is it really possible...

Have you seen any of this :yes: in my post?

GriffinRU 04.11.2008 02:30 PM
Quote:
Originally Posted by suicideneil (Post 162502)
Arthur has explaind the precise procedure in the past, and its alot simpler than you might think:

1. Short 2 wires of each motor with a single 1.2v cell, they will rotate to a certain posistion. (do this with the pinions installed to make life easier later).
2. Wire the motors in parallel, then to the esc.
3. Bolt the motors to the motor mount, and mesh them to the spur; when you rotate one motors shaft, the other should follow automatically due to the mechanical magnetic cogging... thing.
4. With the motors meshed to the spur, you can now treat them as one motor in essence, only they will draw double the amps since they are in parallel. You really do need a good esc and batts for this setup.
Its all about timing :yes:

Thank you,

suicideneil 04.11.2008 02:33 PM
I've learnt alot from you dude, and I admire the crazy stuff you can do with electronics.

Peter Zicha 04.11.2008 03:41 PM
Cool.....this was said to not work in other forums , but hey your system does seem make sence . this I would like to see for real just to say that I have

plettenbergs 04.11.2008 11:10 PM
new problems!
 
EMAXX trani was working for almost two full batt runs...input shaft has failed now...trani seems to be fine...have to disassemble again tomorrow...i did pick up heavy duty (traxxas #3993x)new one today at hobby shop today!...I MIGHT HAVE TOO MUCH POWER!...it really hauls as for a while though!...is my 1 esc able to power two motors?


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