RC-Monster Forums  

Go Back   RC-Monster Forums > Support Forums > Brushless

Reply
 
Thread Tools Rate Thread Display Modes
Old
  (#46)
bdebde
That's All Folks!
 
bdebde's Avatar
 
Offline
Posts: 2,359
Join Date: Dec 2006
Location: in a VAN down by the RIVER
04.02.2008, 10:51 AM

LVC = low voltage cut-off, to protect the lipo batts from over discharge.
   
Reply With Quote
Lvc
Old
  (#47)
JERRY2KONE
JERRY2KONE SUPERMAXX
 
JERRY2KONE's Avatar
 
Offline
Posts: 3,452
Join Date: Sep 2006
Location: HAYMARKET VIRGINIA
Lvc - 04.02.2008, 11:35 AM

Quote:
Originally Posted by plettenbergs View Post
does it mount "in line" on the truck?
LVC 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. Please correct me if I am wrong guys???? Good luck with that.
   
Reply With Quote
Good News!
Old
  (#48)
plettenbergs
RC-Monster Carbon Fiber
 
plettenbergs's Avatar
 
Offline
Posts: 399
Join Date: Mar 2008
Location: Alpharetta,Ga
Good News! - 04.08.2008, 08:36 PM

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!
   
Reply With Quote
Old
  (#49)
GriffinRU
RC-Monster Aluminum
 
Offline
Posts: 748
Join Date: Oct 2005
04.11.2008, 11:48 AM

Quote:
Originally Posted by plettenbergs View Post
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
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.
   
Reply With Quote
Old
  (#50)
Peter Zicha
RC-Monster Carbon Fiber
 
Peter Zicha's Avatar
 
Offline
Posts: 50
Join Date: Feb 2008
04.11.2008, 12:15 PM

Quote:
Originally Posted by GriffinRU View Post
Aluminum shaft was stupid idea by traxxas at least, you can twist it with your bare hands
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.......
   
Reply With Quote
Old
  (#51)
aqwut
Brushless Heavy Weight....
 
aqwut's Avatar
 
Offline
Posts: 1,954
Join Date: Sep 2005
Location: Kingsville, Ontario
04.11.2008, 12:23 PM

Quote:
Originally Posted by GriffinRU View Post
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...

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


The Power of BRUSHLESS!!!!!
http://www.geocities.com/aqwut
1HP (electric) = 746 Watts.
Everything is brushless!!
   
Reply With Quote
Old
  (#52)
Peter Zicha
RC-Monster Carbon Fiber
 
Peter Zicha's Avatar
 
Offline
Posts: 50
Join Date: Feb 2008
04.11.2008, 12:35 PM

Even sensorless get feed back on rotor position
   
Reply With Quote
Old
  (#53)
Arct1k
RC-Monster Mod
 
Arct1k's Avatar
 
Offline
Posts: 6,597
Join Date: Apr 2007
Location: NJ
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
   
Reply With Quote
Old
  (#54)
Peter Zicha
RC-Monster Carbon Fiber
 
Peter Zicha's Avatar
 
Offline
Posts: 50
Join Date: Feb 2008
04.11.2008, 01:52 PM

Quote:
Originally Posted by Arct1k View Post
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..............
   
Reply With Quote
Old
  (#55)
suicideneil
Old Skool
 
suicideneil's Avatar
 
Offline
Posts: 7,494
Join Date: Feb 2007
Location: Devon, England
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.
   
Reply With Quote
Old
  (#56)
GriffinRU
RC-Monster Aluminum
 
Offline
Posts: 748
Join Date: Oct 2005
04.11.2008, 02:19 PM

Yes, I have done that on many occasions and I can even explain how it works and why.

There is nothing to capture here...

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 in my post?
   
Reply With Quote
Old
  (#57)
GriffinRU
RC-Monster Aluminum
 
Offline
Posts: 748
Join Date: Oct 2005
04.11.2008, 02:30 PM

Quote:
Originally Posted by suicideneil View Post
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

Thank you,
   
Reply With Quote
Old
  (#58)
suicideneil
Old Skool
 
suicideneil's Avatar
 
Offline
Posts: 7,494
Join Date: Feb 2007
Location: Devon, England
04.11.2008, 02:33 PM

I've learnt alot from you dude, and I admire the crazy stuff you can do with electronics.
   
Reply With Quote
Old
  (#59)
Peter Zicha
RC-Monster Carbon Fiber
 
Peter Zicha's Avatar
 
Offline
Posts: 50
Join Date: Feb 2008
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
   
Reply With Quote
new problems!
Old
  (#60)
plettenbergs
RC-Monster Carbon Fiber
 
plettenbergs's Avatar
 
Offline
Posts: 399
Join Date: Mar 2008
Location: Alpharetta,Ga
new problems! - 04.11.2008, 11:10 PM

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?
   
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump







Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
vBulletin Skin developed by: vBStyles.com