R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 11-16-2008, 05:34 PM   #1
Tech Adept
 
Juanchoyo's Avatar
 
Join Date: Mar 2008
Posts: 118
Default 2 Ways to connect....

Hi guys I was wondering if there's any advantage if you plug your motor positive wire like this



From the battery wires, connect the + wire directly to the motor....

Will it work in any speed control... in my case it's TEU101BK from Tamiya....

What do u think?
__________________
FoxRC Hobby Club
http://foxrc.foroactivo.net/

"Mas que un hobby, un estilo de vida. Algo que corre en los circuitos de mis venas"
.....ChOoJuAaAnNnn, Sebastian, Juancho... como quieran XD.... o Sebastian Oviedooo...
Juanchoyo is offline   Reply With Quote
Old 11-16-2008, 05:38 PM   #2
Tech Fanatic
 
trailranger's Avatar
 
Join Date: Feb 2007
Location: Springfield, MO
Posts: 946
Default

From what I understood, the positive wire needs to be a direct connection from the battery to the motor. The ESC only needs a the jumper positive wire to complete the circut for the BEC to operate which powers on the ESC.
__________________
"If everything seems under control, you're just not going fast enough." - Mario Andretti
trailranger is offline   Reply With Quote
Old 11-16-2008, 05:44 PM   #3
Tech Adept
 
Juanchoyo's Avatar
 
Join Date: Mar 2008
Posts: 118
Default

So I can connect it this way... may get a lil lower Resistance...

mmm good to know the ESC only needs the + wire to operate itself.... gonna try it...
__________________
FoxRC Hobby Club
http://foxrc.foroactivo.net/

"Mas que un hobby, un estilo de vida. Algo que corre en los circuitos de mis venas"
.....ChOoJuAaAnNnn, Sebastian, Juancho... como quieran XD.... o Sebastian Oviedooo...
Juanchoyo is offline   Reply With Quote
Old 11-16-2008, 06:01 PM   #4
Tech Elite
 
a_main_attendee's Avatar
 
Join Date: Jan 2008
Location: Colorado, USA, The land of the free and the home of the brave!
Posts: 2,880
Trader Rating: 2 (100%+)
Default

If you take the case off of ANY brushed speed control with four wires the positive of the battery cable will be soldered onto the positive of the motor on the PC board anyway. You will not notice any difference if you do this or not.
__________________
Support your local tracks!--|--e-teamhobbyplex.com--|--corrc.org--|

NNFaN Paints - Add some pride to YOUR ride.
a_main_attendee is offline   Reply With Quote
Old 11-16-2008, 06:15 PM   #5
Tech Elite
 
Trips's Avatar
 
Join Date: Aug 2001
Location: 360 Speedway
Posts: 2,251
Trader Rating: 16 (100%+)
Default

It's a bit hard to tell from that picture, but it looks like there's a wire direct from the plug to the speedo, and another wire jumped off the middle of that going to the motor.

It would be better to have the wire go directly from the plug to the motor positive, then jump off that to the positive terminal of the speedo. That way you don't depend on the solder joint to be perfect to get the most current to the motor. You want to minimize the number of solder joints in the current path from the battery to the motor.
__________________
MARSHAL!!
Trips is offline   Reply With Quote
Old 11-16-2008, 06:20 PM   #6
Tech Adept
 
Juanchoyo's Avatar
 
Join Date: Mar 2008
Posts: 118
Default

So no advantage at all??
__________________
FoxRC Hobby Club
http://foxrc.foroactivo.net/

"Mas que un hobby, un estilo de vida. Algo que corre en los circuitos de mis venas"
.....ChOoJuAaAnNnn, Sebastian, Juancho... como quieran XD.... o Sebastian Oviedooo...
Juanchoyo is offline   Reply With Quote
Old 11-16-2008, 06:34 PM   #7
Tech Elite
 
Trips's Avatar
 
Join Date: Aug 2001
Location: 360 Speedway
Posts: 2,251
Trader Rating: 16 (100%+)
Default

The fewer joints between the positive battery terminal and the motor, the better. The picture you posted shows an extra joint that could be eliminated.
__________________
MARSHAL!!
Trips is offline   Reply With Quote
Old 11-16-2008, 08:55 PM   #8
Tech Elite
 
a_main_attendee's Avatar
 
Join Date: Jan 2008
Location: Colorado, USA, The land of the free and the home of the brave!
Posts: 2,880
Trader Rating: 2 (100%+)
Default

The thing is the fact that there are no more joints if you where to do it one way or the other, budget esc's just have this "joint" inside the case for simplicity. Less pc board can be used with the three wire setup, but there are no advantages.

Think about it like drawing blood from one arm and then injecting it into the other, it will do nothing (theoretically, of course, this is only an example).

Just as if you cut the wires and re soldered them, it isn't doing anything, because they are allready connected within the case.
__________________
Support your local tracks!--|--e-teamhobbyplex.com--|--corrc.org--|

NNFaN Paints - Add some pride to YOUR ride.
a_main_attendee is offline   Reply With Quote
Old 11-16-2008, 11:05 PM   #9
Tech Master
 
TwoTone's Avatar
 
Join Date: Jun 2008
Location: Maryland
Posts: 1,002
Trader Rating: 12 (100%+)
Default

A_main the point Trips is trying to make is have the solid wire- battery to motor.

The run the ESC of the patch wire. The opposite of the way it now
TwoTone is offline   Reply With Quote
Old 11-17-2008, 03:24 AM   #10
Tech Elite
 
sosidge's Avatar
 
Join Date: Dec 2001
Location: Bristol, UK
Posts: 3,865
Default

Quote:
Originally Posted by Juanchoyo View Post
Hi guys I was wondering if there's any advantage if you plug your motor positive wire like this



From the battery wires, connect the + wire directly to the motor....

Will it work in any speed control... in my case it's TEU101BK from Tamiya....

What do u think?
WHOAH HORSEY!

Tamiya 101 is a reversing speed controller - you can only wire forward-only speed controllers with "three wires".

Just leave the wiring as the instructions suggest.
sosidge is offline   Reply With Quote
Old 11-17-2008, 05:33 AM   #11
Tech Elite
 
Trips's Avatar
 
Join Date: Aug 2001
Location: 360 Speedway
Posts: 2,251
Trader Rating: 16 (100%+)
Default

Two tone understood what I was trying to communicate.
__________________
MARSHAL!!
Trips is offline   Reply With Quote
Old 11-17-2008, 06:40 AM   #12
Tech Master
 
TwoTone's Avatar
 
Join Date: Jun 2008
Location: Maryland
Posts: 1,002
Trader Rating: 12 (100%+)
Default

Depending on the car layout, I've wired it with one wire.

Cut out a section of insulation right where the motor is, so it goes battery to motor to ESC.
TwoTone is offline   Reply With Quote
Old 11-17-2008, 06:56 AM   #13
Tech Adept
 
Join Date: Mar 2003
Location: Tallinn, Estonia
Posts: 226
Default

Quote:
Originally Posted by sosidge View Post
WHOAH HORSEY!

Tamiya 101 is a reversing speed controller - you can only wire forward-only speed controllers with "three wires".

Just leave the wiring as the instructions suggest.
Actually, most of the 4-wire reversing speedos work perfectly when wired in 3-wire mode (leaving the positive motor connection open). Of course the reverse will not work (that's the only thing the positive motor wire from ESC provides), but as an extra bonus you'll cut the resistance of the ESC in half, since the positive to the motor is not switched through the FETs any more, but connected directly.
olev is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tekin RS ESC sensored Jeff Cuffs Electric On-Road 23359 10-02-2016 06:57 AM
RC FLIGHT brading Manila Racers 23110 12-24-2015 07:23 PM
R/C Stuff Selling Kenneth Tan Singapore R/C Racers 45728 09-09-2009 08:19 AM
XX-4 WED help me set up my new car.. XXXDad Electric Off-Road 30 07-05-2008 09:25 PM
West Coast Nitro Challenge March 22,23 ROBBIE C Nitro On-Road 205 03-30-2008 06:20 AM
Help servo wires too short civiclized esi Singapore R/C Racers 6 11-08-2007 08:12 PM
HPI vs Associated lee82gx Electric On-Road 23 11-29-2002 09:57 PM



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

Advanced Search

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 12:00 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net