R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 08-02-2007, 11:06 AM   #16
Tech Elite
 
Join Date: Dec 2002
Location: Florida
Posts: 3,922
Trader Rating: 3 (100%+)
Default

The orginal bonded magnets looked different from the new EX version.I took one apart last weekend and the new bonded have brass sleeves and look like gray plastic. I had my orginals but can't find them presently.We changed the rotor and endbell to the Sinstered rotor. My protype motor is still working fine.
__________________
Team Epic/Trinity -Michael Bruce Hobbies-Team CRC ,Kimbrough Products and GForce.
WGT-R, GT-12 Racing USA (21.5 ), Formula 1 and Home Track is 386 RaceWay,ROAR #7540.
BullFrog is offline   Reply With Quote
Old 08-02-2007, 04:16 PM   #17
Tech Lord
 
syndr0me's Avatar
 
Join Date: Dec 2004
Location: 5280 Raceway
Posts: 13,140
Trader Rating: 32 (100%+)
Default

Quote:
Originally Posted by BullFrog View Post
The orginal bonded magnets looked different from the new EX version.I took one apart last weekend and the new bonded have brass sleeves and look like gray plastic. I had my orginals but can't find them presently.We changed the rotor and endbell to the Sinstered rotor. My protype motor is still working fine.
The brass sleeves and grey magnets sound like the very original SS bonded rotor that came in the 4300 and 5800. The darker colored rotors were released as an "updated" rotor for the 4300 and 5800 that required a new endbell, and were a darker colored material. The rotors that came in the faster motors released later were also a darker material, but had some kind of wrap on them, presumably to hold them together under high RPM?

So, in summary, I've seen three different bonded rotors:
1. SS - Grey magnet, smaller bearing
2. Updated - Black magnet, larger bearing
3. Velociti Bonded - Black magnet, larger bearing, wrapped in material

Maybe one of the Novak guys can clear things up?

Also, UN4, are you talking about the circuit board that the Hall sensors and temperature sensor are mounted on that's down in the can? Was it green in earlier motors and orange later?
syndr0me is offline   Reply With Quote
Old 08-02-2007, 04:21 PM   #18
Tech Lord
 
syndr0me's Avatar
 
Join Date: Dec 2004
Location: 5280 Raceway
Posts: 13,140
Trader Rating: 32 (100%+)
Default

Novak Bonded Rotors:

1. http://www2.towerhobbies.com/cgi-bin...?&I=LXJXS2&P=7 (SS)
2. http://www2.towerhobbies.com/cgi-bin...?&I=LXNKW0&P=7 (SS Oversized Bearing)
3. http://www2.towerhobbies.com/cgi-bin...?&I=LXMYK0&P=7 (Velociti)
syndr0me is offline   Reply With Quote
Old 08-02-2007, 05:29 PM   #19
Tech Fanatic
 
Nexus Racing's Avatar
R/C Tech Elite Subscriber
 
Join Date: May 2005
Posts: 848
Default

So which bearing comes in the EX series...large or small?
__________________
NEXUSRACING.com
Nexus Racing is offline   Reply With Quote
Old 08-02-2007, 05:34 PM   #20
Super Moderator
 
Marcos.J's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2003
Location: Semper Fi
Posts: 27,213
Trader Rating: 182 (100%+)
Default

Quote:
Originally Posted by Nexus Racing View Post
So which bearing comes in the EX series...large or small?
small
Marcos.J is offline   Reply With Quote
Old 08-02-2007, 07:29 PM   #21
Tech Lord
 
UN4RACING's Avatar
 
Join Date: Oct 2006
Location: MODIFIED!
Posts: 13,140
Trader Rating: 22 (100%+)
Default

Quote:
Originally Posted by syndr0me View Post

Also, UN4, are you talking about the circuit board that the Hall sensors and temperature sensor are mounted on that's down in the can? Was it green in earlier motors and orange later?
Yeah they were green. And later switched to orange. The green one had 3 little capacitors or diodes not sure what they are.? And the orange one has 4. I thought they had some thing to do with sensing the timing.?
You have to put them side by side to see. But the green one had more Rpm than any of my orange ones. Smoke, Jaz, or henbeave bought it. I'm not sure who got which one.

Thats what I thought he may want is the green one. (Sensor)

They were 4300. But the 1st 13.5's had them to.
UN4RACING is offline   Reply With Quote
Old 08-03-2007, 12:42 AM   #22
Tech Lord
 
syndr0me's Avatar
 
Join Date: Dec 2004
Location: 5280 Raceway
Posts: 13,140
Trader Rating: 32 (100%+)
Default

The Hall Effect sensors are how the ESC know the position of the rotor. You can read up on them to learn more, it's a pretty neat deal. Having a sensor to tell you the exact position of the rotor seems to lead to a much smoother response than trying to rely on back EMF like the sensorless guys do. I believe that's what you're seeing mounted to that board, along with perhaps a temperature sensor? I can't imagine the color of the PCB would make a difference, but it may correspond to some kind of change made in the motors at the same time that affected speed?

What rotor did the 13.5 come with originally? I know the first 30 or so shipped with the SS rotor (and smaller bearing) but didn't the rest have the larger bearing? If so, presumably, they ran with the updated bonded rotor, right? So maybe the EX actually is different, if that's the case.
syndr0me is offline   Reply With Quote
Old 08-03-2007, 04:46 AM   #23
Tech Elite
 
Join Date: Dec 2002
Location: Florida
Posts: 3,922
Trader Rating: 3 (100%+)
Default

Only one problem with the grey and darker material theory. I have the protytpe 13.5 motor. Actually I got two of the orginals(the test models) they they both had the darker brown material magnets.The replacement magnets that I got from Novak was the same dark brown material.The only other 13.5 I've seen was last weekend the new EX and it had a grey magnet- which we changed out to the new endbell and sinstered rotor.
__________________
Team Epic/Trinity -Michael Bruce Hobbies-Team CRC ,Kimbrough Products and GForce.
WGT-R, GT-12 Racing USA (21.5 ), Formula 1 and Home Track is 386 RaceWay,ROAR #7540.
BullFrog is offline   Reply With Quote
Old 08-03-2007, 05:30 AM   #24
Tech Lord
 
UN4RACING's Avatar
 
Join Date: Oct 2006
Location: MODIFIED!
Posts: 13,140
Trader Rating: 22 (100%+)
Default

Quote:
Originally Posted by syndr0me View Post
The Hall Effect sensors are how the ESC know the position of the rotor. You can read up on them to learn more, it's a pretty neat deal. Having a sensor to tell you the exact position of the rotor seems to lead to a much smoother response than trying to rely on back EMF like the sensorless guys do. I believe that's what you're seeing mounted to that board, along with perhaps a temperature sensor? I can't imagine the color of the PCB would make a difference, but it may correspond to some kind of change made in the motors at the same time that affected speed?

What rotor did the 13.5 come with originally? I know the first 30 or so shipped with the SS rotor (and smaller bearing) but didn't the rest have the larger bearing? If so, presumably, they ran with the updated bonded rotor, right? So maybe the EX actually is different, if that's the case.
Well I'm not sure what they changed.? But its definitely different. And if it effected rotor position that would explain how they are so smooth on the bottom end take off. I have my set so tight on the dead band all you have to do is slightly touch the trigger and it will respond.
They are visibly different. (Green from Orange).
UN4RACING is offline   Reply With Quote
Old 08-03-2007, 10:47 AM   #25
Tech Elite
 
edseb's Avatar
 
Join Date: Jan 2004
Location: Laguna Niguel, California
Posts: 2,421
Default

I have an older bonded one sitting around. PM if interested
edseb is offline   Reply With Quote
Old 08-03-2007, 01:16 PM   #26
Tech Adept
 
chris72983's Avatar
 
Join Date: Mar 2007
Location: Meridian, Mississippi
Posts: 146
Trader Rating: 3 (100%+)
Default

I have a older bonded rotor motor, with about 5 runs on it. If you would like, buy me a new ss motor, and I'll trade you.
__________________
[COLOR="Magenta"][FONT="Arial"]Schumacher Mi3[/FONT][/COLOR]
[FONT="Arial"][COLOR="Lime"]Jammin X1CR[/COLOR][/FONT]
[COLOR="black"][COLOR="Red"]North Hills Hobbies (601-696-9767) Meridian, MS[/COLOR][/COLOR]
chris72983 is offline   Reply With Quote
Old 08-03-2007, 01:51 PM   #27
Super Moderator
 
Grizzbob's Avatar
 
Join Date: Feb 2002
Location: Sand Springs, OK
Posts: 3,063
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by padailey View Post
Lets remember guys that there are two bonded rotors... the original used with the smaller bearing and the upgrade rotor/end bell with the larger bearing. However the original SS13.5 came with the upgraded rotor/end bell so just make sure you get an upgrade rotor if you go the route of swapping out the sintered.
Correct, there are 2 sizes of bonded rotor, the original & one that fits the bigger bearing endbells today(that one is Novak part number 5907, I believe). Because we've been requiring the bonded rotors alot in my area, I had to make sure I could get replacements too(since my 13.5 is the newer type, except it doesn't have the ribbed can, but otherwise came the same as the 13.5 Pro, so I had to find rotors to fit it). Also, if you're talking about rotors going bad(when someone earlier mentioned EX's going out), all you need do is make sure it doesn't get too hot, & something I've been doing for that is using Novak's heat sink for them & using some freezing spray(you can get that at Radio Shack & electronics shops), just spray the heat sink(& ONLY the heat sink) right before you run & it'll keep the motor & rotor cool enough long enough to make it through a race, & it seems to keep the rotor from going bad too soon, also.....
__________________
Bob Seay
Tamiya TRF417, TA05v.2, TRF211XM, M-05ver.2R, XRAY X12, Associated B5m Factory Lite

Go Pokes!!!
Grizzbob is offline   Reply With Quote
Old 08-03-2007, 02:20 PM   #28
Tech Lord
 
UN4RACING's Avatar
 
Join Date: Oct 2006
Location: MODIFIED!
Posts: 13,140
Trader Rating: 22 (100%+)
Default

Novak needs to make a 13.5 out of the plastic can like the one that comes with the RTR XXX-T truck.
Its light weight. I have one but its a 4300 bonded.

If Syndrome would just tell Novak to make one we may see one.
UN4RACING is offline   Reply With Quote
Old 08-03-2007, 07:47 PM   #29
Tech Apprentice
 
Join Date: Jun 2007
Location: America
Posts: 79
Default

The EX sport is what you are looking for...........it does have the rotor you are looking for and will be legal for your club racing.

No further answers required at this time.
outrunner25 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Novak Gtb (old style) or xrb TeamFast Radio and Electronics 0 06-25-2008 08:12 PM
Novak 13.5 (New style) convikt R/C Items: For Sale/Trade 5 01-06-2008 09:28 AM
4300 Novak Brushless Motor/ New style w/sintered rotor Carbonman R/C Items: For Sale/Trade 6 04-15-2007 04:33 PM
FS: Novak Cyclone - Old Yellow Label Style Scott S R/C Items: For Sale/Trade 3 10-13-2005 09:14 PM
Wanted: GM or Novak Race style Speed controls Cain R/C Items: Wanted to Buy 2 05-28-2004 05:24 AM



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 07:11 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