R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 01-30-2006, 10:24 AM   #526
Tech Champion
 
STLNLST's Avatar
 
Join Date: Sep 2001
Location: Sacramento
Posts: 8,991
Trader Rating: 21 (100%+)
Default

Ran the GTX for the first time this weekend and was very happy with the way if felt. Very smooth speedo yet enough punch if I needed it.
__________________
REMEMBER THE GOOD OLE DAYS..........THEY'RE NEVER COMING BACK SO WE'RE STUCK WITH THE MESS IN FRONT OF US!!!!
STLNLST is offline   Reply With Quote
Old 01-30-2006, 11:57 AM   #527
Tech Master
 
Charlie's Avatar
 
Join Date: Aug 2001
Location: I'm All Over The Place
Posts: 1,160
Default

Well, the first time I tried it, I did just what the manual said and it worked. The second time I tried it, it worked as well.

I've bumped into a few guys at the track and done it for them as well. I don't know, some buys get it right away, others don't. We're talking about a difference of 5-10 seconds between the quick tap and the hold procedure.

Sorry I can't be of more help here, maybe get it all setup and give me a call. I'll set one up and we can walk through it.

Schottky Diodes always help. It's technically speaking "best" to have them installed on the motor. A schottky stops the voltage the motor generates ANYTIME it free spins (When ever you let off) from heating up internals of the ESC.

Power Caps are there to help dissipate the "Ripple" current effect generated by the Switching Rates of the ESC. Bigger is generally better.
__________________
Novak Electronics Tech Support
Charlie is offline   Reply With Quote
Old 01-30-2006, 12:05 PM   #528
Tech Champion
 
asw7576's Avatar
 
Join Date: Sep 2004
Posts: 5,792
Default

Charlie : Sorry, quick question..... why my GT7 sparks big time whenever I connect the cable to battery. The spark is pretty loud. Is this normal for all GT7 ? because my GTX doesn't do that.

Oh yeah.... I'm novak loyalist........ , I have 2 GTX, 1 GT7, 1 Cyclone TC, and all the way back to 1995 Novak Duster 2, heheheh
__________________
On Road : Xray NT1 , RX8 , T4 || Mugen Seiki MRX4-R , MTX4 , MTX3 prospec || Tamiya M03 , M04 || Top Racing Sabre FD2
Off Road : Xray XT8 || Hobao Hyper 8
Radio : Futaba 3PKS || KO propo EX-10 eurus
asw7576 is offline   Reply With Quote
Old 01-30-2006, 04:25 PM   #529
Tech Master
 
Charlie's Avatar
 
Join Date: Aug 2001
Location: I'm All Over The Place
Posts: 1,160
Default

The spark is usually the just the cap charging. Most ESCs with power caps will arc slightly when the power is initially connected.

Thanks.
__________________
Novak Electronics Tech Support
Charlie is offline   Reply With Quote
Old 02-05-2006, 01:20 AM   #530
Tech Fanatic
 
finchy's Avatar
 
Join Date: Jan 2003
Location: Australia
Posts: 822
Default

Seems like I've got a problem with my gtx. On initail acceleration, it stutters a few times ( varies from time to time ) then goes to full acceleration. Thought it was the battey pack, but changed pack and it does the same thing as before. I've also checked all the wires, could it be the capacitor that's on the speed controller.

Sorry for all the questions, only very new to electric.
__________________
Inf1nity IF1
OS Speed
KO PRO PO
Runnertime
Hudy
finchy is offline   Reply With Quote
Old 02-05-2006, 02:57 AM   #531
Tech Elite
 
Jack2's Avatar
 
Join Date: Nov 2004
Location: Australia
Posts: 2,377
Trader Rating: 1 (100%+)
Default

Sounds more like a receiver related problem to me.......Check and make sure the receiver is perfectly clean inside and maybe try and different receiver. It may be the ESC but I have my doubts....
__________________
Schumacher Mi4CX
Mugen MTX & MRX

"He who dies with the most toys wins" - Phil Harris
Jack2 is offline   Reply With Quote
Old 02-05-2006, 03:04 AM   #532
Tech Rookie
 
Scapegoat's Avatar
 
Join Date: Feb 2006
Location: Back Shed
Posts: 16
Default

I had similar problem like that in my GT7, Opened tha case up & cleaned/flushed it with contact cleaner, Seems ok now.
Scapegoat is offline   Reply With Quote
Old 02-05-2006, 01:32 PM   #533
Tech Fanatic
 
finchy's Avatar
 
Join Date: Jan 2003
Location: Australia
Posts: 822
Default

thanks for the replies guys. Will try your suggestion.
__________________
Inf1nity IF1
OS Speed
KO PRO PO
Runnertime
Hudy
finchy is offline   Reply With Quote
Old 02-06-2006, 03:54 AM   #534
Tech Initiate
 
Mission Mad MI2's Avatar
 
Join Date: Dec 2005
Location: Melbourne
Posts: 30
Send a message via MSN to Mission Mad MI2
Default GTX

Need Help .I have a GTX and was wandering if any one has struck a problem with there speedy losing performance in the second half of a days racing .At first i thought it was batteries or Motors but it has done the same thing with differant batteries and motors now for about 4 meets .Funny thing is it is ok again the next week until you get half way through the day .Any ideas would be greatly appreciated
Mission Mad MI2 is offline   Reply With Quote
Old 02-06-2006, 04:12 AM   #535
Tech Elite
 
Jack2's Avatar
 
Join Date: Nov 2004
Location: Australia
Posts: 2,377
Trader Rating: 1 (100%+)
Default

That sounds pretty weird. I haven't come across that problem, I have never heard of that happening to anyone else's either. If the performance just dropped off I would suggest checking the solder connections on the power capacitor because if they come lose the ESC will run hot and feel sluggish. But if you say it feels good the next week well I'm not sure what to say.

Maybe if your racing in hot conditions and the ESC isn't getting very good air-flow and your running low turn Mod motors it may be overheating and that may cause it to go off. I run low turn mods all the time and have never overheated my GTX's but they do get good air-flow. I would consider running and Novak or MuchMore 25x25mm fan above the ESC and see if cooling is what it needs. Maybe try running a different profile.

Other than that, try to borrow another ESC, preferably a GTX and see if it has the same symptoms.

Contact Novak, I'm sure they can help or steer you in the right direction.
__________________
Schumacher Mi4CX
Mugen MTX & MRX

"He who dies with the most toys wins" - Phil Harris
Jack2 is offline   Reply With Quote
Old 02-06-2006, 09:48 AM   #536
Tech Champion
 
asw7576's Avatar
 
Join Date: Sep 2004
Posts: 5,792
Default

Got question about GTX MOSFET

From Novak GTX website :

"*Due to the unique nature and advanced technology of the GTX's MOSFETs, the MOSFET manufacturer has changed the current rating from 150 amps to 700 amps and braking current rating from 60 amps to 300 amps."

How do I know I get the latest MOSFET ( 700 amps ) ?
__________________
On Road : Xray NT1 , RX8 , T4 || Mugen Seiki MRX4-R , MTX4 , MTX3 prospec || Tamiya M03 , M04 || Top Racing Sabre FD2
Off Road : Xray XT8 || Hobao Hyper 8
Radio : Futaba 3PKS || KO propo EX-10 eurus
asw7576 is offline   Reply With Quote
Old 02-07-2006, 08:04 PM   #537
Tech Adept
 
zipp's Avatar
 
Join Date: Nov 2005
Posts: 167
Default

Hi guys, got a question

i just got my gtx afew days ago, brand new. used the one-touch programming to set it up to my sanwa super exzes transmitter and after that's done i noticed i was hitting full throttle (indicated by the solid green light) when my transmitter stick was only at half throttle!! everything else was fine, eg solid red light at neutral, flashing green at full brakes.. tried performing the one-touch programme afew more times, but it didn't help.

is this normal?! is it just a matter of changing transmitter settings? (which btw were all reset to default prior to setting up esc)

any help would be greatly appreciated!
zipp is offline   Reply With Quote
Old 02-07-2006, 10:20 PM   #538
Tech Elite
 
Trips's Avatar
 
Join Date: Aug 2001
Location: 360 Speedway
Posts: 2,251
Trader Rating: 16 (100%+)
Default

zipp,

That almost sounds like your transmitter is hitting full throttle at half stick... an easy way to check is to unplug the GTX, then plug a servo into the throttle channel of the receiver and plug a small 4 cell receiver battery in. Check to see if the servo moves throughout the throttle stick stroke, or if it reaches its full movement at half stick like your GTX is doing.

IF the servo stops moving at half stick, your transmitter is likely out of calibration.

D
__________________
MARSHAL!!
Trips is offline   Reply With Quote
Old 02-07-2006, 10:58 PM   #539
Tech Master
R/C Tech Charter Subscriber
 
Join Date: Jan 2002
Location: Margaritaville
Posts: 1,957
Default

Or just reverse the steering servo and the ESC on the receiver plugs and check it that way.
NismoSkyline17 is offline   Reply With Quote
Old 02-08-2006, 12:51 AM   #540
Tech Adept
 
zipp's Avatar
 
Join Date: Nov 2005
Posts: 167
Default

trips, it was exactly like u said, servo stopped moving somewhere around half throttle. i also noticed full brakes moved the servo a tad more than full throttle, so my guess is that the throttle part is like u said, out of calibration.

should i just send it to the LHS or fix it myself?

thanks for the help
zipp is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
J Concepts BJ4WE CHEAP!!! NIP NOVAK 10.5 & Novak 4300 w/Sintered Rotor Zac R R/C Items: For Sale/Trade 15 02-13-2008 06:13 PM
LRP Sphere tc, Novak 13.5pro, Novak 10.5 pro, Novak 13mm rotor theisgroup R/C Items: For Sale/Trade 9 01-08-2008 11:21 AM
JR R1, Novak Smart Tray, Novak GTX, Futaba S9451, Hellfire stock motors, plus more yauipop Australia For Sale/Trade 7 08-27-2007 03:56 AM
For Sale Novak 3.5 brushless motor with Novak Heat sink $60.00 SHIPPED!!! Marcos.J R/C Items: For Sale/Trade 14 06-24-2007 08:29 PM
Rivergate RCD30, Novak Millenium Pros, XXX4G+, XXXTMF, lehner/novak BL Jman-x R/C Items: For Sale/Trade 1 09-14-2005 10:51 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 03:27 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net