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Old 01-26-2004, 03:50 PM   #16
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About all I can relate to to this topic is that in my last race I didn't read: ( I was swapping personal transponders all day with a fellow racer through qualifiers and had no problem till the main-I don't own a personal yet and the guy with the mountable transponders wasn't there to race. Before every qualifier the personal would register and count. Now comes the main and I register so everythings a go well a racer was late to the line(ESC problems) so I turn my car off since my batts in my TX were reaching 9.5V-I turned it off at the starting grid. After that I never read 1 lap but luckily since the main(A) was so clean there wasn't a problem placing my position but that was my best run of the day with the most laps I turned so I was kinda disappointed I didn't get to see my lap times. Did turning off my car after I registered cause me not to be read?
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Old 01-26-2004, 05:01 PM   #17
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I have had problems with my PT and it is servo related. The servo in question is a digital Keil Ps 5001 (Futaba) and when used with a FM reciever causes severe problems with the PT. Switching to an AM reciever or different servo and the problems are gone.
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Old 01-26-2004, 05:34 PM   #18
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Default Re: Personal Transponder issues

Ok. Here is the bottom line. The KO serve will no work with the
LRP Esc! IT DRAWS TO MUCH POWER and causes the transponder to malfunction. KO has no fix for it and will blame
LRP. While AE LRP blames KO. My friend had the same problem and the tech guy from KO (Robert) told him there is nothing he could do to help him, other then for him to but a KO Esc.
Another words like my friend your SCREWED!
KO SHOULD PUT A WARNING ON THERE SERVOS
{WILL NOT WORK WITH LRP ESC!}

Sorry to tell you but the problem is not the PT.
IT'S the KO SERVO.
Richard T

Last edited by thirdplace; 01-26-2004 at 05:48 PM.
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Old 01-26-2004, 05:47 PM   #19
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a friend of mine uses a KO servo (2174), lrp QC, and PT with no issues at all, so i don't think the servo is the problem (unless only digital servos cause the problem)
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Old 01-26-2004, 05:50 PM   #20
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Quote:
Originally posted by Rory
a friend of mine uses a KO servo (2174), lrp QC, and PT with no issues at all, so i don't think the servo is the problem (unless only digital servos cause the problem)
Yes, You got it. Its the DIGITAL servos.
Thank you for pointing that out. I should have stated that.
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Old 01-26-2004, 06:09 PM   #21
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As mentioned above, I'm running the KO 2123 7.2V digital servo with KO 301 receiver and Keyence ESC and had no problem reading laps untill I turned my car off then on after I registered but my personal transponder was mounted up front on my bumper-I don't know what the deal is here. I'm starting to beleive it's in the Jlap program and not our transponders.
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Old 01-26-2004, 06:20 PM   #22
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it is certainly not all digital servos that cause this. it is, perhaps, the combination of esc and servo. apparently, high current demanding servos tax the supply output of the esc, and result in a voltage drop. it's not the fault of either manufacturer. and, it can be resolved without trading either component.

- hardwire the transponser in. (pending it's input voltage rating)
- try a cap.
- use a spare battery to power the pt. maybe a small litium ion watch battery. the pt needs voltage, not current capabilities.
- if your servo is a fet servo, bypass the fet output on the esc, and just hardwire to the +battery post on it.
- if your servo is a std 6.0v, you still have the option to hardwire, and increase the performance of it, at the expense of the servo motor's lifespan.

c'mon dudes, think outside the box.

joneser, can i assume you'll be out on thursday taking care of this?
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Old 01-26-2004, 06:28 PM   #23
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Quote:
Originally posted by proudwinner
As mentioned above, I'm running the KO 2123 7.2V digital servo with KO 301 receiver and Keyence ESC and had no problem reading laps untill I turned my car off then on after I registered but my personal transponder was mounted up front on my bumper-I don't know what the deal is here. I'm starting to beleive it's in the Jlap program and not our transponders.
Yeah see, The problem is only when you mix the digital 6.0v
servos with the LRP Esc.
And KO knows there is a problem. But won't do anything about it!

Last edited by thirdplace; 01-26-2004 at 06:34 PM.
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Old 01-26-2004, 06:46 PM   #24
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Don't take me wrong. I am vary happy with my Ko equipment
I'm running the VFS2000 esc and a POS947fet servo in my Pancar.
and I like it.
Richard T
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Old 01-26-2004, 08:40 PM   #25
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Quote:
Originally posted by thirdplace

And KO knows there is a problem. But won't do anything about it!
Yes, you're right, KO is well aware of the problem and, IMO, they should be warning people. A sticker on the box that says, "Will not work with LRP, Mtronics, Nosram, and similar ESC's and personal transponders" would save everyone a massive headache.

FWIW, I know that Futaba's 6.0v digital servos don't trigger the problem with the LRP ESC's and PT's. In fact, I've only seen the problem with some of KO's servos so it seems to me that the onus is on KO to make the consumer aware.
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Old 01-26-2004, 09:39 PM   #26
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Quote:
Originally posted by thirdplace
Yeah see, The problem is only when you mix the digital 6.0v
servos with the LRP Esc.
And KO knows there is a problem. But won't do anything about it!
Not taking you wrong in any way 3rdplace but I'm still puzzled why I didn't read in my main and I'm running 7.2V KO digital servo and Keyence speedo.
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Old 01-26-2004, 09:59 PM   #27
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Default KO/LRP

I ran a digital KO and a Quantum comp in my 12th scale and I have never had a problem. The servo is probably not drawing as much power.
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Old 01-26-2004, 10:37 PM   #28
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How about just building a small RX pack like in 12-scale? I'm not sure you can blame on company for an electrical anomoly like this. Make sure your endpoints are set so the servo isn't straining and drawing too much current.
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Old 01-26-2004, 10:45 PM   #29
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derekB....I did not blame anyone, I simply asked for information. Servo and radio setups are fine....not to mention its a little hard to put strain on a servo when going down a the back strait. If KO knows about it then they should have some warning on the package. I have a Keyence that I can throw in the car so its not a huge issue for me. I could build a receiver pack but dont care to...not to mention I should not have to. If you read this post, it does not sound like an electrical anomoly....sounds like I am one of a number of people with the problem.
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Old 01-26-2004, 11:07 PM   #30
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Quote:
Originally posted by AlanLim
we had this kind of problem at our track (carpet). the track owner called AMB.....and here is the fix.....
installing the loop wires upder the carpet.....and that's it....
the loop doesn't like the personal xponders to go below it........weird...
Hmmm that's intresting, were you having crashing(Jlap)problems before you all installed the loop under the carpet?
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