Xcelorin Sensored Speedo Problems Help needed

[tiny tom]

Out racing and my speedo was playing up with not been able to get the power down, it was cutting out and not getting full power. And it stopped dead 2 times in a final, and then started again after a few seconds.
Now someone else had the same problem with 2 of his speedos and he was having the same problem as me. But my car was working the week before, now 2 cars having the same problem on the same day?
Has anyone else had the same problem? Needed help

[henga]

I had this today in my final. It seemed ok then the power dropped off
to about 30% then was ok again few seconds later. This happened a
few times and I eventually gave up and retired from the race. I thought
it might be voltage cut out (it was the second race with the same 4900 Lipo) but when this has happened before the car just stopped abruptly, so this seems to be something different. After the race I put a fresh battery in and it seemed ok, but I will have to do some more testing to see if I can get this to happen again.

[tyreman]

Plug the speedo into your pc/laptop and have a proper look at the settings, make sure you have 0%throttle limit and 20-30% brake, also make sure you have got the reverse throttle limit set to 100%.
Have you updated the firmware from the Losi website (foc).

Try the above, if you are still having problems drop me a pm and we can try some other setting.

Have you both had this problem with lipo's onlt, or has it worked ok with normal cells?? What lipo voltage cutoff have you set, is it set to 2 or 3 cells, as if it is set to 3 cells the cutoff is preset to 9v, whereas 2 cells are set to 6v.

Hope that helps.

[B4 Sloth]

Initial Acceleration - Use this to limit the initial power that is sent to the motor when starting from a complete stop.

Using the LOW option, the vehicle will launch very slowly and provide the longest run times. When using the HIGH choice, you will have wheel-spinning acceleration at the cost of run time. This is also very tough on the batteries as the amperage draw can be very high. If your vehicle cuts out, hesitates or loses radio control, you should consider setting this at a lower value.


v Low
Using this option will provide longer run times and is easiest on the batteries. Good choice for beginners.

v Medium
Medium requires more from your batteries, and is good for low traction surfaces.

v High
This option will provide full acceleration and requires stout batteries to supply the load required in this setting.


CAUTION: You may experience what seems like the motor cutting off, a hesitation or possible brief radio loss using this setting.

Taken out of the manual. I had exactly the same problem. Once set up on the pc it was fine. You dont lose top end...must be a fail safe. Try with no load on the road, all would be fine..add grass and stop!!!

[henga]

Just had a look at my settings

Lipo - 2 cells 6v (that's correct)
Brake/reverse - Forward w/o reverse
Throttle Limit - 20% ????? (I set the throttle limit on the programming card to 80% so I don't know why it says 20% on my computer)
Reverse Throttle Limit - 100%
Motor Timing - Normal
Initial Acceleration - High
Braking Percent - 30% ????? (20% on card)
Percent Drag Brake - 15% ?????(20% on card)
Legacy or 2.4GHz - Legacy (I have 2.4GHz radio)
Neutral Deadband - 3

It looks like the programming card hasn't sent all of the correct settings?
The firmware needed updating as well. I'll change all of the things that are obviously wrong and see if it makes a difference.

Alex

[tyreman]

Why would you want to restrict your throttle?? set it to 0%
try this setup
Throttle Limit %0
Rvs throttle limit %100
Motor Timing Normal
Initial acceleration Medium
Braking %30
Drag brake %30
Neutral deadband 3

[i4n]

If it helps my card never actually program's the speedo correctly, I just end up taking my laptop everywhere now!

[henga]

Originally Posted by tyreman

Why would you want to restrict your throttle?? set it to 0%

It's a 4.5 turn motor and I found it way too fast at full throttle.
80% seems about right. I'll defiantly try the other setting though.
Thanks.

[henga]

Originally Posted by i4n

If it helps my card never actually program's the speedo correctly, I just end up taking my laptop everywhere now!

Yes, that's probably the way to go.

[Darren Boyle]

Guys, regarding the setting cards! We have found that although Losi tell you to just wait for the ESC LED and the card red LED to come one, this itself is not enough, wait for at least 30 seconds or so after for the programming to "fully" exchange between ESC and Card. We tried to change an ESC to have reverse for a basher and plugged all in, waited for all the LEDs to iluminate but nothing. When we left it 30 seconds it worked.

I have now tried this on several setting changes to see if "time" was all we needed to add and it has now proved to be, since this method has worked on over 10 ESC's.

Try it for yoursleves with somthing simple like turning on reverse (easiest thing to check it has uploaded!) and then just switch it back once you have proved this is your "upload" problem. If you change back to forward only try just quickly try waiting for LED's only and I would bet that it doesnt work, leave it plugged in on the second try for 30 seconds and you should have success.

HTH

[Team No Idea]

I had the same problems but in different ways.......
First i gave my mate a Xelorin sensorless combo (brand new) to try at the west kent meeting today.... and it glitched like a bugger!. We tried loads to get it working but it was having none of it.

So not to be outdone i had a 2nd Losi setup in my B4 with me. This was the Xelorin sensored type linked to a novak 6.5 light. Now i used this car all day last sunday and at the coventry finals with no problem at all and all i did was swap it to his xx4. But this system also glitched like mad! We re-programmed / reset it to his sanwa trasmitter at the trackside but to no avail. The car was cutting out all over the place.
So tonight ive put it back in my B4 and again reset it to my KO trasmitter and its 100% tickety boo perfect....strange.....

[tiny tom]

Well I think I might of been the inital acceleration?
Setup
Lipo cut off: 6.2v
Throttle limit: none
Reverse throttle limit: 100%
Motor Timing: Normal
Initial Acceleration: High
Bracking: 80%
Drag Brack: 30%
Legacy
Neutral Deadband:3

I have dropped the bracking down to 30%, dropped the initial acceleration down to medium which I think might have sorted the problem sorted I hope

[MHeadling]

Im having a few problems with my xcelerin speedo, i had it in my 501 and it was wroking fine, iv swithed it over to my B4 and the motor runs backwards? i have re set the speedo, changed the reverse on the tranny (sanwa) and it makes no difference?

I have loaded the software, so good so far, but when i plug the USB adaptor to the ESC it see's it and the light goes green on the PC screen but comes up with 'Read Error 113!' any ideas whats up??

[MHeadling]

Iv got it to see the speedo now (both green lights on screen) and iv changed the reverse rotation setting and press the 'send settings' button and it comes up with 'Send Error 3!' bloody computers!

Any help would be much appreciated!

[tiny tom]

Well got a new speedo today because I had blew something on the inside, don't know what has happened. But should be up and running for the weekend.

[Robfo]

Check the speedo end of the usb thingy (technical i know!) mine gave me some error messages then fell to bits. i had to re solder the output that goes into the receiver plug and it worked fine after that. Also make sure you have the latest update on your speedo, they don't like it if they are out of date..........

[MHeadling]

I have got a replacment speedo as mine would not recieve data from the PC, anyway just put my new speedo in and things seem to be ok but every now and again the motor stalls ( makes a screecthing noise ), from low rpm and gets a bit hot?

Im using a 4 * lrp vector motor i had in my motor box, any ideas what setting I could change to overcome this?

I used this motor with losi speedo in my 501 with no problems?

[Darren Boyle]

Mark, that is the noise and symptoms they show if the sensor lead is not in correct or loose, try that mate...

[MHeadling]

Hi Darren, tried the sensor lead, tried 2 x new ones in it and 2 x motors and it still coggs? im getting fed up with it! my lrp nosram are great just plug them in and they work! just getting frustrated with it now, and its my second one!

[MHeadling]

Iv spoken to Horizon ( who were very good on the phone ) and I have sent my speedo off to them for a look over to see whats up, maybe 3rd time lucky with it!