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!