Brushless combo help!!!

[timgrimes]

Hi, I have just got my car that I won on eBay I have just switched it on to run it up, and when I use the accelarater it goes backwards, also when using the transmiter there is no feel in the accelaration no build up of speed just as soon as I touch it it's off really harsh. It's a losi xcelorin brushless combo.

If anyone has any advise on how to sort it I'd be greatful

[Reuben]

Hi Tim.

Sounds like you need to set the end points again, usually done by holding the "Set" button down as you turn the ESC on (the little orange one next to the power switch). I cant remember off the top of my head what order it is for the Losi, but try holding the set as you turn it on (with transmitter turned on).

then press the orange button once after letting go.

then hold full throttle (the wheels should not spin at this point) and press the orange button.

then hold full brake and press orange button.

turn off and turn it on again.

Did you get the Losi instructions with it?

[timgrimes]

Thanks I'll give that a go.

No didn't come with intructions

[timgrimes]

Just given that ago no luck

[martinchallis]

Tim,

What model speedo do you have? you can often find a pdf version of the manual online.. if not im sure someone will be able to help you trackside.,,

[yellowshark]

Tim, re going backwards, you probably have a reverse setting on the trannie, if so change it and that should do it

[yellowshark]

Btw, posted that from my new tablet. Boy is this abunch of fun and the rain is great, I am making great progress

[Dave Chamberlain]

Wot you get Pete???

Just picked up BB 32Gb Playbook very nice!

[yellowshark]

Sony S 16gb wifi Dave. I did not need 3g as I just “tether” it to my smart phone and use the data allowance on that. I had a 16gb SDHC card so I didn’t need 32gb – so for £299 well pleased.

Of course I have done nothing over the past 4 days apart from play with it. ;D

The remote control app is awesome, far better/configurable that I thought it might be (my 4 remote controls are now hidden away). The software keyboard is fantastic.

A fair number of the included Sony apps are irritating or useless but I have replaced them with stuff I was using on the ‘phone anyway

Yesterday afternoon I discovered and spent the rest of the day playing with Evernote. This must just be the greatest application since the spread-sheet first came on the Mac some 30 years ago.

I just need to find a way of porting my custom built race countdown timer to the Android platform and I will be in heaven

[Dave Chamberlain]

Sounds like you need to have a chat with Mr Findley who has a android developer account and has written a few apps..

I'm sure he would be able to help out with porting your timer..

[Jazzler]

Possibly if I could find the time. I've been wondering if I could use one of those new raspberry pi`s to make my own lap counter. If so the possibility to link it to a phone via Bluetooth, wifi etc should be quite feasible. Needs more thought and planning though.

Porting is not really my thing.. I like to design and make from scratch. But then I'm only a hobbiest developer.. so could take a long time, and may never happen.

What's the software currently do pete??

[yellowshark]

It has 2 screens; the first maintains a few parameters and the second is the timer.
The maintenance screen let's you input

• Race start time
  
• Number of minutes you have the additive on for before putting on the tyre warmers
  
• Number of minutes in the tyre warmers
  
• Number of minutes you need for fitting the wheels (this can of course be set to 0 if you do not take the wheels off – I do to rotate the tyres)
  
• Number of minutes for final heating (i.e. I take the tyres out of the heaters wipe them “dry” and then I put the tyre heaters back once I have fitted the wheels) – again this can be set to 0 if desired.
  
• Number of minutes you want the car ready before the race starts – this would probably be 2 minutes but it be three or one and a half
  
  

There are some additional static allowances in the code – e.g. 1 or 2 minutes for applying the additive (cannot recall off hand which figure I used.)

Of course apart from the race start time, the other parameters once set would rarely be changed.
I also need to update it for additives which are a two stage process.

The timer page shows the race start time and the count-down to race start and actual time.

Then for each step - applying additive, warming tyres, fitting wheels, final tyre warming

it shows the start time and countdown to start time. When the countdown for one of these goes under 5 mins, the timer changes from green to red. Release 2 will allow you assign a rock tune of your choice to this event

There is no slack time here, all start times are latest start times. You can of course kid the timing and put some slack time in by saying I want the car ready e.g. 5 mins before the start.

In many ways it is quite simple but it was a b*gger to code because it is difficult doing date/time arithmetic in Windows because it stores time as a fraction of a day – so you cannot just take one time instance from another to get the time difference – everything has to be manipulated first to get it into hours/mins/secs. And if you want to calculate mins then 13:10:00 is greater than 12:55:00 but you have to work that out for yourself.

Once I get a couple of hours to work on it again I am going to parameterise the step names and add a couple of more steps in to make it more flexible. At the moment this aspect is hard coded to suit my process

I would certainly pay £1.99 for a droid copy ;D

[Jazzler]

Hmm. Well it sounds straight forward enough. If I get a some time I might give it a go. Although in the mean time it sounds like something you could use a spreadsheet and a stopwatch for the most part. I can't imagine it becoming a best seller in the Android market ;-) but as a hobbiest developer its not really about that for me.

I can't promise I'll have time to do it, or in any timescales, but if a get a day or so I might give it a crack.

[ianlloyd]

Not sure how all this is helping Tim?

[Mike V]

Ha ha, I was thinking that Ian. Tim, I'll see if I can find the manual for a Losi setup, if not bring it trackside and one of us will sort it

[Jazzler]

Okay okay... back to topic.

A quick Google search found me the Losi manual here : losi.com/ProdInfo/Files/losb9535.pdf

And a quick flick through brought me two potential matches to fix this.


The first:

Setup / Calibration to Transmitter (Page 10)
To perform the setup/calibration between the ESC and Transmitter follow these
steps:
1. Turn on the transmitter.

2. While turning on the vehicle Press and Hold the setup button, notice the
Green LED is now ON solid. When the Green LED is on solid, you can release
the setup button.

Note: If you cannot get the ESC to Calibrate, you may need to reverse your
Throttle Servo on the transmitter.

3. Using the throttle trigger pull Full Throttle until the Green LED will flash then
the Blue LED will turn ON solid.

4. Next push the throttle trigger to Full Brake until the Blue will flash and the
Green and Blue LED’s are both ON solid. (With the blue LED on, the green led
may appear to be yellow)

5. Now return the throttle trigger to the Neutral position and the Blue and
green LED’s will flash and then come ON solid.

6. Turn off the vehicle/ESC power switch.

7. Turn the vehicle/ESC back ON; you are now ready to use the
ESC.


And the second:

If the motor you are using runs backwards after installation, you can correct
this in one of two ways:
• Disconnect any two motor wires, switching the position on the motor and
re-connecting.
• Using the ESC Software, you can select the Reverse Rotation feature.

[Jazzler]

Oh, and on page 7 it suggests there is an acceleration profile. Which can be changed using the programming card (Described in the guide). Did you get a programming card with it?

It might be set to a high setting, which I assume can just be turned down using this card?