Little spinner 4 upgrades

[graeme]

Re: Little spinner 4 upgrades

New speedo fitted, trying a castle ice2 160HV, going to test it tommorow and try the data logger on it.
Its a bit heavier than the scorpion so will have to loose some weight somehow.

[Mouldy]

Re: Little spinner 4 upgrades

I should copyright my ideas from you guys lol.....

Post a pic of the data from a spin up

[sam_smith]

Re: Little spinner 4 upgrades

Those new parts are looking good Graeme, espicially the weapon gearbox, looks very robust.
The Triacs are awesome little machines!

Out of curiosity, why did you choose to include a bevel gear set in the design?

[graeme]

Re: Little spinner 4 upgrades

Thanks sam yours is looking great too, I used the bevel gear because the motor wont fit in on its end
theres only 65mm height inside the robot.
1st spinup data below if you click on it it gets clearer. I couldnt spin it up any faster as the base would spin round on the garage floor. I dont have a steel sheet for the magnets to hold it down and i probably didnt need a 160A
controller.[attachment=0:k316amhx]Spinup data.jpg[/attachment:k316amhx]

[Mouldy]

Re: Little spinner 4 upgrades

As if your current draw Is that low.... 360s getting re geared.

[typhoon_driver]

Re: Little spinner 4 upgrades

That's running off 10 cell isn't it? So the current draw will be a lower than the same setup on 5 or 6 cell if i'm right in thinking?

[PJ-27]

Re: Little spinner 4 upgrades

That you are. Plus I'm assuming a spin up that slow wouldn't draw too much current.

[typhoon_driver]

Re: Little spinner 4 upgrades

So Dave I would recommend doing a few spin up tests and seeing what the current draw on your own machine is before changing out ratios etc

[Mouldy]

Re: Little spinner 4 upgrades

210amp ...I know why my current draw is high/ls4's is so low... Was just shocked at how low ls4s draw is... Even on a slow spin up.

[graeme]

Re: Little spinner 4 upgrades

I have screwed the base down to stop it spinning but still cant spin up any faster, the motor is going out of sync for some reason if i throttle up quickly and it screams. What settings do you use on your esc dave ?.

[PJ-27]

Re: Little spinner 4 upgrades

Don't tell em Dave! We don't need ls4 to get more powerful.

[grant_ploughbot]

Re: Little spinner 4 upgrades

Quite a good reading on that chart, although I'm quite suprised your getting issues starting up any faster without higher current spikes. Implies it's more of a timing issue than loading.
I'll have a look on a few forum's and see what I can find regarding timing for you.

[Mouldy]

Re: Little spinner 4 upgrades

I did some reading up on it a year or so ago, and remember finding out that scorpion motors like a high timming mode best.... i fiddled with the setting for a while doing spin ups, analysis then moding the software then spinnups again etc... i think it needs to be customised to the robot to get the best performance... i havent bothered with 540, i just left the settings the same as 360... but fiddling around with it did make a massive difference on 360.

my settings;

Throttle tab in software;
vehicle type- airplane
throttle type- auto calibrate end points
throttle response- medium (you could probably get away with turning urse up- but 360 span up best set to medium)
rest of that page should be greyed out.

Brake tab in softare;
0% dissabled (obvious reasons lol)

cut offs tab;
cutoff voltage - auto lipo 4v per cell
current limiting - 300a (urse will be different as its a 160 - basicaly i set it the stage below insensative... as that setting had a tendancy to set the esc on fire
cut off type - hard cut off

Motor tab (the important one);
motor start power - high (100)
motor timing- high (10)
direction - forward (upto you)
PWM rate -out runner mode

other tab;
power on beep - enabled (i like it)
BEC voltage-5V

logging tab;
every seccond- and i log everything

[graeme]

Re: Little spinner 4 upgrades

Ok thanks for that will test more at the weekend, I had timing set to low(5) and motor start power at medium(59) so that may be why.

[sam_smith]

Re: Little spinner 4 upgrades

Thanks Graeme.
Thats exactly the same reason I've kept the bevel set in NST.