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Unread 11-11-2018, 07:16 AM   #11
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Default Re: alltrax programming: throttle, torque and speed curves

At 3000 rpm the cart does 17.1mph according to the speed calculator forward. 75% for reverse would mean the kids get 13mph in reverse... That's too much. Even if the throttle rate is 12.5% so it'll take a while to get there.

I will increase the reverse speed and see if that helps. 75% would mean the kids get 13mph in reverse so I'll try a setting in between.

Does anybody have suggestions as to the speed/torque curve and throttle linearization that may help the lurchiness of the cart when in user 2 mode? Maybe as simple as reducing the throttle response rate or should I look at changing the curves instead?

I understand that if I change the curves to something more gentle I may need to increase the throttle response rate for Normal mode or User 1, that's OK too.
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Unread 11-11-2018, 09:47 AM   #12
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Default Re: alltrax programming: throttle, torque and speed curves

I uploaded my latest throttle map this morning, it is reflected on my post #3.

I like the speed curve flatter and smooth in the middle and steeper at higher speeds to get that torque feel.

Any throttle rate above 40% feels a little neck jerking to me.

For the kids mode change the throttle rate to 25%-30% and the drive style to "Turf" so the controller tries to prevent quick accelerations.

Also increase your plug brake to 250-300 amps, that setting controls how much power the controller will apply when you take your foot off the brake and the cart starts rolling backwards while you press the accelerator to go forward.
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Unread 11-11-2018, 03:08 PM   #13
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Default Re: alltrax programming: throttle, torque and speed curves

I am obviously not understanding what the instructions to the controller are saying. Sergio has one of these controllers (I do not) and he speaks from experience!!

(In other words.....don't listen to me!!)
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Unread 11-12-2018, 06:29 AM   #14
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Default Re: alltrax programming: throttle, torque and speed curves

I've been giving some thought to this "issue" and here is probably what I can't reconcile.

#1--If you set the "Speed" limit to 12.5% and the cart moves forward at a reasonable rate for you kids...that's good.

#2--However, by setting the forward speed to 12.5% that in turn reduces your reverse speed to a crawl.....then

#3--Why if you would increase the reverse speed from 50% to 75% (for example) would the reverse speed NOT be limited to 75% of your now set forward speed of 12.5%?

It doesn't make sense that by only reducing the forward speed to 12.5% it "only" effects the forward speed, when clearly it also effects the reverse speed.

Just asking.......
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Unread 11-12-2018, 07:42 AM   #15
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Default Re: alltrax programming: throttle, torque and speed curves

DaveTM, the 12.5% setting is throttle rate not speed.

That setting controls how fast the Controller reacts to change in output power and speed as a result of a throttle change.

Alltrax does not publish the actual timing involved, but the lower the percentage the longer it takes for the Controller to change output based on the change requested by the pedal and throttle curves.

That throttle rate settings applies towards the entire throttle range.

The "Turf" mode tries to prevent the tires from spinning in slippery surfaces like grass so it appears to be a more pronounced effect at slow speeds and should allow you to set a slightly higher throttle rate.
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Unread 11-12-2018, 07:57 AM   #16
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Default Re: alltrax programming: throttle, torque and speed curves

Sergio,

So, if Bronsonj wants the reverse speed to be faster than his current settings of 1-Throttle Rate @ 12.5%, 2-Speed Limit 3,000(rpm), 3-Max Reverse Motor speed 30%,.....Then he should consider making the Max Reverse Motor speed higher than the current 30% number that he is currently using?

In other words, with all other settings remaining the same, then increasing the Max Reverse Motor speed up to some given number....say 70%.....this will limit the reverse speed to 70% of the current Speed Limit setting of 3,000rpm?


BTW....I'm not advocating his changing to 70%. I'm believe he will arrive at his setting of "likness" via trial and error.

Dave
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Unread 11-12-2018, 08:19 AM   #17
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Default Re: alltrax programming: throttle, torque and speed curves

Ah, I see the confusion Dave. I am wanting to increase the acceleration in reverse, not the top speed. I should have been clearer from the beginning.

Sergio, I'll set the kid mode and mommy mode to turf and the throttle rate on both to 30%. That should be helpful. If that doesn't work I'll play with the speed curve a bit and see how that goes.
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Unread 11-12-2018, 08:24 AM   #18
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Default Re: alltrax programming: throttle, torque and speed curves

If You have a chance try the speed curve I posted, You really need most of the throttle resolution at low speed, huge increases when You are already at higher speeds are not very noticeable.
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Unread 11-12-2018, 08:54 AM   #19
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Default Re: alltrax programming: throttle, torque and speed curves

The thinking is there......but it's the terminology...along with clarity that seems to "need assistance."
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Unread 11-12-2018, 12:53 PM   #20
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Default Re: alltrax programming: throttle, torque and speed curves

Thanks Sergio, I'll give it a go.
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