Alltrax SR error flag, High Throttle Input Under-range
 

I have an Alltrax SR 48400, HD 200Amp Solenoid, and HD F/R switch setup (ScottyB - Thanks!) running a MOT-A1 on a 2000.5 DS. Non-MCOR
Everything is great however having a small issue with trying to creep the cart from a dead stop (easing in to parking spot, garage, etc) The controller throws the High Throttle Input Under-range flag and shuts down causing a jerk. To avoid guesswork in what part of the programming I need to adjust (if it's a programming issue), can anyone clue me in? I'll try to post my settings.https://uploads.tapatalk-cdn.com/201...e20bb1de11.jpghttps://uploads.tapatalk-cdn.com/201...33f86e8be2.jpg


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Alltrax SR error flag, High Throttle Input Under-range
 

Ok. After further analysis, the jerk does not occur simultaneously with the error flag. So the title may be off a bit or unrelated. However, the jerking happens as I release the pedal to coast the cart into place or trying to ease into acceleration.
Could it be a slipping axle deal? What are the torque specs for the u-bolts? I have a Jake's 6" lift.

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Re: Alltrax SR error flag, High Throttle Input Under-range
 

Your pedal is maxing the speed signal out about 80% of it's travel yet you have the throttle rate down very low. I would make the last box in the throttle chart 100/100 and ditch those dots in the straight part of the red line, they are not needed.
Put it back to more of a bell curve like below.
You can even copy these chart numbers as a start point.

Re: Alltrax SR error flag, High Throttle Input Under-range
 

Thanks ScottyB! Do you have a screenshot of the Speed curve so I can see those numbers as a starting point? Do you have a recommended throttle rate beginning/end? Yeah, mine is set low thinking that was my issue.


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Re: Alltrax SR error flag, High Throttle Input Under-range
 

On the throttle 12.5 is default for SR controls but I find that high and like 9-10.5 and then 1/2 of that in your FN1 adjustment band.

I attached a pic of the curve in the last post? I'll bet you are viewing the forum with your phone...

Re: Alltrax SR error flag, High Throttle Input Under-range
 

Ok, I'll give that a shot. Yep, on my phone...good call.



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Re: Alltrax SR error flag, High Throttle Input Under-range
 

If You still have issues after adjusting the programming, You may have a hardware problem.

If the Multi-Step potentiometer is OFF post #3 before the pedal micro-switch opens, You will get an under-range error.

You can fix that by putting a piece of wire between post #2 and #3.

http://www.buggiesgonewild.com/attac..._resistors.jpg

Re: Alltrax SR error flag, High Throttle Input Under-range
 

Thank you both! I did match ScottyB's speed/torque curves recipe and it certainly improved the overall acceleration, however, the bucking when trying to inch the cart forward/reverse remains. I got side-tracked with Dad duties so I'll have to do Sergio's mod and testing another time and let you know the results.


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Re: Alltrax SR error flag, High Throttle Input Under-range
 

The bucking at low throttle signal is pretty unusual. Since the Alltrax auto calculates your signal it would seem like the signal is inconsistent in that low range.

Re: Alltrax SR error flag, High Throttle Input Under-range
 

The funny thing is the 'buck' happens when I release the pedal.

We'll see if Sergio's analysis does the trick.