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Old 12-18-2018, 10:54 PM   #1
Dlab
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Default Alltrax SR500 issue

Every couple weeks I notice the cart seems to be lacking full power, so I plug in the toolbox and sure enough it only reads 80% full throttle. So I clear the cad and all is well for a while.... but it always reverts back to this sooner or later?

Any suggestions? Quite frustrating when you know what it should do, it doesn’t, then you have to plug it in and clear it to get 100% throttle every few weeks....
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Old 12-18-2018, 11:13 PM   #2
WalterM6
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Default Re: Alltrax SR500 issue

Use the Absolute throttle settings.
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Old 12-19-2018, 11:03 AM   #3
Sergio
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Default Re: Alltrax SR500 issue

Fix the throttle linkage that is preventing the MCOR from consistently reaching the 100% pedal travel.

On a DS cart you can use a piece of fuel hose or a zip tie under the worn out piece under the accelerator pedal.
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Old 12-20-2018, 03:49 PM   #4
Dlab
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Default Re: Alltrax SR500 issue

This was formally a resistor cart, don’t believe I have an mcor?

How do I pull up the absolute throttle? I don’t see that in the tool box? It always reverts to 80% throttle untill I clear it, then it’s fine and back to 100%
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Old 12-20-2018, 07:41 PM   #5
WalterM6
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Default Re: Alltrax SR500 issue

If you don't have a MCOR what throttle are you programming it for? Anyway the answer to setting up a "Absolute Throttle" is too long to answer here. I'm attaching a copy of the software manual. Start at chapter 9 and you should be OK
Attached Files
File Type: pdf Doc113-002-E_XCT-SRX-Toolkit-Manual-1.pdf (1.64 MB, 0 views)
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Old 12-21-2018, 08:13 AM   #6
Dlab
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Default Re: Alltrax SR500 issue

Thanks for the pdf Walter, I can get it figured out after browsing through it. Oh and I have pot box throttle that comes with Scotty bs conversion kit
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Old 12-21-2018, 08:24 AM   #7
scottyb
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Default Re: Alltrax SR500 issue

That pot box is 0-5000 Ω. Test the actual output.
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Old 12-21-2018, 08:39 AM   #8
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Default Re: Alltrax SR500 issue

Make sure you're achieving as close to 5000 ohms as possible with the pedal pressed and make sure it's a linear resistance curve when going to fully pressed. i.e. no jumpy or lagging spots during movement of the pot arm. It should be very consistent.
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Old 12-21-2018, 09:24 AM   #9
scottyb
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Default Re: Alltrax SR500 issue

The output is fully adjustable if you are careful. Anything below 200 is good for "0" and anything above 4600 is okay for "5000"
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Old 12-21-2018, 09:45 AM   #10
Sergio
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Default Re: Alltrax SR500 issue

Keep in mind that 'Absolute Throttle Setting" = "Fixed Throttle Setting".

What this means is that if Your throttle was reaching 100% when you ran the absolute throttle calibration, it will still fail the same way next time it only reaches a 80% signal.

The only way that is possibly going to help You is if You happen to be sending a 80% signal when you run the 'Absolute throttle" calibration as it will ignore future values above that setting.

I will also add that no cart using an Alltrax controller should use a resistor to reduce the reverse speed, you should only use the "reverse" speed terminal provided on the Controller.

Alltrax has never published the exact algorithm used for the auto-calibration, and while the low setting is pretty easy (the throttle value at the time the pedal micro-switch closes), the high value is not so easy to determine.

I am guessing is based on the median of the highest sampling after "x" number of KSI cycles, so keeping the throttle signal consistent would help in case a lot of reverse driving takes place.

Last edited by Sergio; 12-21-2018 at 10:01 AM.. Reason: Note about reduced reverse speed.
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