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Old 05-09-2024, 10:51 AM   #1
marmour
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Question Royal EV - Cart shudders when slowing down without brakes

Not sure if this is the right forum but it's the closest one I could find.

I have an electric golf cart from a brand called "Royal EV." I am pretty sure they are just a cart from a bunch of parts from China they are white labeling. Anyway, the issue I have is that when you are driving the cart and you take your foot off the accelerator, the cart starts to slow down as I would expect but once you get around ~5 miles per hour or so the brakes engage pretty hard and the whole cart shutters to a stop. This is jarring, of course, and the only way that prevents it is to lightly ride the brakes anytime you are not using the accelerator.

I assume this is not normal... does anyone have any advice for something to look for to adjust/check?

Thanks for your help!
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Old 05-14-2024, 05:28 AM   #2
TheCartBoy
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Default Re: Royal EV - Cart shudders when slowing down without brakes

Unless the EM brake or speed sensor is damaged, that's some bad tuning in the motor controller. It's clearly setting the park brake prematurely.
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Old 05-14-2024, 06:13 AM   #3
marmour
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Default Re: Royal EV - Cart shudders when slowing down without brakes

Thanks for the input!

I guess I can poke around and see if I can figure out where the speed sensor is to check it. I am guessing adjusting the controller will be more complex than a setting that I can simply access. I don't see any configuration on the screen on the cart that would impact that.
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Old 05-14-2024, 06:23 AM   #4
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Default Re: Royal EV - Cart shudders when slowing down without brakes

No idea what motor controller they use, but generally it needs a proprietary programming cable and software for tuning.
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Old 05-14-2024, 09:09 PM   #5
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Default Re: Royal EV - Cart shudders when slowing down without brakes

If you have a 1266 controller, the manual says something about this issue
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