Curtis Controller Programming

mjroman20 · 08-16-2019, 11:27 AM

Quote:

Originally Posted by jayp1017

It is most likely not a fake. Curtis markings lazered on all components ect ect ect. Is it possible when the guy before me changed speed sensor he needed to recalibrate the controller or something?

There's not really any calibration needed unless the magnet pole number is changed. I wouldn't suggest touching the 15V to the Ground wire though... the output regulator could be damaged that way. Speed sensors operate as an open collector. Think of it as an NPN transistor or N-channel FET where the passing magnetic pole acts as the Base/Gate. The 15V is to power the hall effect. Its equivalent operation is connecting and disconnecting the wire you measured as 5V to ground. The 5V is a pull up from a resistor, the control is reading the time between switching as an RPM. If its pulsing the motor armature and doesnt see any speed sensor pulses it will reduce the speed by setting a fixed field current and armature PWM% (with Curtis its usually around 20% with 10A field) which on stock vehicles results in approx 4mph.

jayp1017 · 08-16-2019, 11:44 AM

Well I do not understand what your saying really but I'm sure I dont know how to fix it! So frustrated!

mjroman20 · 08-16-2019, 01:04 PM

Did you try measuring the wire that is at 5V when its plugged into the motor? (black lead on B-, red lead on 5V wire) then if you push the cart by hand *slowly* it should switch between 0 and 5. If you do so quickly it'll likely read 2.5V. Check out the manuals in the link I posted, the diagram should show you which wire is which.

jayp1017 · 08-16-2019, 01:13 PM

I just did. Its reads roughly 4.5v and does not change if I spin the back wheels.

jayp1017 · 08-16-2019, 05:17 PM

took a magnet with speed sensor connected...went around the sensor with magnet and it did speed up. So do I have a bad magnet or???

jayp1017 · 08-16-2019, 08:16 PM

UPDATE:

FIXED!

Turns out the magnet for one reason or another was recessed too far into the motor housing so it wasnt strong enough to pickup the speed sensor. I put a washer behind the magnet to make it closer to the sensor. Runs fine now!

kgsc · 08-16-2019, 09:31 PM

Excellent!!

08-16-2019, 11:44 AM	#12
jayp1017 Getting Wild Join Date: Nov 2016 Location: Kalamazoo Michigan Posts: 132	Re: Curtis Controller Programming Well I do not understand what your saying really but I'm sure I dont know how to fix it! So frustrated!

08-16-2019, 01:04 PM	#13
mjroman20 Gone Wild Join Date: Apr 2015 Location: Pennsylvania Posts: 378	Re: Curtis Controller Programming Did you try measuring the wire that is at 5V when its plugged into the motor? (black lead on B-, red lead on 5V wire) then if you push the cart by hand slowly it should switch between 0 and 5. If you do so quickly it'll likely read 2.5V. Check out the manuals in the link I posted, the diagram should show you which wire is which.

08-16-2019, 01:13 PM	#14
jayp1017 Getting Wild Join Date: Nov 2016 Location: Kalamazoo Michigan Posts: 132	Re: Curtis Controller Programming I just did. Its reads roughly 4.5v and does not change if I spin the back wheels.

08-16-2019, 05:17 PM	#15
jayp1017 Getting Wild Join Date: Nov 2016 Location: Kalamazoo Michigan Posts: 132	Re: Curtis Controller Programming took a magnet with speed sensor connected...went around the sensor with magnet and it did speed up. So do I have a bad magnet or???

08-16-2019, 08:16 PM	#16
jayp1017 Getting Wild Join Date: Nov 2016 Location: Kalamazoo Michigan Posts: 132	Re: Curtis Controller Programming UPDATE: FIXED! Turns out the magnet for one reason or another was recessed too far into the motor housing so it wasnt strong enough to pickup the speed sensor. I put a washer behind the magnet to make it closer to the sensor. Runs fine now!

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08-16-2019, 09:31 PM	#17
kgsc Gone Wild Join Date: Dec 2009 Location: Aiken, SC Posts: 13,141	Re: Curtis Controller Programming Excellent!!

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