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FAULT_CODE_UNDER_VOLTAGE

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alexantosh
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Posts: 24
FAULT_CODE_UNDER_VOLTAGE

Hello, connected my brushless 3500 velineon motor of the traxxas ultimate, to VESC tool 3.0. During motor detection, the wheels attempt to spin but can not turn, they only budge a bit.

battery: 3S, 5200 mAH 25C. The motor configuration am using can be found here. Thanks.

 

Below are the faults from the terminal, for the first and last entries. What could be the problem here.

The following faults were registered since start:

Fault            : FAULT_CODE_UNDER_VOLTAGE
Motor            : 1
Current          : -18.5
Current filtered : -14.8
Voltage          : 7.94
Duty             : -0.482
RPM              : -53.3
Tacho            : -21
Cycles running   : 1549
TIM duty         : -8100
TIM val samp     : 4200
TIM current samp : 4200
TIM top          : 16800
Comm step        : 0
Temperature      : 24.58
 
Fault            : FAULT_CODE_UNDER_VOLTAGE
Motor            : 1
Current          : -15.9
Current filtered : -14.6
Voltage          : 8.00
Duty             : -0.544
RPM              : -49.5
Tacho            : -27
Cycles running   : 3459
TIM duty         : -4571
TIM val samp     : 4200
TIM current samp : 4200
TIM top          : 8400
Comm step        : 0
Temperature      : 24.78

The following faults were registered since start:

Fault            : FAULT_CODE_UNDER_VOLTAGE
Motor            : 1
Current          : -2.2
Current filtered : -3.9
Voltage          : 7.97
Duty             : -0.548
RPM              : -1.0
Tacho            : -15
Cycles running   : 10983
TIM duty         : -4604
TIM val samp     : 4200
TIM current samp : 4200
TIM top          : 8400
Comm step        : 0
Temperature      : 25.45

The following faults were registered since start:

Fault            : FAULT_CODE_UNDER_VOLTAGE
Motor            : 1
Current          : -2.2
Current filtered : -3.9
Voltage          : 7.97
Duty             : -0.548
RPM              : -1.0
Tacho            : -15
Cycles running   : 10983
TIM duty         : -4604
TIM val samp     : 4200
TIM current samp : 4200
TIM top          : 8400
Comm step        : 0
Temperature      : 25.45

 

skyline1970
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Joined: 2017-09-07 22:28
Posts: 204

for an 3s battery, vbat_min should not be less than 9V,

charge bat. to full and try again, but at least 4s min recomended, in fact.

alexantosh
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hello skyline, I did what you suggested but even if the voltage improves, the issue persists. Why is my current so low? Below is the current print out from the  terminal:

Fault : FAULT_CODE_UNDER_VOLTAGE

Motor : 1

Current : -17.3

Current filtered : -13.1

Voltage : 8.99

Duty : -0.277

RPM : 38.1

Tacho : -21

Cycles running : 2211

TIM duty : -2327

TIM val samp : 4200

TIM current samp : 4200

TIM top : 8400

Comm step : 0

Temperature : 25.17

skyline1970
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Joined: 2017-09-07 22:28
Posts: 204

in motor settings, general, adjust bat voltage cutoff settings

advanced , min. input voltage

maybe, it could also be tested with an 12v accu.

type of vesc?

alexantosh
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Joined: 2021-04-05 18:05
Posts: 24

Hello skyline, I am using a VESC6 based FSESC6.6. apparently it is using the 60FW, the one without a Mark. alright, I am going to try to set the minimum input battery cutoff voltage to 9v. I did not understand the 12v accu.

On a different note, I wish to recompile the firmware with the servo set as output, is the board i selected below the right one for the with FW:5.2, HW:60? the one without Mark version?

Thanks Skyline1970.

 

skyline1970
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Posts: 204

12v ups or car battery

servo output can be provided

alexantosh
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Posts: 24

thanks alooot. worked. now my motor is spinning happily xd. how can i obtain the servoout?

How do i go about that?

skyline1970
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Posts: 204

in app. settings, "Enable servo output on PPM-port when PPM-app is disabled." make true

alexantosh
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Joined: 2021-04-05 18:05
Posts: 24

Hello, I do not see any such option in any settings. Even when i choose ppm as the app to use from the general tab. Even under the ppm settings and configurations there is no such option as: "Enable servo output on PPM-port when PPM-app is disabled." . Am using FW: 5.2, HW:60, VESC tool 3.0.