VESC- FSESC 75200 ADC1/ADC2 voltage increase issues

A

apprisco

100 mW
Joined
Feb 4, 2021
Messages
35
Whenever either motor is running i'm seeing a huge spike in ADC1/ADC2 voltages, up to 0.4v.
This is a serious spike in voltages meaning it's very hard to actually control anything.
I tried shielding the cable to its own ground connection to no avail. Should I short the chassis to batt- and then ground every shielded cable to the chassis in hopes of reducing EMI?
 
apprisco said:
Whenever either motor is running i'm seeing a huge spike in ADC1/ADC2 voltages, up to 0.4v.
This is a serious spike in voltages meaning it's very hard to actually control anything.
Click to expand...
By ADC1/2, I assume you are referring to throttle & brake signals,

1. Test w/ a potentiometer
2. Increase ramp time (as a side effect noise would reduce), though it can negatively affect quality of riding
 
Last edited:
afzal said:
By ADC1/2, I assume you are referring to throttle & brake signals,

1. Test w/ a potentiometer
2. Increase ramp time (as a side effect noise would reduce), though it can negatively affect quality of riding
Click to expand...
What ramp times are people using? I was using 0.15s positive, maybe this should be higher.
 
apprisco said:
What ramp times are people using? I was using 0.15s positive, maybe this should be higher.
Click to expand...
I think my throttle (adc1) is at 0.30s and haven't noticed any issues. Do you have filtering enabled for the signal as I found that really important to get a smooth pas signal.
 
markglos said:
I think my throttle (adc1) is at 0.30s and haven't noticed any issues. Do you have filtering enabled for the signal as I found that really important to get a smooth pas signal.
Click to expand...
Issue fixed by shielding cables again and hiding them within a metal "conduit" aka outside the chassis to reduce EMI.
 
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