Philtek
1 mW
- Joined
- Mar 22, 2015
- Messages
- 17
Hello ES!
I have an Erider bottom bracket that is outputting inconsistent torque voltages. Perhaps one of you have seen similar issues and can comment.
Issue: Voltage output from torque sensor stops modulating during riding. This usually occurs within a 5-10 minutes of riding. Power cycling the system resets the sensor and it works normally again.
Observations:
36 pole Erider, 48 volt system, CA V3(tried a few FW same result), Phaserunner, All Axle STD wind (same condition observed with GMAC).
Confirmed 11.56v at Erider.
Confirmed the CA V3 is reading the voltage correctly: I thought the CA firmware might have a bug but I have confirmed the torque voltage output from the Erider at some point stops modulating and sits at 1.56 volts no matter how hard I crank the pedals. I used a multimeter on the handlebars while riding and confirmed the flatlining of output voltage from the Erider at 1.56 volts when the issue appears. Only way to resolve is to power cycle the system which immediately resolves the issue.
Tried swapping out the Erider sensor shell with a second unit: I am still observing the same behavior even with a second Erider sensor shell in the same installation. I only swapped the sensor shell (left side sensor cup) , not the entire shaft or right side cup. I’ve swapped the sensor wiring as well as I originally suspects a simple wiring issue.
Seems to occur most often after heavy pedaling, or shifting under load: When the issue appears, I stop and observe the torque voltage the CA is reading in the setup menu. Most of the time when the issue crops up the sensor will sit at 1.56 volts no matter how hard I crank. Sometimes it modulates only slightly while really cranking on the pedals and other times not at all. A power cycle resets it completely and normal operation returns every time so I suspect an issue with the IC in the sensor itself. Maybe an out of range reading on the sensor is causing the sensor to crash or recalibrate to a much higher load threshold.
I have read that the Erider can be susceptible to EMF noise. Has anyone come across of a condition as I’m describing being caused by EMF noise? Is there a common installation fault (too tight cups or lock ring) that could has caused issues with the sensor? I have tried moving the sensor wiring away from any other cables or the frame but the issue has persisted. My next move will be installing a small cap on the 12v-gnd at the pas JST and seeing if that helps.
Thanks in advance.
I have an Erider bottom bracket that is outputting inconsistent torque voltages. Perhaps one of you have seen similar issues and can comment.
Issue: Voltage output from torque sensor stops modulating during riding. This usually occurs within a 5-10 minutes of riding. Power cycling the system resets the sensor and it works normally again.
Observations:
36 pole Erider, 48 volt system, CA V3(tried a few FW same result), Phaserunner, All Axle STD wind (same condition observed with GMAC).
Confirmed 11.56v at Erider.
Confirmed the CA V3 is reading the voltage correctly: I thought the CA firmware might have a bug but I have confirmed the torque voltage output from the Erider at some point stops modulating and sits at 1.56 volts no matter how hard I crank the pedals. I used a multimeter on the handlebars while riding and confirmed the flatlining of output voltage from the Erider at 1.56 volts when the issue appears. Only way to resolve is to power cycle the system which immediately resolves the issue.
Tried swapping out the Erider sensor shell with a second unit: I am still observing the same behavior even with a second Erider sensor shell in the same installation. I only swapped the sensor shell (left side sensor cup) , not the entire shaft or right side cup. I’ve swapped the sensor wiring as well as I originally suspects a simple wiring issue.
Seems to occur most often after heavy pedaling, or shifting under load: When the issue appears, I stop and observe the torque voltage the CA is reading in the setup menu. Most of the time when the issue crops up the sensor will sit at 1.56 volts no matter how hard I crank. Sometimes it modulates only slightly while really cranking on the pedals and other times not at all. A power cycle resets it completely and normal operation returns every time so I suspect an issue with the IC in the sensor itself. Maybe an out of range reading on the sensor is causing the sensor to crash or recalibrate to a much higher load threshold.
I have read that the Erider can be susceptible to EMF noise. Has anyone come across of a condition as I’m describing being caused by EMF noise? Is there a common installation fault (too tight cups or lock ring) that could has caused issues with the sensor? I have tried moving the sensor wiring away from any other cables or the frame but the issue has persisted. My next move will be installing a small cap on the 12v-gnd at the pas JST and seeing if that helps.
Thanks in advance.