IowaNav
09-13-2020, 03:55 PM
Hi all,
I've been working on an amphibious vehicle model to be used for research at my University. The thing is more robot than RC boat at this point, but many of my parts have been sourced from OSE. I've got a number of questions I'll be putting on the forum over the next few days, as we've been having some issues with crosstalk between servos, surging of our waterjet drive motor, etc. For now, I'd like to focus on the drive-wheel controllers.
I've got two ZTW Seal 150A ESCs driving two rear wheels via gearboxes. Both share identical programming, receive identical PWM inputs, and are connected to identical motors. However, one of the ESCs will occasionally (about one time in five) start up rotating in the wrong direction. For example, given a slow forward throttle command, the port side wheel will rotate forward at a slow speed. The starboard side wheel will rotate backward for about 1 second, stop, and then begin rotating forward.
It will also occasionally "blip" into reverse when a constant forward throttle position is being commanded.
I've switched motors, switch ESC throttle leads, swapped phases on the motor leads, etc. The behavior always tracks that particular ESC.
Anything else I can try? Or should I just keep badgering ZTW for a warranty replacement?
I've been working on an amphibious vehicle model to be used for research at my University. The thing is more robot than RC boat at this point, but many of my parts have been sourced from OSE. I've got a number of questions I'll be putting on the forum over the next few days, as we've been having some issues with crosstalk between servos, surging of our waterjet drive motor, etc. For now, I'd like to focus on the drive-wheel controllers.
I've got two ZTW Seal 150A ESCs driving two rear wheels via gearboxes. Both share identical programming, receive identical PWM inputs, and are connected to identical motors. However, one of the ESCs will occasionally (about one time in five) start up rotating in the wrong direction. For example, given a slow forward throttle command, the port side wheel will rotate forward at a slow speed. The starboard side wheel will rotate backward for about 1 second, stop, and then begin rotating forward.
It will also occasionally "blip" into reverse when a constant forward throttle position is being commanded.
I've switched motors, switch ESC throttle leads, swapped phases on the motor leads, etc. The behavior always tracks that particular ESC.
Anything else I can try? Or should I just keep badgering ZTW for a warranty replacement?