echo series Product manual
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3.1.7 Buzzer
The car mounted buzzer is used for device alarms and special function reminders, and can
be automatically or manually activated. Based on the beeping situation, chassis issues can be
quickly identified, as shown in the table below.
Function
Cycle
Step1
Step2
Step3
Startup
Disposable
2KHz/100ms
3KHz/100ms
4KHz/100ms
Low battery reminder
5s
4KHz/100ms
2KHz/100ms
Low battery error
1s
4KHz/100ms
2KHz/100ms
Manual/special functions
2s
2KHz/100ms
4KHz/100ms
System error
2s
4KHz/100ms
number of cycles
note
Silent until the end of the cycle
Note: The number of system error single cycle beeps corresponds to the order of the byte
where the error code is located, such as 4 beeps when the drive is disconnected.
3.1.8 Line offset
The straight-line deviation of the chassis is influenced by many factors, and is generally
controlled within a deviation of 50cm within 10m. If the deviation is too large, the following
measures can be taken:
1) Check if the ground is level, potholes and slopes can cause deviations
2) Check if the tire cover is normal, severe wear and foreign objects can cause diameter
changes.
3) Is the speed too fast or the acceleration and deceleration too large during the test?
Please test at a low and constant speed.
4) Is there any uneven load, which can lead to varying degrees of shock absorption
compression, and the load test can be removed.
3.1.9 Wired control steps
If using CAN to control the chassis, the following steps or commands are required.
1） Wait for the chassis to start and sound the start buzzer before proceeding to the next
step.
2） Ensure that the remote control is turned off or switched to CAN mode.
3） Enabling device (general setting instruction).
4） Switch to CAN mode (chassis status setting command).
5） Start motion (chassis motion control command).
If using ROS/Serial port to control the chassis, In addition to the above operations, it is also
necessary to connect the device first.
1） Correctly connect the chassis to the CAN-COM HUB, please refer to Figure 3.2 (Example
of HUB connection).
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