Changes for page LSS Radio Control (PWM)

Last modified by Eric Nantel on 2024/07/12 11:24

From version < 28.1 >
edited by Coleman Benson
on 2019/02/20 09:40
To version < 30.1 >
edited by Coleman Benson
on 2019/02/22 15:37
< >
Change comment: There is no comment for this version

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5 5  
6 6  = RC PWM =
7 7  
8 -RC hobby servo motors have three pins; the black wire is ground (GND), the middle (red) wire is VCC (normally 4.8V to 6V) and the last wire (commonly yellow or white) is the signal wire. The signal wire is meant to receive 5V PWM pulses which are repeated every 20-30 milliseconds. The onboard electronics receive and time these pulses and associate them to angular positions. If no RC pulse is received, the servo goes limp. All RC servos are centered at 1500 microseconds, and 1000 microseconds tends to correspond to -90 degrees, and 2000 microseconds to +90 degrees. Note that by default many handheld RC transmitters only send between 600 to 2400 microseconds (slightly limited range).
8 +RC hobby servo motors have three pins; the black wire is ground (GND), the middle (red) wire is VCC (normally 4.8V to 6V) and the last wire (commonly yellow or white) is the signal wire. The signal wire is meant to receive 5V PWM pulses which are repeated every 20-30 milliseconds. The onboard electronics receive and time these pulses and associate them to angular positions. If no RC pulse is received, the servo goes limp. All RC servos are centered at 1500 microseconds, and 1000 microseconds tends to correspond to -90 degrees, and 2000 microseconds to +90 degrees. Note that by default many handheld RC transmitters only send between 600 to 2400 microseconds (slightly limited range). Pulses which cannot be interpreted by the servo (ex. constant LOW or HIGH) may cause the servo to go limp.
9 9  
10 10  [[image:PWM - 180 RC - Wiki.png||alt="RC PWM - Wiki.png" width="300"]]
11 11  
12 12  = LSS RC Mode =
13 13  
14 -All three Lynxmotion Smart Servo motors can be used with normal hobby remote control (RC) electronics including handheld remote controls and RC servo controllers. Unlike normal RC servo motors however, the Lynxmotion servo's configurations can be changed via programming. There are two methods to change from serial to RC mode: via the [[LSS - Button Menu>>doc:Lynxmotion Smart Servo (LSS).LSS - Button Menu.WebHome||style="background-color: rgb(255, 255, 255);"]] or sending a CRC command (explained on the [[communication protocol>>doc:Lynxmotion Smart Servo (LSS).LSS - Communication Protocol.WebHome]] page). Note: Each mode can have the rotation reversed, but clockwise is standard (equivalent to CW1 or CW-1 commands).
14 +All three Lynxmotion Smart Servo motors can be used with normal hobby remote control (RC) electronics including handheld remote controls and RC servo controllers. Unlike normal RC servo motors however, the Lynxmotion servo's configurations can be changed via programming. There are two methods to change from serial to RC mode: via the [[LSS - Button Menu>>doc:Lynxmotion Smart Servo (LSS).LSS - Button Menu.WebHome||style="background-color: rgb(255, 255, 255);"]] or sending a CRC command (explained on the [[communication protocol>>doc:Lynxmotion Smart Servo (LSS).LSS - Communication Protocol.WebHome]] page). Note: Each mode can have the rotation reversed, but clockwise is standard (equivalent to CW1 or CW-1 commands). The motion controller used in serial mode is not the same as the motion controller use in RC mode. RC mode is intended to add functionality to what would be considered "normal" RC behavior based on PWM input.
15 15  
16 16  == RC 180° mode ==
17 17  
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68 68  It is also possible to setup pass the 360.0° mark like here for a 720° (±360°; CAR7200) total rotation.
69 69  
70 70  [[image:PWM - 720 - Wiki.png||height="361" width="300"]]
71 +
72 +**Important note **
73 +
74 +To revert from RC mode back to serial mode, the [[LSS - Button Menu>>doc:Lynxmotion Smart Servo (LSS).LSS - Button Menu.WebHome]] is required. Should the button be inaccessible (or broken) when the servo is in RC mode and the user needs to change to serial mode, a 5V constant HIGH needs to be sent to the servo's Rx pin (RC PWM pin) with a common GND and wait for over 30 seconds. Normal RC PWM pulses should not exceed 2500 milliseconds. After 30 seconds, the servo will interpret this as a desired mode change and change to serial mode. This has been implemented as a fail safe.
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