Joint Control

For a serial multi-joint robot, the control of the joint space is to control the variables of each joint so as to make each joint reaches a target position at a certain speed.

Notice: When setting the angle, the values corresponding to different manipulators are different. Refer to the parameter introduction section for more information.

mechArm 270

Single-Joint Control

send_angle(id, degree, speed)

  • Function: to sends a specified single joint motion to a specified angle.
  • Parameters:
    • id: to stand for the joints of a robot arm. represented by numbers 1-6.
    • degree: means the angle of a joint.
    • speed: means the movement speed of the robot arm, ranging from 0 to 100.
  • Return value: 1

set_encoder(joint_id, encoder, speed)

  • Function: to sends a specified single joint motion to a specified potential value.

  • Parameters:

    • joint_id: to stand for the joints of a robot arm. represented by numbers 1-6.
    • encoder:means the potential value of the robot arm, ranging from 0 - 4096.
    • speed: means the movement speed of the robot arm, ranging from 1 to 100.

  • Return value: 1

Multi-Joint Control

get_angles()

  • Function: to get the angels of all joints.

  • Return Value: List: a list of floating point values which represent the angles of all joints

send_angles(degrees, speed)

  • Function: to send all angles to all joints.
  • Parameters:
    • degrees: (List [float]) contains the angles of all joints.the length is 6; The representation method is [20, 20,20, 20, 20, 20]
    • speed: means the movement speed of the robot arm, ranging from 0 to 100.
  • Return value: 1

set_encoders(encoders, sp)

  • Function: Send potential values to all joints of the robotic arm.
  • Parameters:
    • encoder: means the potential of the robot arm, ranging from 0 - 4096, length is 6. The way to represent:[2048, 2048, 2048, 2048, 2048, 2048].
    • sp: means the movement speed of the robot arm, ranging from 0 to 100.
  • Return value: 1

sync_send_angles(degrees, speed, timeout=15)

  • Function: to send an angle synchronously; return when reaching a target point.
  • Parameters:
    • degrees: A list of angle values of each jointList[float].
    • speed: (int) means the movement speed of the robot arm, ranging from 0 to 100.
    • timeout: The default time is 15s.
  • Return value: 1

get_radians()

  • Function: to get the radian of all joints.
  • Return value: list: a list containing radian values of all joints

send_radians(radians, speed)

  • Function: to send radian values to all joints.
  • Parameters:
    • radians: list: a list containing radian values of all joints, ranging from -5 to 5.
  • Return value: 1

Simple Demo

from pymycobot.mecharm270 import MechArm270

import time

# MechArm270 class initialization requires two parameters:
#   The first is the serial port string, such as:
#       linux:  "/dev/ttyUSB0"
#          or "/dev/ttyACM0"
#       windows: "COM3"
#   The second is the baud rate:: 
#       M5 version is:  115200
#
#    Example:
#       mecharm-M5:
#           linux:
#              mc = MechArm270("/dev/ttyUSB0", 115200)
#          or mc = MechArm270("/dev/ttyACM0", 115200)
#           windows:
#              mc = MechArm270("COM3", 115200)
#       mecharm-raspi:
#           mc = MechArm270("/dev/ttyAMA0", 1000000)
#
# Initiate a MechArm270 object
# Create object code here for windows version
mc = MechArm270("COM3", 115200)

# PI version
# mc = MechArm270("/dev/ttyAMA0", 1000000)

#By passing the angle parameter, let each joint of the robotic arm move to the position corresponding to [0, 0, 0, 0, 0, 0]
mc.send_angles([0, 0, 0, 0, 0, 0], 50)

# Set the waiting time to ensure that the robotic arm has reached the specified position
time.sleep(2.5)

# Move joint 1 to the 90 position
mc.send_angle(1, 90, 50)
# Set the waiting time to ensure that the robotic arm has reached the specified position
time.sleep(2)

# The following code can make the robotic arm swing left and right
# set the number of loops
while num > 0:

     # Move joint 2 to the 50 position
    mc.send_angle(2, 50, 50)

    # Set the waiting time to ensure that the robotic arm has reached the specified position
    time.sleep(1.5)

    # Move joint 2 to the -50 position
    mc.send_angle(2, -50, 50)

    # Set the waiting time to ensure that the robotic arm has reached the specified position
    time.sleep(1.5)

    num -= 1

#Make the robotic arm retract. You can manually swing the robotic arm, and then use the get_angles() function to get the coordinate sequence, 
# use this function to let the robotic arm reach the position you want.
mc.send_angles([88.68, -138.51, 155.65, -128.05, -9.93, -15.29], 50)

# Set the waiting time to ensure that the robotic arm has reached the specified position
time.sleep(2.5)

# Let the robotic arm relax, you can manually swing the robotic arm
mc.release_all_servos()

myCobot

Single-Joint Control

send_angle(id, degree, speed)

  • Function: to sends a specified single joint motion to a specified angle.
  • Parameters:
    • id: to stand for the joints of a robot arm. Six axis means that the robot arm has six joints, and four-axis means it has four joints. There are specific representation methods therefor.The method to represent the joint 1:Angle.J1.value. (It can also be represented by numbers 1-6.)
    • degree: means the angle of a joint.
    • speed: means the movement speed of the robot arm, ranging from 0 to 100.
  • Return value: None

set_encoder(joint_id, encoder)

  • Function: to sends a specified single joint motion to a specified potential value.

  • Parameters:

    • joint_id: to stand for the joints of a robot arm. Six axis
      means that the robot arm has six joints, and four-axis means it
has four joints. There are specific representation methods
therefor. The method to represent the joint 1:` Angle.J1.value`.
(It can also be represented by numbers 1-6.)
    • encoder:means the potential value of the robot arm, ranging from 0 - 4096.
  • Return value: None

Multi-Joint Control

get_angles()

  • Function: to get the angels of all joints.

  • Return Value: List: a list of floating point values which represent the angles of all joints

send_angles(degrees, speed)

  • Function: to send all angles to all joints.
  • Parameters:
    • degrees: (List [float]) contains the angles of all joints. A six-axis robot has six joints, so the length is 6; and the four-axis length is 4. The representation method is [20, 20, 20, 20, 20, 20]; value range: about -170 - 170. Each joint of the four-axis robot is different. See the table above for details.
    • speed: means the movement speed of the robot arm, ranging from 0 to 100.
  • Return value: None

set_encoders(encoders, sp)

  • Function: Send potential values to all joints of the robotic arm.
  • Parameters:
    • encoder: means the potential of the robot arm, ranging from 0 - 4096. Six axis length is 6, and four axis length is 4. The way to represent:[2048, 2048, 2048, 2048, 2048, 2048].
    • sp: means the movement speed of the robot arm, ranging from 0 to 100.
  • Return value: None

sync_send_angles(degrees, speed, timeout=7)

  • Function: to send an angle synchronously; return when reaching a target point.
  • Parameters:
    • degrees: A list of angle values of each jointList[float].
    • speed: (int) means the movement speed of the robot arm, ranging from 0 to 100.
    • timeout: The default time is 7s.
  • Return value: None

get_radians()

  • Function: to get the radian of all joints.
  • Return value: list: a list containing radian values of all joints

send_radians(radians, speed)

  • Function: to send radian values to all joints.
  • Parameters:
    • radians: means the radian values of the robot arm, ranging from -5 to 5.
  • Return value: list: a list containing radian values of all joints.

Simple Demo

from pymycobot.mycobot import MyCobot
from pymycobot.genre import Angle
from pymycobot import PI_PORT, PI_BAUD  # When using the Raspberry Pi version of mycobot, you can refer to these two variables to initialize MyCobot
import time

# MyCobot class initialization requires two parameters:
#   The first is the serial port string, such as:
#       linux:  "/dev/ttyAMA0"
#          or "/dev/ttyAMA0"
#       windows: "COM3"
#   The second is the baud rate:: 
#       M5 version is:  115200
#
#    Example:
#       mycobot-M5:
#           linux:
#              mc = MyCobot("/dev/ttyAMA0", 1000000)
#          or mc = MyCobot("/dev/ttyAMA0", 115200)
#           windows:
#              mc = MyCobot("COM3", 115200)
#       mycobot-raspi:
#           mc = MyCobot(PI_PORT, PI_BAUD)
#
# Initiate a MyCobot object
# Create object code here for windows version
mc = MyCobot("COM3", 115200)

#By passing the angle parameter, let each joint of the robotic arm move to the position corresponding to [0, 0, 0, 0, 0, 0]
mc.send_angles([0, 0, 0, 0, 0, 0], 50)

# Set the waiting time to ensure that the robotic arm has reached the specified position
time.sleep(2.5)

# Move joint 1 to the 90 position
mc.send_angle(Angle.J1.value, 90, 50)
# Set the waiting time to ensure that the robotic arm has reached the specified position
time.sleep(2)

# The following code can make the robotic arm swing left and right
# set the number of loops
while num > 0:

     # Move joint 2 to the 50 position
    mc.send_angle(Angle.J2.value, 50, 50)

    # Set the waiting time to ensure that the robotic arm has reached the specified position
    time.sleep(1.5)

    # Move joint 2 to the -50 position
    mc.send_angle(Angle.J2.value, -50, 50)

    # Set the waiting time to ensure that the robotic arm has reached the specified position
    time.sleep(1.5)

    num -= 1

#Make the robotic arm retract. You can manually swing the robotic arm, and then use the get_angles() function to get the coordinate sequence, 
# use this function to let the robotic arm reach the position you want.
mc.send_angles([88.68, -138.51, 155.65, -128.05, -9.93, -15.29], 50)

# Set the waiting time to ensure that the robotic arm has reached the specified position
time.sleep(2.5)

# Let the robotic arm relax, you can manually swing the robotic arm
mc.release_all_servos()

myBuddy

single joint control

send_angle(id, joint, angle, speed)

  • Function Send one degree of joint to robot arm.

  • Parameters

    • id – 1/2/3 (L/R/W)

    • joint – 1 ~ 6

    • angle – int

    • speed – 1 ~ 100

  • Returns

    • None

get_angle(id, joint_id)

  • Function Get the angle of a single joint

  • Parameters

    • id (int) – 1/2/3 (L/R/W).

    • joint_id (int) – 1 - 7 (7 is gripper)

set_encoder(id, joint_id, encoder, speed)

  • Function Set a single joint rotation to the specified potential value.

  • Parameters

    • id – 1/2/3 (L/R/W).

    • joint_id – 1 - 6.

    • encoder – The value of the set encoder.

  • Returns

    • None

multi-joint control

get_angles(id)

  • Function Get the degree of all joints.

  • Parameters

    id – 1/2 (L/R)

  • Returns

    A float list of all degree.

  • Return type

    list

send_angles(id, degrees, speed)

  • Function Send all angles to the robotic arm

  • Parameters

    • id – 1/2 (L/R).

    • degrees – [angle_list] len 6

    • speed – 1 - 100

set_encoders(id, encoders, speed)

  • Function Set the six joints of the manipulator to execute synchronously to the specified position.

  • Parameters

    • id – 1/2 (L/R).

    • encoders – A encoder list, length 6.

    • speed – speed 1 ~ 100

get_radians(id)

  • Function Get the radians of all joints

  • Parameters

    id – 1/2 (L/R)

  • Returns

    A list of float radians [radian1, …]

  • Return type

    list

send_radians(id, radians, speed)

  • Function Send the radians of all joints to robot arm

  • Parameters

    • id – 1/2 (L/R).

    • radians – a list of radian values( List[float]), length 6

    • speed – (int )1 ~ 100

Simple Demo

from pymycobot.mybuddy import MyBuddy
import time
mc = MyBuddy("/dev/ttyACM0", 115200)

# Send angles to the six joints of the left arm
mc.send_angles(1, [0, 0, 0, 0, 0, 0], 50)
time.sleep(3)

# Send the angle to the first joint of the left arm
mc.send_angle(1, 1, 90, 50)
time.sleep(2)

# Get the joint angle of the left arm
angles = mc.get_angles(1)
print("left angles: ",angles)

# Relax all joints of the left arm. Before running this command, please support the left arm with your hand to prevent it from falling suddenly
mc.release_all_servos(1)

myPalletizer 260

Simple Demo

from pymycobot.mypalletizer import MyPalletizer260
import time
# import the project package

# Initiate a MyPalletizer260 object, M5 version
mc = MyPalletizer260("COM3",115200)

# PI version
# mc = MyPalletizer260("/dev/ttyAMA0",1000000)

# By passing the angle parameter, let each joint of the robotic arm move to the position corresponding to [0, 0, 0, 0, speed]
mc.send_angles([0, 0, 0, 0,], 50)
#  Set the waiting time to ensure that the robotic arm has reached the specified position
time.sleep(2)

# Move joint 1 to the 50 position
mc.send_angle(1,20,50)
# Set the waiting time to ensure that the robotic arm has reached the specified position
time.sleep(2)
# set variable "num"
num = 2
# set the number of loops
while num > 0:
    mc.send_angle(2,20,50)
    time.sleep(2)
    mc.send_angle(2,(-20),50)
    time.sleep(2)
    num -= 1

# make robot arms reach the specified position
mc.send_angles([-0.87, 41.66, -12.13, -0.17], 50)
#  Let the robotic arm relax, you can manually swing the robotic arm
mc.release_all_servos()

myArm

Simple Demo

from pymycobot.myarm import MyArm
from pymycobot.genre import Angle
import time
# import the project package

# Initiate a MyArm object
mc = MyArm("/dev/ttyAMA0", 115200)
# By passing the angle parameter, let each joint of the robotic arm move to the position corresponding to [0, 0, 0, 0, 0, 0, 0,speed]
mc.send_angles([0, 0, 0, 0, 0, 0, 0], 50)
#  Set the waiting time to ensure that the robotic arm has reached the specified position
time.sleep(2)

# Move joint 1 to the 90 position
mc.send_angle(1,90,50)
# Set the waiting time to ensure that the robotic arm has reached the specified position
time.sleep(2)
# set variable "num"
num = 2
# set the number of loops
while num > 0:
    mc.send_angle(2,20,50)
    time.sleep(2)
    mc.send_angle(2,(-20),50)
    time.sleep(2)
    num -= 1

# make robot arms reach the specified position
mc.send_angles([-5.25,-30,-20,-12,-10,-10,10],50)
#  Let the robotic arm relax, you can manually swing the robotic arm
mc.release_all_servos()

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