Dual-head suction pump

Applicable models: myCobot 280, myPalletizer 260, mechArm 270

Product image

Specifications

Suction pump: Used for adsorbing objects

Introduction

• Suction pump, that is, vacuum adsorption pump, has two suction nozzles and two exhaust nozzles for one inlet and one outlet. It is more stable than single-head suction pump. It has the advantages of simple structure, small size, easy use, low noise, and good self-priming ability. By controlling the suction pump kit as the end effector of the robot arm, the function of adsorbing objects is performed.

• Suction pump accessories: power cord x1, DuPont line x10, one-input and two-output connection line x1, Lego technology parts x several

Working principle

• When sucking objects: the air pump starts to suck air and adsorb objects and then stops, and there will be no leakage in a short time.
• When putting down the object: the electronic valve starts, the air release valve opens, and air enters the vacuum suction cup to separate from the sucked object.

Applicable objects

• Paper/plastic sheets
• Flat and smooth objects
• Cards, etc.

Installation and use

• Check whether the accessories package is complete: Lego connectors, Dupont wires, double-head suction pump

• Double-head suction pump installation:

Structural installation:

Insert the Lego connector into the reserved socket on the suction pump:

Align the suction pump with the connector plugged in with the socket at the end of the robotic arm and insert it:

• Electrical connection:

Select the male-female DuPont wire, and insert the female end into the socket marked with pins on the suction pump box:

Note the correspondence between the DuPont wire colors and pins in the figure:

Insert the male end into the robot base pin according to the given correspondence:

The left side is the suction pump pin, and the right side is the robot arm pin GND -> GND 5V -> 5V G2 -> 21 G5 -> 20

Programming development:

The code is as follows:

• 280-M5 version:

from pymycobot.mycobot import MyCobot
import time

# Initialize a MyCobot object
mc = MyCobot("COM3", 115200)

# Turn on the suction pump
def pump_on():
# Open the solenoid valve
mc.set_basic_output(5, 0)
time.sleep(0.05)

# Stop the suction pump
def pump_off():
# Close the solenoid valve
mc.set_basic_output(5, 1)
time.sleep(0.05)
# The exhaust valve starts working
mc.set_basic_output(2, 0)
time.sleep(1)
mc.set_basic_output(2, 1)
time.sleep(0.05)

pump_off()
time.sleep(3)
pump_on()
time.sleep(3)
pump_off()
time.sleep(3)

GPIO.cleanup() # Release pin channel

• 280-Pi version:

from pymycobot.mycobot import MyCobot
from pymycobot import PI_PORT, PI_BAUD # When using the Raspberry Pi version of mycobot, you can reference these two variables to initialize MyCobot
import time
import RPi.GPIO as GPIO

# Initialize a MyCobot object
mc = MyCobot(PI_PORT, PI_BAUD)

# Initialization
GPIO.setmode(GPIO.BCM)
# Pins 20/21 control the solenoid valve and the exhaust valve respectively
GPIO.setup(20, GPIO.OUT)
GPIO.setup(21, GPIO.OUT)

# Turn on the suction pump
def pump_on():
# Open the solenoid valve
GPIO.output(20,0)

# Stop the suction pump
def pump_off():
# Close the solenoid valve
GPIO.output(20,1)
time.sleep(0.05)
# Open the vent valve
GPIO.output(21,0)
time.sleep(1)
GPIO.output(21,1)
time.sleep(0.05)

pump_off()
time.sleep(3)
pump_on()
time.sleep(3)
pump_off()
time.sleep(3)

GPIO.cleanup() # Release the pin channel

Save the file and close it, return to the command line terminal, and enter:

python pump_double.py

You can see that the suction pump opens after 3 seconds and closes after working for 3 seconds