Attentions Of SMT Equipment When Resume Working

- May 27, 2020-

With the COVID-19 under control, many company have resumed working. What should factory pay attention to?

Each area of factory must be disinfected and sterilized to ensure the protection and safety of personnel inside the plant, industrial safety inspection, fire inspection and other commencement inspection. Followings are some suggestions of SMT equipment from Dafton-SMT.

1.The attentions before start up SMT equipment

First, confirm whether the temperature and humidity of the SMT workshop exceed the environmental requirements, whether the equipment is damped, and whether there is dew. Do not rush to raise the temperature of the SMT workshop in a relatively cold environment, and the equipment is prone to generate dew (do not turn on the power at this time). Refer to different SMT workshop environment of each factory for specific practices.

Select the dehumidification treatment time for the equipment according to the different degree of damp (check whether the electrical part of industrial control is normal) open the front and rear case covers of the equipment (pay attention not to touch the wires inside), place the fan at 0.5m in front of the case for blowing (the purpose is to remove the moisture in the case of the equipment with blowing, note: hot air cannot be used), and select 2-6 hours for blowing according to the degree of damp Wind operation, power on after dehumidification operation, start the machine without returning to the original point after checking, and preheat at the original point after 30-60 minutes.

2.SMT production line

(1) Turn on the air conditioner of the plant in advance, and the temperature and humidity meet the requirements.

(2) Turn on the air source switch of the workshop and confirm that the air pressure meets the requirements.

(3) Confirm that the main power supply of workshop equipment is off.

(4) Confirm that the main power supply voltage of workshop or production line meets the requirements, and turn on the switch.

(5) And turn on the power of the equipment one by one. After the equipment is fully turned on, turn on the next equipment one by one.

(6) After the power supply of the equipment is turned on, the original point is recovered and the test mode is hot.

3. Solder Paste Printing Machine

(1) Remove the scraper to clean up the residual solder paste.

(2) Fill special new lubricating oil after the guide rail of screw rod is cleaned.

(3) Clean the public dust of the electrical department with an air gun.

(4) Protect the phase with anti sitting cover.

(5) Check whether the rail transport belt is replaced.

(6) Whether the cleaning mechanism and device need to be cleaned.

(7) Whether the cylinder steel mesh mechanism is normal.

(8) Check whether the air circuit is normal.

(9) Whether the electrical industrial control is normal.

4. SMT Machine

(1) Check whether the electrical part of industrial control is normal.

(2) Check if there is any product missing in the Mounter.

(3) Whether the track belt is damaged or deformed.

(4) Inject special new lubricating oil into the screw rod after cleaning the dust,

(5) Whether the air circuit of SMT nozzle is normal.

(6) Cleaning and maintenance guide chute of SMT feeder .

(7) Automatic change SMT nozzle device cleaning and static electricity removal inspection and maintenance.

(8) Cleaning and electrostatic removal inspection and maintenance of throwing box.

(9) Cleaning, inspection and maintenance of universal machine backpack mechanism.

(10) Inspection and maintenance of automatic SMT feeder mechanism.

5. Reflow Oven

(1) Annual maintenance of reflow oven.

(2) Clean the residual components and rosin in the furnace, add high temperature chain oil after the cleaning and maintenance of the transport chain, and check and maintain the detailed mesh belt.

(3) Clean the Run Induction Motor with an air gun. The dust on the heating wire and the part of the reflow soldering electric box, mainly the dust inside the electric box, must be added with drying agent to avoid the electric appliance from facing.

(4) Completely cut off the power supply of the equipment, and make sure that UPS power supply is off.

(5) Confirm whether the fan operates normally.

(6) Check whether the system in the four temperature areas of preheating area, constant temperature area, reflux area and cooling area is normal.

(7) Inspection and maintenance of flux recovery system in cooling area.

(8) Check whether the waterway is normal.

(9) Whether the furnace sealing strip device is normal.

(10) Inspection and maintenance of import and export curtain.

(11) The vent plate shall be inspected on the track to see if there is any deformation and jamming.

6. Wave Soldering

(1) Completely remove the welding aid residue of the spray device, empty the welding aid, add alcohol, and use the continuous spray mode to clean the welding aid pipeline and nozzle. After cleaning, empty the alcohol to ensure that there is no flux or alcohol inflammable on the machine.

(2) Use an air gun to clean the dust on the Run Induction Motor and the heating wire. Use a gun to clean the electric box, mainly the dust inside the electric appliance. If necessary, add a drying agent to avoid the electric appliance facing south.

(3) Completely cut off the power supply of the equipment.

(4) Whether the electrical part of industrial control is normal.

(5) Track inspection and maintenance.

7. AOI Equipment

(1) Clean and maintain the guide screw and add new grease.

(2) Use the air gun to remove the dust in the electric appliance, and add desiccant into the electric box.

(3) Clean and protect with dust cover.

(4) Check whether the light source mechanism is normal.

(5) Check whether the moving shaft and motor of the equipment are normal.

8. SMT Loader and Unloader

(1) Clean and maintain the ball screw and add new grease.

(2) Use the air gun to remove the dust in the electric appliance, and add desiccant into the electric box.

(3) Clean and protect with dust cover.

(4) Check whether the light source mechanism is normal.

(5) Check whether the moving shaft and motor of the equipment are normal.

9. Conveyor

(1) Clean and oil the transmission shaft and pulley.

(2) Clean the sensor.

10.Operator of SMT machine/equipment

(1) During the working period, take the initiative to accept the staff's temperature measurement, and regularly report the physical condition, such as whether there is fever, fatigue, dry cough or dyspnea, and actively cooperate with the staff of the unit to do a good job in the situation registration;

(2) Masks must be worn during the working period. Spitting is forbidden. The waste of protective masks and mouth and nose secretions shall be wrapped with paper towels and put into the designated special medical waste bucket. Try to avoid touching the mouth, nose, eyes and other parts with hands, wash hands frequently and drink more water;

(3) If any abnormal symptoms are found during the working period, such as fever, fatigue, dry cough or dyspnea, they must be reported to the management personnel of the unit immediately, disinfected on site immediately, put on masks and go to the fever clinic of the designated hospital in time, and inform the unit of the diagnosis results. For medical treatment, the unit shall arrange vehicle transfer. It is strictly prohibited to go to other medical institutions without permission. It is strictly prohibited to take public transport without permission. Relevant vehicles shall be disinfected immediately after the transfer;

(4) During the working period, dining shall be carried out in the way of separate meal and peak shift; the tableware shall be used by individuals in a fixed way, and the hands shall be washed before and after the meal; during the meal, people shall not gather and talk with each other;

(5) Avoid collective activities or meetings as much as possible during work; if it is necessary to travel on business, the unit shall arrange vehicle transfer, and relevant vehicles shall be disinfected immediately after the transfer;

(6) During the working period, they shall concentrate on their work and do not carry out any activities unrelated to their work; they shall not spread rumors, believe in rumors or spread rumors, and shall not use social media to spread unofficial information and strictly abide by the work confidentiality discipline.