SMT Line Equipment Maintenance Process

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Industrial manufacturers strive for minimizing production line downtime, which is why it’s essential to improve your SMT line productivity with preventative maintenance strategies. CTI SUPPLY hereby points out the importance of SMT line equipment preventive maintenance. In order to improve the overall equipment efficiency and reduce maintenance costs, regular maintenance and repair of SMT equipment is required.

Why does SMT Line Equipment Maintenance matter to the overall manufacture? 

It is the goal of every SMT production line we know to avoid equipment failure by any means necessary. Any machine failure on the line is wasting precious time and money. The best way to ensure a higher mean time between failure (MTBF) is to schedule and perform routine preventive maintenance to identify and fix problems before production is affected.

During a period of economic downturn, it may be tempting to avoid preventative maintenance downtime to keep production running and income pouring in. However, in our experience, that leads to costly repairs, equipment replacement, and a line that is out of service for a much longer time than any maintenance would have caused.

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Creating an SMT line equipment maintenance checklist is one way to stay on top of routine and preventative maintenance tasks. We suggest taking things a step further and keeping meticulous service logs for each piece of equipment on your PCB assembly line. If you keep accurate records, you will eventually see patterns and be able to address problems before they happen.

If you know you typically get 1200 hours of production time from your flying probe tester before it needs maintenance, you can plan for that SMT line equipment maintenance and keep your manufacturing running smoothly.

Common Failures

Electrical failures are common in SMT equipment lines due to heat stress, especially when turning equipment on and off frequently. Being aware of the effects of this simple act is a form of preventative maintenance that can decrease the frequency of many common problems. Many electrical components may experience failure from thermal stress.

  • Power Supplies
  • Resistors
  • Fuses & Coils
  • Transformers
  • Relay Contacts
  • Cables & Plugs

Common Tasks for SMT Line Equipment Maintenance

Used SMT pick and place machines are one piece of equipment in the production line that can cause errors on the line if regular maintenance is not performed. They require regular cleaning, especially for nozzles. Poorly maintained nozzles can lead to picking up the wrong components, misplacing components, and even flipped components. All of this leads to eventual board failure.

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SMT line equipment, machine maintenance is essential for every piece of equipment, from screen printers to wave solder machinery and reflow ovens

SMT line machine maintenance is essential for every piece of equipment, from screen printers to wave solder machinery and reflow ovens. It’s always worth a small amount of downtime.

  • Inspect & clean regularly
  • Clean & replace nozzles
  • Maintain & repair exhaust fans
  • Repair or replace electrical components
  • Check cooling systems & fans
  • Remove excess solder paste deposits
  • Replace perishable parts as needed

General Procedure of SMT Line Equipment Maintenance 

Routine maintenance

  • Clean the surface of the equipment every day
  • Automatically warm up for at least 20 minutes every day before production
  • Check whether the moving parts of the SMT pick and place machine are in good connection and whether the screws are loose
  • Clean the surface of each sensor
  • Add lubricating oil to maintain active parts every week
  • Check whether the suction nozzles of SMT pick and place machines are clogged and add liquid oil
  • Clean laser head and camera lens.
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Routine and preventive maintenance applied for SMT Line Equipment

Monthly maintenance

  • Clean the machine head and replace the lubricant on the movable shaft
  • Clean the dirt on the moving parts. Replace the lubricant on the X and Y axes
  • Check whether the grounding wire is in good connection

It is an annual inspection to check whether the power connection with the electrical box is good. Check the wear of devices of equipment and replace it for repair.

Main categories of SMT Line Equipment Maintenance 

SMT Stencil Printer Maintenance

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JUKI Stencil Printer in SMT Line Equipment

For the printing press offset, continuous printing welding, screen cleaning is not clean, PCB camera imaging blur and other issues to improve the maintenance of the printing press lubrication, as follows:

  • X-axis and Y-axis screw oiling and lubrication ensure the equipment’s running accuracy and reduce the wear of vulnerable parts.
  • Camera split maintenance: Wipe and calibrate the convex lens of the glass sheet light source.
  • Dust removal and cleaning of the equipment’s main box and body
  • Lubricate and smooth the plywood cylinder and wiping cylinder, and clean the workbench to ensure the flatness of the printing platform.

Pick and Place Machine Maintenance

JUKI Pick and Place Machine in SMT Line Equipment
  • Move the lens, clean the dust and residue on the lens, re-calibrate to improve the accuracy of material identification.
  • Disassembly and cleaning of the board of the equipment theme, clean the dust of the driver’s main board image card, vacuum pump and cooling fan with air gun.
  • Replacement of X-axis and Y-axis screw oil-filled track movable wheel bearings and replacement of aging belts ensure smooth transportation of PCB boards.
  • Clean the suction nozzle. Perform ultrasonic cleaning on the hold, replace the filter cotton, and check the reflector and blockage of the suction nozzle with a microscope.

Reflow Oven Maintenance

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JUKI Reflow Oven in SMT Line Equipment
  • The rosin flux in the furnace is cleaned to ensure the smoothness of the blower and to prevent the occurrence of poor oil dripping from the equipment.
  • Clean up the greasy dirt on the chain and inject new high-temperature chain oil to ensure smooth transportation.
  • Replace the filter of the exhaust air inlet and outlet.

Above are the maintenance summary of SMT pick and place machines in different periods. In order to make our equipment output with high efficiency and high quality, we must make the maintenance work in place.

CTI SUPPLY – Maintenance Technical Support

CTI SUPPLY maintenance engineers at the on-site manufacturing plant ready to handle and resolve technical issues of industrial production lines. In particular, the unit provides a variety of maintenance and repair services as followings:

  • Electrical automation system applied with PLC/SCADA/HMI Foundation
  • Food processing and packaging system
  • Automated assembly system
  • Semi-Automatic to Fully Automatic equipment
  • Multiple Hydraulic and pneumatic systems
  • Automatic conveyor system
  • Pressing, Fine Blanking, Rolling, Cutting, Bending Machine
  • Hardening and Tempering Furnace system


CTI SUPPLY improves the profitability for clients by performing different scope of installation, commissioning and maintenance services under OEM’s instruction at the customer’s site. The scope of activities is diverse, our team experienced with many years of designing, programming and maintaining machinery in the oil and gas industry and large European manufacturing plants in Vietnam. In particular, we plays the role as local technical support on site for customers under OEM authorization with in-time flexibility and activeness.

Are you looking for a SMT Line system maintenance team? Contact us.

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