How to Select a Coding and Marking Machine Based on Speed, Material, and Production Environment

Start With the Product at the Coding Point

Look at the product where printing will take place. Its position and movement at that point tell you more than the total daily output. A bottle arrives with a gap between products, while the cable runs continuously. The film follows the packaging machine, and a component may arrive in a fixed holder.

Measure the Space Available for Coding

Start on the product. Measure the area available for the complete code. Leave out label edges, seams, ribs, folds, and other areas where you do not want the print.

Next, measure the space around the conveyor or machine. The printhead needs a mounting position that keeps the required distance from the product. The sensor also needs a clear view of each pack where product detection is required.

Use the Fastest Product Format

If one line runs several products, don't take measurements from only the easiest one. Suppose a line runs 500 ml and 1.5 L bottles. The smaller bottle may pass the coder faster, while the larger bottle may leave less clearance around the printhead. Record both conditions.

For each format, note the maximum conveyor speed, product gap, coding area, and full code. Give these figures to the supplier when comparing a coding and marking machine.

Match the Machine to the Material Being Marked

Once the speed requirement is clear, put the actual product material next to it. Don't start with a machine model and then try to make it work on every surface. Some combinations can be ruled out as soon as you test the mark.

Non-Porous Materials Need the Right Ink or Marking Response

PET bottles, glass jars, aluminium cans, and metal parts do not absorb ink. With an ink-based machine, look at what happens after the code lands on the surface.

Print the code and give it the same drying time available on the line. Then handle the product as production would. If ink transfers when bottles touch, smears against a guide, or wipes easily from the surface, that ink setup is not ready for the job.

Flexible Materials Need a Stable Coding Point

Film, foil, and cable keep moving while the code is applied. Their path past the printhead, therefore, becomes part of the machine setup.

Watch the film at normal running speed. If it moves sideways, the code position will move with it. On the cable, look for vertical or sideways movement that changes the distance between the cable and the printhead.

Look at the Conditions Around the Machine

Check the proposed machine location during production and cleaning. A clean area during shutdown can look very different after the line has run for eight hours. Note what actually reaches the coder and where it collects.

Dust Around the Coding Station

On cement, powder, and building-material lines, fine dust can settle on the coder throughout the shift. Look at the printhead first, then the product sensor, cooling openings, connectors, and exposed controls.

The location can make the problem worse. A coder mounted below a dusty conveyor or close to a bag-filling point will receive more dust than one positioned away from the product discharge.

Water and Washdown

Walk around the coding point during normal cleaning. See whether water only reaches the floor or also reaches the printer, printhead, sensor, cables, and connectors.

A few drops from wet bottles are different from a hose being used beside the machine every shift. Record whether the area has splashing, condensation, regular washdown, or high-pressure cleaning nearby.

Use those conditions when checking the machine's enclosure rating and installation requirements. Don't specify protection simply because the plant is classified as a wet production area.

Run the Shortlisted Machine on Your Real Job

Once you have a machine in mind, test it near the limits you expect to use. A demonstration at low speed with a short sample message tells you very little about how the machine will behave during a full production run.

Run at Maximum Planned Speed

Set the trial at the highest speed recorded on your selection sheet. If the line normally runs between 180 and 240 bottles per minute, include a run at 240. Keep the normal product spacing as well. Take samples throughout the run rather than checking only the first few bottles.

Watch the print position as the speed increases. The code should remain complete and in the same coding area.

Print the Most Demanding Code

Use the longest message expected on that line. If some products need one line and others need three, test the three-line format.

Do the same with character size. If production requires a larger date or a DataMatrix code, include it in the trial instead of using the supplier's standard test message.

Use the Hardest Product Format

Pick the product that gives the machine the least room to work. It may be a small bottle with only 15 mm available for the code, a dark component with poor mark contrast, or a product that passes the printhead faster than the others.

FAQs About Selecting Coding and Marking Equipment

Benefits of Partnering with LeadTech

Coding and Marking Machines for Different Production Jobs

LeadTech manufactures continuous inkjet, laser marking, and piezo inkjet equipment. Its current range includes CIJ machines for variable production coding, CO₂, fiber, and UV laser systems, and piezo inkjet equipment for medium- and large-format printing.

The choice can start from the job itself. Send the product material, required code, maximum speed, and conditions around the coding point. LeadTech states that its application work considers material, line conditions, code content, and inspection requirements before recommending a solution.

Support for Customers Worldwide

LeadTech was founded in 2011 and currently reports more than 85 global distributors and an installation base of over 80,000 units. The company also lists 24/7 technical support on its website.

For buyers working outside China, these are useful points to discuss before purchase: who handles installation in your country, where consumables and spare parts come from, and which team handles service for your location.