UV Laser Marking Machine Guide: 9 Video Tutorials

Video Tutorial

How to Operate JHIMS R6-U UV Laser Marking Machine – Step-by-Step Video Guide (2026)

Master the JHIMS R6-U UV laser marking machine with 9 video steps — from installation and calibration to marking verification and daily upkeep. Follow along, pause, and practice each step.

✎ Written by JHIMS Engineering✓ Reviewed by Rock Xie📅 Updated 2026-08-16⏱ 68 min read

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Direct answer: Master the JHIMS R6-U inline UV laser marking machine with 9 progressive video tutorials — from installation and laser calibration to QR code marking workflow, Bad Mark defect skipping, and troubleshooting. Follow along with the on-screen demonstrations, then use the written steps, maintenance tables and decision tree to keep the line running.

Key Takeaways

1 Watch the 9 videos in order — each maps to one daily task on the R6-U.
2 Calibrate the laser position after every lens cleaning or mirror adjustment.
3 Check chiller coolant daily; a failing chiller is the #1 cause of mark inconsistency.
4 Keep QR codes standalone objects — grouping destroys the encoded data.

UV Laser Marking Machine Video Tutorial — 9 Steps to Full Mastery

Step Navigator

Click any step to open that tutorial video. The main player above shows the full 9-step sequence.

UV Laser Marking Machine Step-by-Step Written Guide

Step 1: Installation & Pre-Start Preparation

R6-U UV laser marking machine before power-on: remove the red transport locks (see the wooden box or machine door), level it, connect the water chiller, verify coolant flow — 355nm laser diode needs continuous cooling.

Step 2: Software Operation & Laser Calibration

Jinghe software, R6-U UV laser marking machine: three modules — Main Interface, Recipe Management, Calibration. “Laser Position”: click the crosshair to align preview to laser point, mapping coordinates to galvanometer.

Step 3: Optimal Marking Parameters

UV lasers give cold marking with minimal heat-affected zone. Balance speed and quality via laser power, marking speed, frequency. White oil UV engraving: fill mode. Trust results over theory; verify on a sample board.

Step 4: Basic Operation: Interface, Motion, Track & Camera

Manual motion control: X and Y axis, quick movement. Set conveyor track height and width per PCB; reset the track only on request. Camera on/off, magnification, visual inspection; external vs program-defined lighting.

Step 5: PCB Loading, Unloading & User Accounts

Load and unload PCBs on the support structure for accurate positioning. In production mode the inline conveyor feeds boards automatically. User account: log out when done to protect recipes from unauthorized edits.

Step 6: PCB QR Code Marking Workflow

UV workflow: place the QR code object in a single template, align the PCB by CCD, run the marking cycle; online barcode reader verifies each mark. Panelized boards repeat per panel with automatic fiducial correction.

Step 7: Template Editing Window

In the template editor, master alignment, rotation and centering — 80% of daily design tasks. For complex work, import DXF files instead of redrawing. Set the mark origin and verify positions in preview before saving.

Step 8: Bad Mark Setup for Defective PCB Skip

Bad Mark: skip QR code engraving on defective PCB panels — set the Bad Mark position in the template, teach the vision system the defect indicator, enable the skip function; the camera flags it and marking continues.

Step 9: Troubleshooting Common Issues

Too light: more power or slower speed. Too dark: less power, check focus. Missed: CCD alignment, Bad Mark. Blurred: clean CCD lens, check galvanometer calibration. Inconsistent: chiller temperature. Decision tree below.

Troubleshooting & Fault Diagnosis

Fault Diagnosis Table

Symptom	Probable Cause	Probability	Correction
Marks too light / invisible	Laser power too low or focus drift	30%	Increase power in 2% steps; verify focus height
Marks too dark / burning	Power too high for material	20%	Reduce power; switch to fill mode for white oil
Blurred or stretched edges	CCD lens dirty or galvanometer misaligned	35%	Clean CCD lens; recalibrate laser position
Inconsistent mark density	Chiller temperature drift	15%	Check coolant level and chiller operation
Missed marks on some panels	Bad Mark misdetection or fiducial error	10%	Verify Bad Mark pad; re-teach fiducials
QR code unreadable	QR merged with other objects	25%	Re-create QR as standalone object; never group
Servo motor alarm	Motor cable loose; XYZ transport lock blocks not removed; missing neutral return	–	Reconnect motor cables; remove all axis lock blocks; trace and rejoin the neutral line
“Transport board jam” alert	Track width too narrow; belt/pulley seized; photoelectric sensor obstructed	–	Re-adjust track width and save the recipe; clean belt, pulley and sensor area
Mark size differs from camera view	PCB not lifted or flattened; camera scale not calibrated	–	Check the board-lift unit; recalibrate camera display scale
Mark position offset	PCB not flat or deformed; laser calibration off; template not centered	–	Lift board flat (support sagging panels); redo laser calibration; center the template
No laser output (UV model)	Chiller off or in alarm; coolant tube folded or leaking; software opened before warm-up; no marking signal	–	Start chiller and clear alarm; check coolant line; wait for warm-up; check marking card output
Galvo no scan or line output	Galvo power missing; galvo plug loose	–	Verify galvo input/output voltage (DC 15V +/-); reseat the galvo plug
Board entry position inconsistent	Loading delay too short; belt speed too high causing bounce	–	Increase loading delay; lower belt and deceleration speed
Flip track not flipping	Motor stuck or driver alarm; motor power cable loose	–	Check driver alarm and motor load; reseat motor power cable
Mouse or keyboard frozen	USB hub not powered; USB connector loose	–	Check hub power LED; reseat mouse and keyboard connectors
PC lags or auto-restarts	Poor cooling; insufficient supply voltage	–	Clean cooling vents and filters; check plug and supply voltage
Laser power weakens	Dust on field lens or mirrors; optical path drifted	–	Clean optics with alcohol and lint-free cloth; check and adjust the optical path
No power or contactor chatters	Unstable voltage; neutral line broken; E-stop pressed	–	Measure supply voltage; check the neutral line; release the E-stop
Door-lock alarm or cannot close	Sensor out of range; cylinder not reaching the lock	–	Adjust door-lock sensor distance; check cylinder travel
Mark light on one side	Laser-on delay too early or late; board uneven	–	Adjust laser-on delay (negative values allowed); flatten or replace the board
Track width mismatch	Track not homed; track belt loose	–	Re-home the track and recalibrate width; tension the sync belt
Camera image frozen (machine runs)	Camera IP changed or conflict; camera power off; network cable loose	–	Check camera IP; verify camera power; tighten the network cable

Daily Start-up Checklist

Electrical controls operate normally
Transport motors & ball screws free of abnormal noise
Photoelectric sensors clean – prevent false alarms
Conveyor track runs smoothly
Control software runs normally
Air pressure within 0.1-0.2 MPa
Chiller ON before laser start (prevents overheat alarm)
Laser head power indicator lit
No alarm indicators on the machine
Smoke extractor running; belts free of wear or misalignment

Decision Tree: Marking Quality Problem?

Start with the symptom table above, then apply the Six Most Common Operator Mistakes below — in most cases the root cause is power, focus, optics cleanliness, or chiller temperature.

Consumables & Replacement Filters

Consumable	Part No.	Replacement Cycle	Note
Pre-filter	3.9.4.0.0012	1-3 months	Replace when suction drops
Chiller filter element	3.6.6.0.0315	3-6 months	Chiller-equipped models only
Main filter	3.9.4.0.0013	6-12 months	–
Gas filter	3.9.4.0.0014	6-12 months	–
Photoelectric sensor (spare)	2.5.1.1.0004	–	Omron; included with machine
Electronic relay (spare)	2.6.6.2.0003	–	Omron; included with machine
Drive belts (spare)	3.2.2.1.0268 / 3.2.2.1.0054	–	2 pieces each, included

Maintenance Cycle Table

Frequency	Task	Method	Est. Time
Daily	Check chiller coolant level	Visual level check	2 min
Daily	Verify marking quality on first board	Scan QR with reader; visual check	3 min
Weekly	Clean CCD lens	Lens tissue + approved cleaner	10 min
Weekly	Clean conveyor track and support rails	Vacuum + lint-free cloth	10 min
Monthly	Recalibrate laser position	Crosshair tool in software	5 min
Monthly	Inspect mirrors and protective window	Visual; clean if dusty	15 min
Quarterly	Replace chiller coolant	Per chiller manual	20 min
Quarterly	Full safety system check	Interlock, e-stop, housing seals	15 min

Reference & Field Best Practices

Parameter Quick-Reference Table

Parameter	Recommended	Allowed Range	Notes
Laser power	Material-dependent	0–100%	Adjust in 2% steps
Marking speed	Medium default	Slow–Fast	Balance speed vs depth
Focus height	Per lens spec	±0.5mm	Verify after head service
QR size	≥1.2×1.2mm	1.2×1.2mm min	Smaller fails readability
Chiller temp	Per chiller spec	±1°C	Stable temp = stable power

Six Most Common Operator Mistakes

Grouping converts QR/barcodes into plain images and destroys their data. Never combine or group them.
Any optical disturbance shifts the beam. Recalibrate with the crosshair tool after every cleaning.
Low coolant or failed chiller drifts laser power and can kill the diode. Check daily.
Overpowering carbonizes FR4 and reduces QR contrast. Reduce power, not quality.
A dirty Bad Mark pad causes skips on good boards. Keep the pad clean and high-contrast.
The interlock is a safety system. Never bypass it — 355nm UV can damage eyes instantly.

Seven Field Rules from 15 Years of Installations

Calibrate after every optical service. Beam alignment is the #1 quality variable.
Keep QR codes standalone. Grouping is the most common data-loss mistake.
Verify the first board of every shift with a real scanner, not just your eyes.
Watch chiller temperature. A 2°C drift changes mark contrast noticeably.
Use fill mode for white oil. Vector mode leaves gaps that fail readability.
Keep spare lenses and mirrors on site. Downtime for a $50 part is the costliest failure.
Document template versions. When a recipe changes, the old version is the rollback.

UV Laser Marking Machine FAQ

What is the minimum QR code size the R6-U can mark?▼

The R6-U marks QR codes as small as 1.2×1.2mm with a minimum line width of 0.04mm and minimum character height of 0.2mm, enabling high-density traceability codes on space-constrained PCBs.

Why is 355nm UV laser called cold marking?▼

At 355nm, UV photons carry enough energy to directly break molecular bonds (photochemical ablation) instead of heating the material. The heat-affected zone is minimal, protecting sensitive PCB substrates, solder joints, and nearby components from thermal damage.

How fast is the R6-U cycle time?▼

The R6-U achieves approximately 7 seconds per full cycle including loading, positioning, marking, and verification. With the inline conveyor it sustains production throughput of up to 500 boards per hour.

How do I calibrate the laser position?▼

Open the Laser Position tool in the Jinghe control software and click the crosshair to align the software preview with the actual laser point. Perform this calibration after any lens cleaning, mirror adjustment, or machine relocation.

What maintenance does the water chiller require?▼

Check the coolant level weekly, inspect for leaks monthly, and replace the coolant per the chiller manufacturer’s schedule (typically every 6–12 months). The chiller keeps the laser diode at stable operating temperature, which directly affects marking consistency.

How does Bad Mark skip work?▼

The Bad Mark feature scans a designated mark on each panelized PCB. When a defective panel is detected, the machine automatically skips QR code engraving on that panel, saving cycle time and preventing wasted processing on known-bad boards.

What safety glasses are required?▼

Always wear laser safety glasses rated OD 4+ (optical density 4 or higher) for the 355nm UV wavelength. Never look directly at the laser beam or its specular reflections, even with glasses.

Can the R6-U integrate into an existing SMT line?▼

Yes. The R6-U is an inline machine with conveyor integration and SMEMA-compatible communication, designed to slot directly into SMT/PCBA production lines between stations for automated traceability marking.

Why does the machine show a “servo motor alarm”?▼

The motor cable may be loose, the XYZ transport lock blocks may not have been removed after shipping, or the neutral return may be missing. Reconnect the motor cables, remove all axis lock blocks, and trace the neutral line with a multimeter.

Why does the “transport board jam” alert appear?▼

The track width is too narrow, the belt or pulley is seized, or the photoelectric sensor is obstructed. Re-adjust the track width and save the recipe, then clean the belt, pulley and sensor area.

Marking size differs from what the camera shows▼

The PCB is not lifted or flattened, or the camera display scale is not calibrated. Check the board-lift unit and recalibrate the camera display scale.

Why is the marking position offset?▼

The PCB is not flat or is deformed, the laser calibration is off, or the marking template is not centered. Lift the board flat (use the bottom support for sagging panels), redo the laser calibration, and center the template.

What should I check when there is no laser output on the UV model?▼

Check that the chiller is running without alarms, the coolant tube is not folded or leaking, the software was opened after warm-up, and the marking card is outputting a signal. Fix each in order and restart.

The galvanometer is not scanning or outputs a line▼

The galvo may have no power or its plug is loose. Verify the galvo input/output voltage (DC 15V +/-) and reseat the plug.

Board entry position is inconsistent every cycle▼

The loading delay is too short or the belt speed is too high, causing the board to bounce off the stopper. Increase the loading delay and lower the belt and deceleration speeds.

The flip track does not flip or flips one side only▼

The motor may be stuck or the driver in alarm, or the motor power cable is loose. Check the driver alarm and motor load, then reseat the motor power cable.

Mouse or keyboard is frozen▼

The USB hub is not powered or the USB connector is loose. Check the hub power indicator and reseat the mouse and keyboard connectors.

The PC lags or restarts by itself▼

Cooling may be insufficient or the supply voltage too low. Clean the cooling vents and filters, check the plug, and measure the working voltage.

Laser power is getting weaker▼

The field lens or mirrors are dusty, or the optical path has drifted (optical-path UV models). Clean the optics with alcohol and a lint-free cloth, then check and adjust the optical path.

The machine has no power or the contactor chatters▼

The supply voltage is unstable, the neutral line is broken or loose, or the E-stop is pressed. Measure voltage and current, check the neutral line, and release the E-stop.

Door-lock alarm or the door will not close▼

The sensor is out of range or the door-lock cylinder is not lifting into the lock frame. Adjust the sensor distance and check the cylinder travel.

The mark is light on one side and dark on the other▼

The laser-on delay is too early or too late, or the board is uneven (typical on large boards at opposite corners). Adjust the laser-on delay (negative values allowed) and flatten or replace the board.

Track width does not match the actual board▼

The track has not been homed or the track belt is too loose. Re-home the track, recalibrate the width if needed, and tension the sync belt.

Camera image is frozen while the machine works normally▼

The camera IP may have been changed or is conflicting, the camera power is off, or the network cable is loose. Check the camera IP, verify power, and tighten the network cable.

Smoke extractor: weak suction and increasing noise▼

The inlet or outlet is blocked, or the filter element is saturated. Power off, open the top cover, clear any blockage, and replace the filter element if suction is still weak.

Smoke extractor powers off by itself right after start▼

Blocked airflow creates excessive filter resistance, so the fan draws too much current and the system protection shuts it down. Clear the blockage, set the airflow knob to minimum, restart, then adjust to normal.

Smoke extractor does not work at all▼

The rear power switch is off, the fuse in the combined switch is blown, or the front knob is not turned on. Check power and the red lamp, and replace the fuse if blown.

Smoke extractor: suction is insufficient▼

The smoke tube is damaged or blocked, or the collection bag is full. Replace the tube, clear blockages, and empty the collection bag.

Chiller is not running (no cooling or pump)▼

Check that the power cable is plugged in, the power switch is on, and the panel power is enabled.

Chiller pump does not work▼

Check the liquid level so the pump can draw fluid, verify the pump motor rotates, and check the circulation circuit for blockages.

Chiller pump suction is weak▼

The voltage may be too low, the tube diameter too small, or the connecting tube kinked. Check voltage and clear any kinks or restrictions.

Chiller is not cooling enough▼

Check that the voltage is not too high or low, ventilation openings are clear, and the ambient temperature is not so high that the compressor briefly stops.

How often should the filters be replaced?▼

Pre-filter: 1-3 months; chiller filter element: 3-6 months; main filter: 6-12 months; gas filter: 6-12 months. Replace when suction drops or per the maintenance schedule.

What is included in the accessory kit?▼

One Omron photoelectric sensor and one electronic relay (wear parts), four drive belts, two SMEMA communication cables, a tool kit (screwdrivers and hex keys), and a chiller filter element.

What air pressure does the machine need?▼

The air pressure must be kept between 0.1-0.2 MPa. It is part of the daily check before production.

Why must the chiller be started before the laser?▼

The chiller must be running before the laser is started, otherwise the laser overheats and triggers an alarm with no laser output.

How often should the ball screws and rails be lubricated?▼

Every 3 months: wipe the screws with a lint-free cloth, clean with WD-40, wipe again, then apply lubricant and move the axes to distribute it.

How should the laser optics be cleaned?▼

Inspect the mirrors and galvanometer monthly. If dirty, use a cotton swab, lint-free cloth or lens tissue with 99.99% alcohol and wipe gently. Never touch optics with bare hands.

Who should perform electrical repairs?▼

Any work involving live measurement must be done by a certified electrician. Before maintenance, power off the machine and be careful around moving parts to avoid injury.

How often should the CCD camera lens be cleaned?▼

Every 3 months. Check for dirt first; if dirty, wipe gently with 99.99% alcohol on a lint-free cloth or cotton swab.

Ready to Master the R6-U?

Contact our engineers for a free evaluation, first reply within 12 working hours (Mon–Sat, 09:00–23:00 China Standard Time, UTC+8) — we will help you plan installation, calibration and operator training.

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How to Operate JHIMS R6-U UV Laser Marking Machine Step-by-Step Video Guide (2026)

How to Operate JHIMS R6-U UV Laser Marking Machine – Step-by-Step Video Guide (2026)

Key Takeaways