Marking Head (STRM)

Marking Head (STRM)

Keywords: marking head, mark head, scanner, laser scanner, 3D, 2D

STRM series precision optical scanning system is a totally digital 2D galvanometer system. Embedded control system guaranteed the servo loop operation. It is compact, stable and cost-efficiency.

2D Marking Heads

Part numberMax. entrance dia. mmControlDC power supply, VDimension LxWxH,mm
LSRM-xxxx-10-A1010XY2-10015114x97x94
LSRM-xxxx-10-Q1010XY2-10015114x97x94
LSRM-xxxx-12-Q1212XY2-10015114x97x94
LSRM-xxxx-14-Q1414XY2-10015134x109x107
LSRM-xxxx-20-Q2020XY2-10015170x150x140
LSRM-xxxx-30-Q3030XY2-10015195x150x165
LSRM-xxxx-50-Q5050XY2-10015246x202x168

3D Marking Heads

Part numberMax entrance dia. mmControlDC power supply, VDimension
LxWxH,mm
LSRM-1064-6-QPT6XY2-10015254x97x105
LSRM-1064-7.2-QPT7.2XY2-10015254x97x105
LSRM-1064-8.4-QPT8.4XY2-10015254x97x105
LSRM-532-3.3-QPT3.3XY2-10015274x109x116
LSRM-532-4-QPT4XY2-10015274x109x116
LSRM-532-4.6-QPT4.6XY2-10015274x109x116
LSRM-xxxx-QP20XY2-10015350x140x188
LSRM-xxxx-QP30XY2-10015400x155x194

2D Marking Heads (Scanheads)

1. LSRM-A10 Series 2D Marking Heads

LSRM-A Series is a totally digital 2D galvanometer system. Embedded control system guaranteed the servo loop operation. It is compact, stable and cost-efficient. It is the basic version of LSRM series scanheads. Mirrors of general wavelengths are available, like 1064nm, 532nm 355nm, 10.6um, suitable for laser marking, microscope, drilling, trimming and cutting etc.

Part numberLSRM-xxxx-10-A10
Aperture10mm
Beam displacement13mm
Tracking error time220us
Offset drift75urad/K
Gain drift200ppm/K
Step response time
1% of full scale0.3ms
10% of full scale0.8ms
Marking speed (1)2m/s
Positioning speed12m/s
Writting speed (2)
Good quality500cps
High quality450cps
Repeatability< 22urad
Drift over 8 hours (After 30min warm-up)< 0.3mrad
Typical scan angle40 degrees
Interface (3)XY2-100 Enhanced
Operating temperature25°C±10°
Power requirements±15V DC, 150W
Driver modeDigital
Resolution16Bit
Max laser power (4)100W
Dimenion114x97x94mm
(1) with F-Theta objective, f=160mm
(2) single-stroke characters of 1mm height
(3) XY2-100 Enhanced with status feedback
(4) The mirror of 1064nm can stand max laser power

2. STRM-Q 10/12/14 2D Marking Heads

LSRM-Q series is totally digital 2D galvanometer system. System operates based on the embedded platform. It is compact, stable and high quality. More fast and accuracy. The offset drift and gain drift are very low. Mirrors of typical laser wavelengths are available and optimized for inertial and stiffness. Suitable for high end application like ITO scratching, laser micro processing etc.

LSRM-7-Q10LSRM-12-Q12LSRM-10-Q14
Aperture10mm12mm14mm
Beam displacement13mm14.5mm18.1mm
Tracking error time130us160us160us
Offset drift30urad/K30urad/K30urad/K
Gain drift50ppm/K50ppm/K50ppm/K
Step response time
1% of full scale0.3ms0.3ms0.5ms
10% of full scale0.8ms0.8ms1ms
Marking speed (1)2.5m/s2m/s2m/s
Positioning speed15m/s11m/s8m/s
Writting speed (2)
Good quality800cps660cps660cps
High quality500cps410cps410cps
Repeatability< 15urad< 15urad< 15urad
Drift over 8 hours (After 30min warm-up)< 0.1mrad< 0.1mrad< 0.1mrad
Typical scan angle40 degrees40 degrees40 degrees
Interface (3)XY2-100 EnhancedXY2-100 EnhancedXY2-100 Enhanced
Operating temperature25°C±10°25°C±10°25°C±10°
Power requirements±15V DC, 150W±15V DC, 150W±15V DC, 150W
Driver modeDigitalDigitalDigital
Resolution16Bit16Bit16Bit
Max laser power (4)100W100W100W
Dimension114x97x94mm114x97x94mm134x109x107mm
(1) with F-Theta objective, f=160mm
(2) single-stroke characters of 1mm height
(3) XY2-100 Enhanced with status feedback
(4) The mirror of 1064nm can stand max laser power

3. LSRM-Q20/30 2D Marking Heads

LSRM-Q series is totally digital 2D galvanometer system. System operates based on the embedded platform. It is compact, stable and high quality. More fast and accuracy. The offset drift and gain drift are very low. Mirrors of typical laser wavelengths are available and optimized for inertial and stiffness. Suitable for high end application like ITO scratching, laser micro processing etc. Added water and air cooling function to improve the stability of the system.

(All angles are in optical degrees)

LSRM-20-Q20LSRM-30-Q30
Aperture20mm30mm
Beam displacement26.5mm36.5mm
Tracking error time360us550us
Offset drift30urad/K30urad/K
Gain drift50ppm/K50ppm/K
Marking speed1m/s0.7m/s
Positioning speed6m/s3m/s
Writing speed
Good quality (1)320cps220cps
High quality (2)210cps150cps
Repeatability<15urad< 15urad
Drift over 8 hours< 0.1mrad< 0.1mrad
(After 30min warm-up)  Typical scan angle40 degrees40 degrees
InterfaceXY2-100 EnhancedXY2-100 Enhanced
Operating temperature25°±10°25°±10°
Power requirements±15V DC, 150W±15V DC, 150W
Driver modeDigitalDigital
Resolution16Bit16Bit
Max laser power (3)1000W5000W
Dimension170x140x130mm195x150x165mm
(1) with F-Theta objective, f=160mm
(2) single-stroke characters of 1mm height
(3) The mirror of 1064nm can stand max laser power in air cooling

3D Marking Heads (Scanheads)

Part numberMax entrance dia. mmControlDC power supply, VDimension
LxWxH,mm
LSRM-1064-6-QPT6XY2-10015254x97x105
LSRM-1064-7.2-QPT7.2XY2-10015254x97x105
LSRM-1064-8.4-QPT8.4XY2-10015254x97x105
LSRM-532-3.3-QPT3.3XY2-10015274x109x116
LSRM-532-4-QPT4XY2-10015274x109x116
LSRM-532-4.6-QPT4.6XY2-10015274x109x116
LSRM-xxxx-QP20XY2-10015350x140x188
LSRM-xxxx-QP30XY2-10015400x155x194

1. LSRM-QPT: 3D Post-Scanning Solution

(Refer to LSRM-Q datasheets for 2D marking heads)

This solution includes a 2D galvoscanner system LSRM-Q Series, a dynamic focusing unit Proton Series, F-theta lens and a galvo system controller LSRM-UMC4. It uses the post-objective scanning technology, the working volume is about 150*150*45 with the FL 210mm F-theta lens. The advantages are fast marking speed, small focal spot and low power loss.

Laser typeNd:YAGNd:YAG doubled
Wavelength1064nm532nm
Beam expansion factor1.673
Input aperture6mm/7.2mm/8.4mm3.3mm/4mm/4.6mm
Scan head apertures10/12/14mm10/12/14mm
Focus range in Z-direction±22.5mm (1)±2.5mm (2)
Tracking error time700us700us
Dimension254x97x105mm274x109x116mm
Remarkds: (1) The focal length of the f-theta lens is 210mm; (2) The focal length of the f-theta lens is 100mm. All the above parameters are theoretical.

2. LSRM-QP20/30: 3D Pre-Scanning Solution

(Refer to LSRM-Q10/12/14 datasheet for 2D marking heads)

LSRM-QP20/30: 3D Pre-Scanning Solution includes a 2D galvoscanner system LSRM-Q, a dynamic focus unit Proton series, and a galvo system controller LSRM-UMC4. It uses the Pre-Objective Scanning technology to realize the large field and 3D laser application. The advantage of this system: fast, small focal spot, small power loss.

CO2 laser configuration example: LSRM-QP30

Scanning field600x600mm800x800mm
Focal spot diameter364um487um
Working distance502mm777mm
Resolution9um12um

Nd:YAG laser configuration example: (λ=1064nm) LSRM-QP20/30

Scanning field400x400mm600x600mm800x800mm
Focal spot diameter
QP-2034um52um
QP-30-36um48um
Working distance
QP-20502mm777mm
QP-30-777mm1051mm
Resolution6um9um12um

UV laser configuration example: LSRM-Q14 + Proton

Scanning field400x400mm600x600mm
Focal spot diameter17um26um
Working distance520mm795mm
Resolution6um9um
  • All of the above parameters are theoretical values.

  • Distance between edge of deflection unit and working surface. This distance is dependent on the product model and will vary with laser pergence and objective tolerance.

  • Actual spot size and writing speed are dependent on material and application.

STRM-CA: CCD Adapter

Traditional galvo scanner correction method is given priority to the manual measurement, accuracy is difficult to be guaranteed, thus affecting the processing quality. Galvo scanner with a camera adapter vision module can greatly improve the accuracy of the calibration, and monitor work surfaces at the same time.

Installation:

The camera adapter is mounted between the scan head’s beam entrance and the laser flange. (see Fig 1).

Working Principle:

Illumination light reflected from the surface of the workpiece pass through achromatic F-theta, galvo scanner, beam splitter, CCD lens to reach the CCD sensor. Adjust beam splitter position to compensate the error of machining and assembly to ensure the optical path of the laser and reflected light coaxial. Make the laser coincides with the CCD image detection point.

Field of View (FOV):

Field of view is decided by the lens focal length, CCD camera, CCD camera photosensitive element size together. For example, 160mm lens, CCD target surface size of ½ ", the field of view is 10.4mm * 8.3mm (see table)

Laser wavelength1064nm532nm
Pilot laser wavelength635nm635nm
Diameter of entering beam14mm10mm
Scan head mirror coating1064nm + 635nm532nm + 635nm
Processing field size100 x 10 0mm100 x 100mm
Observation wavelength1064nm / 635nm532nm / 635nm
Focal length camera objective102mm102mm
Flat field objective160mm210mm254mm163mm
Observation field size10.4x8.3mm13.7x10.9mm16.6x13.3mm10.6 x 8.5mm

Other Parameters:

Diameter of entering beam14mm
Operating temperature25℃ ±10℃
Max. Chip size95 %
Camera Connection type≥1/2″
Weight(without camera)C-mount
Laser transmissivity≈2.6 K g
Outline dimension115x112x215mm

Coaxial CCD adapter tuning method and steps:

  1. Adjust the galvanometer height, find the galvanometer focus position.

  2. Mark the crosshair.

  3. Adjust the focus ring 4 (CW or CCW), to the camera showing a clear image.

  4. Locking screw 5 to lock the focus ring 4.

  5. Loosen screw 7, CW or CCW adjusting ring 6, to make the orientation of the image the same as the crosshairs.

  6. Lock screw 7.

  7. Observe the CCD image crosshair and the marked crosshair position. If the two crosshair does not coincide with each other need to open the protective cover, tuning the knob 2 and knob 3. Take ② (see Figure 1) as an example, when the knob 2 is adjusted, the centre of the image will move left and right diagonally. When the knob 3 is adjusted, the centre of the image will move up and down diagonally .Tuning knob 2 and 3 to make the image crosshair coincide with the marked crosshair.

  8. After tuning restore the cover.

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