Opt Lasers GRAV PLH3D-15W Series User manual

Copyright © 2020 by Tomorrow's Sys tem Sp. z o.o. Al l Rights Res erved.
Product User Manuals
PLH3D-15W Engraving Laser Head - User's
Manual
Contact and Shipping: Company Information:
Tomorrow's System Sp. z o.o. Tomorrow's System Sp. z o.o.
Okulickiego 7/9 hala G39 Pułaskiego 125/35
05-500 Piaseczno 15-337 Białystok
Poland Poland
tel.: [phone] NIP: PL5423238556
e-mail:
[e-mail]
REGON: 200866868

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Technical Specifications
Item Typical Value Comments
Optical Power 15 W TAmbient = 25°C
Center Wavelength 445 nm
Working Distance 4 mm (0.157") Distance from the tip of air nozzle
Beam Spot Width 180 µm (0.007")
Dimensions 40 x 54 x 86.5 mm
(1.6" x 1.7" x 3.4") (L x W x H), with nozzle attached
Mounting Hole Pattern 77 x 68 mm (30" x 2.7") M3 (#4-40) or M4 (#8-32)
recommended
Weight 790 g (27.8 oz)
PSU Voltage 22 - 24 VDC
Power Consumption <85 W
Modulation Input 1 0 - 5 V Analog / PWM / TTL
Modulation Input 210-3 V, 0-5 V, 0-10 V, 0-24 V PWM / TTL
Max. Mod. Bandwidth 30 kHz Recommended: 5 - 10 kHz
Operating Temperature 10°C to 45°C
(50 - 113°F)
Air Nozzle Hose Size
Standard 4 mm (5/32")
Max. Air Pressure 5 bar (72 PSI)
1“Laser Off” state is < 2 V. “Laser On” state is 3 – 24 V.

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Dimensions and Pinout

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Electrical Information
Important: PLH3D-15W-Series engraving laser head should be powered with a high-quality power supply without
anything else connected. Please note: connecting the laser head to the same power supply unit as a stepper motor
or any other high-impedance equipment is not recommended. Doing so may cause irreversible damage to laser
diodes.
Important: Do not connect both Modulation Input #1 and Modulation Input #2 at the same time. Doing so may
result in the malfunction of the laser head.
Modulation Functionality
Engraving Laser Head Modulation Input 1 Modulation Input 2
PLH3D-15W Series 0 – 5 V Analog Signal
0 – 5 V TTL/PWM Signal
0 – 5 V TTL/PWM Signal
0 – 10 V TTL/PWM Signal
0 – 24 V TTL/PWM Signal
Modulation Input #1:
Modulation Input #1 accepts Analog, Pulse-Width Modulation (PWM) and Transistor-Transistor Logic (TTL)
signals. The operating range of Modulation Input 1 is 0 – 5 V. If it is connected to a signal with a slightly higher
voltage, e.g., 0 – 10 V, only the 0 – 5 V portion of the signal will affect the laser output power. The voltage
connected to this input should never exceed 10 V.
Modulation Input #2:
Modulation Input #2 accepts PWM or TTL signals. Examples of compatible control signal ranges are: 0 – 5 V, 0 –
10 V and 0 – 24 V. For control via PWM, we recommend using a base frequency of 5,000 – 10,000 Hz. While
frequencies such as 1,000 Hz can also work, higher frequencies typically produce better grayscale images. Duty
cycle % will correspond to the optical output power %.
Specification of Modulation Input #2 are following:
Parameter Test condition
@ Ta = 25°C
Min.
Voltage
Typ.
Voltage
Max.
Voltage
Units
High level input
voltage
Vcc = 12 V
Vcc = 24 V
2.5 - - V
Low level input
voltage
Vcc = 12 V
Vcc = 24 v
- - 1.0 V

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Maintenance
1. Nozzle Removal
For cutting materials thicker than 3.5 mm the air nozzle should be removed. To remove the air
nozzle, unscrew it as shown in the images below.
Important: Never unscrew or loosen the screws shown in the image below. The part that they
are holding is factory aligned.
2. Air Nozzle Connection
High pressure nozzle can be connected via a 4 mm (5/32") hose. The hose is meant to be guided
through the hole at the back of the laser head. It is important that you ensure the nozzle has got
a fresh air supply.

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3. Cleaning the Lens
We recommend regular inspections of the lens surface cleanliness before laser processing
operations. The front surface of the lens is easy to clean in case it has become dirty during your
recent engraving or cutting operations. The cleaning procedure can be carried out with Isopropyl
Alcohol (IPA) and an optical wipe. You can watch an appropriate cleaning technique on our
Youtube channel.