威廉希尔官方下载

Solutions and routine maintenance of common faults of CO2 laser marking machine

Jan 06, 2020

威廉希尔官方下载1. Reasons for failing to reach the expected marking depth:

① Whether the laser output power meets the requirements;

② Whether the adjustment of the light path is accurate;

③ Whether the position and direction adjustment of the beam expander is accurate;

④ Whether the lens surface is polluted;

⑤ Whether the surface of the workpiece is on the focal plane;

⑥ Whether the laser power output DC 28V voltage drops, which causes the laser output power to decrease.


威廉希尔官方下载2. D / A shows several main problems:

① There is no light signal (5V) on the 8th pin, resulting in no laser output from the laser

② The analog signal output cannot accurately reflect the design content, that is, garbled characters appear;

③AD7237 works abnormally, and the phenomenon shown is that the printed lines are dotted lines.

④ No signal (0-10V) on pin 18 causes no laser output from the laser.


威廉希尔官方下载3. Several main problems exhibited by galvanometer scanning heads:

① Standard square is printed as trapezoid or rhombus;

②Pin-shaped or barrel-shaped deformation occurs in the square frame.


4.Solving method of galvanometer scanning head print distortion:

① The generation of pincushion or barrel distortion is an inherent phenomenon of galvanometer marking, which is determined by the scanning mode of the galvanometer. The solution is to correct the signal by distortion;

② There are two methods of calibration. One is hardware calibration, which is currently used less frequently. The other is software correction, which is the one we use more now;

③ The method of hardware correction is to pass the analog signal output by the D / A card through a correction card to change its voltage value according to a certain rule, and then transmit the signal to the lens;

④The method of software calibration is that the marking software comes with a calibration function. During the marking process, the digital signal is processed according to a certain method, and then the signal is transmitted to the D / A card.


威廉希尔官方下载5. The laser printing line is broken line: solve the signal interference problem of laser marking machine

① Whether the signal line is connected well and whether there is any false soldering;

② Is there any problem with the connection line between the lens drive board and the motor?

③Whether the D / A card is in the correct position when inserted into the ISA slot;

④ Does the AD7237 work normally?


6. Beam expander adjustment issues:

① The adjustment requirements of the beam expander: the incident light should be at the center of the light entrance hole of the beam expander and the outgoing light should be at the center of the light exit hole;

② The adjustment of the beam expander has a great influence on the laser marking effect.


Mainly manifested in:

a. Laser power decreases;

b. The laser intensity is not uniform in the marking format;

c. The computer software design center deviates from the physical center of the light output of the galvanometer lens;

d. Can not play beam expansion effect.


7. PROLASE software needs to pay attention to the issues:

① Pay attention to printer settings when converting dwg files to plt files;

② The size of the graphic after calling should be adjusted again;

③ 威廉希尔官方下载e a fixed ratio for zooming in and out to avoid design graphics.


Daily maintenance and precautions:

The machine should be placed in a well-ventilated, clean and bright place. In order to ensure good ventilation, the distance between the machine and walls and other obstacles must be at least 0.6m.


After the machine is positioned, the shockproof feet need to be adjusted according to the ground conditions, so that the table top of the equipment is in smooth contact with the ground and is horizontal. The working conditions of the machine are as follows:


Environmental conditions: Working temperature: 10 ~ 30oC Relative humidity: <70%

Power supply conditions: single-phase two-wire, 220VAC, 10KVA

The installation site should have a ground point with a grounding resistance <4 to ensure the safety of the equipment.

The processing place should be equipped with smoking exhaust duct equipment to remove smoke and exhaust gas generated during work.


Precautions when maintaining the machine:

1. When installing and replacing the work place, pay attention to the phase sequence of the power supply to make the pump work normally.

2. When the machine is not working, close the work cabin door to prevent dust from entering the laser.

3. The circuit is in a high voltage state when the machine is working. Non-professionals, please do not stop by the way to prevent electric shock.

4. If the machine fails (such as water leakage, power pull, fuse burning, abnormal laser noise, etc.), operators should immediately connect the emergency stop button and cut off the power.

5. Circulating water with appropriate temperature must be connected when working continuously.

6. The internal circulating cooling water needs to be replaced once every 3 to 6 months depending on the water quality.

威廉希尔官方下载7. Drain the internal cooling water in winter or for a long time without using the equipment. The water temperature must be above 0 ° C.

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