Precautions against laser engraving machine

[techfortun]

precautions against laser engraving machine operation

1. no earth connection permitted during machine working. the earth wire of laser power should be connected to the earth, doors windows or water tube facilities are not allowed to be connected. the earth wire should be connected to the outside ground.

2. please check if the water pump run water or not and if the laser tube is full of water. water run out from the water pump or not enough water in the laser tube is not allowed when machine is working.

3. the water container should be larger to promise the circulating water is around 20kg. the water temperature should be below 25 degree centigrade, the circulating water should be replaced when the water temperature is very high. it is better to use purified water as circulating water, which should be promised clean and replaced every four days.

4. the reflector and focus lamp should be wiped by special camera lens paper or medical cotton buds dipped alcohol and anther. (mixing ratio is 1:1), please keep clean once a week.

5. the blower should be opened when engraving, in case pollute the lens and focus lamp.

6. the laser water tube should be running out in winter, in case the laser tube frost crack.

7. this laser light is invisible light, flammable materials and explosive goods are prohibited to be put nearby the machine, in case the laser deviation result in fire breaking out.

8. the operator leaving is not allowed during machine working, in case unnecessary losses happen.

9. open the machine by laypeople is prohibited, because there are laser and high pressure inside the machine.

10. any irrelevant total reflection or diffuse reflection goods put in the machine are not allowed, in case the laser light is reflected to people or flammable materials.

11. opening machine is prohibited under unstable pressure, or else, voltage regulator should be used.

12. operator not be trained is prohibited to operating the machine.

daily maintenance
the horizontal type machine light path is complicated, in order to make sure the light can pass through each lens and keep the max laser light power, light adjusting can improve the engraving efficiency. there are following methods to adjust the light path.

1. wipe the lens
the reflector and the focus lamp are consumables. if the maintenance is not in time, the dust from engraving will erosion the coating of lens, if the coating of lens broke, the lens cannot reflect the light fully and will be absorbed the heat by engraving, which will impact thelaser engraving effect and lens, broke. the following is the lens maintenance.

a) please look into the reflector surface golden film, which should be average color, if have any spots, please wipe softly by the absolute ethyl alcohol cotton buds to clean, if any broke in the golden film, please replace it.

b) screwing out the focus lens cap and take out the lens, if any spot on it, please wipe it by absolute ethyl alcohol cotton buds.

2.adjust the light path

(1) put the focus lamp on the top left corner, make the forth reflector aperture face to the third reflector, as follows figture1.
(2) look into the forth reflector incidence point, the deviation of the incidence point is adjusted through up and down ,left and right screws on the back of the first reflector.
(3) put the focus lamp to the top right corner and bottom left corner like figure 2 and 3, the second reflector deviation is adjusted through its own screws on the back of the reflector, the third reflector deviation is adjusted through the screws on the back of the reflector.
(4) put the lens to the position 4, bottom right corner, after checking no deviation, the adjustment is done, or else, adjust again by 1,2,3 positions.

[kewlkiwi]

'anther' = ether ?

Bob

[Litografa]

focus lamp = focus lens?

[fantasy2]

1. no earth connection permitted during machine working. the earth wire of laser power should be connected to the earth, doors windows or water tube facilities are not allowed to be connected. the earth wire should be connected to the outside ground.


Why not? On my machine, all the doors and everything is grounded to earth..

[zax15uk]

fantasy2, I think you misunderstood the post. techfortun was saying the laser machine should be connected directly to a ground (earth) point, and not to a water pipe or other metal frame (such as door/windor) as these do not provide a suitable low resistance path to ground.

I don't necessarily agree, as in some countries a water pipe is an excellent ground, and possibly better than the electrical system.

Zax.

[fantasy2]

Well, I'm well aware that everything should be connected to earth. Here, we cannot connect them to radiators of the central heating or to water pipes because that's not allowed anymore. If something happens and someone already was touching the radiator he gets a shock and besides most water pipes that go into the ground are non-metal(not the ones of the central heating of course).


Hmm, now I read the post again(in a different way) you're right.. But I would write it a little bit more clear.

[MyCattMaxx]

You can tell by the why he writes that English is not his native language.
I think that was supposed to be Laser 101 for dummies.
May be the legal disclaimer for his products. But good luck suing a chinese company.

[fantasy2]

lol, that's a bit too far but ok.