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Need Help! Need desperate help with my "Perfect Laser"!!

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Hi guys!

I'm here to ask for some help in regards to the Chinese laser cutter I have been asked to operate.

We bought the laser last year and had it arrive here in the factory in the first week of January. It is now 5 months later and I haven't cut a single thing out of it.

Since it arrived, cables were not connected properly and the height/sensor controller was broken, then something else was broken, etc. The only communication I have with the company is via email, so our support is very limited. Pretty much me describing the situation, and them translating it to Chinese and the response back to me in English. Pretty much a guessing game for them and daily email communication.

The problem at the moment is...

We had to send the cutting nozzle, the height control box, and another sensor box back to them for repairs. The laser worked at the time. I cut 1 circle out, but the head kept ramming itself into the bed. Something to do with the height control not working, and whenever I set it once, the next time it would just slam down into the sheet!

When the parts arrived back here (after repairs), I installed them back onto the machine. Now the laser path is out and I can't get the laser beam to come out of the nozzle. When i tried cutting the first time, it just burnt the sheet heaps and left lots of burn marks inside the copper nozzle, along with a very hot cutting head! I have been talking to them for 2 weeks now about how to adjust the laser path. I've done all they've asked and nothing seems to be working. I still can't get the laser beam to go through the head. Also, now, the laser power doesn't appear to be on at all, so I'm having trouble even testing it now after taking all the mirrors and lenses out to clean them. Can the laser path really change between me disassembling those 3 parts, not touching the machine for 3 weeks, and installing them back on? The laser path should stay the same right? If no mirrors or lenses have been touched?

I'm only new to this and am trying my best to do what I can, and learning as I go, but I would really like some advice or help from people who have been doing this for a long time, who might be able to help me!!

I can't find anything on Google or here about anyone owning or having problems with this brand! The manual it came with is also no help at all. It only really explains the software and basic set up, but nothing in regards to how to troubleshoot or fix anything. It came with an instruction dvd, but again, that doesn't have much information on it at all that I can use to help me fix these particular problems.

Can anyone help me?? Please??

Thanks!

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