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Chinese CO2 laser cutter inconsistence

Hi.

I have a small CO2 (50W) chinese laser cutter and i cut 3mm MDF, but sometimes around every 15-20 days the cutter decrease their power and i can't cut, only engrave. After recalibrate, clean and wait some time, the cutter back to cut normally. I have replaced mirrors and potentiometer, but the same is ocurred time to time.

Few days ago, i noticed that amperemeter what have 0 to 30 mA range, gives their maximum power between 7 and 10mA, other values decreases capacity of cut. Theorically, a value of 30mA would burn MDF, but no laser is present, same as 0mA value.

Can anyone help me, please? Thank you.
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I have found the problem, laser tube is out. I replaced with one new.

Thanks anyway.
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I had a similar problem. Defective tube.
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Busca la garantia o a quien te lo vendio para solucionar el problema
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Sie garantiert?
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Desafortunadamente, los tubos no tienen garantía, pero ya cambié de proveedor. Gracias.
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Yes,friends, happy you got the point. Laser tube power less than 60w life time only have 3 months generally, so it is finished its life so you cant cut correctly. Esay died by the time goes by. 80W or more might live longer. If use a CNC Router,it will be different.
Chencan Machinery,CNC Router manufacture since 1998, skype marylee0411
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(08-12-2016, 02:33 AM)MarryU Wrote: Yes,friends, happy you got the point. Laser tube power less than 60w life time only have 3 months generally, so it is finished its life so you cant cut correctly. Esay died by the time goes by. 80W or more might live longer. If use a CNC Router,it will be different.

I use Laser machine because i work with small pieces, and i work with mm of space between gaps. CNC has that limitation. Also, the burned effect of laser machine is perfect for craft works.

After a few months i love my laser machines!!
Regards.
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