Hello all,
We have a Chinese G.Weike LC1490 with
- a Z6 RECI lasertube
- a CW5000 chiller system
- a 150W power supply
We have been using it since February of 2014 (it is a new system).
Mostly cutting MDF of 3mm and it worked flawlessly (at speed 30 and power 60)
However since two weeks we are unable to cut anything reliably.
Symptoms:
1. It just doesn't cut through anymore.
Speeding down does not help, increasing power does not help.
Also when pressing 'laser' I have the feeling that it is less powerful than before.
2. The strange thing is that if we use the 'cut contour' option on the control pad, most of the time it cuts the square perfectly. With this info we found out that if we put the power at 30, that we can get a somewhat clean cut. If we go to 35 or over, it doesn't work anymore.
3. Also the power of the cut varies during a cut (sometimes)
As you see in the image, it started cutting at a certain power, but when it reached the location of the cursor the power of the cut decreased drastically (and the ampere output meter on the machine went up at the same time). This behavior never happens when we use the 'cut contour' option on the control pad.
image.jpg
The steps we took in order to correct it:
* checked the tube for cracks
* checked the connections of the tube for bad contacts
* checked and realigned the mirrors
* used a higher pressure air blower
* changed the focusing lens (tried cutting at different offsets)
* tested the chiller (the alarm goes of if the flow is interrupted)
* tested the power supply (disconnect the data cable and press the button / we haven't tested it yet with the supplied resistance)
* used the same sheet of material we could cut before
We contacted Weike but so far no response.
We have a spare tube we could install, but i would not like to blow the new tube if it is a problem in another system (power supply ?).
Does anybody have any ideas on how to resolve this issue ?
Is it just the tube ?
Any suggestions would be most welcome.