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HPC CO2 Laser intermittently making strange noises when firing, power curve weird
Hey all,
We've got a HPC laser cutter here at rlab, and it's making strange noises on firing sometimes.
I've got a video of it. I thought it might be a discharge somewhere but I can't see anything:
http://www.youtube.com/watch?v=YKxe0sS-ZMg
Also, the peak power seems to be at a tube current of ~ 13 mA, and although there's never been good data about it, I'm quite sure that it peaked at a higher current than that previously.
We've ordered a spare tube, as we're running a workshop on the beast this weekend, but I'm a bit perplexed about what could cause this behaviour...any ideas anyone?
Thanky!
ryan@rlab.org.uk
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That is from the power supply. You are hearing the power control. If anything I would have a spare power supply. They are only made so-so.
Do not keep spare tubes on hand. They have a limited shelf life. I have a 40 war tube and sitting on the shelf for a year it was down to 27 watts. My guess is helium migration through the soft seals.
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