Quote Originally Posted by willy1067 View Post
do I need a converter, if I do how much watts (300, 500, 800, 1000 or bigger)
Yes, you need a 110v 60Hz to 240v 50 Hz converter. Do a google search you will find hundreds. The Hz is not that important in the case of a laser as the motion is controlled by internal power supplies and line frequency should not be an issue.

If there is a nameplate on the Omni and it shows Watts then that's what you need in a converter. If it shows Amps then you need to double that for a converter. Halve the voltage, double the Amps for the same Watts.

If the vacuum pump is not plugged into the Omni for it's power then you need to add those Amps to the Omni Amps for a total. e.g. Omni = 240v x 5A = 1200W Vacuum pump 240v x 3A = 720W. The converter needs to be able to run 1920 Watts. So 1920 / 110v = 17.5A which is more than a 110v househould wall outlet should provide.

I think you should consult an electrician. Either that or make sure the Fire Department has your correct location.