X700 laser not firing

[lasernoob123]

Hi all,

I've been using an X700 for a while now but today when I turned on the unit the fuse for the power supply input popped immediately. I believe the proper fuse is a 5A/250v but I'm not 100% We then went to get a replacement and it popped 2 5A 250V fuses again. We then tried an 8A 250v fuse and it turned on and is functioning as normal. Except that the laser tube is not firing under any condition. I messed with all the settings and checked that there were no abnormalities with the boards or internal power supply. Could it be that we need a 15A fuse? The one we pulled looked like it said 5A. If it is a 5A what could be causing the circuit to overload immediately?

Thanks!

[Tech_Marco]

You need to tell "what" is in your system like the power of the tube and the power supply. Water chilling rating and/or other equipment attached to the socket. Simply telling the model # alone won't help as no one is really know what "X700" is. Same machine from different companies can has different model number!


Marco

[lasernoob123]

Sorry about that. It's a Redsail X700. It's a 50W laser tube and a 50W supply.

[Tech_Marco]

Could you please post pictures of your machine? I need to see the laser tube, power supply, and/or drivers


Marco

[lasernoob123]

Hi Marco,

Apologies for the poor picture quality. I can take better ones if needed.

[Tech_Marco]

Sorry to reply late.

If it is a "50W" (not a common tube or PS!), a 5A fuse is more than you need. You shouldn't use anything higher than 5A! FIY, laser is having 10% efficiency, so a 50W laser may consume up to 500W power. If you're running AC200V, then the current is running about 2.5A. 5A is big enough to cover the surge when first power up. By replacing it with a 8A, you're trying to "hide" the problem that could lead to burning on internal circuitry. I think your PSU already 'cooked'.


Marco