Can we use this laser without power? I want to know more about this project. Currently I'm working for the laser light project, you can see here the details https://laserjudge.com/best-laser-level-for-homeowner/

That controller you posted a picture looked like a sad, sad shell of a controller. Was it USB?

I bought a laser cutter that looks just like that from China through Full Spectrum Laser:

http://mattikariluoma.com/?p=320

My model had a parallel port, so emc2 + inkscape worked fantastic (on a p4!).

More pictures of someone else's: http://moderndevice.com/news/full-spectrum-engineering-40w-hobby-laser/

(I also left mine out in a cold place and broke a tube!)

Yeah, the originally controller is USB.
I think Full Spectrum buys them to modify and resale. I've seen a couple of different companies do that. The first thing most anybody does is tear out the Moshidraw board and replace it with something else. I've actually not powered on the Moshi board or used their software. After the Lenovo thing this past month I'm not too keen on installing anything software that was provided with the laser.