Rust removal laser

[javanam]

I have seen these videos for removing rust with laser
https://www.youtube.com/watch?v=ACGSzBXKONo
https://www.youtube.com/watch?v=Q8q3DZB_l6M

What laser is this and what type is the head ?
Is 1 axis galvo with f theta lens 1064nm ?
Power is 1kw can i do a similar thing with 1x200w diode ir laser or more 200w diode lasers combined ?

[VDX]

... for 1-axis only its mostly a rotating polygon-mirror.

I've tried with a 20W-fiberlaser and XY-galvos, what's working too, but much, much slower:

https://www.youtube.com/watch?v=jHuAJqIUzo8

https://www.youtube.com/watch?v=jiSu2ivPL_A


Have to try with a 270W@975nm-diode ...

Viktor

[kecked]

... for 1-axis only its mostly a rotating polygon-mirror.

I've tried with a 20W-fiberlaser and XY-galvos, what's working too, but much, much slower:

https://www.youtube.com/watch?v=jHuAJqIUzo8

https://www.youtube.com/watch?v=jiSu2ivPL_A


Have to try with a 270W@975nm-diode ...

Viktor

pretty sure I saw rust removal using a pulsed/q switched 355nm Uv laser.

[macona]

I think all the systems use IR, there is no sense loosing power by frequency tripling. They just use really big q-switched fiber lasers. I dont think a 970nm laser will do much, you need the peak power to blast away the rust and other debris.

[VDX]

... I dont think a 970nm laser will do much, you need the peak power to blast away the rust and other debris.

... you didn't have seen my 975nm working! -- here its with roughly 190W othe max 270W (or up to 500W with short pulses!) burning away the nickel of a nickel-coates iron sheet

https://www.youtube.com/watch?v=cRvRO6Q5dH0


Attached the results of some "short", "medium" and "longer" pulses ... if adjusting PWM and power and using shielding gas, then some "cleaning" won't be a problem

Viktor

[rns0504]

We sell a good volume of dual axis scanners into this application. Typically beams of around 10mm at the mirrors, 1064nm. Sometimes 16mm mirrors too, also 1064nm.

[macona]

I still think you want even shorter pulses and higher peak power than what you have.

[kecked]

I still think you want even shorter pulses and higher peak power than what you have.

websearch rust removal 355nm. It’s a a switched job with rather high peak. There is video as well. Not sure but seems like the power and speed of the pulse means more than the wavelength. Maybe it’s a physical shock thing that makes the rust delaminate from the surface?

bingo…ablation.

https://manufacturingtoday.org/proce...-rust-removal/

[javanam]

From what material can i make a polygon mirror that reflects 1064nm 1030nm and 980nm?

With a polygon mirror that rotates by a small motor with configurable rpm f-theta lens and air suction is enough for making a rust removal gun ?

[kecked]

If all you want to do is draw a line use a cylinder lens. If you want to sweep the actual spot use galvos. Even cheap ones but your mirror better be up to it. Those high power pulses can rip mirrors up fast.

honestly I don’t think this is the best method for amateur use. Try Pepsi and elbow grease.