Could someone help with this laser

[Ed Williams]

I purchased a laser head, power supply and cooler from this guy 5 months ago and he keeps telling me he will send the wiring diagram and the rest of the parts I paid for. But it doesn't seem he is going to. Here is a link to one like I got from him. Could someone look at it and tell me if they know anything about it. And what it would be good for.
Thanks Ed

http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT

http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT

[zax15uk]

Ed,

If it's working and has the fiber coupler then you got a good deal.

It shouldn't require anything extra to use it with a fiber optic cable in a metal marking application, or you could use it without the fiber if you have a focusing lens.

I can't help with the wiring diagram, as I haven't seen this exact type but it should be fairly straightforward.

Zax.

[wktina]

sorry,can't help.if you try to write him email?
may he is busy with Christmas Day,he has a good reputation,it should be ok

[Ed Williams]

Thanks for the reply. Would anyone know what current this will draw? So I would know what amperage to wire. It is a 150w YAG and where would be a place to get a good head with air assist.

[zax15uk]

Ed,

It shouldn't be more than 3A@220V (in truth it's most likely under 2A).

Hang on... are you talking from the PSU to the Laser head, if so it's going to need MUCH higher current capacity. Just guessing here, as I don't know what the driver voltage is, but probably 18V so it will require at least 15A and I would probably go with 30A (12 or 14AWG should be sufficient).

Zax.

[Ed Williams]

I whish someone knew for sure. The guy I purchased it from told me 60amps needed for power supply. I didn't think that was right.

[zax15uk]

After looking at the ebay item again, I correct what I previously said.

It looks like an older unit (I was thinking it had a solid state head), so the operating voltage is much *much* higher.

The power wouldn't change though, so I don't see where 60A could come from unless it's extremely inefficient.

Zax.

[andyamp]

Hi, this laser looks to me to be a lamp pumped ND YAG .
typical efficiency is at best 5% and most likely 4% it will have a Krypton Arc lamp and will need 40-60 amps and 90-110volts to operate at full output power.
(lamp power)
so 60 amps at full power on 110 volts is about correct. (mains input)
PS this type of laser is not EYE safe even reflected radiation will destroy The retina.
be safe

[zax15uk]

4-5% efficiency, wow!

In that case, as you said the 60A makes sense.

Zax.

[andyamp]

i have a laser head here that needs 20 KW to run it if you get in front of this type of laser

[Ed Williams]

60 amps at full power on 110 volts. The Power supply is 220v single phase. Will it still need this kind of power. Is this capable of cutting aluminum or what is it best suited for. And what are some of the precaution that I should take.
Thanks Ed

[andyamp]

looks like a medical laser.
30 amps at 220v likely power.
aluminum baking foil and that will be its limit.
150watts is not enough power to cut metals from lamp pumped yag laser.
also if you get a fiber optic for it you will have difficulty getting a small spot size.
typically 0.6mm spot size,it is possible to get 0.3mm fiber,but i don't know if it is available for this type of laser.
1.064 microns is very dangerous to the eyes.
co2 lasers are much safer to mess about with.