Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

Power Supply for a 15W CO2 Laser?






phenol

phenol

0
Joined
Oct 30, 2007
Messages
533
Points
18
the circuit ''behind'' the green connector is skewing your results. if you want to measure the true resistance of the pot, you have to disconnect it from the power supply.

then again, why would you want to measure it when you already know it? you ought to trust your new pot! :)
 
MrDelsic

MrDelsic

0
Joined
Oct 8, 2012
Messages
40
Points
0
I figured, just like to double check- especially with high power/high cost/fragile devices :) Off to the store to get some distilled water for the cooling system, with any luck she'll be up and opperating tonight! :D
 
MrDelsic

MrDelsic

0
Joined
Oct 8, 2012
Messages
40
Points
0
So, I managed to get to the lab today to test it out. Ended up frying my fuse on the 110-220v transformer. Luckily, there was one at the lab I could use. I hooked it up and wasn't getting anything from the laser. My ammeter would occasionally read 0-1mA, but even turning the pot all the way to let the full 5v flow, I didn't get anything. I wired the pins exactly as Phenol's picture showed, my HV+ is going the the back of the laser (which I assume is the anode) and the front of the laser goes to my ammeter, then to my ground. Anyone have some suggestions?
 
T

Things

0
Joined
May 1, 2007
Messages
7,517
Points
0
I know in the USA, the 2 pin power plugs are pretty damn common, make sure you actually have a solid ground connection, either into your Mains or to something like a pipe in the ground if you don't have a Mains ground.
 
Last edited:
phenol

phenol

0
Joined
Oct 30, 2007
Messages
533
Points
18
your power supply has a fuse, is it blown?...
does the mains xformer you are using actually work after the fuse blow?
did you get a description of your power supply with the exact connector pinouts?
check if pin6 of the green connector is actually putting out 5v referenced to pin 4.
i truly hope it's not the case, but if your tube is up to air, chances are that it will never fire.
 
T

Things

0
Joined
May 1, 2007
Messages
7,517
Points
0
And their PSU's really don't like running open circuit due to the huge voltage potential they generate without a load. Could have arced over to the mainboard and thus why a fuse popped. Have you got pics of the tube?
 
Last edited:
MrDelsic

MrDelsic

0
Joined
Oct 8, 2012
Messages
40
Points
0
It's not the tube- I borrowed a friend's hene psu and it worked (not ideal, but the beam turned on). Could be a blown fuse on my psu... I'll try and find some time to go back to the lab soon and check it. Pinout actually was labeled (just had to find the right viewing angle). Phenol's pinout matched what was labeled
 
DashApple

DashApple

0
Joined
Jan 14, 2009
Messages
1,452
Points
83
Things said:
And their PSU's really don't like running open circuit due to the huge voltage potential they generate without a load. Could have arced over to the mainboard and thus why a fuse popped. Have you got pics of the tube?
Click to expand...

Ill second this , i ran one of these PSUs open circuit , flashed over and took itself with it , had to buy a new one in the end .
 
phenol

phenol

0
Joined
Oct 30, 2007
Messages
533
Points
18
the datasheet of my psu claims that it has open cct protection, but i somehow doubt that.
one of the TV triplers that I used to power the tube with quickly gave up the ghost when i left it open circuit, even if there was no arcing involved.
 
phenol

phenol

0
Joined
Oct 30, 2007
Messages
533
Points
18
it is covered in it's own datasheet totally independently from the coverage of the psu in its own psu datasheet. i dont think that the rectifier potted in the output tranformer of those psu's is too much different in terms of topology from a tripler, so if left floating, something may fail due to overvoltage
 
You must log in or register to reply here.




Top