Hi all.
Sorry: this is going to a long one so apologies in advance. I blew the tube recently in my 100watt co2 laser. I replaced both tube and power supply with new ones from a company in Australia. All went well fitting it up but as soon as i tried a material settings test all hell broke loose, the first square at 9%power burnt straight through 3mm ply, and everything else was just catching fire. No matter what power setting i chose in lightburn each attempt was the same. Had no choice but to take it out and reinstall my old power supply and straight away problem solved. The tekkie who installed the power supply us adamant it is faulty: so i messaged the seller, told them of the issue and asked for a replacement. They wont do that and have said im not programming the power supply correctly. My question to you guys is… is he correct ? Can a laser power supply be configured for different wattage machines ? My tekkie doesnt think so but the seller is adamant. Any advice greatly appreciated. Ive attached
I think it would be more interesting to see how you connected the power supply to be honest. What kind controller you have?
did you take pics / note of how the previous psu was connected?
The unit itself looks pretty much like the one that came with my 50W as it arrived.
It was wired in by a guy with a degree in micro electronics, who also designed and built underwater remote robots to mend fishing nets, so no, i dont think theres a need to be showing you how it was wired in.
Squinting at the product description, if you have the DY13 model the maximum current should be about right for that machine. However, the supplies have an internal trimpot to set the maximum current and it’s possible to be grossly misadjusted at the factory.
The description also says:
1.5.The power supply itself can be equipped with a feedback connector, which can be used for closed-loop control and to check the actual working current of the laser equipment.
If it is not working, there is still a need. So he was familiar with the wiring on Chinese lasers? I have been an Electronics Tech since 1962 and I still have questions.
so we try again, as it obviously doesnt work as it should could you tell us which controller you have and which pins were connected to which pins of the power suppy?
How do i do that. The power supply didnt work properly so he reinstalled my old one. Im pretty sure a guy whos built underwater rov’s, his own cnc’s and lasers knows how to wire up power supplies.
If it was working, then there is only a couple of wires that need to be spliced.
The standard lps in these should have the same pin out and, I’d expect them to be direct swap with the replacement.
The lps has only a few control signals to it.
The pwm or analog voltage on the IN terminal controls the current limit
L goes low when active to allow the lps to excite the tube or lase
P (active low) is a water protection input to prevent lasing if there is no coolant flow.
Measure the IN voltage at 50% power setting and see if it’s 2.5V or thereabouts. There is no need to power up the lps, you can measure it at the controller.
Maybe the lps too big? lol… sorry couldn’t resist.
I’m sure he’s more than capable of splicing two wires. He’s clearly got the anode and cathode wired correctly. That leaves the issue the lps or before.
Let us know if your voltages are OK.
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