Output power of a 50Watt Chines Laser

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Hugo Nicolai
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Output power of a 50Watt Chines Laser

Postby Hugo Nicolai » Wed Dec 28, 2016 9:25 am

Good Day to you ALL out there,

Just received my block of carbon to test my output.

cut a pice 2"x2"x3/4" and drilled a precise hole into the block and inserted my digital pro.
Waited until probe came to room temperature which was 22.7 c. After a 10 sec burn temp was 33.9 c.
the mass of carbon was 56.68g with a Cp 0.71 the output at 95% power was 45.07 watts.

the test was also run without the collimator lens, the results was the same.
Will be testing Power output at different power settings.
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fred ungewitter
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Re: Output power of a 50Watt Chines Laser

Postby fred ungewitter » Wed Dec 28, 2016 10:26 am

I read your post with some fascination. Russ sells DooHICkey devices made from black anodized aluminum to be used in a similar manner. I wasn't aware that one could use a block of carbon. For that matter, I had never considered that one could purchase a block of carbon. Is it carbon in the form of graphite?

Russ designed his device to represent a one-percent power increase to be shown as a one degree C increase in temperature. It makes things easier for me, as the math is simpler.

Do you think your design could be suitably adjusted for similar readings?

Sort of related to this is your power setting. Have you noted the maximum recommended current to be used for your tube? My chinese 60w tube is not a true 60w tube and would burn out earlier if I pumped any power setting higher than 55 percent. Your 45 w figure at 95 percent suggests that you may be running higher current than optimum.

Consider to find your tube length figures for maximum current. If you don't have an ammeter installed to monitor your power settings, you would find one useful to increase the life of the laser tube.
fred

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Hugo Nicolai
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Location: Largo, Florida

Re: Output power of a 50Watt Chines Laser

Postby Hugo Nicolai » Wed Dec 28, 2016 11:42 am

Sorry, But your right it is a graphite block from E-Bay
(Graphite Blank Block Sheet Plate High Density Fine Grain) to be exact.
the company is "Saturn Industries, Inc." on e-bay look for "saturnind (1848 )"
I hope i did not make any other mistakes, Its been a long time since I played with chemistry.
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Hugo Nicolai
Posts: 14
Joined: Sat Dec 17, 2016 6:59 am
Location: Largo, Florida

Re: Output power of a 50Watt Chines Laser

Postby Hugo Nicolai » Wed Dec 28, 2016 11:55 am

Im not sure if this could be set up the same, my math was not that hard.
Q=mC*^delta T
I could be wrong but all my testing seem to come out correctly.
I will see if I can get 1% of change in temp with 1% of power increases using this graphite as well.
I did not know Russ used a pice of anodized aluminum, that worked as far as I could tell I will look into trying that too.
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fred ungewitter
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Re: Output power of a 50Watt Chines Laser

Postby fred ungewitter » Wed Dec 28, 2016 2:37 pm

Hugo Nicolai wrote:Sorry, But your right it is a graphite block from E-Bay
(Graphite Blank Block Sheet Plate High Density Fine Grain) to be exact.
the company is "Saturn Industries, Inc." on e-bay look for "saturnind (1848 )"
I hope i did not make any other mistakes, Its been a long time since I played with chemistry.


You're right, it is carbon, no need to apologize. Graphite is the first type of carbon of which I could conceive that would be suitable for testing in this manner. If you could have found a suitable piece of diamond, I understand it might have worked too.

I found the ebay listings. Pretty decent prices for this sort of device, compared to the cost of getting small quantities of aluminum to be anodized. I don't know enough physics to know how large the block would have to be in order to get one degree C increase to represent one watt power increase, but I'd suspect that it's related to mass and not volume. Graphite is so light, I would expect the volume to be pretty high.

I saw your formula for the power calculations, but it's beyond my skill to reverse solve for the watt per degree or degree per watt form to determine mass and or volume. Perhaps in my younger days...
fred

Redsail clone 60w 700 x 500
home upper right
RDWorks 8.01.18
Windows 7

Emblaser A3 4w diode laser
BCN3D Sigma Dual Extruder 3d printer
LMS Mini-mill
Cube 3rd gen 3d printer (works great, for sale)
Under construction: OX CNC 1000x750 router - out of the box, still in baggies!

Hugo Nicolai
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Location: Largo, Florida

Re: Output power of a 50Watt Chines Laser

Postby Hugo Nicolai » Wed Dec 28, 2016 3:47 pm

I will post it when I can figure out how much graphite we needed for a one CM change for one watt of power.

I also was going to build the laser diode Mark six but I decided not to because it has to be mounted every time I want to check alignment.
I have come up with a different method after I figure out how to do it I will post it also.

Nick.
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Hugo Nicolai
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Location: Largo, Florida

Re: Output power of a 50Watt Chines Laser

Postby Hugo Nicolai » Wed Dec 28, 2016 3:50 pm

Made another mistake it wasn't CM, meant Centergrade per watt of Power.
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Hugo Nicolai
Posts: 14
Joined: Sat Dec 17, 2016 6:59 am
Location: Largo, Florida

Re: Output power of a 50Watt Chines Laser

Postby Hugo Nicolai » Wed Dec 28, 2016 3:51 pm

Making a lot of mistakes when I talk too fast.
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fred ungewitter
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Re: Output power of a 50Watt Chines Laser

Postby fred ungewitter » Wed Dec 28, 2016 4:09 pm

Hugo Nicolai wrote:I will post it when I can figure out how much graphite we needed for a one CM change for one watt of power.

I also was going to build the laser diode Mark six but I decided not to because it has to be mounted every time I want to check alignment.
I have come up with a different method after I figure out how to do it I will post it also.

Nick.


Take a look here:
viewtopic.php?f=17&t=1030&p=5895#p5895
It's an amazingly simple approach that is far easier than mounting on the end of the big tube. One still has to drop the nozzle assembly and it may require some adaptation for models other than the redsail type.
fred

Redsail clone 60w 700 x 500
home upper right
RDWorks 8.01.18
Windows 7

Emblaser A3 4w diode laser
BCN3D Sigma Dual Extruder 3d printer
LMS Mini-mill
Cube 3rd gen 3d printer (works great, for sale)
Under construction: OX CNC 1000x750 router - out of the box, still in baggies!

Hugo Nicolai
Posts: 14
Joined: Sat Dec 17, 2016 6:59 am
Location: Largo, Florida

Re: Output power of a 50Watt Chines Laser

Postby Hugo Nicolai » Tue Jan 10, 2017 11:25 am

I wonder if any one out there is having this problem that I encountering.
After completing a scan my leaser head moves to the lower left side and stops but the laser is still on.
I have checked my settings and Im unable to figure it out, This happens only in the scan mode!
Blue machine from China
50 Watt 500 x 300
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RDWorks V8.01.18
Hugo


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