jaco
New Member
Posts: 25
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Post by jaco on May 8, 2017 8:58:44 GMT
Tnx Mark. I will test the bcnc function also. Bcnc is nice for vissually editing the gcode. I will soon post the results.
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jaco
New Member
Posts: 25
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Post by jaco on May 8, 2017 11:50:13 GMT
Tnx Mark. I will test the bcnc function also. Bcnc is nice for vissually editing the gcode. I will soon post the results.
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jaco
New Member
Posts: 25
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Post by jaco on May 14, 2017 10:47:59 GMT
I have tested BCNC with the auto leveling function. I used it to mill this heating element. The purpouse of the heating eliment will be to preheat other PCBs before i start to laser solder components on them (with the Millright). Hope it will work. Note. This project is dangerous and should only be done if you know what you are doing (qualified electrician or electrical engineer). Keep a fire extinguisher at hand. youtu.be/qpu123Bpgh8I still need to add some aluminium to the eliment to make sure the heat is distributed uniformly. Some insolation between the coper board and aluminium will be required. I hope to find tempered glass suitable for that kind of heat. pin.it/ch86cq4
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Post by Derek the Admin on May 14, 2017 22:28:59 GMT
That's awesome. Was I looking that right? Were you measuring temp with your DMM and getting 195 celsius? I'm really looking forward to seeing the laser soldering of PCBs. Please make a video of that when you get it up. Have you done any calculations on how long our laser needs to dwell on a given point to make a given amount of solder paste molten given the preheating?
I'd be interested to see how quickly a board could be finished with it.
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jaco
New Member
Posts: 25
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Post by jaco on May 15, 2017 8:12:39 GMT
You are correct Derek. 195 deg celcius. I have seen that if the solder paste is heated to about 170 deg celcius, the solder paste will reflow within seconds after the laser is applied on a small solder pad (2x2 mm). The laser must be focused to cover the complete solder pad at ones.
I think the PCB was very closed to be burned.
The solder paste I used is reflowwing on 218 deg celcius. I want to try something with a lower reflow temp.
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jaco
New Member
Posts: 25
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Post by jaco on May 16, 2017 7:30:16 GMT
Just a warning again when experimenting with PCB heat eliments. I burned one a little yesterday. I used aluminium plate to spread the heat and kapton tape between the aluminium and pcb as insolation (I could not find tempered glass. The temp on the kapton tape measured 190 deg celsius, about 170 on top of the aluminium. I could not measure temp directly on the PCB becuase of the kapton tape. The kapton tape could resist the heat, but not the PCB. It burned black between some of the coper traces.
I will keep you posted on my sulution.
Any ideas also welcome.
My 2 options currently 1) Stronger laser (3.5 watt) or 2 of the 2 watts from different angles 2) a profesional heat eliment with ceremacic base.
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Post by Derek the Admin on May 17, 2017 19:14:07 GMT
I'd go for a stronger laser, but there may be an advantage to two lasers focused just a slight bit offset from one another. How small of components are you soldering?
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jaco
New Member
Posts: 25
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Post by jaco on May 17, 2017 21:34:46 GMT
I want to solder components like this I aready have two of the 2 watt lasers, so i will try them.
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Post by Derek the Admin on May 18, 2017 2:52:00 GMT
Cool. I'm excited to see it in action.
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