I wanted to see how the temperature spread in the build platform in the long quest for minimizing warp and had the chance to borrow a thermal camera. I´ve posted a few pictures in intervals using the "preheat" function.
I had the chance to borrow a good thermal imaging camera, so why not take the opportunity and take some platform pictures? I tried a few test surfaces with a know temperature before I started and it reported the correct temperature on those so I feel like I can trust the image values.
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This is the starting position. The camera said 20.0 as well as my fluke thermometer. Reported temperature by UP software is: 15.9c, the difference can be explained that it was stored in a colder room about an hour before. |
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2:30 after start, there's around 10c difference between center and edges. Reported temperature by UP software is 59c |
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About 3 minutes after start. Reported temperature by UP software is 63c. |
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A little more than 4 minutes after start, UP software reports 80c. |
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5 minutes after start. the UP software reports 86c. Hottest spot is 75c and around 2cm from the edge the temperature is almost 64c. |
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10 minutes after start, the UP software reports 103c and the 10c difference between hotspot and edge seems pretty consistent. |
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15 minutes after start, the UP software reports 105c and there is not much difference after this point. it seems like it's the maximum temp. |
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A view from the side showing the aluminium profile where the heater element is. |
I have to put on my thinking hat and grab a beer...
Now that you've characterized the system - you can modify and compare.
ReplyDeleteI'm curious if a blanket will help while warming up - a piece of wool felt, for example. Remove just before starting the job. Software should keep the temperature below the set-point, but perhaps this will help reduce the delta.
Hey Chris.e thanks for all , you open my eyes to see more about my printer curling I thing is the variation of temperature . I have problems whit measuring in X,Y,Z and curling whit green paint and blue tape , i don´know .
ReplyDeletePaul, yeah there's alot to test. The makerbot community have done a fair deal of trial and error to learn from. So far I´ve been thinking about a heat chamber or an IR heater. But the blanket idea is alot easier to test, thanks!
ReplyDeleteJose, it made a big difference from me when I moved to a warmer room with still air. And also setting the z axis correctly. Good luck!