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<\/p>\nGood Morning from my Robotics Lab! This is Shadow_8472, and today, I am running a looping Hello World program on my Raspberry Pi for a while to see if my work for the last few weeks needs to be redone in ABS plastic. Let’s get Started!<\/p>\n
I’m going with the hypothesis that while the Pi may run a bit warm for PLA plastic, with the heat syncs, and ventilation, I should be okay.<\/p>\n
My procedure will involve using an infrared temperature sensor I borrowed from the workshop I joined a couple months ago. After messing with it for a while, I figured out how to use the temperature probe that came with it. I’ve taped the probe in the space I’m most concerned about overheating as I don’t have a line of sight view of the place.<\/p>\n
Each data point I take will track the ambient temperature of a consistent point nearby, the temperature of the probe, the CPU speed, and some points will take the temperature of a chip on the inverted Pi’s exposed underside, but only when data points are coming in after 5 minutes or more.<\/p>\n
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I’ve started collecting data. The probe wire is notoriously difficult to keep in place. I took data points while it was off and freshly booted. Nothing much changed temperature wise except the chip getting a little warmer. I’ll include a screenshot of my results later.<\/p>\n
***<\/p>\n
It’s part way through data collection. I may have skewed the results of collecting the data on the chip on the top side by measuring at a different angle. Ambient temperatures are fairly steady but the probe location below the heat syncs is slowly climbing. I just took another measurement, and the possibly skewed one doesn’t seem like I’ll need to throw it out after all. I was hoping it was my readings and not a temperature spike. I’m also concerned that the probe may be slipping, especially if it’s getting closer to the heatsink.<\/p>\n
***<\/p>\n
The probe was slipping! Its readout was growing steadily as the tape holding it in place gave way. My data at T=40 minutes and on will have it correctly positioned.<\/p>\n
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***<\/p>\n
Estimates of the low end for PLA softening are around 60 degrees C or 140 F. In conclusion: While I believe my data has a large margin of error, I do not believe it is so great as to void my conclusion that it is safe for my case to operate my Pi under these conditions.<\/p>\n
The Pi only ever reached 33% CPU usage, I believe it was throttled by the task of writing to a command line. If it were to run hotter, the plastic might still be in danger. I will need to redo this test when I’m running image analysis on it.<\/p>\n
Final Question: How else can I improve my tests?<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Good Morning from my Robotics Lab! This is Shadow_8472, and today, I am running a looping Hello World program on my Raspberry Pi for a while to see if my work for the last few weeks needs to be redone in ABS plastic. Let’s get Started! I’m going with the hypothesis that while the Pi … <\/p>\n