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fix wrong information in research

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Sam Hos
2025-06-23 09:56:40 +02:00
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docs/Assignments/extra_research/FR-1-traces.md
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@@ -1,7 +1,7 @@
# FR-1 Trace lengths
## The experiment
For the experiment, I used FR-1 that has a thickness of 35µm. On there I will mill 4 trace sizes (0.4 mm, 0,6 mm, 0,8 mm and 1 mm) and they all have the same length of 7.5 cm’s. The traces are seperated by 1 Cm.
For the experiment, I used FR-1 that has a thickness of 35µm. On there I will mill 4 trace sizes (0.4 mm, 0,6 mm, 0,8 mm and 1 mm) and they all have the same length of 7.5 cm’s. The traces are separated by 1 Cm.
![alt text](FR-1-Traces.jpg)
@@ -28,24 +28,24 @@ But when working with higher speed frequencies the capacitance can actually mess
## Results
the power. So I grabbed an old robot with 4 stepper motors attached but I could not get them to draw more than 30 watts. So that is why the maximum in this test is 30 watts. I also had a hard time finding a way to measure the temperature of the traces because we only had a heat gun here and the laser was not the place it was actually measuring. So 0,4 mm is not measured properly.
the power. So I grabbed an old robot with 4 stepper motors attached but I could not get them to draw more than 1.6 Amperage. So that is why the maximum in this test is 1.6 Amperage. I also had a hard time finding a way to measure the temperature of the traces because we only had a heat gun here and the laser was not the place it was actually measuring. So 0,4 mm is not measured properly.
| Trace Width Trace | Resistance | Maximum safe wattage | Burn out wattage |
| :---------------- | ---------- | -------------------- | ---------------- |
| 0,4mm | 3,1Ω | 15 | 20 |
| 0,6mm 2 | 2Ω | 22 | 26 |
| 0,8mm | 2Ω | 27 | ?? |
| 1mm | 1,85Ω | ?? | ?? |
| | | | |
| Trace Width Trace | Resistance | Maximum safe Current in Ampere | Burn out Ampere |
| :---------------- | ---------- | ------------------------------ | --------------- |
| 0,4mm | 3.1Ω | 0.7 | 0.85 |
| 0,6mm | 2.7Ω | 0.9 | 1.05 |
| 0,8mm | 2Ω | 1.6 | ?? |
| 1mm | 1.85Ω | ?? | ?? |
| | | | |
* The 0,4 mm trace was the first one I tested. I started with 15 watts for a few seconds. After that I increased the wattage to 20 watts and the trace instantly exploded and burned so I could not get temperature readings there.
* The 0,4 mm trace was the first one I tested. I started with 0.7 amps for a few seconds. After that I increased the wattage to 0.85 amps and the trace instantly exploded and burned so I could not get temperature readings there.
* The 0,6 mm trace it held up well up to 27 watts where it started getting burn marks within a 5-10 seconds. The temperature rose to 50 degrees celsius. At 29 watts the pcb burned out at 68 degrees celsius.
* The 0,6 mm trace it held up well up to 0.9 amps where it started getting burn marks within a 5-10 seconds. The temperature rose to 50 degrees celsius. At 1.05 amps the pcb burned out at 68 degrees celsius.
* When testing the 0,8 mm trace I hit a roof with how much power I could consume with the robot. I could only get up to 30 watts and I did not manage to break the trace after powering it for a few minutes. The maximum I found before it started discoloring was 24 watts at 54 degrees celsius. This was measured after it was left on for 2 minutes.
* When testing the 0,8 mm trace I hit a roof with how much power I could consume with the robot. I could only get up to 1.6 amps and I did not manage to break the trace after powering it for a few minutes. The maximum I found before it started discoloring was 24 watts at 54 degrees celsius. This was measured after it was left on for 2 minutes.
* I could not get to the 1mm trace because the robot could not draw more than 30 watts. So thats why these are not filled in the table.
* I could not get to the 1mm trace because the robot could not draw more than 1.6 Amperage. So thats why these are not filled in the table.
## Extra notes on temperature