diff --git a/docs/Assignments/extra_research/FR-1-traces.md b/docs/Assignments/extra_research/FR-1-traces.md index ffc8b13..dac21a5 100644 --- a/docs/Assignments/extra_research/FR-1-traces.md +++ b/docs/Assignments/extra_research/FR-1-traces.md @@ -20,12 +20,18 @@ the power. So I grabbed an old robot with 4 stepper motors attached but I could | | | | | - * The 0,4 mm trace was the first one I tested. I started with 15 watts. 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 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 0,6 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. + + * 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. - * 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 45 degrees celsius. At 29 watts 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. 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. + +## Extra notes on temperature +When something keeps fluctuating in heat it will increase in size and shrink again. This can make it so your board deteriorate faster and make traces break faster. So it isn't recommended to use high wattages in pcb traces. + ## Recommendations for next time Make bigger pads to hookup the power easier to the pcb and maybe remove all the excess copper but that takes a super long time.