Topics created by Harley3D

@Harley3D Longer answer. If the only change is the hot end then you might not need to do anything other than run a heater tune. BUT it depends on the thermistor you use. If you use the same thermistor as your previous hot end, then nothing changes. But if you use the Slice Engineering thermistor, then you will need to change the B and C values and possible the T value too in M305.

I know the values for the Slice Engineering thermistor are documented somewhere but I didn't manage to find them in the 10 minutes or so I just spent trying. Hopefully someone who knows where to look or who knows what the values are will step in and help you out.

In any case, you should run a heater tune (M303) and put the results in M307. Also be aware that the Slice Engineering thermistor will be accurate at normal print temperatures and up to 500 deg C or so, but it might not be very good accurate ambient temperatures.

@Harley3D You should be okay updating to 2.05.1, though. Use https://github.com/dc42/RepRapFirmware/releases/tag/2.05.1
There shouldn't be any changes to your config and other files, though do check the 'what's new' notes to be sure. https://github.com/dc42/RepRapFirmware/blob/dev/WHATS_NEW.md

Ian

@dc42, I did not know this. I've been running in bang-bang mode. Crap. Okay, I'll do a bed heater PID tuning. Thank you!

Commands that you want to execute before the GCode file starts executing at all can be put in the start.g macro. But the nozzle hasn't been heated at that point.

As you need to heat the nozzle before you run the nozzle clean lines, it's simplest to put those lines in the S3D start script, like you did before. Alternatively, you can put those lines (and any other parts of the start script that you want) in a macro file, then use the M98 command in the S3D start script to call that file.

Thanks, Worry over!