Hello,

I'd like to file a feature request. Very frequently I see start g-codes that first heat up the nozzle and bed to an intermediary temperature, then start mesh bed levelling, then wait for the final printing temperature to be reached. This is pretty clever as it saves some time and prevents oozing during bed levelling.

It doesn't work so well when you are printing several jobs in a row. The nozzle and bed will still be hot, so M109 and M190 will wait for them to cool down before continuing, only for the job to heat them up again immediately afterwards.

My proposal is to add a parameter to M109 and M190 that tells the printer to wait for both to heat up, but if the current temperature exceeds the requested temperature, simply continues without pausing.

Thank you!