[Marlin] M109 - Wait for Hotend Temperature
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📅Update: 2020/09/18
This command optionally sets a new target hot end temperature and waits for the target temperature to be reached before proceeding. If the temperature is set with S then waits only when heating. If the temperature is set with R then will also wait for the temperature to go down.
With PRINTJOB_TIMER_AUTOSTART this command will start the print job if heating, and stop the print job timer if the temperature is set at or below half of EXTRUDE_MINTEMP.
This command (as well as and ) can block new commands from the host, preventing remote shutdown. However, if EMERGENCY_PARSER is enabled, a host can send to break out of the wait loop.
To set the hot end temperature and proceed without waiting, use .
M109 [B<temp>] [F<flag>] [I<index>] [R<temp>] [S<temp>] [T<index>]
[B<temp>] With AUTOTEMP, the max auto-temperature.
[F<flag>] Autotemp flag. Omit to disable autotemp.
[I<index>] Material preset index. Overrides S.
[R<temp>] Target temperature (wait for cooling or heating).
[S<temp>] Target temperature (wait only when heating). Also AUTOTEMP: The min auto-temperature.
[T<index>] Hotend index. If omitted, the currently active hotend will be used.
Set target temperature and wait (if heating up)
Set target temperature, wait even if cooling
Set target temperature for E1 and wait (if heating up)
AUTOTEMP: Set autotemp range, wait for temp
'AUTOTEMP: Disable autotemp, wait for temp'