Pausing prints in Octoprint - Revision history

Aneel: /* TL;DR */

2026-01-29T19:37:49Z

TL;DR

Aneel: /* TL;DR */

2026-01-29T19:33:28Z

TL;DR

Aneel: /* Challenge */

2026-01-29T19:33:10Z

Challenge

Aneel: /* TL;DR */

2026-01-29T19:32:04Z

TL;DR

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2026-01-29T19:31:41Z

TL;DR

Aneel: /* TL;DR */

2026-01-29T19:28:35Z

TL;DR

Aneel: /* Gory Details */

2026-01-29T03:37:46Z

Gory Details

Aneel at 03:36, 29 January 2026

2026-01-29T03:36:36Z

Aneel at 03:34, 29 January 2026

2026-01-29T03:34:55Z

Aneel at 03:34, 29 January 2026

2026-01-29T03:34:31Z

← Older revision		Revision as of 19:37, 29 January 2026
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	Now, when you This should work whether the job is started from Octoprint or from the SD card. You should be able to resume either from the control screen on the printer or from Octoprint.		Now, when you This should work whether the job is started from Octoprint or from the SD card. You should be able to resume either from the control screen on the printer or from Octoprint.
		+
		+	You may be tempted to paste some or all of this using "Add Custom G-code". This will work fine, with one exception. "{temperature[0]}" will not be correctly expanded if it is not inserted by the slicer, you'll need to change that to an actual temperature, eg. 215 for PLA:
		+	M109 S215 ; set extruder temp and wait for extruder to warm up

	== Gory Details ==		== Gory Details ==

@@ Line 17: / Line 17: @@
 == TL;DR ==
-[[File:Screenshot of Custom Pause in PrusaSlicer.png|thumb|Screenshot of Custom Pause in PrusaSlicer]]
+[[File:Screenshot of Custom Pause in PrusaSlicer.png|thumb|Custom Pause in PrusaSlicer]]
 In PrusaSlicer, go to the Printers tab. Select Custom G-code. Scroll down to "Pause Print G-code" and paste the following:

← Older revision		Revision as of 19:33, 29 January 2026
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	== Challenge ==		== Challenge ==
		+
		+	[[File:Screenshot of Add Pause in PrusaSlicer.jpg\|thumb\|Add Pause in PrusaSlicer]]

	We would like to be able to pause prints programmatically, so that we can do things like insert magnets or windows, or measure tolerances. PrusaSlicer has built in functionality for this. You can right click on the layer control in the sliced view and insert a pause.		We would like to be able to pause prints programmatically, so that we can do things like insert magnets or windows, or measure tolerances. PrusaSlicer has built in functionality for this. You can right click on the layer control in the sliced view and insert a pause.

@@ Line 14: / Line 14: @@
 == TL;DR ==
 In PrusaSlicer, go to the Printers tab. Select Custom G-code. Scroll down to "Pause Print G-code" and paste the following:
@@ Line 29: / Line 31: @@
 Now, when you This should work whether the job is started from Octoprint or from the SD card. You should be able to resume either from the control screen on the printer or from Octoprint.
 == Gory Details ==

@@ Line 28: / Line 28: @@
   M117 Resumed           ; write message on the screen
-This should work whether the job is started from Octoprint or from the SD card. You should be able to resume either from the control screen on the printer or from Octoprint.
+Now, when you This should work whether the job is started from Octoprint or from the SD card. You should be able to resume either from the control screen on the printer or from Octoprint.
 == Gory Details ==

@@ Line 17: / Line 17: @@
 In PrusaSlicer, go to the Printers tab. Select Custom G-code. Scroll down to "Pause Print G-code" and paste the following:
-    G1 X0. Y210.           ; get the hotend out of the way
+ G1 X0. Y210.           ; get the hotend out of the way
-    M104 S0                ; turn off extruder heater, so the nozzle doesn't dribble
+ M104 S0                ; turn off extruder heater, so the nozzle doesn't dribble
-    M107                   ; turn off print fan
+ M107                   ; turn off print fan
-    M300                   ; make a horrible noise to get the user's attention (optional)
+ M300                   ; make a horrible noise to get the user's attention (optional)
-    M117 Custom Pause      ; write message on the screen
+ M601                   ; tell printer to pause
-    M0                     ; pause
+ @pause                 ; tell Octoprint to pause
-    M109 S{temperature[0]} ; set extruder temp and wait for extruder to warm up
+ M602                   ; resume
-    M106                   ; turn on print fan
+ M109 S{temperature[0]} ; set extruder temp and wait for extruder to warm up
-    M117 Resumed           ; write message on the screen
+ M106                   ; turn on print fan
-This should work whether the job is started from Octoprint or from the SD card. To resume, you need to use the same control (Octoprint or the control on the printer) that you used to start the print.
+This should work whether the job is started from Octoprint or from the SD card. You should be able to resume either from the control screen on the printer or from Octoprint.
 == Gory Details ==

@@ Line 33: / Line 33: @@
 The default pause gcode in PrusaSlicer is [https://reprap.org/wiki/G-code#M601:_Pause_print M601]. When issued from a SD card, this works properly: It parks the hotend out of the way, turns off the extruder heater so filament doesn't dribble out, and shows "Print Paused" on the screen. When you resume the print, it turns the extruder heater back on, waits for it to get to temperature, and then continues. When issued from the serial interface the printer assumes that the serial controller will be responsible for all of the resumption commands. Octoprint doesn't assume this! It doesn't turn the extruder heater back on, which ruins the print.
-Okay. Can we have Octoprint issue the [[https://reprap.org/wiki/G-code#M602:_Resume_print M602] "Resume Print" gcode. Could our pause gcode just be...
+Okay. Can we have Octoprint issue the [https://reprap.org/wiki/G-code#M602:_Resume_print M602] "Resume Print" gcode. Could our pause gcode just be...
      M601

@@ Line 7: / Line 7: @@
 == Challenge ==
-We would like to be able to pause prints programmatically, so that we can do things like insert magnets or windows, or measure tolerances. PrusaSlicer has built in functionality for this.
+We would like to be able to pause prints programmatically, so that we can do things like insert magnets or windows, or measure tolerances. PrusaSlicer has built in functionality for this. You can right click on the layer control in the sliced view and insert a pause.
 {{Note|type=error|text=🛑 PrusaSlicer's default pause does not work correctly with Octoprint on our MK3S+ printers!!!}}

← Older revision		Revision as of 03:34, 29 January 2026
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		+	== State of the Printers ==
		+
	{{Note\|type=warning\|text=This information is up to date as of 2026/01/28}}		{{Note\|type=warning\|text=This information is up to date as of 2026/01/28}}
−
−	~~== State of the Printers ==~~

	Asmbly has three [[Prusa MK3S+]] printers, Apollo, Hermes, and Sun Wukong. Each printer has a Raspberry Pi connected to it that runs Octoprint. Octoprint talks to the printer over a USB connection and treats the printer as a pretty "dumb" peripheral and spoon feeds it gcode commands. Our printers have Revo hotends installed, which solve a lot of problems with the stock heaters and nozzles, but there's currently a bug in the Prusa firmware that stops it working properly with the Revos, which is why we have that annoying upgrade prompt every time we try to print.		Asmbly has three [[Prusa MK3S+]] printers, Apollo, Hermes, and Sun Wukong. Each printer has a Raspberry Pi connected to it that runs Octoprint. Octoprint talks to the printer over a USB connection and treats the printer as a pretty "dumb" peripheral and spoon feeds it gcode commands. Our printers have Revo hotends installed, which solve a lot of problems with the stock heaters and nozzles, but there's currently a bug in the Prusa firmware that stops it working properly with the Revos, which is why we have that annoying upgrade prompt every time we try to print.