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--- print_start_workflows [2025/11/05 17:52] – [Example Orca Machine Start gcode] dshoop
+++ print_start_workflows [2025/11/19 03:19] (current) – [Example PRINT_START macro] dshoop
@@ Line 1: / Line 1: @@
+====== Print Start Workflows ======
+{{tag> articles setup about}}
+One way (slicer side and [[slicer machine start print gcode]]), or another (Klipper side and [[PRINT_START macro]]), there's certain steps we need to take to start printing the gcode that's slice from an object. There's reasons and rationale for why you'd place certain actions where.
+==== Minimal workflow ====
+  * heat bed
+  * home and position
+  * heat extruder
+  * prime nozzle
+  * reset extruder
+=== More Realistic Workflow ===
+  * check that bed's level with SCREWS_TILT_CALCULATE max_deviation check
+  * heat bed
+  * home and position
+  * run adaptive bed mesh
+  * heat extruder
+  * Set the feed speed to 100%
+  * Set the flow rate to 100%
+  * prime nozzle
+  * reset extruder
+==== Example Orca Machine Start gcode ======
+<code>
+;
+; Orca Slicer Machine Start G-code by @dshoop v2.2a
+;
+; PRINT_START
+; note the above line is commented out as we may or may not need to call this depending
+; on our version of Klipper. If earlier versions of Elegoo's distribution it
+; was called automatically.
+G28; Home, if this fails no point to continue; required before BED_MESH_CALIBRATE
+M190 S[bed_temperature_initial_layer_single] ;wait for bed to reach temperature
+M104 S150 ;pre-warm extruder to 150C below typical extrusion temps so as not to ooze, no wait
+;
+BED_MESH_CALIBRATE mesh_min={adaptive_bed_mesh_min[0]},{adaptive_bed_mesh_min[1]} mesh_max={adaptive_bed_mesh_max[0]},{adaptive_bed_mesh_max[1]} ALGORITHM=[bed_mesh_algo] PROBE_COUNT={bed_mesh_probe_count[0]},{bed_mesh_probe_count[1]} ADAPTIVE=1 ADAPTIVE_MARGIN=0
+;
+M104 S[nozzle_temperature_initial_layer] ;Heat extruder to temp, no wait
+M220 S100 ;Set the feed speed to 100%
+M221 S100 ;Set the flow rate to 100%
+G90
+G28 ;home
+G1 Z10 F300
+G1 X67.5 Y0 F6000
+G1 Z0 F300
+M109 S[nozzle_temperature_initial_layer] ; wait for extruder to reach temp
+G92 E0 ;Reset Extruder
+G1 X67.5 Y0 Z0.4 F300 ;Move to start position
+G1 X167.5 E30 F400 ;Draw the first line
+G0 Y0.6 F120
+G1 X67.5 E60 F400 ;Draw the second line
+G0 Z0.6 F120
+G92 E0 ;Reset Extruder
+</code>
+==== Example PRINT_START macro ====
+<code>
+[gcode_macro PRINT_START]
+gcode:
+	RESPOND PREFIX="" MSG=">> Klipper PRINT_START Macro <<"
+	M117 Starting Klipper START_PRINT macro
+	M400 ; wait for current moves to finish
+	CLEAR_PAUSE ; clear any pause conditions
+	G28 ; home before SCREWS_TILT_CALCULATE
+	SCREWS_TILT_CALCULATE max_deviation=0.02 ; assume bed's z plane is level within given deviation
+  	M105 ;Request temperature reports to be sent to the host as soon as possible
+	RESPOND PREFIX="" MSG=">> PRINT_START Macro complete <<"
+  	M117 PRINT_START Macro complete
+</code>