What is the first file called when Marlin begins printing? I am trying to modify ttsalo's fork of Marlin that is used for SCARA printers. The program begins by homing each axis like this: G21 ; set units to millimeters M107 G28 G92 X0 Y0 Z0 G1 Z5 F5000 G90 ; use absolute coordinates G92 E0 M82 ; use absolute distances for extrusion G1 F1800.000 E-1.00000 G92 E0 G1 Z0.300 F1800.000 G1 X79.507 Y77.641 F1800.000 G1 E1.00000 F1800.000 However once the homing is complete, the X axis rotates, then the extruder waits to heat up and then the print begins. My question is which part of Marlin governs this initial movement? https://reprap.org/forum/read.php?147,490295,490295#msg-490295 Wed, 22 Apr 2026 14:06:49 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?147,490295,490317#msg-490317 Re: What is the first file called when Marlin begins printing? https://reprap.org/forum/read.php?147,490295,490317#msg-490317 Evil Monkey Firmware - experimental, borrowed, and future Sun, 29 Mar 2015 21:25:28 -0400 https://reprap.org/forum/read.php?147,490295,490312#msg-490312 Re: What is the first file called when Marlin begins printing? https://reprap.org/forum/read.php?147,490295,490312#msg-490312 Evil Monkey Firmware - experimental, borrowed, and future Sun, 29 Mar 2015 20:54:44 -0400 https://reprap.org/forum/read.php?147,490295,490311#msg-490311 Re: What is the first file called when Marlin begins printing? https://reprap.org/forum/read.php?147,490295,490311#msg-490311 AndrewBCN Firmware - experimental, borrowed, and future Sun, 29 Mar 2015 20:45:52 -0400 https://reprap.org/forum/read.php?147,490295,490308#msg-490308 Re: What is the first file called when Marlin begins printing? https://reprap.org/forum/read.php?147,490295,490308#msg-490308
Its occurring right here:

G28
G92 X0 Y0 Z0

????????????

G1 Z5 F5000]]> Evil Monkey Firmware - experimental, borrowed, and future Sun, 29 Mar 2015 20:16:57 -0400 https://reprap.org/forum/read.php?147,490295,490305#msg-490305 Re: What is the first file called when Marlin begins printing? https://reprap.org/forum/read.php?147,490295,490305#msg-490305
For what you are looking for, I think you want to look at the start G Code that is inserted by your slicer.]]> jbernardis Firmware - experimental, borrowed, and future Sun, 29 Mar 2015 19:51:36 -0400 https://reprap.org/forum/read.php?147,490295,490295#msg-490295 What is the first file called when Marlin begins printing? https://reprap.org/forum/read.php?147,490295,490295#msg-490295
G21 ; set units to millimeters
M107

G28
G92 X0 Y0 Z0
G1 Z5 F5000

G90 ; use absolute coordinates
G92 E0
M82 ; use absolute distances for extrusion
G1 F1800.000 E-1.00000
G92 E0
G1 Z0.300 F1800.000
G1 X79.507 Y77.641 F1800.000
G1 E1.00000 F1800.000

However once the homing is complete, the X axis rotates, then the extruder waits to heat up and then the print begins. My question is which part of Marlin governs this initial movement?]]> Evil Monkey Firmware - experimental, borrowed, and future Sun, 29 Mar 2015 19:08:38 -0400