GCode Header

At Hyrel, we believe that you must start with a good GCode header to get a good print. Below are explanations of our standard header files. These can be configured in Slic3r under Printer Settings > Custom G-code > Start G-code

Sample Header

• BLACK entries are for every machine
• GREEN entries are recommended, but must be manually entered
• RED entries are for the EHR only, and MUST be edited by hand
• BLUE entries are for the 16A only, and MUST be edited by hand
• PURPLE entries are explanations
• GOLD entries are optional, but recommended

This is what your header recipe will look like in Slic3r:

; REPORTING/ABORTING :

N14                ; set line numbers for error logging - Slic3r version
M772 S1            ; reset metrics and arm automatic reporting 
M627 X0 Y0 Z0 J-500 K5                 ; setup abort action

; 16A PREHEAT TO SAVE ~ 30 SECONDS ON 16A :
M140 S# ; where # is ~15 degrees below print temperature - to start heating 16A bed sooner

; RANGE SETUP

M107               ; fans/UV           ; off
M106 C255          ; fans/UV           ; set to 0-255 range

; OFFSETS and POSITIONING

G53                ; clear offsets
G21                ; units             : mm
G91                ; coordinatess      : relative
G0 Z10 	           ; drop bed 
G90                ; coordinates       : absolute
G28 X0 Y0          ; home, goto        : X and Y
M229 E1 D1         ; enable E-values (volumetric) - best when slicing for filaments
M660 H# Z#         ; sets Z offset on EHR
G0 X0 Y0 H#        ; applies Z offset on EHR

; HEAD DESIGNATION :

T2                 ; use THIRD tool position from the left - use other recipes for other positions

; TEMPERATURE CONTROL :

M190 S[bed_temperature]        ; bed temp     : set and wait - actual temp is drawn from FILAMENT/EXTRUDER recipe
M109 T12 S[temperature]        ; head temp    : set and wait - actual temp is drawn from FILAMENT/EXTRUDER recipe

(this page is in progress, 20 Apr 2021)