Starting and Ending GCODE for Prusa Slicer?

[RB211]

Has anyone created start and end GCODE for Prusa Slicer and profiles for this printer?

[hillsoftware]

Most people are just using the Prusa MK3S+ and changing the retraction to .5

I use the following for start g-code in prusa slicer for Bi-Linear version (would work with manual mesh too)

M83 ; extruder relative mode
G28 ; home all
M420 S1
M104 S[first_layer_temperature] ; set extruder temp
M140 S[first_layer_bed_temperature] ; set bed temp
M190 S[first_layer_bed_temperature] ; wait for bed temp
M109 S[first_layer_temperature] ; wait for extruder temp
M117 Printing Purge Line
G1 Z2 F240
G1 X2 Y10 F3000
G1 Z0.28 F240
G92 E0
G1 Y190 E15 F1500 ; intro line
G1 X2.3 F5000
G92 E0
G1 Y10 E15 F1200 ; intro line
G92 E0
M117 Layer 1 of {total_layer_count}

For UBL I would use the following (basically same as above but M420 removed

M83 ; extruder relative mode
G28 ; home all
G29 A ; Unified bed-level (BL-Touch)
G29 L0 ; Load Mesh Slot 0
G29 J3 ; Probe 9 points to check mesh
M104 S[first_layer_temperature] ; set extruder temp
M140 S[first_layer_bed_temperature] ; set bed temp
M190 S[first_layer_bed_temperature] ; wait for bed temp
M109 S[first_layer_temperature] ; wait for extruder temp
M117 Printing Purge Line
G1 Z2 F240
G1 X2 Y10 F3000
G1 Z0.28 F240
G92 E0
G1 Y190 E15 F1500 ; intro line
G1 X2.3 F5000
G92 E0
G1 Y10 E15 F1200 ; intro line
G92 E0
M117 Layer 1 of {total_layer_count}

I use the following for end g-code

G1 E-4 F2400 ; Retract 4mm and raise Z up
{if max_layer_z < max_print_height}G1 Z{z_offset+min(max_layer_z+2, max_print_height)} F600{endif} ; Move print head up
G1 X5 Y170 F{travel_speed*60} ; present print
{if max_layer_z < max_print_height-10}G1 Z{z_offset+min(max_layer_z+70, max_print_height-10)} F600{endif} ; Move print head further up
M140 S0 ; turn off heatbed
M104 S0 ; turn off temperature
M107 ; turn off fan
M84 X Y E ; disable motors

[RB211]

Thank you, and if using the UBL firmware, add the three additional lines as mentioned in the readme below G28, but remove the M420 command?

[CWO4]

That start looks fine but I would add the "Fade" switch to the M420 command. M420 S1 Z3 The "Z" fade switch brings the Z axis level back to the actual "real world" mechanical level of the printer. And takes a load off processing and motor calls. I fade over 3 layers, hence the "Z3" but you can use any reasonable number you want, the lower the better. It also increases the accuracy of your print.

[RB211]

That start code dragged my extruder into the bed and didn't do the 9 point thing... I've been using a Prusa for the past 5 years and I now realize how sheltered I've been from the real world of 3D printing, this is apparently all new to me.

[CWO4]

It crashed your bed because there was apparently no stored mesh in the EPROM. You have to do a bed level first. Once a leveling has been done AND STORED, all the M420 line does is recall it. If the leveling was bad, the recall is bad. GIGO.

[RB211]

I got it to work, I am using UBL, I had to recall the UBL mesh which I had already done, it is working now that I added those three lines and removed the other one. You must be referring to the Bi-linear Mesh.

…

On Sat, Mar 25, 2023, 16:38 CWO4 ***@***.***> wrote: It crashed your bed because there was apparently no stored mesh in the EPROM. You have to do a bed level first. Once a leveling has been done AND STORED, all the M420 line does is recall it. If the leveling was bad, the recall is bad. GIGO. — Reply to this email directly, view it on GitHub <#9 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAGDE74VBSXFVEHBNPBVSN3W55JVBANCNFSM6AAAAAAWFVOO3U> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[RB211]

Thank you for the help, and a BIG thankyou for authoring this firmware, it is appreciated.