lokester

@Slashee_the_Cow, Your instructions worked great. With the temperature preheat instructions placed in my startup scripts as you suggest, Cura no longer places any such instructions in my gcode prior to the startup script. Many Thanks !!

When I look at my gcode files after slicing, it looks like Cura is adding a few lines "before" the startup script as follows: ;FLAVOR:Marlin ;TIME:7272 ;Filament used: 4.89266m ;Layer height: 0.2 ;MINX:85.576 ;MINY:81.578 ;MINZ:0.2 ;MAXX:145.167 ;MAXY:141.168 ;MAXZ:16.2 ;TARGET_MACHINE.NAME:Creality Ender-3 ;POSTPROCESSED ;Generated with Cura_SteamEngine 5.5.0 M140 S60 M105 M190 S60 M104 S210 M105 M109 S210 M82 ;absolute extrusion mode ; Script based on an original created by tjjfvi (https://github.com/tjjfvi) (first line of startup script) The heating sequence that I am dealing with is in these lines of code. I will change my startup script as you suggest and see how it affects how Cura slices. Thanks!

New user, Ender 3 v2 with BL Touch bed leveling, Marlin FW. Have had printer for a few months now and using Cura 5.5 (and now 5.6) for my slicer. Reading on the web, I get all sorts of opinions as to what the pre and post machine g-code scripts should be. I will past my pre script below but will also attach a text file with both pre and post scripts as well as an actual gcode file from a recent project. Currently, every time I print a job, the printer does the Bed Leveling - which I don't really mind that much, however; on another post I see where there is a way to start the bed leveling as soon as the bed is up to temperature. My current setup does not start leveling until after the bed is at temp, and then waits more time until the nozzle is at temp. Looking at the actual gcode from a project, I see where there are several lines of gcode "before" the pre print script. Some are redundant. Not to take up too much of your time, but request someone with more knowledge take a peek at my pre start script and the first few lines of my project gcode and offer opinion as to how to streamline my bed leveling so it starts as soon as the bed is at temp allowing the nozzle to heat up while the leveling process is taking place. ; Script based on an original created by tjjfvi (https://github.com/tjjfvi) ; An up-to-date version of the tjjfvi's original script can be found ; here: https://csi.t6.fyi/ ; Note - This script will only work in Cura V4.2 and above! ; --- Global Settings ; layer_height = {layer_height} ; smooth_spiralized_contours = {smooth_spiralized_contours} ; magic_mesh_surface_mode = {magic_mesh_surface_mode} ; machine_extruder_count = {machine_extruder_count} ; --- Single Extruder Settings ; speed_z_hop = {speed_z_hop} ; retraction_amount = {retraction_amount} ; retraction_hop = {retraction_hop} ; retraction_hop_enabled = {retraction_hop_enabled} ; retraction_enable = {retraction_enable} ; retraction_speed = {retraction_speed} ; retraction_retract_speed = {retraction_retract_speed} ; retraction_prime_speed = {retraction_prime_speed} ; speed_travel = {speed_travel} ; Ender 3 Custom Start G-code G92 E0 ; Reset Extruder G28 ; Home all axes G29 P1 ; run auto bed leveling routine G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start position G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; Draw the first line G1 X0.4 Y200.0 Z0.3 F5000.0 ; Move to side a little G1 X0.4 Y20 Z0.3 F1500.0 E30 ; Draw the second line G92 E0 ; Reset Extruder G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed G1 X5 Y20 Z0.3 F5000.0 ; Move over to prevent blob squish pre and post scripts.pdf CE3E3V2_Massey Ferguson Steering Wheel Center Cover.gcode

Wow, guess I been pulling my hair out for nothing. So I guess it is time I start playing around with supports. Thanks to both of you for you replies.

New user with 3D printers. Creality Ender 3 v2 with heated magnetic bed, auto leveling. Latest Marlin FW. Also have OctoPi interface via Raspberry Pi. Using Cura 5.5.0 for my slicer and then typically utilize the "Print with OctaPrint" option. Using PLA+ filament. Bed temp 60C and nozzle temp 200-210C. I am currently trying to print a small cylindrical object that has a couple of overhangs where the outside diameter increases. My printer is having issues navigating these overhangs and strings material all over the place. I have tried increasing temperature to 210C, slowing down (both "speed" and "print speed") to 50% at these layers but nothing helps. I have had similar results on other print projects where the material has to span from one side to the other. Attached is a screenshot of my project in Cura as well as two pics of my results. The lowest overhang is less than 3mm radially and the upper overhang is 5mm radially. Are either of these overhangs enough to require "supports"?