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RRCRat Rig Community [Unofficial]
Created by Flo@GRNbms on 12/15/2024 in #fix-my-print
First layer problem
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134 replies
RRCRat Rig Community [Unofficial]
Created by Flo@GRNbms on 12/15/2024 in #fix-my-print
First layer problem
@savh tyvm, that seems to immediately solve the issue with inconsistent z-height at start. Still having the issue with ripples/waves in the print after a little while, but at least the start of the print is correct now. Looks awful. I haven't tuned the material yet though so I'll tune EM, pressure advanced etc then report back.
134 replies
RRCRat Rig Community [Unofficial]
Created by Flo@GRNbms on 12/15/2024 in #fix-my-print
First layer problem
I have a similar issue. This is the relevant printer.cfg-section 
[gcode_macro RatOS]
variable_relative_extrusion: False
variable_preheat_extruder: True
variable_calibrate_bed_mesh: True
variable_nozzle_priming: "primeblob"
variable_start_print_park_in: "center"
variable_start_print_park_z_height: 5
variable_end_print_park_in: "back"
variable_pause_print_park_in: "back"
variable_end_print_park_z_hop: 20
variable_macro_travel_speed: 300
variable_macro_travel_accel: 3000
#variable_bed_heat_soak_time: 1200
variable_hotend_heat_soak_time: 300
variable_start_print_park_in: 'primeblob'
[gcode_macro RatOS]
variable_relative_extrusion: False
variable_preheat_extruder: True
variable_calibrate_bed_mesh: True
variable_nozzle_priming: "primeblob"
variable_start_print_park_in: "center"
variable_start_print_park_z_height: 5
variable_end_print_park_in: "back"
variable_pause_print_park_in: "back"
variable_end_print_park_z_hop: 20
variable_macro_travel_speed: 300
variable_macro_travel_accel: 3000
#variable_bed_heat_soak_time: 1200
variable_hotend_heat_soak_time: 300
variable_start_print_park_in: 'primeblob'
As you can see I have commented out bed_heat_soak, I'm running that manually before each print for a minimum of 20 minutes. Another weird issue I have is that the initial z height differs somewhat in most prints. I have to adjust it at the start, and it becomes perfect, then after a while it starts with the same waves as OP showed. Almost seems like it isn't using the bed mesh. It scans the relevant bed area before each print, so I believe @boinappi suggestion is not relevant? Printer is a vcore 4 400, enclosed.
134 replies