Bed leveled/flattened, and z-offset fun - Getting good prints with the Silicon Spacer Mod
Applying the Silicon Spacer Mod, Bed Leveling, Squaring the Axis’s, and calibrating the Z-Offset for a new Anycubic Kobra 2 Max.
00:00 Assessing the new Kobra 2 Max Bed
00:58 What we are going to do
01:18 Why we need spacers for the spacers
03:00 A note on spacer mounting orientation
03:31 Removing the Bed
03:55 Assessment of the root cause
04:32 Spacer Installation
06:30 The Dial Indicator
07:25 Dial Indicator Installation and Use
08:51 Measure, Adjust, Repeat
12:13 Bed Flatness - The Results
12:27 Checking the Z axis is square to the bed
12:35 Checking the X axis is parallel to the bed
14:26 Run Auto Leveling
14:42 Clean beds make for sticky first layers
16:05 Note on my G Code
17:15 Caution for the first print post auto-level
18:25 Assessing the first test print
24:53 The first layer results
25:31 Further tuning
The Silicon Spacers :
Dial Indicator :
3d Printed Silicon Spacers - Spacers :
Note: The thickness added to the middle spacers is 3mm, any spacers that measure this thickness with a proper diameter should work just fine.
Dial Indicator Mount (Note, there are multiple types of mounts in the files section including the version I used which replaces the back of the dial indicator)
Z-Offset Calibration Print :
My Custom Start G-Code (warms the bed and nozzle (only a bit), then sets the nozzle temp a little bit warmer and homes XYZ, then sends the nozzle to the front and parks it on the bed surface while it heats to temp, after it drags a line and begins the print) :
G90 ; use absolute coordinates
M83 ; extruder relative mode
M140 S[first_layer_bed_temperature] ; set bed temp
M104 S60 ; warm extruder temp
M107 ; Set Fan Off
M190 S[first_layer_bed_temperature] ; wait for bed temp
M104 S180 ; warmer extruder temp
M107 ; Set Fan Off
G28 ; move X/Y/Z to min endstops
G1 ; lift nozzle a bit
G92 E0
G1 Y3 F2400 ; zero the extruded length
M104 S[first_layer_temperature] ; set extruder temp
M109 S[first_layer_temperature] ; wait for extruder temp
G1 X180 E40 F500 ; Extrude 25mm of filament in a 5cm line.
G92 E0 ; zero the extruded length again
G1 E-0.2 F3000 ; Retract a little
G1 X181 F4000 ; Quickly wipe away from the filament line
M117
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7 months ago 00:26:46 2
Bed leveled/flattened, and z-offset fun - Getting good prints with the Silicon Spacer Mod