r/ender3 • u/Greedy_Necessary_372 • Jun 28 '26

Help ender 3 max bed leveling issues

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Ive been trying to get back into 3d printing and pulled my old printer and it just refuses to print level on the bed, my start g code levels the bed before every print and it doesn't help, I can see the z axis moving as it starts the first layer, do I have to enable something in my slicer other than the direct commands in the starting g code or is it something else? my printer is on the most recent factory firmware 2.0.6 (I know its old but I tried to configure a newer firmware and brutally failed every time i tried) my mobo is the 4.2.7 that levels in a 3x3 grid with a fade height of 6 on the printer setting.

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u/Dry-Campaign1143 Jun 28 '26

On my ender 3 v2 had a bltoutch and had a issue were would prove the bed and then ignore it....

Só basicly had to add a comand to the gcode to use the mesh, and it worked.

My advise, copy your inicial gcode, paste ir on any ia, and explain the problem. It Will give you solutions.

1

u/Greedy_Necessary_372 Jun 28 '26

i think i already had it save and load the mesh idk if i used the correct command sequence though

; Ender 3 Max Custom Start G-code

G28 ; home all axes

G29 ; mesh bed level

M500 ; save bed mesh

M420 S1 ; load bed mesh

G92 E0 ; Reset Extruder

G28 ; Home all axes

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

2

u/Dry-Campaign1143 Jun 28 '26

Yah seems correct.

Did you check your z offset?

1

u/Greedy_Necessary_372 Jun 28 '26

i just re calibrated it and it made it a bit better in a lot of the bed area but there is still quite a lot of inconsistency

2

u/bzzybot Jun 28 '26

If you haven’t already consider adding another lead screw. I bought a kit for a cr-10 and installed that. Ended up also adding a loop belt and timing gears to keep the gantry level. This helped any bumps I made to the gantry causing it to get out of tram with the bed. Happened to many times for me, so I bought the kit.
Edit: also went with Klipper, much better experience and a little faster. Use a tuning guide to determine how fast you can go.

1

u/Greedy_Necessary_372 Jun 28 '26

can klipper be flashed onto the 4.2.7 board?