Assisted Bed Leveling (Tramming) (4 point) - ThomasToka/MarlinFirmware GitHub Wiki
Step 1. Compress springs
With the machine off, move all the wheels on the bed to compress the springs fully, until you cannot turn them anymore, but do not force them or you can break them
Step 2. Back out springs
Back each out 1.5 - 2 turns
Step 3. Power on
Turn on machine. You can start here if you have leveled / trammed while doing 1 and 2 before.
Step 4. Warm Bed
Warm the bed to the temp you are using or 60 C
Step 5. Warm Nozzle
Warm the nozzle to the temp you are using or 200 C. You can click on the blue numbers on the home screen to set the temps.
Step 6. Wait
Wait 10-15 minutes after everything is to temp
Step 7. Home Z
Home Z
[!TIP] Ready -> Home Button
between the up and down arrows
Step 8. Manual Menu
Go into manual level. (AUX. LVL.)
[!IMPORTANT] do not go into CR touch
Step 9. Adjust Z Offset
Adjust z offset on point 1 using the paper trick or a feeler gauge of 0.1 mm
Press the up arrow on 0.05 until you can see space between the bed and nozzle. Slide the paper / feeler gauge under the nozzle and press the down on 0.05 or 0.01 while moving the paper / feeler gauge. Adjust the z offset until you feel slight resistance on the paper / feeler gauge as you pull on it while keeping it straight.
Step 10. Autorun
Go into Manual CR-Touch level, then "Assisted", and run "Autorun". Adjust until the points are all close to each other. Each corner will tell you an estimated fractions of a turn to bring into level. These will be given in turns and minutes. Think of the minutes as you would the movement of the minute hand on a clock face. (e.g., 15 minutes = 1/4 turn)
Keep running "Autorun" and adjusting until the points are close and the "Down/Up" tells you "0 turns & 0 minutes".
[!TIP] Spend as much time on this as possible to get the 4 corner points as close as possible. This will pay off when going to print. The adjustments will get smaller and smaller as you go along.
If points 2, 3, and 4 are lower than point 1 but close to each other, then you can lower point 1 to maintain tightness of the springs. Point 1 is what the other three are compared to for the turns/mins listed after an autorun.
Step 11. Repeat Autorun
Run the autorun on the CR touch a few times and watch the numbers. They should stay close to each other and not jump around by large margins. They will change every single time you run the autorun, but as long as they stay close you should be good to go.
Step 12. Home Z
Home Z
[!TIP] Ready -> Home Button
between the up and down arrows
Step 13. Manual Menu
Go into manual level. (AUX. LVL.)
[!IMPORTANT] do not go into CR touch
Step 14. Adjust Z Offset
Adjust z offset on point 1 using the paper trick or a feeler gauge of 0.1 mm
Step 15. Run auto level
Go into auto level and run it
STEP 16. Test print
Go and print what you are printing. Use M420 S1 Z10 after G28 in your gcode to use the saved mesh taken in step 15, or use G29 after G28 in your gcode to take a new mesh every time you print. I suggest printing 3D Benchy (at least the first 4 layers) and checking the words on the bottom to verify your Z offset. Below is a example of the Z offset being perfect. You may see the lines in the first layer. You should be able to catch your finger nail in the lettering. If you are unable to catch your finger nail in the lettering and/or the lettering looks thinner than the given image, then the nozzle is too close to the bed. Adjust the Z offset by raising it by 0.05 and print again. If the lines in the very first layer have space between them, then the nozzle is too far from the bed. Adjust the Z offset by lowering it by 0.05 and print again. You can use 0.01 to fine tune the Z offset to your liking.
[!NOTE] ignore the cat hair...