Either I am over simplifying things, or this thread is being way over complicated. I will test this afternoon to find out. From what I see, the machine has a spring in the z axis to prevent damage to the LCD screen should a part become dislodged and get mashed under the build plate. When pressing the autolevel button, the machine uses the auto limit optical switch to move to the zero position according to the optical sensor and then you lock the build plate. My understanding is the problem is that depending on the mounting of the optical sensor, the z axis can be off by a small amount and the spring already slightly compressed resulting a a few initial layers all printing in the same space until the spring tension runs out.
This thread details the solution as unlocking the set z=o parameter and then manually adjusting the variance each time you level the bed and resetting the z(home position). Why would you want to do this each time when you can just set this statically in steps in the configuration?
Example: I already printed a 20mm cube on my printer because i noticed detail parts were off a little. My cube is 19mm. you can see a bit of squish on the bottom too. Instead of doing this every time can you not just put this directly into the gcode configuration via parameter M8083 and M8084? This is what you are configuring already, but doing it each time, it is not static.
and plug that into parameter M8084 ( as negative(-) to move the build platform up 1 mm at print start):
;; ¡¾Z limit point and zero limit difference, the value is usually positive value¡¿
M8084 Z-1 ; If you want to set the offset in the configuration, please remove the semicolon in front of the line command, and you can also automatically configure the offset by setting Z ;to zero on the int
I'll test another cube today, but if i am understanding these parameters correctly, you machine is now calibrated and all you have to do is level like normal each time and print. Am I missing something?
EDIT: This is the correct way to change the calibration and works PERFECTLY---however I have the sign on the z access wrong. The printer prints in -Z access so the correct Z access offset should be -1 for 1mm. I have adjusted it above to avoid confusion. Looks like the setting is in fact in mm. Just tested and confirmed by pressing print and measuring the starting point with a caliper with the resin vat set aside. Values updated above. In summary, the leveling routine always uses the 0 position read from the sensor, but parameter M8084 tells it to start the print job with the build plate moved relative to the mechanical 0 position. (-) is up!!, This gives you back your layers that were missing (squashed) at the base.. This is similar to the method described above, except we are just putting the setting statically into the configuration using parameter M8084.
Proof is in the pictures. All I did was measure the first cube, put the difference (-.87) into the machine definition(M8084), install the definition and reprint the cube.
![[Image: jVoNASG.jpg]](https://i.imgur.com/jVoNASG.jpg)
This thread details the solution as unlocking the set z=o parameter and then manually adjusting the variance each time you level the bed and resetting the z(home position). Why would you want to do this each time when you can just set this statically in steps in the configuration?
Example: I already printed a 20mm cube on my printer because i noticed detail parts were off a little. My cube is 19mm. you can see a bit of squish on the bottom too. Instead of doing this every time can you not just put this directly into the gcode configuration via parameter M8083 and M8084? This is what you are configuring already, but doing it each time, it is not static.
and plug that into parameter M8084 ( as negative(-) to move the build platform up 1 mm at print start):
;; ¡¾Z limit point and zero limit difference, the value is usually positive value¡¿
M8084 Z-1 ; If you want to set the offset in the configuration, please remove the semicolon in front of the line command, and you can also automatically configure the offset by setting Z ;to zero on the int
I'll test another cube today, but if i am understanding these parameters correctly, you machine is now calibrated and all you have to do is level like normal each time and print. Am I missing something?
EDIT: This is the correct way to change the calibration and works PERFECTLY---however I have the sign on the z access wrong. The printer prints in -Z access so the correct Z access offset should be -1 for 1mm. I have adjusted it above to avoid confusion. Looks like the setting is in fact in mm. Just tested and confirmed by pressing print and measuring the starting point with a caliper with the resin vat set aside. Values updated above. In summary, the leveling routine always uses the 0 position read from the sensor, but parameter M8084 tells it to start the print job with the build plate moved relative to the mechanical 0 position. (-) is up!!, This gives you back your layers that were missing (squashed) at the base.. This is similar to the method described above, except we are just putting the setting statically into the configuration using parameter M8084.
Proof is in the pictures. All I did was measure the first cube, put the difference (-.87) into the machine definition(M8084), install the definition and reprint the cube.