How To Set Z Offset In Marlin
Z first setting is ane of the most common operations we notice ourselves doing on a printer. At least every time we change something. For example we supercede the nozzle with a slightly different i or we redo the level of the plate.
Not always by bubbling the plate nosotros can observe the correct distance betwixt nozzle and bed, which guarantees us a first layer as shine and precise as it should be. Sometimes it'due south merely a piddling chip farther away, others, as in the case of the photograph we're very far away.
In order to overcome this problem and to find the optimal distance, it is necessary to adjust the Z Offset .
Z Get-go Setting
A calibration required when installing the BLtouch or an anterior probe is e'er used when there is a discrepancy betwixt where the nozzle is and where it should be. This parameter regulates the distance between the nozzle and the plate, vertically.
You can calibrate the first in several ways. Here nosotros'll see some of them.
Set Z Offset via PC
You tin follow this guide to connect the printer to the PC via Repetier. Once connected, from the control window of Repetier Host, you must insert some strips of Gcode.
You lot tin can see the whole sequence hither:
- M851; By entering this command, the printer volition respond with the offset preset in the machine. To start with a neutral situation you should take it to goose egg. And so without any offsets. To do this, enter M851 Z0 and your get-go will be fix to nothing.
- G28; This command will return all axes to home position. Then "G1 Z0" moves the z-centrality to the aught position. LCD display should show Z = 0
From this position you will already realize if the nozzle is too close or far from the plate and always through G1 X0 Y0 Z (negative numbers to lower, positive to heighten; always motion 0.1 at a fourth dimension).
And then slowly lower the Z-axis until the nozzle is at the correct distance from the printing plate. You tin use the same slice of paper y'all used for the level to measure out the nozzle-dish distance. One time you have found how far the nozzle has had to descend to exist in the right position, enter the number plant equally the offset.
If, for example, you had to become downwardly past 0.viii, then you will set the new starting time as follows: M851 Z-0.viii.
Don't forget the M500 command, as always, to save the value on EEPROM!
Rough Method
Another method similar in substance, just which perhaps guarantees greater precision, is to mensurate, past means of thicker gauges, or past middle, the presumed nozzle-flat distance. Prepare the beginning, using the method described above, at the causeless distance and first printing a cube that holds most of the plate. From here we analyze the line of the first layer, and nosotros see, based on that how to modify. start 3 or four prints will probably exist enough to have the correct first value, this time not theoretical just already practical to practice.
NOTE: If there is a mechanical push button-button end stop, nosotros cannot fix a negative commencement, because this is a physical shield. At well-nigh nosotros tin push ourselves to a -0.2 but hardly that's enough. So we're gonna have to physically human action on the printer, and nosotros're gonna have to go two ways.
The first is the lower end-finish shift. Obviously taking all the necessary precautions, i.e. to practise it measured and without exaggeration, otherwise the nozzle will crash into the plate at the next home z. The 2d is to progressively unscrew the screws of the plate until yous have the right distance. If we practise this, we will impress a cube the size of the plate with five perimeters, not simply will nosotros detect the right distance, but we volition also adjust the level in an infallible way.
Setting the first from the slicer
The same gcode command we talked almost before (M851 Z#,# ) can exist inserted in the boot Gcode space. Too in this example the launch of some print will let the states to determine the right value. Until we become to modify the auto we tin can leave information technology preset.
This method is smashing considering you can solve the problem Z Outset effortlessly. But if there are more than than i machine, we will have to remember to go and change this value for each printer. And a stupid forgetfulness could result in the loss of even the most important cloth.
From the display go to the Carte du jour
Surely, if the firmware allows it, going to change the starting time from the keypad is the easiest and painless method.
In Marlin for instance, just become to Command -> Motility -> Z-OFFSET. Here we volition find a value, which will not necessarily exist zero. Now, as usual, move to higher values, then in positive will move away nozzle and plate, while smaller values, moving in negative will bring us closer.
Permit'southward simply remember to save the data in EEPROM once we accept found the right value. The keypad salve is located in the start menu!
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Source: https://www.easy3dhome.com/z-offset/
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