A well leveled printing build plate is essential to get good prints. That’s why its very important to know how to level the bed. This process is rather simple if we know how to do it. And if the printer does not suffer bumps or does not work too much to detach the prints, this adjustment resists for a long time.
Just to keep the plate well leveled we recommend, where possible to print on glass/mirror. So that it is easy to remove and eventually the efforts that we will make to detach the print from the glass will not affect the adjustments of the printer.
It is certainly possible to use an over-bed of metal, but remember that the metal can undergo more pronounced deformations than the glass, and a deformed plate is impossible to calibrate.
In general if your prints do not stick to the bed or, better, they stick in a particular place to detach themselves from other parts, or we notice that the first layer of printing is very thin (or very thick) in a particular point of the plane. Or, if you see plastic on the tip of the nozzle dragged around by the extruder you will probably need a careful adjustment and flattening of the plate.
Now, we will see the main steps of the levelling of the printing bed.
How to level bed: Step 1
First, make sure to have the printing conditions that we use or would like to use (if the first calibration). Then insert the over-plate (glass, mirror, metal or blue tape or other) and bring the plate to temperature (PLA: 0° to 50° and ABS: 80° to 120°).
The purpose of the calibration is to have the same distance between the nozzle and the platter. So we have to make sure that the calibration is done with the same properties as when we are actually printing.
How to level bed: Step 2
As a second step, the flat adjustment screws should be pulled as far as possible. After this operation we decide (if it is not pre-installed) where to place the end stop. Place it leaving about 5 mm between bed and nozzle.
We turn on the printer and send it to the Z home.
If the printer has a level probe the procedure is similar. The only difference is that we can not even pull the screws of the plate up to the bottom.
In fact we could always approach or turn away nozzle to bed using Z-Offset.
Remember going negative on offset let nozzle approach to build plate. Positive send it away.
How to level bed: Step 3
It is necessary to obtain a normal sheet of paper from a notebook. A piece of paper measuring 5cm x 10cm is also sufficient. Normal notebook paper measures about a tenth of a millimeter, and that’s exactly what we need!
How to level bed: Step 4
The plate must be brought into contact with or very close to the extruder nozzle.
In this situation, insert the paper between the plate and the nozzle. The paper should not pass very easily (the nozzle will still be too far away). And it must not block or crumple (in this case it will be too close).
The paper must be able to move but we will have to feel a slight resistance. In this case the space between the nozzle and the plate will be perfect. This adjustment should be made by always acting on the adjustment screws at the corners of the plate or on the knobs in charge of the movement of the bed.
Now, with the practice of point 4 we will have to move the extruder (by hand or by software) in the plate, through an ideal grid and repeat the operation at least 12/16 times. In the points indicated in the photo. (If we move the extruder by hand, with the printer off, remember not to move it too fast, at the cost of causing damage to the motor that moves it normally).
Once step 5 has been completed, check the work carried out by selecting 5/10 random points on the plate. Check that the sheet in the given point passes in the same way as the set points. If the adjustment has been made with care and if there is no deformation of the plate, this test will be successful. Otherwise we have to start again from the beginning!
As a last check you can use any stl file, better if it occupies a good part of the bed. Now start the print, and stop when the first layer is completed. Verify if it is a smooth first layer, with the same color intensity and the same height in all its points.
HERE IT IS A FILE MADE FOR: https://www.thingiverse.com/thing:2985433
Just chose right size for your bed!