CloClo F-Tower (Flow rate Tower)

… and obviously after the towers for temperature and speed, here comes the tower for checking the filament flow rate.
The principle for printing the model is very similar to those of the S-Tower and T-Tower, i.e. you must access the g-code of the printer used and add a few lines of code at the beginning of the Layer change section.
(Otherwise download the RAW model from the STL section of the download menu and open the file with bambu studio/orca slicer to directly have the gcode inserted in the right layers).

In the table below you will find 2 codes with different values to allow you to calibrate in 2 steps. The first code will in fact allow you to verify the differences between 120% and 80% of the current value.
However, I recommend setting the flow value to 1.0 before printing the model and checking the various levels. Once you have made your choice, simply calculate the new value according to the formula you will find under the codes and replace it in the "flow ratio" field of the filament in use.
After that, if you want to refine the value , you can use the second code (replacing the previous one) which will calculate a value between 104% and 96% of the flow found previously.
Sometimes it is not easy to choose which value suits best, many will be similar and will have little difference; at this point divide the model into the various sections and measure the wall thickness with a caliper : it must get as close as possible to a value of 0.40mm.
You can see some measurement examples in the attached photos...
During the tests I carried out with an A1mini and an X1c, I was able to verify that the factory values of the Bambulab filaments are rather well calculated but, using other brands, other types of plastics, silk or matte, with fibers and different colours, the values of the flow can vary considerably.
Obviously this is not a scientific method, not precise to the hundredth of a millimetre, but the results obtained will be very helpful in printing, especially in those where tolerances and precision are most required.
And now here are the codes to enter:
 

• Once the printing is complete, carefully examine every detail of the model and judge the shelf that seems best to you (look at the presence of over/under-extrusion, the precision in the corners, the smoothing of the circular part, the quality of the overhanging, the consistency of the layers, stringing etc ...).
  The Flow set in your profile is that of the "100%" shelf (you shouldl have set it to 1 before)
  Find the percentage X% on the shelf you prefer and calculate the new flow based on that percentage using the formula
  NewFlow=X%*OldFlow/100.

• Example: if the best shelf is -105% and your "flow rate" speed was set to 1 we will perform this calculation:
  NewFlow=(105*1)/100 and we will find:
  NewFlow=1.05

  This is the value to insert in the flow rate case of the filament setting.
   

For problems, suggestions or everything else, don't hesitate to contact me in MP, It will be a pleasure to talk to you !
 

Happy printing and calibration!!

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