Line tracking calibration on maqueen v3.0

We have 10 maqueen v3.0.
On our selfmade line tracking charts (size A0) we have a problem.
The lines created by the plotter are Not as black as your printed version so some of the maqueens does not follow the track correctly.
Is there a way (or python program) that can calibrate the line tracking on the V3.0 so that it recognises the plotter craeted lines?
2022-09-20 00:19:41
jenna
It is recommended to recalibrate the sensor on your own map.
Line-tracking Sensor Calibration:
https://wiki.dfrobot.com/micro_Maqueen_for_micro_bit_SKU_ROB0148-EN#target_6
