Bambu Lab A1 Common Issues

Issue 1: Too low Z Offset / Wrong Temp for PETG

Problem with Z Offset + Temperature + Max Volumetric speed

 

Filament: PETG

Printing Speed Mode: Luminous
Z Offset: 0.06 / or could decrease by 0.05 if you want to test best fit for more filament 
Temp: 265
Max Volumetric Speed: 12 mm3/s

;===== for Textured PEI Plate , lower the nozzle as the nozzle was touching topmost of the texture when homing ==
;curr_bed_type={curr_bed_type}
{if curr_bed_type=="Textured PEI Plate"}
G29.1 Z{0.06} ; for Textured PEI Plate
{endif}

Result: Good Print Surface

PLA 

Z offset: 0.03

Calibration: Calibrate Your Filament Before Usage

Learn here

Change the K Value to : 0.03 and the value step: 0.001

Pick the best line which has good k factor for the printer

Same thing with the flow calibration:

Adjust your flow ratio in the project filament and save it.