Like in the title, I noticed that my printer does not use k factor value during printing.
I have made multiple tests, and all test samples looks the same. Finally I printed one with k value 0.017 and second 0,2. Both printed samples are the same.
On attached photo, rectangle on the left is with 0,017 k factor, on the right 0,2. I turned off auto flow dynamics calibration before print.
Author reported this bug to Bambu support and they acknowledged that this problem exist and they will fix it in new version of printer firmware. And they did it in 01.03.01.00 version.
I have the latest firmware so I shouldn’t have this bug… I have created a ticket on support but in the meantime I wanted to ask if anybody with this firmware has same problem?
I have the latest fw also and I noticed that my corners are bulging out like mad. Tried to do a calibration pattern, changed K factor but the corners in the print are still the same…
When you turn on “automatic flow calibration” before print, it changes the k factor and the result is better but clearly manual changes are not taken into account by the printer.
Attaching pictures of the same print before calibration and after
Bambu support answered my question moment ago. They suspect that there is a bug in Bambu Studio when sending the K-value parameter, which may cause the K-value to not be set successfully.
They send me new start G-code to see if it resolves the issue. But when I compered their gcode with my current they are identical.
I have an update. BambuLab support sent me Start G-code that fixed the issue. I can share it here but they wrote that they are still investigating and addressing the root cause of the issue. Modifying the Start G-code is just a temporary solution and not the most convenient solution. They will work on a permanent fix in the future.
Below I compared my Start G-code (left side) with the new one from BambuLab support (right side):
You can set k factor in filament preset. Bambu ask me to do some test prints and send logs. I hope they will fix this soon.