Till

The programmer looks good and even supports the original ST flashing software (not all clones do that). If you power the board from another source, I recommend not to connect...

Just thinking, maybe it is easier to enable "advanced pause" in Marlin and do a home-after-change? Normally, the homing precision is better than 0.05mm with standard mechanical endstops (short lever...

@AbeFM I can feel your pain with the programmers. I have various stlink clones, an original stlink v3 and a bag full of converted black magic probes (you can convert...

@nhabes79 You can try to flash my compiled binary from this [thread](https://github.com/bigtreetech/BIGTREETECH-S42B-V1.0/issues/3#issuecomment-691197566) in case you still run into issues with your compiled one. https://github.com/bigtreetech/BIGTREETECH-S42B-V1.0/files/5210515/S42B_fw_P30_I10_D200.zip My default was P30 I10 D250...

In case, you want to temporarely convert your cheap stlink v2 clones to a blackmagic probe: https://github.com/sakana280/stlink-tool Worked for me right out of the box. Powercycling removes the BMP upgrade....

No problem @nhabes79. Obviously, you do not need a blackmagic probe or anything fency as your clone is working with the ST link software (many stlink v2 clones do not...

@caesar1111 are you sure, that this is really XY is overshooting and this is not just overextrusion because of low Jerk/Acceleration at corners? This overextrusion is typical for FDM, if...

Ok, with a volcano this non-linear effect is even more pronounced. BTW, the testcube is maybe not the best object to test for acceleration and jerk as you need some...

@nhabes79 There is one more thing to try as I ran into this for an MKS servo42b recently. In settings decrease the communication speed to 240kHz and set it to...

To get back to the orignal topic and close this. I tested now several hours with 0x00 instead of 80 (0d80) to get ~270kHz of display com speed and away...