Steppers skip when toolhead tries to move to primeblob location

This is a working printer that stopped working. When printer does a primeblob, the xy steppers skip and causes gantry to crash after prime blob. I tested it just using the primeblob macro and it changes the printer velocity setting to 18,000 mm/s then resets to 300 after priming. The printer was fine before and I have made no recent changes. It's on 2.1.0 RC 2. This printer has been running fine for a couple of years. Thanks in advance!
3 Replies
steeevio
steeevioOP4d ago
I should also mention that the speed would increase during a print job after priming. On one occasion, the printer successfully primed and started the first layer. It printed the first two parts ok but when it moved to the third part, it skipped, so the second layer was shifted. It seems to try to move too fast when the toolhead moves to the next part. I have observed the velocity setting change on the dashboard to 18,000 mm/s during priming and non printing moves. here are the cfg files just in case.
steeevio
steeevioOP3d ago
Here are a couple of videos that show what is happening. Notice the velocity change on the dashboard when primeblob is initiated. https://drive.google.com/file/d/1n3BpTYGblGcgQc61qKxI8OYNRAN5rlwv/view?usp=drive_link https://drive.google.com/file/d/1ZUK_ZErH7kDJCLgrK1C6iJ4b8zwCRCbo/view?usp=drive_link
Google Docs
IMG_3483.MOV

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