Here's an idea of what's going on. This is a picture of the progress during the first layer:

Picture of the progress during the first layer

Printing a simple calibration square, and as you can see, my X-axis is not moving like it should. I turned my speeds down from 30 mm/s to 5 mm/s and this is the result.

What happens:

  1. Printing starts after homing and proper temperatures have been reached.
  2. Starting from lower left, printing starts, filament pushed out.
  3. X-axis motor is told to move, but it doesn't. Takes 0.5 seconds to think about the given order and only then moves. By now, a smudge of filament has been pushed into a blob at the start corner but the move is executed at a proper speed. Reaches "destination" and stops moving. This has resulted in too short of a face for X-axis.
  4. Y-axis receives the order to move and does so properly. Lower left corner is done properly due to Y axis moving instantly.
  5. Y reaches it goal destination, X receives orders to go to left. Lags behind, filament pushed out creates a smudgy corner due to lag. Reaches "destination" (lag is the same so it creates a regular pattern)
  6. Y receives orders to go back to start coordinates and does so.

And this can be seen on the diagonal lines. Y moves constantly, X lags behind so it creates those vertical lines.

No idea what's causing this and causing a bit of a headache.

Things I've tried:

  • Slowing down
  • Calibrations
  • Adjusting belt tension
  • Different COM port
  • Printing from SD card
  • Tightening the pulley teeth onto the stepper motor

Getting this far was already a pain and now I'm kinda stuck.

  • $\begingroup$ Is this a new printer to you, or have you had it working fine in the past? $\endgroup$
    – fred_dot_u
    Commented Feb 21, 2021 at 1:22
  • $\begingroup$ If you try to move the head when the X-stepper is enabled, then the print head sits still? $\endgroup$
    – dotswe
    Commented Feb 21, 2021 at 1:53
  • $\begingroup$ @fred_dot_u It was working fine when I last used it but that was a long time ago. $\endgroup$
    – Exce
    Commented Feb 21, 2021 at 2:49
  • $\begingroup$ @dotswe No. The head will move instantly as commanded. Which makes this really weird. $\endgroup$
    – Exce
    Commented Feb 21, 2021 at 3:05
  • $\begingroup$ at first glance, your z-height is improper. The filament should be flatter, implying the bed should be higher or the nozzle lower, depending on the mechanical portion of the printer. Consider to re-calibrate (re-zero) and re-level the bed. $\endgroup$
    – fred_dot_u
    Commented Feb 21, 2021 at 12:16


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