Y stepping gone wrong

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  • 3D Printer Model: Tevo Tarantula / Marlin
  • Slicer: Cura
  • Hardware Setup:PC using Repiter Server, USB cable, Tevo Tarantula running Marlin
  • Problem description: I have been printing with this machine for four/five years with no problems, but yesterday, after succesfully printing one object,
    PXL_20240413_115744463
    PXL_20240413_1157444631920×3413 460 KB

I cleared the bed, re heated the bed and nozzel and re started the same G code as I had just used, and this happened!

PXL_20240413_115754587
PXL_20240413_1157545871920×3413 459 KB

Instead of printing each layer on top of the previous, it is stepping them (backwards)

  • What I tried: I have checked for slipping belts and runner problems and there does not seem to be any mechanical problems. I have re booted the printer and the PC

Any help would be apreciated.