Hi Robert, thanks for the advice but I have been through all of the grub screws and they are all nice and tight. I have just reinstalled the firmware over from Cura and will run another minicaltest print to see what the verdict is.
In an unrelated incident I have also noticed that if I set the bed temperature to 110c, it will take approximately 30 minutes to get to that temperature usually hovering around 96c for a long while. Some times the temperature wont climb past 96 and I have to settle for printing at that temperature. I have researched on this forum into bed heating problems and have checked the solder joints which all look ok to me...
It could be that your pulleys aren't secured properly. Check the set screws and make sure they're nice and tight.
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