@laakti from the top of the printer, the organisation of the steppers should be as follows
back l Y r e / \ i f X-----Z g t h front tPlease see https://docs.duet3d.com/en/User_manual/Machine_configuration/Configuration_linear_delta for the in depth documentation on setting up a delta and https://docs.duet3d.com/en/User_manual/Tuning/Delta_calibration for the ensuing calibration.
you may want to refer to http://boim.com/DeltaUtil/CalDoc/Calibration.html to understand typical error cases and how they would affect the mesh, to address them.