Modified Ender 5 - Z Axis lowering at start of print

Hello,

After a long break I finally put the parts onto my Ender 5 - Duet 2 wifi board, Titan Aero hotend. I have taken a few days to familiarise myself with RepRap and the new Duet firmware. I thought I had got myself to a point where I could print a test cube and start to fine tune. However when ever I start the print the Z axis lowers itself to the bottom and tries to start the print at 0.003 instead of at the top 299.7.

I am using Cura 4.9. I have used an Ender 5 profile as well as a CFFF profile, but both give the same result.

Start Gcode :

G28 ;Home
G1 Z10.0 F6000 ;Move the platform down 15mm
;Prime the extruder
G92 E0
G1 F200 E3
G92 E0

Config: Attached


What am I missing?

As the bed goes down, the nozzle is going up. Your Z axis is inverted. The "top" is where the nozzle touches the bed. That's Z=0. The coordinates are always from the print's point of view.

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Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]

Thanks for the help. Now sorted.