I shall look into it and maybe post some updates if I go ahead

@droftarts That video has more or less sold the Mercury One.1 upgrade, I have a Titan aero on the tool head which they cater for, and the rest shouldn't be that more to purchase, the linear rails being the biggest expense.

Out of interest has anyone tried a duet board with this build? Thinking of upgrading my Ender 5. I see that the build is shown as using Klipper. I know it shouldn't make a difference. It looks like a neat project. If anyone has built it I would appreciate any feedback before I commit.

@engikeneer Thankyou for your time the Z axis is now solved.

Thanks for explaining it, I can see where I went wrong. Now I can start to fine tune.

@engikeneer Thanks for the help.

Here is my Homeall.g. My Z endstop is at the top. Ender 5 homing position is back right top. Should the origin be changed to reflect this? I searched the web but there isn't much on an ender 5 with RepRap.

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Mon Apr 19 2021 11:35:36 GMT+0100 (British Summer Time)
G91                   ; relative positioning
G1 H2 Z5 F7200        ; lift Z relative to current position
G1 H1 X225 Y225 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X-5 Y-5 F7200   ; go back a few mm
G1 H1 X225 Y225 F360  ; move slowly to X and Y axis endstops once more (second pass)
G1 H1 Z305 F360       ; move Z up stopping at the endstop
G90                   ; absolute positioning
G92 Z300              ; set Z position to axis maximum (you may want to adjust this)

; Uncomment the following lines to lift Z after probing
;G91                  ; relative positioning
;G1 Z5 F120           ; lift Z relative to current position
;G90                  ; absolute positioning

@engikeneer Hi,

changed motor direction and back again as this is correct. Here is a copy of my home and endstop code. Homing does appear to be fine? And from 14 onwards the start of the print code.

code_text
```; Axis Limits
M208 X0 Y0 Z0 S1                               ; set axis minima
M208 X234 Y220 Z300 S0                         ; set axis maxima

; Endstops
M574 X2 S1 P"xstop"                            ; configure active-high endstop for high end on X via pin xstop
M574 Y2 S1 P"ystop"                            ; configure active-high endstop for high end on Y via pin ystop
M574 Z2 S1 P"zstop"                            ; configure active-high endstop for high end on Z via pin zstop




;FLAVOR:RepRap
;TIME:641
;Filament used: 0.312352m
;Layer height: 0.1
;MINX:104.2
;MINY:97.2
;MINZ:0.3
;MAXX:129.8
;MAXY:122.8
;MAXZ:10
;Generated with Cura_SteamEngine 4.9.0
T0
M190 S60
M104 S200
M109 S200
M82 ;absolute extrusion mode
G28 ;Home
G1 Z10.0 F6000 ;Move the platform down 15mm
;Prime the extruder
G92 E0
G1 F200 E3
G92 E0
M83 ;relative extrusion mode
G1 F1500 E-6.5
;LAYER_COUNT:98
;LAYER:0
M107
G0 F3600 X106.08 Y99.922 Z300

I allowed it to run on and can now say that either the slicer or the firmware thinks that the Z axis 0 is in the middle of the Z carriage. The Z axis lowered to the middle and the print began? Also the Z axis homes as it should at the top.

@engikeneer Thanks for the reply, I thought as much but can't figure how to correct it? Do I reverse motor?

Hello, could a mod possibly move this to the correct category. This is not really tuning and tweaking as the printer is not working.

Hi,

I've been away from 3d printing for a few years. I am now back but I'm having to update myself on the many changes. I have an Ender 5 with a Duet 2 Wifi and a Titan Aero extruder.

After many days I have got to a point where I am trying to print a calibration cube, so I can fine tune. However when ever it starts the Z axis is getting told to start at the bottom (0.3) instead of at the top (299.7). I know I am missing something as I shouldn't and wouldn't go through the entire print code and change the Z axis co-ordinates.

Here is my config:config.g

I'm sure someone knows where I'm going wrong.

Cheers