Duet/Duex Board Z Axis moving the Wrong Direction

Hey,

I am setting up my Duet/Duex Board, being a bit of a novice probably not helping.

For the X Axis and Y Axis I have no issues, everything is perfect.
but for the Z Axis I have a end stop which is a Min End stop not a Max End stop like the X/Y Axis.

My config.g file has the following

M574 X2 Y2 Z1 S1 ; M574: Set endstop configuration

M208 X405 Y450 Z500 S0 ; set axis maxima and high homing switch positions (adjust to suit your machine)
M208 X0 Y0 Z0 S1 ; set axis minima and low homing switch positions (adjust to make X=0 and Y=0 the edges of the bed)

I homes to the correct direction, which is great.
But when I Tell the Machine to move +0.5mm on the Z Axis, the machine still moves in the wrong direction.
Am open to advice and suggestion please.

thanks in advance.

If the Z axis moves in the wrong direction, you can reverse it by changing S1 to S0 or vice versa in the M569 P2 command in config.g.

If that gets the X axis moving in the right direction when you command the head up or down, but it then moves in the wrong direction when you try to home the Z axis, then your homing files need to be changed and I suggest you post your homez.g file.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

The homing is going the correct way, changing the M569 was the first thing I thought of myself.... but discounted this when changing it moved the bed to home in the wrong direction.
Currently the Bed is homing on the Z Axis in the correct direction, once homed, if I select the move +0.05 it moved into the Head instead of moving away from the Head.

Attached is the homez.g file as suggested.

You need to change M569 to get the bed moving in the right direction, and then fix your homez.g file. The current one is completely wrong because you are trying to go to Z=0 in absolute mode before the printer knows where the head is. Use something like this:

G91                ; relative mode
G1 Z-240 F500 S1   ; move up to 240mm in the -Z direction, stopping if the homing switch is triggered
G1 Z4 F60          ; move slowly 4mm in the +Z direction
G1 Z-10 S1         ; move slowly 10mm in the -Z direction, stopping at the homing switch
G90                ; back to absolute mode

Edited 2 time(s). Last edit at 09/06/2015 05:10AM by dc42.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

thank you so much.
that has fixed it.