Core XY weired behavior of the Z-Axis and Endstop config

Bipotronic

I put in the G-code "G0 Z295" in the console and nothing hapend. No error Messages only "G0 Z295" cloered in Green.

Also weired, if i send "G1 X20 Y20 F2000" the X-axis and Y-axis move, but if they are positioned the Z-axis moves also.

Veti

@philipp-r said in Core XY weired behavior of the Z-Axis and Endstop config:

, but if they are positioned the Z-axis moves also.

what do you mean by positioned?

your M92 has Z650.00. this is a unusual number.
what lead screw do you have?

Scachi

Where is your M584 drive mapping line ?
https://duet3d.dozuki.com/Wiki/Gcode#Section_M584_Set_drive_mapping

Veti

the M584 is not required if the default mapping is used.

Scachi

@veti said in Core XY weired behavior of the Z-Axis and Endstop config:

the M584 is not required if the default mapping is used.

Ah, thank you for this information

Bipotronic

I use a precision Ballscrew with a 5mm pitch without a gear.

Bipotronic

@veti i ment, when i send the G-code "G1 X20 Y20 F2000" the X and Y-axis move to the position X20 Y20... after they reached this position the Z-axis will also begin to move without any commend used.

Veti

@philipp-r

that is very strange behavior. in which direction does it move? how far does it move?
do you have a config-overwrite file?

how many motors does your z axis have. how are they connected to the duet?

deckingman

@philipp-r said in Core XY weired behavior of the Z-Axis and Endstop config:

I put in the G-code "G0 Z295" in the console and nothing hapend. No error Messages only "G0 Z295" cloered in Green.

Also weired, if i send "G1 X20 Y20 F2000" the X-axis and Y-axis move, but if they are positioned the Z-axis moves also.

The lack of Z axis movement can be explained by the fact that you have set the maximum limit to 0 and the minimum limit to 300.

"M208 X425 Y343 Z0 S0 ; Set axis maxima
M208 X0 Y0 Z300 S1 ; Set axis minima"

Change that to be:

M208 X425 Y343 Z300 S0 ; Set axis maxima
M208 X0 Y0 Z0 S1 ; Set axis minima

You have defined the Z axis end stop to be at the high end (Z max)

M574 X1 Y1 Z2 S0

Is that intentional? Do you really have that end stop at Z max?

Veti

@deckingman said in Core XY weired behavior of the Z-Axis and Endstop config:

The lack of Z axis movement can be explained by the fact that you have set the maximum limit to 0 and the minimum limit to 300.

good catch. but why would that cause z movement after x and y movement?

deckingman

@veti said in Core XY weired behavior of the Z-Axis and Endstop config:

@deckingman said in Core XY weired behavior of the Z-Axis and Endstop config:

The lack of Z axis movement can be explained by the fact that you have set the maximum limit to 0 and the minimum limit to 300.

good catch. but why would that cause z movement after x and y movement?

I didn't say it would - I was very careful in my choice of words

I suspect that Z movement may be something else, but the OP should at least put the axis limits right first.

Bipotronic

@deckingman thanks for your answer.

Your right i changed it and the lack is gone.

Yes i did thet intentionaly, because the endstop is at the lowest position the bed can reach. Related to the printhead this is the max Position. I also chose the right hand rule for thze coordinate frame.

I want to tell the machine if the Z-axis hits the endstop, it is position 300mm. But however i change the M208 command i did not get the right position.
When i home the Z-axis and type in 300mm into the Machine setting/Headposition at the left corner at the Web interface, the machine behaves like i want it to.
Does anybody know if i can save this kind of input or which M-command i should use to get the same Result.

Bipotronic

@veti

list itemit will move downwards until it hits the endstop again.
no i don't have an config-overwrite file
i use only one motor and its puged in at the Z-axis spot on the duet2ethernet

Veti

i would suggest you start without the z max for now and try and get the machine working.

use the probe for now to determine z=0.

determining z=0 from a z max endstop is not that easy.

dc42

Do you have the direction of your Z motor correct? If the bed moves in the Z direction (not the print head), then increasing Z should move the bed down. The Z coordinate is the distance between the print head reference point and the bed.

Phaedrux

0_1563819506187_e5c637cd-7710-416e-93d6-eefb576f0824-image.png dbot axis.png

Does this make more sense?

Bipotronic

@dc42 yes when i increase the Z value the bed moves down. I checked the direction of all axis they are correct.

is there a change that there is something wrong with the board?

Bipotronic

@phaedrux said in Core XY weired behavior of the Z-Axis and Endstop config:

dbot axis.png

Does this make more sense?

Thank you for the picture. This is exactly like i set up the Z-axis.

oliof

I want to tell the machine if the Z-axis hits the endstop, it is position 300mm.

So if you have M208 Z0:300 (or the moral equivalent), if you run G1 Z350 H1, what happens?

Bipotronic

@oliof said in Core XY weired behavior of the Z-Axis and Endstop config:

I want to tell the machine if the Z-axis hits the endstop, it is position 300mm.

So if you have M208 Z0:300 (or the moral equivalent), if you run G1 Z350 H1, what happens?

First i homed teh Z-axis (M208 Z0:300 is configured). At the Webinterface in the field "Machinestatus/Headposition" the Z value is = 0.
Then i type in your G-Code "G1 Z300 H1". Than it changes the value at Headposition from 0 to 300mm.
This is the status i need to work. Also wehn i press the Z=-25mm button at the interface the Bed moves form the lowest position up 25mm further. So it seems to work just fine.

But if i home again the Z axis the value will be overwritten and i have the same problem again.