Need help to define Z max endstop

Veti

what are you trying to achieve with the z max endstop?

T3P3Tony

@olivier Rather than using a switch, if you just want to lower the bed then send it to that specific position at the end of the print: G1 Zzzz Fnnnn

You don't need a switch because the printer knows where Z is at the end of the print.

Olivier

Hi @T3P3Tony ,
Yes but I would like to add a user macro "down the bed" without homing (for exemple after a power failure).

Maybe it's possible with stall detection ?

T3P3Tony

@olivier It may be possible with stall detection. but if you just want a macro and you have a switch then just write the macro to move and stop when the switch is sensed, wrap the movement in a line to configure that switch as the Z endstop and then configure it back to the probe after the movement has finished.

Olivier

I tryed to do that but without good result,
Could you just write this 2 or 3 lines ? Thank you for your help.

T3P3Tony

@olivier If you determine the Z axis setting to use a switch at Z max (i think you have already done that) then the macro would be something like:

Z_Max_home.g macro in /macros/

M574 Z2 S0
G1 Z300 F<something sensible> H1
M574 <whatever you have in your config.g to setup for the BL touch>

Note i have not tried this so you will need to experiment a bit and have your hand on the power button as things move!

Olivier

@t3p3tony said in Need help to define Z max endstop:

M574 Z2 S0

Bed going down but don't stop when I press the switch. The endstop LED react correctly

Veti

@olivier
add S1 to the G1 command

Olivier

@veti It dont move at all with S1

Veti

@olivier said in Need help to define Z max endstop:

M574 Z2 S0

try changing this to
M574 Z2 S1

Olivier

@veti Same problem...

T3P3Tony

@olivier @veti S1/H1 are interchangable in G1

T3P3Tony

@Olivier what does M119 show when you have the Z switch triggered?

Olivier

@t3p3tony

M119
Endstops - X: not stopped, Y: not stopped, Z: at min stop, Z probe: at min stop

Veti

@olivier
issue the command
M574 Z2 S0

check M119 when the endstop is not triggerd
hold endstop
check M119 again

Olivier

@veti said in Need help to define Z max endstop:

M574 Z2 S0

14:12:13M119
Endstops - X: not stopped, Y: not stopped, Z: not stopped, Z probe: not stopped
14:12:04M119
Endstops - X: not stopped, Y: not stopped, Z: at max stop, Z probe: not stopped
14:11:58M574 Z2 S0

Olivier

My macro :

M574 Z2 S0
G1 Z300 F3000
M574 Z1 S2 ; Set endstops controlled by probe

It was inverted so I put the command M574 Z2 S1 but it not stop anyway...

Veti

@olivier said in Need help to define Z max endstop:

There is no endstop command in your macro and it seems you need to invert the endstop
try

M574 Z2 S1
G1 Z300 F3000 H1
M574 Z1 S2

Olivier

@veti said in Need help to define Z max endstop:

G1 Z300 F3000 H1

You're right !! it work now
Thanks a lot.

I will try the stall detection now

Veti

i still dont understand what you want to achieve with this.