Z motor Tries To Pass Endstop

AlexTheGreat

I'm having an issue where when I'm trying to home the axis the Z-axis hits the end stop and keeps going. I don't know if this is because I have a BLTouch installed as well and have no calibrated it yet (which it won't let me do until I home all axis). Any help would be appreciated.

fcwilt

@AlexTheGreat

Do you have the end stop switch configured to be the end stop for the Z axis AND is it on the correct end?

Some folks use their Z-probe as a "end stop switch", so to speak, and home using that.

I have a BLTouch Z-probe but I saw no reason to remove my existing Z axis end stop switch and I continue to use it for Z axis homing.

The BLTouch in this case is only used for probing.

It all works fine.

Frederick

AlexTheGreat

This post is deleted!

AlexTheGreat

@fcwilt How can I check to make sure I have the switch set as the end stop? Sorry for the bother, I'm new to all this!

fcwilt

@AlexTheGreat said in Z motor Tries To Pass Endstop:

@fcwilt How can I check to make sure I have the switch set as the end stop? Sorry for the bother, I'm new to all this!

Check your config file for a M574 command with a Z0 or Z1 or Z2 parameter.

The Z parameter specifies the location of the "endstop switch":

Z0 means there is not Z endstop switch
Z1 means the Z endstop switch is at the "low" end of the axis (near the axis minimum)
Z2 means the Z endstop switch is at the "high" end of the axis (near the axis maximum)

There should also be a S parameter which specifies the type of endstop device:

S0 means the endstop input will respond to an active low condition
S1 means the endstop input will respond to an active high condition
S2 means the Z-probe is to be used for "endstop" detection.
S3 means stepper motor load detection is to be used for "endstop" detection.

Frederick

Phaedrux

There is quite a bit of documentation that may help you along.

https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe
https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_BLTouch
https://duet3d.dozuki.com/Wiki/ConfiguringRepRapFirmwareCartesianPrinter#Section_Homing_files

Please post your config.g and homing files.