Rambo Z_HOME_DIR change

shmoo · May 2, 2022, 8:49pm

Hello lowrider community,

I am in the process of building a lowrider 2 for plasma cutting.

I just tried to change the Z_HOME_DIR direction from +1 to -1. This results in the following error message in the current Rambo firmware (V1CNC_Rambo_DualLR-2.0.9.2):

In file included from /Users/shmoo/Documents/projekte/plasma-table/V1CNC_Rambo_DualLR-2.0.9.2/Marlin/Marlin/src/inc/MarlinConfigPre.h:37:0,
from /Users/shmoo/Documents/projekte/plasma-table/V1CNC_Rambo_DualLR-2.0.9.2/Marlin/Marlin/src/inc/MarlinConfig.h:28,
from /Users/shmoo/Documents/projekte/plasma-table/V1CNC_Rambo_DualLR-2.0.9.2/Marlin/Marlin/src/MarlinCore.h:24,
from /Users/shmoo/Documents/projekte/plasma-table/V1CNC_Rambo_DualLR-2.0.9.2/Marlin/Marlin/src/MarlinCore.cpp:31:
/Users/shmoo/Documents/projekte/plasma-table/V1CNC_Rambo_DualLR-2.0.9.2/Marlin/Marlin/src/module/endstops.h:77:85: error: ‘Z_MIN’ was not declared in this scope
, Z_ENDSTOP = TERN(Z_HOME_TO_MAX, Z_MAX, TERN(HOMING_Z_WITH_PROBE, Z_MIN_PROBE, Z_MIN))

----- shortened from here for better readability

Does anyone else have the same problem and may have found a solution for it. If I keep +1 the project compiles without problems. I am grateful for any suggestions.

ttraband · May 2, 2022, 9:03pm

When you change the homing direction, you’ll be homing toward the Z_Min switich instead of Z_Max, so you need to have that directive un-commented, and move the physical switch to that connection.

jeffeb3 · May 3, 2022, 12:24am

We made a few changes to make it home up, and probe down. We connect the zprobe to zmin, so we cleared some things for zmin and set the zprobe to that endstop.

This is the script we use to set all of that:

github.com

V1EngineeringInc/MarlinBuilder/blob/main/src/configs/accessories/dual-drivers-on-yz#L17

      
        
            opt_set Z_MIN_ENDSTOP_INVERTING "true"
            opt_set DEFAULT_MAX_FEEDRATE "{ 50, 50, 15 }"
            opt_set DEFAULT_MAX_ACCELERATION "{ 180, 180, 80 }"
            opt_set MANUAL_FEEDRATE "{ 50*60, 50*60, 4*60 }"
            opt_set AXIS_RELATIVE_MODES "{ false, false, false }"
            
            
opt_set Z_HOME_DIR "+1"
            
            
opt_set NUM_Z_STEPPER_DRIVERS "2"
            
            
# Z Min probe configuration.
            opt_set Z_MIN_PROBE_PIN "Z_MIN_PIN"
            opt_disable \
                Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN
            opt_set USER_DESC_4 "\"Probe Z min\""
            opt_set USER_GCODE_4 "\"G38.2 Z0\""
            
            
opt_enable \
                MIN_SOFTWARE_ENDSTOPS \
                MIN_SOFTWARE_ENDSTOP_Z \
                SOFT_ENDSTOPS_MENU_ITEM \

shmoo · May 3, 2022, 4:43pm

I would like to take this opportunity to thank you for helping me so quickly and easily. I have now made it. My naive assumption as a beginner was really that it is enough to simply change the Z_HOME_DIR direction. There is still much for me to learn.