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Hey, since I'm retrofitting my MH400e right now I'm "glad" that this problem was found. I thought about how I will resolve this. Since I want to keep my maho as original as possible, I'm thinking about ether a switch bord between the outputs of the mesa card and the relay board or to just lock it out in the software and to add a new 24v dc power supply. Any thoughts about this?

@RotarySMP could I maybe ask you a few questions about your retrofit?

Thank you for helping, I used the dbraun1981 example hal file to modify mine, but I don't think I quite have it. The example seemed to have 3 axis for part of it and then only define x axis at the end, so I attempted to modify both areas, but I now get the following when I try to start linuxcnc:

phil@SodickA:~/linuxcnc/configs/sim.axis$ linuxcnc lathe.ini
LINUXCNC - 2.9.3
Machine configuration directory is '/home/phil/linuxcnc/configs/sim.axis'
Machine configuration file is 'lathe.ini'
Starting LinuxCNC...
libnml/buffer/shmem.cc 320: Shared memory buffers toolCmd and toolCmd may conflict. (key=1004(0x3EC))
libnml/buffer/shmem.cc 320: Shared memory buffers toolSts and toolSts may conflict. (key=1005(0x3ED))
libnml/buffer/shmem.cc 320: Shared memory buffers emcError and emcError may conflict. (key=1003(0x3EB))
linuxcnc TPMOD=tpmod HOMEMOD=homemod EMCMOT=motmod
Note: Using POSIX realtime
Found file(LIB): /usr/share/linuxcnc/hallib/basic_sim.tcl
setup_kins: cmd=loadrt trivkins coordinates=xz
Found file(REL): ./ethercat.hal
trivkins: already exists
./ethercat.hal:11: waitpid failed /usr/bin/rtapi_app trivkins
./ethercat.hal:11: /usr/bin/rtapi_app exited without becoming ready
./ethercat.hal:11: insmod for trivkins failed, returned -1
Shutting down and cleaning up LinuxCNC...
Note: Using POSIX realtime
LinuxCNC terminated with an error. You can find more information in the log:
/home/phil/linuxcnc_debug.txt
and
/home/phil/linuxcnc_print.txt
as well as in the output of the shell command 'dmesg' and in the terminal


Here is my HAL file:

###########################################################
#
# CIA 402 example snippet Hal
#
###########################################################

###########################################################
# Setup
###########################################################

loadrt [KINS]KINEMATICS
loadrt [EMCMOT]EMCMOT servo_period_nsec=[EMCMOT]SERVO_PERIOD num_joints=[KINS]JOINTS

loadusr -W lcec_conf ethercat-conf.xml
loadrt lcec
loadrt cia402 count=2
loadrt pid names=x-pid,z-pid

###########################################################
# Functions servo-thread
###########################################################

addf lcec.read-all servo-thread
addf cia402.0.read-all servo-thread
addf cia402.1.read-all servo-thread

addf motion-command-handler servo-thread
addf motion-controller servo-thread

addf x-pid.do-pid-calcs servo-thread
addf z-pid.do-pid-calcs servo-thread

addf cia402.0.write-all servo-thread
addf cia402.1.write-all servo-thread
addf lcec.write-all servo-thread

#########################################
#nets
#########################################
net emc-enable => iocontrol.0.emc-enable-in
sets emc-enable 1

#config
setp cia402.0.csp-mode 1
setp cia402.0.pos-scale 3600
setp cia402.1.csp-mode 1
setp cia402.1.pos-scale 3600

#from servo(ethercat) to cia402
net x-statusword lcec.0.0.cia-statusword => cia402.0.statusword
net x-opmode-display lcec.0.0.opmode-display => cia402.0.opmode-display
net x-drv-act-pos lcec.0.0.actual-position => cia402.0.drv-actual-position
net x-drv-act-velo lcec.0.0.actual-velocity => cia402.0.drv-actual-velocity

net z-statusword lcec.1.0.cia-statusword => cia402.1.statusword
net z-opmode-display lcec.1.0.opmode-display => cia402.1.opmode-display
net z-drv-act-pos lcec.1.0.actual-position => cia402.1.drv-actual-position
net z-drv-act-velo lcec.1.0.actual-velocity => cia402.1.drv-actual-velocity

#from cia402 to servo(ethercat)
net x-controlword cia402.0.controlword => lcec.0.0.cia-controlword
net x-modes-of-operation cia402.0.opmode => lcec.0.0.opmode
net x-drv-target-pos cia402.0.drv-target-position => lcec.0.0.target-position
net x-drv-target-velo cia402.0.drv-target-velocity => lcec.0.0.target-velocity

net z-controlword cia402.1.controlword => lcec.1.0.cia-controlword
net z-modes-of-operation cia402.1.opmode => lcec.1.0.opmode
net z-drv-target-pos cia402.1.drv-target-position => lcec.1.0.target-position
net z-drv-target-velo cia402.1.drv-target-velocity => lcec.1.0.target-velocity

#from motion to cia
net x-enable <= joint.0.amp-enable-out => cia402.0.enable
net x-amp-fault => joint.0.amp-fault-in <= cia402.0.drv-fault
net x-pos-cmd <= joint.0.motor-pos-cmd => cia402.0.pos-cmd
net x-pos-fb => joint.0.motor-pos-fb <= cia402.0.pos-fb

net z-enable <= joint.1.amp-enable-out => cia402.1.enable
net z-amp-fault => joint.1.amp-fault-in <= cia402.1.drv-fault
net z-pos-cmd <= joint.1.motor-pos-cmd => cia402.1.pos-cmd
net z-pos-fb => joint.1.motor-pos-fb <= cia402.1.pos-fb

#homing
net x-home-index <= joint.0.index-enable => cia402.0.home
net z-home-index <= joint.1.index-enable => cia402.1.home