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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

Sorry for the double post. I already found several examples of carousel and tool changers that circumvent this HAL (Probe Basic also seems to use its own implementation in the var file). Is it save to assume that this function just doesnt work?

If so, I will just follow the PB implementation and add/modify the pockets in my var file and (try) to use these.

Okay, I found the issue why the PB remapping was not used. The python had to be activated in the ini as follows.