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  • distro88
  • distro88
23 Oct 2025 18:32 - 23 Oct 2025 18:33
torch moving UP when it should be moving DOWN was created by distro88

torch moving UP when it should be moving DOWN

Category: Plasmac

Hello everyone,

I’m having a strange issue with QtPlasmaC (version 2.9.238 / LinuxCNC 2.9.2) and my PROMA THC 150 connected to a Mesa 7i92 card.

Everything on my machine moves correctly — all axes jog fine, torch on/off works, ARC OK is detected correctly, and the THC UP and DOWN inputs show properly in HAL meter.

However, during cutting:

When the THC UP signal is active, the torch moves up 

When the THC DOWN signal is active, the torch moves up instead of down 

Both UP and DOWN signals appear normally in HAL meter as true/false.

Here’s my setup:

Controller: Mesa 7i92 + db25 bib (raw pins)

Plasma: PROMA THC 150

QtPlasmaC version: 2.9.238 (LinuxCNC 2.9.2)

QtPlasmaC Mode: External THC (UP/DOWN/ARC OK)

THC wiring: optocoupled to Mesa inputs

Firmware: 7i92_7i76x1D.

I’ll attach my .hal and .ini files below.

.hal 
# Generated by PNCconf at Wed Oct 22 23:20:44 2025
# Using LinuxCNC version:  Master (2.9)
# If you make changes to this file, they will be
# overwritten when you run PNCconf again

loadrt [KINS]KINEMATICS
loadrt [EMCMOT]EMCMOT servo_period_nsec=[EMCMOT]SERVO_PERIOD num_joints=[KINS]JOINTS num_spindles=[TRAJ]SPINDLES
loadrt hostmot2
loadrt hm2_eth board_ip="10.10.10.10" config="num_encoders=1 num_pwmgens=0 num_stepgens=5 sserial_port_0=00xxxxxx" 
setp    hm2_7i92.0.watchdog.timeout_ns 5000000
loadrt pid names=pid.x,pid.y,pid.y2,pid.z,pid.s
loadrt plasmac

addf hm2_7i92.0.read          servo-thread
addf motion-command-handler   servo-thread
addf motion-controller        servo-thread
addf pid.x.do-pid-calcs       servo-thread
addf pid.y.do-pid-calcs       servo-thread
addf pid.y2.do-pid-calcs       servo-thread
addf pid.z.do-pid-calcs       servo-thread
addf pid.s.do-pid-calcs       servo-thread
addf plasmac                  servo-thread
addf hm2_7i92.0.write         servo-thread
setp hm2_7i92.0.dpll.01.timer-us -50
setp hm2_7i92.0.stepgen.timer-number 1

# ---PLASMA INPUT DEBOUNCE---
#values for these are in custom.hal
loadrt dbounce names=db_breakaway,db_float,db_ohmic,db_arc-ok
addf db_float     servo-thread
addf db_ohmic     servo-thread
addf db_breakaway servo-thread
addf db_arc-ok    servo-thread

# ---JOINT ASSOCIATED WITH THE Z AXIS---
net plasmac:axis-position joint.3.pos-fb => plasmac.axis-z-position

# ---PLASMA INPUTS---
# ---all modes---
net plasmac:float-switch     => db_float.in
net plasmac:breakaway        => db_breakaway.in
net plasmac:ohmic-probe      => db_ohmic.in
net plasmac:ohmic-sense-in   => plasmac.ohmic-sense-in
# ---modes 0 & 1
net plasmac:arc-voltage-in   => plasmac.arc-voltage-in
# ---modes 1 & 2
net plasmac:arc-ok-in        => db_arc-ok.in
# ---mode 2
net plasmac:move-up          <= plasmac.move-up
net plasmac:move-down        <= plasmac.move-down

# ---PLASMA OUTPUTS---
# ---all modes---
net plasmac:ohmic-enable     <= plasmac.ohmic-enable
net plasmac:scribe-arm       <= plasmac.scribe-arm
net plasmac:scribe-on        <= plasmac.scribe-on

# external output signals

# --- PLASMAC:TORCH-ON ---
setp hm2_7i92.0.gpio.030.is_output true
net plasmac:torch-on  =>     hm2_7i92.0.gpio.030.out
setp hm2_7i92.0.gpio.030.invert_output true

# --- PLASMAC:LASER-ON ---
setp hm2_7i92.0.gpio.031.is_output true
net plasmac:laser-on  =>     hm2_7i92.0.gpio.031.out

# --- DOUT-00 ---
setp hm2_7i92.0.gpio.032.is_output true
net dout-00  =>     hm2_7i92.0.gpio.032.out

# --- DOUT-01 ---
setp hm2_7i92.0.gpio.033.is_output true
#qtplasmac uses digital output dout-01:
#net dout-01  =>     hm2_7i92.0.gpio.033.out


# external input signals

# --- MIN-HOME-X ---
net min-home-x     <=  hm2_7i92.0.gpio.018.in

# --- MIN-HOME-Y ---
net min-home-y     <=  hm2_7i92.0.gpio.019.in

# --- MIN-HOME-Y2 ---
net min-home-y2     <=  hm2_7i92.0.gpio.020.in

# --- MAX-HOME-Z ---
net max-home-z     <=  hm2_7i92.0.gpio.021.in

# --- PLASMAC:FLOAT-SWITCH ---
net plasmac:float-switch     <=  hm2_7i92.0.gpio.022.in

# --- PLASMAC:BREAKAWAY ---
net plasmac:breakaway     <=  hm2_7i92.0.gpio.023.in

# --- PLASMAC:ARC-OK-IN ---
net plasmac:arc-ok-in     <=  hm2_7i92.0.gpio.024.in

# --- PLASMAC:MOVE-UP ---
net plasmac:move-up     <=  hm2_7i92.0.gpio.025.in

# --- PLASMAC:MOVE-DOWN ---
net plasmac:move-down     <=  hm2_7i92.0.gpio.026.in

# --- ESTOP-EXT ---
net estop-ext     <=  hm2_7i92.0.gpio.027.in_not


#*******************
#  AXIS X JOINT 0
#*******************

setp   pid.x.Pgain     [JOINT_0]P
setp   pid.x.Igain     [JOINT_0]I
setp   pid.x.Dgain     [JOINT_0]D
setp   pid.x.bias      [JOINT_0]BIAS
setp   pid.x.FF0       [JOINT_0]FF0
setp   pid.x.FF1       [JOINT_0]FF1
setp   pid.x.FF2       [JOINT_0]FF2
setp   pid.x.deadband  [JOINT_0]DEADBAND
setp   pid.x.maxoutput [JOINT_0]MAX_OUTPUT
setp   pid.x.error-previous-target true
# This setting is to limit bogus stepgen
# velocity corrections caused by position
# feedback sample time jitter.
setp   pid.x.maxerror 0.012700

net x-index-enable  =>  pid.x.index-enable
net x-enable        =>  pid.x.enable
net x-pos-cmd       =>  pid.x.command
net x-pos-fb        =>  pid.x.feedback
net x-output        <=  pid.x.output

# Step Gen signals/setup

setp   hm2_7i92.0.stepgen.00.dirsetup        [JOINT_0]DIRSETUP
setp   hm2_7i92.0.stepgen.00.dirhold         [JOINT_0]DIRHOLD
setp   hm2_7i92.0.stepgen.00.steplen         [JOINT_0]STEPLEN
setp   hm2_7i92.0.stepgen.00.stepspace       [JOINT_0]STEPSPACE
setp   hm2_7i92.0.stepgen.00.position-scale  [JOINT_0]STEP_SCALE
setp   hm2_7i92.0.stepgen.00.step_type        0
setp   hm2_7i92.0.stepgen.00.control-type     1
setp   hm2_7i92.0.stepgen.00.maxaccel         [JOINT_0]STEPGEN_MAXACCEL
setp   hm2_7i92.0.stepgen.00.maxvel           [JOINT_0]STEPGEN_MAXVEL

# ---closedloop stepper signals---

net x-pos-cmd    <= joint.0.motor-pos-cmd
net x-vel-cmd    <= joint.0.vel-cmd
net x-output     => hm2_7i92.0.stepgen.00.velocity-cmd
net x-pos-fb     <= hm2_7i92.0.stepgen.00.position-fb
net x-pos-fb     => joint.0.motor-pos-fb
net x-enable     <= joint.0.amp-enable-out
net x-enable     => hm2_7i92.0.stepgen.00.enable

# ---setup home / limit switch signals---

net min-home-x     =>  joint.0.home-sw-in
net min-home-x     =>  joint.0.neg-lim-sw-in
net x-pos-limit     =>  joint.0.pos-lim-sw-in

#*******************
#  AXIS Y JOINT 1
#*******************

setp   pid.y.Pgain     [JOINT_1]P
setp   pid.y.Igain     [JOINT_1]I
setp   pid.y.Dgain     [JOINT_1]D
setp   pid.y.bias      [JOINT_1]BIAS
setp   pid.y.FF0       [JOINT_1]FF0
setp   pid.y.FF1       [JOINT_1]FF1
setp   pid.y.FF2       [JOINT_1]FF2
setp   pid.y.deadband  [JOINT_1]DEADBAND
setp   pid.y.maxoutput [JOINT_1]MAX_OUTPUT
setp   pid.y.error-previous-target true
# This setting is to limit bogus stepgen
# velocity corrections caused by position
# feedback sample time jitter.
setp   pid.y.maxerror 0.012700

net y-index-enable  =>  pid.y.index-enable
net y-enable        =>  pid.y.enable
net y-pos-cmd       =>  pid.y.command
net y-pos-fb        =>  pid.y.feedback
net y-output        <=  pid.y.output

# Step Gen signals/setup

setp   hm2_7i92.0.stepgen.01.dirsetup        [JOINT_1]DIRSETUP
setp   hm2_7i92.0.stepgen.01.dirhold         [JOINT_1]DIRHOLD
setp   hm2_7i92.0.stepgen.01.steplen         [JOINT_1]STEPLEN
setp   hm2_7i92.0.stepgen.01.stepspace       [JOINT_1]STEPSPACE
setp   hm2_7i92.0.stepgen.01.position-scale  [JOINT_1]STEP_SCALE
setp   hm2_7i92.0.stepgen.01.step_type        0
setp   hm2_7i92.0.stepgen.01.control-type     1
setp   hm2_7i92.0.stepgen.01.maxaccel         [JOINT_1]STEPGEN_MAXACCEL
setp   hm2_7i92.0.stepgen.01.maxvel           [JOINT_1]STEPGEN_MAXVEL

# ---closedloop stepper signals---

net y-pos-cmd    <= joint.1.motor-pos-cmd
net y-vel-cmd    <= joint.1.vel-cmd
net y-output     => hm2_7i92.0.stepgen.01.velocity-cmd
net y-pos-fb     <= hm2_7i92.0.stepgen.01.position-fb
net y-pos-fb     => joint.1.motor-pos-fb
net y-enable     <= joint.1.amp-enable-out
net y-enable     => hm2_7i92.0.stepgen.01.enable

# ---setup home / limit switch signals---

net min-home-y     =>  joint.1.home-sw-in
net min-home-y     =>  joint.1.neg-lim-sw-in
net y-pos-limit     =>  joint.1.pos-lim-sw-in

#*******************
#  Tandem AXIS Y2 JOINT 2
#*******************

setp   pid.y2.Pgain     [JOINT_2]P
setp   pid.y2.Igain     [JOINT_2]I
setp   pid.y2.Dgain     [JOINT_2]D
setp   pid.y2.bias      [JOINT_2]BIAS
setp   pid.y2.FF0       [JOINT_2]FF0
setp   pid.y2.FF1       [JOINT_2]FF1
setp   pid.y2.FF2       [JOINT_2]FF2
setp   pid.y2.deadband  [JOINT_2]DEADBAND
setp   pid.y2.maxoutput [JOINT_2]MAX_OUTPUT
setp   pid.y2.error-previous-target true
# This setting is to limit bogus stepgen
# velocity corrections caused by position
# feedback sample time jitter.
setp   pid.y2.maxerror 0.012700

net y2-index-enable  =>  pid.y2.index-enable
net y2-enable        =>  pid.y2.enable
net y2-pos-cmd       =>  pid.y2.command
net y2-pos-fb        =>  pid.y2.feedback
net y2-output        <=  pid.y2.output

# Step Gen signals/setup for tandem axis

setp   hm2_7i92.0.stepgen.04.dirsetup        [JOINT_2]DIRSETUP
setp   hm2_7i92.0.stepgen.04.dirhold         [JOINT_2]DIRHOLD
setp   hm2_7i92.0.stepgen.04.steplen         [JOINT_2]STEPLEN
setp   hm2_7i92.0.stepgen.04.stepspace       [JOINT_2]STEPSPACE
setp   hm2_7i92.0.stepgen.04.position-scale  [JOINT_2]STEP_SCALE
setp   hm2_7i92.0.stepgen.04.step_type        0
setp   hm2_7i92.0.stepgen.04.control-type     1
setp   hm2_7i92.0.stepgen.04.maxaccel         [JOINT_2]STEPGEN_MAXACCEL
setp   hm2_7i92.0.stepgen.04.maxvel           [JOINT_2]STEPGEN_MAXVEL

# ---closedloop stepper signals---

net y2-pos-cmd    <= joint.2.motor-pos-cmd
net y2-vel-cmd    <= joint.2.vel-cmd
net y2-output     => hm2_7i92.0.stepgen.04.velocity-cmd
net y2-pos-fb     <= hm2_7i92.0.stepgen.04.position-fb
net y2-pos-fb     => joint.2.motor-pos-fb
net y2-enable     <= joint.2.amp-enable-out
net y2-enable     => hm2_7i92.0.stepgen.04.enable

# ---setup home / limit switch signals---

net min-home-y2     =>  joint.2.home-sw-in
net min-home-y2     =>  joint.2.neg-lim-sw-in
net y2-pos-limit     =>  joint.2.pos-lim-sw-in

#*******************
#  AXIS Z JOINT 3
#*******************

setp   pid.z.Pgain     [JOINT_3]P
setp   pid.z.Igain     [JOINT_3]I
setp   pid.z.Dgain     [JOINT_3]D
setp   pid.z.bias      [JOINT_3]BIAS
setp   pid.z.FF0       [JOINT_3]FF0
setp   pid.z.FF1       [JOINT_3]FF1
setp   pid.z.FF2       [JOINT_3]FF2
setp   pid.z.deadband  [JOINT_3]DEADBAND
setp   pid.z.maxoutput [JOINT_3]MAX_OUTPUT
setp   pid.z.error-previous-target true
# This setting is to limit bogus stepgen
# velocity corrections caused by position
# feedback sample time jitter.
setp   pid.z.maxerror 0.012700

net z-index-enable  =>  pid.z.index-enable
net z-enable        =>  pid.z.enable
net z-pos-cmd       =>  pid.z.command
net z-pos-fb        =>  pid.z.feedback
net z-output        <=  pid.z.output

# Step Gen signals/setup

setp   hm2_7i92.0.stepgen.03.dirsetup        [JOINT_3]DIRSETUP
setp   hm2_7i92.0.stepgen.03.dirhold         [JOINT_3]DIRHOLD
setp   hm2_7i92.0.stepgen.03.steplen         [JOINT_3]STEPLEN
setp   hm2_7i92.0.stepgen.03.stepspace       [JOINT_3]STEPSPACE
setp   hm2_7i92.0.stepgen.03.position-scale  [JOINT_3]STEP_SCALE
setp   hm2_7i92.0.stepgen.03.step_type        0
setp   hm2_7i92.0.stepgen.03.control-type     1
setp   hm2_7i92.0.stepgen.03.maxaccel         [JOINT_3]STEPGEN_MAXACCEL
setp   hm2_7i92.0.stepgen.03.maxvel           [JOINT_3]STEPGEN_MAXVEL

# ---closedloop stepper signals---

net z-pos-cmd    <= joint.3.motor-pos-cmd
net z-vel-cmd    <= joint.3.vel-cmd
net z-output     => hm2_7i92.0.stepgen.03.velocity-cmd
net z-pos-fb     <= hm2_7i92.0.stepgen.03.position-fb
net z-pos-fb     => joint.3.motor-pos-fb
net z-enable     <= joint.3.amp-enable-out
net z-enable     => hm2_7i92.0.stepgen.03.enable

# ---setup home / limit switch signals---

net max-home-z     =>  joint.3.home-sw-in
net z-neg-limit     =>  joint.3.neg-lim-sw-in
net max-home-z     =>  joint.3.pos-lim-sw-in

#  ---motion control signals---

net in-position               <=  motion.in-position
net machine-is-enabled        <=  motion.motion-enabled

#  ---digital in / out signals---

net dout-00     <=  motion.digital-out-00
#qtplasmac uses digital output dout-01:
#net dout-01     <=  motion.digital-out-01
#  ---estop signals---

net estop-out     <=  iocontrol.0.user-enable-out
net estop-ext     =>  iocontrol.0.emc-enable-in


# ---QTPLASMAC TOOLCHANGE PASSTHROUGH---
net tool:change iocontrol.0.tool-change  => iocontrol.0.tool-changed
net tool:prep   iocontrol.0.tool-prepare => iocontrol.0.tool-prepared



.ini 
[code]# Generated by PNCconf at Wed Oct 22 23:20:44 2025
# Using LinuxCNC version:  Master (2.9)
# If you make changes to this file, they will be
# overwritten when you run PNCconf again

[EMC]
MACHINE = test-2
DEBUG = 0
VERSION = 1.1

[DISPLAY]
DISPLAY = qtvcp qtplasmac
POSITION_OFFSET = RELATIVE
POSITION_FEEDBACK = ACTUAL
MAX_FEED_OVERRIDE = 2.000000
INTRO_GRAPHIC = linuxcnc.gif
INTRO_TIME = 5
PROGRAM_PREFIX = /home/x/linuxcnc/nc_files
INCREMENTS = 10mm 1mm .1mm .01mm .001mm
POSITION_FEEDBACK = ACTUAL
DEFAULT_LINEAR_VELOCITY = 6.000000
MAX_LINEAR_VELOCITY = 25.000000
MIN_LINEAR_VELOCITY = 0.500000
DEFAULT_ANGULAR_VELOCITY = 12.000000
MAX_ANGULAR_VELOCITY = 180.000000
MIN_ANGULAR_VELOCITY = 1.666667
GEOMETRY = xyz
CYCLE_TIME = 100

[FILTER]
PROGRAM_EXTENSION = .ngc,.nc,.tap GCode File (*.ngc, *.nc, *.tap)
ngc = qtplasmac_gcode
nc  = qtplasmac_gcode
tap = qtplasmac_gcode

[TASK]
TASK = milltask
CYCLE_TIME = 0.010

[RS274NGC]
PARAMETER_FILE = linuxcnc.var
RS274NGC_STARTUP_CODE = G21 G40 G49 G80 G90 G92.1 G94 G97 M52P1
SUBROUTINE_PATH = ./:../../nc_files
USER_M_PATH = ./:../../nc_files


[EMCMOT]
EMCMOT = motmod
COMM_TIMEOUT = 1.0
SERVO_PERIOD = 1000000

[HMOT]
# **** This is for info only ****
CARD0=hm2_7i92.0

[HAL]
HALUI = halui
HALFILE = test-2.hal
HALFILE = qtplasmac_comp.hal
HALFILE = custom.hal
POSTGUI_HALFILE = custom_postgui.hal
SHUTDOWN = shutdown.hal

[HALUI]

[KINS]
JOINTS = 4
KINEMATICS = trivkins coordinates=XYYZ

[TRAJ]
SPINDLES = 3
COORDINATES =  XYYZ
LINEAR_UNITS = mm
ANGULAR_UNITS = degree
DEFAULT_LINEAR_VELOCITY = 2.50
MAX_LINEAR_VELOCITY = 25.00

[EMCIO]
EMCIO = io
CYCLE_TIME = 0.100
TOOL_TABLE = tool.tbl

#******************************************
[AXIS_X]
# MAX_VEL & MAX_ACC need to be twice the corresponding joint value
MAX_VELOCITY = 50.0
MAX_ACCELERATION = 1500.0
OFFSET_AV_RATIO = 0.5
MIN_LIMIT = -0.01
MAX_LIMIT = 2000.0

[JOINT_0]
TYPE = LINEAR
HOME = 0.0
FERROR = 10.0
MIN_FERROR = 1.0
MAX_VELOCITY = 25.0
MAX_ACCELERATION = 750.0
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
# If using BACKLASH compensation STEPGEN_MAXACCEL should be 100% larger.
STEPGEN_MAXVEL = 31.25
STEPGEN_MAXACCEL = 937.50
P = 1000.0
I = 0.0
D = 0.0
FF0 = 0.0
FF1 = 1.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 0.0
# these are in nanoseconds
DIRSETUP   = 10000
DIRHOLD    = 10000
STEPLEN    = 5000
STEPSPACE  = 5000
STEP_SCALE = 100.0
MIN_LIMIT = -0.01
MAX_LIMIT = 2000.0
HOME_OFFSET = 0.000000
HOME_SEARCH_VEL = -1.000000
HOME_LATCH_VEL = 0.500000
HOME_FINAL_VEL = 0.000000
HOME_USE_INDEX = NO
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 2
#******************************************

#******************************************
[AXIS_Y]
# MAX_VEL & MAX_ACC need to be twice the corresponding joint value
MAX_VELOCITY = 50.0
MAX_ACCELERATION = 1500.0
OFFSET_AV_RATIO = 0.5
MIN_LIMIT = -0.01
MAX_LIMIT = 3000.0

[JOINT_1]
TYPE = LINEAR
HOME = 0.0
FERROR = 10.0
MIN_FERROR = 1.0
MAX_VELOCITY = 25.0
MAX_ACCELERATION = 750.0
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
# If using BACKLASH compensation STEPGEN_MAXACCEL should be 100% larger.
STEPGEN_MAXVEL = 31.25
STEPGEN_MAXACCEL = 937.50
P = 1000.0
I = 0.0
D = 0.0
FF0 = 0.0
FF1 = 1.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 0.0
# these are in nanoseconds
DIRSETUP   = 10000
DIRHOLD    = 10000
STEPLEN    = 5000
STEPSPACE  = 5000
STEP_SCALE = 100.0
MIN_LIMIT = -0.01
MAX_LIMIT = 3000.0
HOME_OFFSET = 0.000000
HOME_SEARCH_VEL = -1.000000
HOME_LATCH_VEL = 0.500000
HOME_FINAL_VEL = 0.000000
HOME_USE_INDEX = NO
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = -3

[JOINT_2]
TYPE = LINEAR
HOME = 0.0
FERROR = 10.0
MIN_FERROR = 1.0
MAX_VELOCITY = 25.0
MAX_ACCELERATION = 750.0
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
# If using BACKLASH compensation STEPGEN_MAXACCEL should be 100% larger.
STEPGEN_MAXVEL = 31.25
STEPGEN_MAXACCEL = 937.50
P = 1000.0
I = 0.0
D = 0.0
FF0 = 0.0
FF1 = 1.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 0.0
# these are in nanoseconds
DIRSETUP   = 10000
DIRHOLD    = 10000
STEPLEN    = 5000
STEPSPACE  = 5000
STEP_SCALE = 100.0
MIN_LIMIT = -0.01
MAX_LIMIT = 3000.0
HOME_OFFSET = 0.000000
HOME_SEARCH_VEL = -1.000000
HOME_LATCH_VEL = 0.500000
HOME_FINAL_VEL = 0.000000
HOME_USE_INDEX = NO
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = -3
#******************************************

#******************************************
[AXIS_Z]
# MAX_VEL & MAX_ACC need to be twice the corresponding joint value
MAX_VELOCITY = 50.0
MAX_ACCELERATION = 1500.0
OFFSET_AV_RATIO = 0.5
MIN_LIMIT = -200.0
MAX_LIMIT = 0.01

[JOINT_3]
TYPE = LINEAR
HOME = 0.0
FERROR = 10.0
MIN_FERROR = 1.0
MAX_VELOCITY = 25.0
MAX_ACCELERATION = 750.0
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
# If using BACKLASH compensation STEPGEN_MAXACCEL should be 100% larger.
STEPGEN_MAXVEL = 31.25
STEPGEN_MAXACCEL = 937.50
P = 1000.0
I = 0.0
D = 0.0
FF0 = 0.0
FF1 = 1.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 0.0
# these are in nanoseconds
DIRSETUP   = 10000
DIRHOLD    = 10000
STEPLEN    = 5000
STEPSPACE  = 5000
STEP_SCALE = 100.0
MIN_LIMIT = -200.0
MAX_LIMIT = 0.01
HOME_OFFSET = 0.000000
HOME_SEARCH_VEL = -1.000000
HOME_LATCH_VEL = 0.500000
HOME_FINAL_VEL = 0.000000
HOME_USE_INDEX = NO
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 1
#******************************************



Any help or working HAL example with PROMA 150 + Mesa hardware would be greatly appreciated!

Thank you in advance 
[/code]
  • sconisbee
  • sconisbee
19 Oct 2025 20:13
Replied by sconisbee on topic Remora - ethernet NVEM / EC300 / EC500 cnc board

Remora - ethernet NVEM / EC300 / EC500 cnc board

Category: Computers and Hardware

Good Evening,

I'm relatively new to LinuxCNC having come from Mach 3 on mills previously.  Having found mach3 limited for lathes I have moved over to LinuxCNC.  I have been/have converted an old Boxford 240 TCL to run on new steppers, and LinuxCNC running on a Pi5 connected to an ec300 running the remora firmware.

Everything in general is working fine, except the spindle encoder.  Annoyingly, it is not a quadrature encoder.  It is a 100ppr slotted disk with an additional index pulse.  Currently, this is feeding directly into the Pi5, which is reading the 100ppr but missing the index.

So, my plan is to move the encoder and index over to the ec300.  While i understand that the ec300 has a dedicated index input, I am unsure on using an encoder with remora.  I've read the docs, and have run through this thread but my head is spinning trying to get things straight. 

Does the EC300 have the ability for a hardware encoder?  if not, software would work too, I'm just not sure how to set up the encoder component as I do not have a B phase.

On the hardware side, I'm going to have to work out some electronics as the encoder as it stands is running on 3.3v with schmitt triggers for conditioning.  So I will have to come up with something to level shift this to 24v.

Any help that could be given on the remora side of things would be greatly appreciated.
 
  • jpg
  • jpg
19 Oct 2025 15:12
Replied by jpg on topic M19 for Indexing a Spindle using Stepper Motors

M19 for Indexing a Spindle using Stepper Motors

Category: General LinuxCNC Questions

Hello, here is a functional version for port // that may help.
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