Confused by Tormach 1100-3 Original Spindle Setup in Hal (Converting to LCNC)

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# 5i25
# Configuration pin-out:
#
#                    IO Connections for P3
#    Mill Function   Pin#    I/O     Pri. func    Sec. func    Chan      Pin func        Pin Dir
#
#    Spindle Speed    1        0     IOPort       StepGen       4        Step/Table1     (Out)
#    Coolant         14        1     IOPort       None                                   (Out)
#    X Direction      2        2     IOPort       StepGen       0        Dir/Table2      (Out)
#    Estop Reset     15        3     IOPort       None                                   (In)
#    X Step           3        4     IOPort       StepGen       0        Step/Table1     (Out)
#    Spindle Dir     16        5     IOPort       None                                   (Out)
#    Y Direction      4        6     IOPort       StepGen       1        Dir/Table2      (Out)
#    Charge Pump     17        7     IOPort       PWM           0        PWM             (Out)
#    Y Step           5        8     IOPort       StepGen       1        Step/Table1     (Out)
#    Z Direction      6        9     IOPort       StepGen       2        Dir/Table2      (Out)
#    Z Step           7       10     IOPort       StepGen       2        Step/Table1     (Out)
#    A Direction      8       11     IOPort       StepGen       3        Dir/Table2      (Out)
#    A Step           9       12     IOPort       StepGen       3        Step/Table1     (Out)
#    X Limit         10       13     IOPort       None                                   (In)
#    Y Limit         11       14     IOPort       None                                   (In)
#    Z Limit         12       15     IOPort       None                                   (In)
#    Probe In        13       16     IOPort       None                                   (In)
#

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# DPLL configuration
setp hm2_[HOSTMOT2](BOARD).0.dpll.01.timer-us [HOSTMOT2](DPLL_TIMER_US)

# default is -1 which means don't use the DPLL timer and simply sample on read()
# set to 1 for Ethernet boards to use DPLL timer 1 and sample 100 micro seconds
# before the nominal servo thread read() time
setp hm2_[HOSTMOT2](BOARD).0.stepgen.timer-number  [HOSTMOT2](DPLL_TIMER_NUMBER)


# the mills have no encoders enabled in
# [HOSTMOT2] DRIVER_PARAMS="config= num_encoders=0 num_pwmgens=1 num_3pwmgens=0 num_stepgens=5 "
# -- this is a reminder for if they get added
# if there are no encoders the encoder.timer-number pin does not exist and this line will be a fatal srartup error

#setp hm2_[HOSTMOT2](BOARD).0.encoder.timer-number  [HOSTMOT2](DPLL_TIMER_NUMBER)

#
# no-connect for 5i25 - needed by postgui/UI
newsig z-axis-brake-release bit

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# Spindle speed control
#
# stepgen outputs the frequency it is told by tormachspindle comp
#

# type 1 velocity control mode
setp hm2_[HOSTMOT2](BOARD).0.stepgen.04.control-type 1

# step/dir
# type 2 quadrature output for 50% duty cycle
setp hm2_[HOSTMOT2](BOARD).0.stepgen.04.step_type 2

# no scaling 1:1
setp hm2_[HOSTMOT2](BOARD).0.stepgen.04.position-scale 1.0

# handle spindle at speed via separate component
setp hm2_[HOSTMOT2](BOARD).0.stepgen.04.maxaccel 0

# stepspace in nanoseconds
setp hm2_[HOSTMOT2](BOARD).0.stepgen.04.stepspace 0

# steplen in nanoseconds (10 microseconds)
setp hm2_[HOSTMOT2](BOARD).0.stepgen.04.steplen 10000

# assume standard spindle until UI sets it
setp tormachspindle.spindle-type 0

# hispeed spindle min/max
setp tormachspindle.hispeed-min 1000
setp tormachspindle.hispeed-max 24000

# allow UI to access min/max for high speed spindle
# do not net these until the UI code is changed to set them explicitly
# or the setp command above will not stick and they will be set to 0
net spindle-hispeed-min      tormachspindle.hispeed-min
net spindle-hispeed-max      tormachspindle.hispeed-max

# these let the UI read the min/max maintained by the comp based on spindle type
net spindle-min-speed        tormachspindle.min-speed
net spindle-max-speed        tormachspindle.max-speed

# the UI sets the spindle type
net spindle-type             tormachspindle.spindle-type

# assume high range until UI sets it
setp tormachspindle.belt-position 1
net spindle-range            tormachspindle.belt-position
net spindle-range-alarm      tormachspindle.speed-alarm

setp tormachspindle.lowbelt-min-rpm  [SPINDLE]LO_RANGE_MIN
setp tormachspindle.lowbelt-max-rpm  [SPINDLE]LO_RANGE_MAX

setp tormachspindle.highbelt-min-rpm [SPINDLE]HI_RANGE_MIN
setp tormachspindle.highbelt-max-rpm [SPINDLE]HI_RANGE_MAX

# frequencies sent to stepgen to achieve low belt speeds
#   500 Hz ->   6 Hz at VFD ->   175 RPM at spindle (770)
# 10900 Hz -> 120 Hz at VFD ->  3250 RPM at spindle (770)
#   500 Hz ->   6 Hz at VFD ->   100 RPM at spindle (1100-2-3)
# 10900 Hz -> 120 Hz at VFD ->  2000 RPM at spindle (1100-2-3)
#  1600 Hz ->                    300 RPM at spindle (1100-1)
# 10900 Hz ->                   1750 RPM at spindle (1100-1)
setp tormachspindle.lowbelt-min-mcb-freq [SPINDLE]MIN_MCB_FREQUENCY
setp tormachspindle.lowbelt-max-mcb-freq [SPINDLE]MAX_MCB_FREQUENCY

# frequencies sent to stepgen to achieve high belt speeds
#   500 Hz ->   6 Hz at VFD ->   525 RPM at spindle (770)
# 10900 Hz -> 120 Hz at VFD -> 10200 RPM at spindle (770)
#   500 Hz ->   6 Hz at VFD ->   250 RPM at spindle (1100-2-3)
# 10900 Hz -> 120 Hz at VFD ->  5140 RPM at spindle (1100-2-3)
#  1600 Hz ->                    800 RPM at spindle (1100-1)
# 10900 Hz ->                   4500 RPM at spindle (1100-1)
setp tormachspindle.highbelt-min-mcb-freq [SPINDLE]MIN_MCB_FREQUENCY
setp tormachspindle.highbelt-max-mcb-freq [SPINDLE]MAX_MCB_FREQUENCY

# speed-out is displayed by UI when program running
net spindle-speed-fb-rpm     tormachspindle.speed-out

# connect motion speed-out to input of spindle comp
net spindle-speed-raw        motion.spindle-speed-out    tormachspindle.speed-in

# connect output of spindle comp to stepgen
net spindle-speed            tormachspindle.mcb-freq-out hm2_[HOSTMOT2](BOARD).0.stepgen.04.velocity-cmd

# spindle at speed parameters for tormachspindle component
setp tormachspindle.startup-delay     [SPINDLE]STARTUP_DELAY

# time to reach max speed from stopped
setp tormachspindle.seconds-to-max-rpm [SPINDLE]SECONDS_TO_MAX_RPM

# connect spindle comp at-speed output to motion
net spindle-at-speed  tormachspindle.at-speed  motion.spindle-at-speed

# motion.spindle-speed-in is necessary for G95 f/rev
net spindle-rps  tormachspindle.speed-out-rps  motion.spindle-speed-in

# connect motion spindle enable to stepgen enable and spindle comp
net spindle-on        motion.spindle-on        hm2_[HOSTMOT2](BOARD).0.stepgen.04.enable    tormachspindle.spindle-on

# spindle direction
# P3 pin 16 gpio 005
setp hm2_[HOSTMOT2](BOARD).0.gpio.005.is_output 1
net spindle-cw motion.spindle-forward => hm2_[HOSTMOT2](BOARD).0.gpio.005.out

# UI access to stop spindle while in feedhold / INTERP_PAUSED
net spindle-disable tormachspindle.disable

# max RPM when enclosure door open
net enc-door-open-max-rpm tormachspindle.enc-door-open-max-rpm

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