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setp stepgen.4.position-scale [JOINT_4]SCALE
setp stepgen.4.steplen 1
setp stepgen.4.stepspace 0
setp stepgen.4.dirhold 40000
setp stepgen.4.dirsetup 40000
setp stepgen.4.maxaccel [JOINT_3]STEPGEN_MAXACCEL
net zpos-cmd joint.4.motor-pos-cmd => stepgen.4.position-cmd
net zpos-fb stepgen.4.position-fb => joint.4.motor-pos-fb
net zstep <= stepgen.4.step
net zdir <= stepgen.4.dir
net zenable joint.3.amp-enable-out => stepgen.4.enable
net estop-out <= iocontrol.0.user-enable-out
net estop-out => iocontrol.0.emc-enable-in

The red text probably should be:
setp stepgen.4.maxaccel [JOINT_4]STEPGEN_MAXACCEL
net apos-cmd joint.4.motor-pos-cmd => stepgen.4.position-cmd
net apos-fb stepgen.4.position-fb => joint.4.motor-pos-fb
net astep <= stepgen.4.step
net adir <= stepgen.4.dir
net aenable joint.4.amp-enable-out => stepgen.4.enable

Note that you also need to connect the astep and adir signals to the appropriate
parallel port pins similar to this (z highlighted ):

setp parport.0.pin-01-out-invert 1
net estop-out => parport.0.pin-01-out
net xstep => parport.0.pin-02-out
setp parport.0.pin-02-out-reset 1
net xdir => parport.0.pin-03-out
net y0step => parport.0.pin-04-out
setp parport.0.pin-04-out-reset 1
net y0dir => parport.0.pin-05-out
net zstep => parport.0.pin-06-out
setp parport.0.pin-06-out-reset 1
net zdir => parport.0.pin-07-out
net y1step => parport.0.pin-08-out
setp parport.0.pin-08-out-reset 1
net y1dir => parport.0.pin-09-out
net spindle-cw => parport.0.pin-14-out
net spindle-pwm => parport.0.pin-16-out
net xenable => parport.0.pin-17-out
 

Good evening.  I am not sure if this is the right area to ask this question, but here goes.  I am converting a Novaturn lathe that has a Sprint 1200 (400) DC motor controller and I am using a Mesa 7i76U to handle the connections.  I have the steppers moving properly, the e stop and limits working properly but am very apprehensive about connecting to the Sprint 1200 because I dont want to damage anything.  Anyway, after days of reading, testing, and more reading I am finally reaching out for help.  Does anyone know the correct wiring to connect the 7i76 (TB4) spindle connectors to the appropriate Sprint connectors?  I need to be able to turn the motor on, adjust speed, etc.  The motor does not reverse.  The contacts on the Sprint are (1) +10, (2) MIN, (3) I/P, 4 COM, (5) RUN, (6) TACH, (7) COM.  Any guidance would be appreciated.