G76 spindle settings

I've added a second sensor to my spindle.  Both at LPT1 (Secondary port)
Sensor 1 is at Pin 10
Sensor 2 is at Pin 11
The system shows that each of the signals are correct at  LPT Pin 10 & Pin11 when I rotate the spindle by hand.
G95 & CSS work fine.

But when using G76:
Spindle rotates and tool moves to position, then on command of G76, the machine sits and waits.
I must  have missed out something in my .Hal, but I can't see the wod for the trees.
Please see below if someone may be able to tell me where I've gone wrong?

loadrt encoder num_chan=4
addf encoder.update-counters base-thread
addf encoder.capture-position servo-thread

# set the HAL encoder to 100 pulses per revolution.
setp encoder.3.position-scale 100

#set the HAL encoder count mode
setp encoder.3.counter-mode true

# connect the HAL encoder outputs to LinuxCNC.
net spindle-position encoder.3.position => spindle.0.revs
net spindle-velocity encoder.3.velocity => spindle.0.speed-in
net spindle-index-enable encoder.3.index-enable <=> spindle.0.index-enable

#Connect HAL Encoder to Parallel Port
net spindle-phase-a encoder.3.phase-A <= parport.1.pin-10-in
net spindle-phase-b encoder.3.phase-B
net spindle-index encoder.3.phase-Z <= parport.1.pin-11-in

#SPINDLE AT SPEED DETAIL
# load a near component and attach it to a thread
loadrt near
addf near.0 servo-thread

# connect one input to the commanded spindle speed
net spindle-cmd-rps-abs => near.0.in1

# connect one input to the encoder-measured spindle speed
net spindle-velocity => near.0.in2

# set the spindle speed inputs to agree if within 1%
setp near.0.scale 1.333

# connect the output to the spindle-at-speed input
net spindle-at-speed spindle.0.at-speed <= near.0.out
 

OK what is the gcode you are using to achieve this

?
Do you mean the complete program I'm using ?

Using Halshow I can see the signal at 'spindle index' but nothing at 'spindle index enable'
I've had a good look through the document, but I'm struggling to see what it is I need to be focusing on.

I swapped M4 in the program for M3, and it now works.
I need it to work in M3 not M4 as the turret is designed only to work with left hand tools.
I'm guessing something is counting negative due to the rotation thus not triggering the spindle-at speed perhaps?

I'm back to this old problem again.
As previously stated, G76 works fine with M3 but not with M4.
I actually solved this problem but didn't take down any notes and moved on to something else more urgent. Now I'm back here again frustrated with my self for repeating the problem.

Can anyone help? Something tells me it's something to do with counting negative??

Has anyone got any suggestions as to why it doesn't work with M4 ?

Can anyone shed any light on this problem.
I'm stuck here and could really do with a little help?
Any suggestion is welcome,please ...

Hi

I have same problem, M3 and G76 work but with M4 command it won't work. Is there solution or suggestions for this?