can linux cnc can cut a thread using only breakout board without using mesa card

Phase A for threading
Phase B = Index pulse?
Am I correct?

No, Index is a once per turn signal

A,B are the names of quadrature signals used for counting bidirectionally

You can have a system with just one signal, where you combine A and index
This only works for threading and doesn't do well unless you have good speed control
You need A,B and index if you want to do rigid tapping.

7xcnc.com/hardware/encoder/

there are too many codes how to add them to linux cnc?

Where is index pulse in this code.
I couldn't find it please explain this.

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I going to use NJK-5002C-Hall-Effect-Sensor-Proximity-Switch as index pulse and
IR-Infrared-Slotted-Optical-Speed-Test-Sensor as Phase A
is it GOOD or

using two IR-Infrared-Slotted-Optical-Speed-Test-Sensors as Phase A and index pulse,

please give me a better codes for this setup.
Thank you

DinukaShehan wrote: Where is index pulse in this code.
I couldn't find it please explain this.

it is here

# connect the HAL encoder inputs to the real encoder.
net spindle-phase-a encoder.0.phase-A <= parport.0.pin-13-in
net spindle-phase-b encoder.0.phase-B
net spindle-index encoder.0.phase-Z <= parport.0.pin-12-in

where it connects to the PP

Is this full code?
please give me is not the full code?

if you upload your HAL and INI File we can take a look and correct you if you are wrong

the Full code depends on more as of treading

the spindle needs to be correct initalisised at RPM
so your VFD does have -V or maybe modebus to transfer all the needed signals

Hi,
Can’t I perform threading without vfd?
Vfd is not currently unavailable.
Any ideas?

DinukaShehan wrote: Hi,
Can’t I perform threading without vfd?
Vfd is not currently unavailable.
Any ideas?

You don't need a vfd but you do need to know the spindle speed and then use that speed in the gcode also the in the hal file it need a spindle near statement so the speed does not have to be exact within a few revs.

I think you have the code for the PP for threading .

hear is an example of the gcode for a 10mm thread:-

G0 G40 G18 G80 G21 G49 G95
G90 G7

F1.5 S470 (this is the spindle speed)

M3
G4 P1
M7
(Change the fist X to the Dia P = the Pitch K = Thread depth)

G0 X10 Z10
G76 P1.5 Z-12 I-0.1 J0.1 R1 K1.5 Q29.5 L0 H1

g0 X30
g0 Z50

M9
M5

M2
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