Index pulse in Lathe

[RICH]

You can make a tapered thread by specifying the taper in the wizard. I would need to  find my notes on doing it. The taper
input is "twice the angle" ,I think .......  just dont remember. The "T*********xx" in G76 defines the taper.  Been a long time since I  did one.

RICH

[Renatox_]

Then this is possible make threading conical.

Other restlessness when mach3 turn think implement timing pulse, namely several pulses por revolution of spindle?, i see several turn cnc and all use encoder in spindle.
This must be at least a few slots per revolution for more precision long threads. because several factors can alter the velocity of spindle in one revolution and the mach no informed of this.

thanks
Renato

[Hood]

When using the parallel port Mach just uses a single index when threading and it works well. There used to be an option for multiple slot discs but there was no real benefit to using them.
Hood