Linuxcnc lathe threading problem

Sir,

I am converted mach3 lathe to linuxcnc lathe and also change spindle rpm sensor disc (16 slot) and this linuxcnc lathe not make threading  correctly and the thread has been always damaged and I am also attached files please see files and tell how to  solve this problem.

Many thanks, 
Rohit Gupta 

if you want to run LCNC reliably, do not use a parallel port and buy a mesa card. 7i96 or 7i76e for example. However, if you want to find an error on the parallel port at all costs, you need to find out if the steps on the encoder or on the Z axis are lost or both.

Make an empty thread a few times and then measure whether the spindle and axes return to the home position.

rohit269 wrote:

I am converted mach3 lathe to linuxcnc lathe and also change spindle rpm sensor disc (16 slot) and this linuxcnc lathe not make threading  correctly 

I don't see any evidence of an index, you seem to have only one sensor and 16 slots. So the system does not know when to start the threading pass. 

You need a once-per-rev index as well as the 16 pulses. (Or, in the development version, there is an option to use missing-tooth index) 


 

Many thanks for supporting me,

Sir I am already connected spindle sensor single output into two pin 11 and 12 for index and Spindle phase A but thread always damaged.

i used omron quadrature encoder.
It have A,B & Z phases.
Easy to connect.

rohit269 wrote:

Sir I am already connected spindle sensor single output into two pin 11 and 12 for index and Spindle phase A but thread always damaged.

The index must be once-per-revolution. My impression is that you have 16 indexes per revolution?