Rigid Tapping Help

Fortunately I've taken plenty of pictures of the boards and wiring so I can answer this from work!

The index wires are connected as:
Out Z+ to pin 23 (IDX5)
Out Z- to pin 24 (/IDX5)

This is to "Encoder 5" on the 7i77

Can you try this: (from a command line when LinuxCNC is running)

halmeter signal spindle-index-enable
halcmd sets spindle-index-enable 1

and hand rotate the spindle a full turn, if spindle-index-enable never gets cleared, the hardware is not seeing the index pulse and the signals need to be checked.

A quick way to check differential signals is to measure across the pairs with a voltmeter (that is to check IDX5, measure between TB4 pins 23,24 (IDX5, /IDX5) in both states of index

PCW wrote: Can you try this: (from a command line when LinuxCNC is running)

halmeter signal spindle-index-enable
halcmd sets spindle-index-enable 1

and hand rotate the spindle a full turn, if spindle-index-enable never gets cleared, the hardware is not seeing the index pulse and the signals need to be checked.

A quick way to check differential signals is to measure across the pairs with a voltmeter (that is to check IDX5, measure between TB4 pins 23,24 (IDX5, /IDX5) in both states of index

I'll give this a shot tomorrow, but....

I'm a linux moron - is that a command line within linuxCNC or just a linux command line?


What am I looking for when measuring pins 23/24? A change in voltage when index hits?

1. Just a linux command line

2. There should be from 2 to 5 V across pins 23 and 24 and the polarity should reverse when index is hit (that is, if you measured +3V across the pins when off index, you should read -3V when on index)

PCW wrote: halmeter signal spindle-index-enable
halcmd sets spindle-index-enable 1

Actually needs to be
I think. At least I always loadusr halmeter rather than calling it directly.

Does the encoder count up in M3 and down in M4 mode?