Troubles to get started with SD240 Retrofit

PCW wrote:

The 7I33 can just ..., not pin-by-pin as most newer Mesa cards can do.

 

Is there a better alternative to the 7i33- just in case?

How can I get the spindle indexed?  Setup at the spindle is different- the motor encoder (G5) is just wired to the amplifier and not accessible for me, but a second encoder for threading (G2) is driven by the spindle via a toothed belt (1:1)
Signals for G2 are similar to the axes encoder signals, Ua1/Ua1*, Ua2/Ua2* and the index Ua0 single (non differential)

Mechanical Setup:

 

Wiring of G2:

 

I have the spindle running with G2 as a feedback- this works fine but I will need the index for threading.
How can I manage this?   I tried to make the index visible in HAL Scope, but can not set the "index enable" (get an error message)

The encoder G2 is connected to the 7i33 as ENC02, as said works fine for spindle feedback so far.

Sigi

I think I found most settings in linuxcnc.org/docs/html/examples/spindle.html
Lets see how far I get.
Only thing is that my encoder is a 2000 pulse encoder and in the example its a 100pulse per rev. encoder. We wills see...