Orient, modes 1 and 2 work, cannot do mode 0

This might not be the problem, but you are passing a degrees value to motion.spindle-revs, and that needs to be a 1-per-rev signal.

Note that the orient component does scaling. It expects a 0 to 360 input for the angle, but a 0 to 1 input elsewhere and has a 0 to 1 output.

I think the neatest way to home the spindle to index (which might be very useful in cases where the spindle can spin faster than the counter can manage, which need not necessarily preclude spindle-synched motion up to a limted speed) would be to add the orient component to the index-enable net.

I can imagine adding a parameter "index-delta" that is added to the current position command output in order to force the spindle to spin until the index is found.

I was suggesting modifications to orient.comp to allow this.

I get home from Lapland tonight, I might have a look into this.