Changing 1/4" bits and zeroing on Kobalt router till we get a sensor working.
The movement range I have measured on my unit works out to ~60mm.
This is from the top stop till the spindle lock is about to crash into the Plexiglas dust cover.
First I move the router up till it almost hits the stops, +20mm for me. From there I can remove the bit and replace it from the side. I make sure it is well extended.
With the collet nut just snugged up I lower the router 20mm pressing the bit into the spindle. Then just tighten the nut from the side. This is my zero.
If I am over a hole I slide in a sheet of plastic to give me a surface to push on.
I do miss that auto zero.