Feature Request: CNC 4 axis (rotary) improvements and a Bug

[Redrum624]

🐞 feature request

Describe the improvements you'd like?

1- When using more then one bit between different carvings on the same G-Code file, pause before the next carving and prompt the bit assitant to change the bit before continuing.

2- Add the length of the bit exiting the chuck in the bit description and make Luban take into account object / machine collision. Add the length of the flutes to avoid going to depths not sutable for the bit.

3- When doing more then one carving (like removing most of material with flat end mill and finishing with V-bit carving) remove from the model what has been milled by the first carving, limiting the time carving nothing and making the process much faster.

Bug: Rotary must rewind B axis to go back to 0 degrees from the last carve to begin a new one. (can be -17000 degrees, so it takes a long time)

Solution: Check the degree number that the rotary is at on 360 degrees from the 0 of the work coordinates. something like:
( ( Math.abs( currentCord ) / 360 ) % 1 ) * 360 = newCurrentCord => rewind from newCurrentCord to the 0 of the work coordinates