Beware tip-forming is not supported with the OAMS. Trying to use it will lead to nothing but dissapointment, grief, and general despair.
In order to make the OAMS work with your printer, you will need to have some way to cut the filament before each filament swap.
In the past, other solutions, such as ERCF, have used methods like tip forming. Tuning tip forming has proved fraught with errors and a major source of headches and jams in the ERCF. Any change to hotend, length, or otherwise leads to new tuning of the tip forming parameters. These factors are the reasons bambulab printers include a filament cutter in their toolheads.
For Vorons, if using the Stealthburner, we can recommend the excellent filametrix mod
If using dragonburner, Chirpy has created a cutter designed for it.
If using an EVA style toolhead with an orbiter, this is a cutter designed for it.
If using XOL, xol-metrix is a solution for that toolhead.