How do you know the needle will not go too deep?
The SOMARK Labstamp uses a computer controlled positioning system to move the needle relative to the surface of the tail. The surface of the tail is fixed by the tail bed and tail cover. The length of the needle and needle cartridge are manufactured to a specific length. When the needle cartridge is attached to the tattooing machine, the needle penetration depth is mechanically controlled similar to a piston and cylinder in an auto engine. The depth of penetration is fixed by the mechanical design of the system to reach the dermis and go no further.