There are two kinds of printing machine for capsules AP-III and RPD-4. Difference of the two is the printing location/direction on capsules.
AP-III don’t have capsule orientation function. Printing location/direction on capsules will be random. Example, the logo may be printed on the capsule cap, or capsule body.
RPD-4 has orientation function. All the capsules to be printed will be on same direction before going to the printing station. If the logo are supposed to be printed on the capsule caps, then logo will always be printed on capsule caps on all the capsules.
Click here to find more information of RPD-4 capsule printing machine.