A cap magazine (2, 2 1, 43, 43 1, 83, 83 1) for providing electrode caps (6, 6 1) at a pick-up position in an output area (14, 14 1, 54, 54 1, 94, 94 1) for picking up by a welding arm, wherein the cap magazine (2, 2 1, 43, 43 1, 83, 83 1) comprises an interior (18, 18 1, 62, 62 1, 101, 101 1), in which electrode caps (6, 6 1) can be arranged, and an axle (12, 12 1, 52, 52 1, 92, 92 1) around which the electrode caps (6, 6 1), which are adapted to be arranged in the interior (18, 18 1, 62, 62 1, 101, 101 1), are movable in a direction of rotation around the axle (12, 12 1, 52, 52 1, 92, 92 1) towards the pick-up position, comprises the electrode caps (6, 6 1), which are adapted to be arranged in the interior (18, 18 1, 62, 62 1, 101, 101 1), are preloaded in the direction of rotation around the axle (12, 12 1, 52, 52 1, 92, 92 1) towards the pick-up position, wherein the interior (18, 18 1, 62, 62 1, 101, 101 1) is delimited by a base plate (3, 3 1, 44, 44 1, 84, 84 1), a lid (5, 5 1, 46, 46 1, 86, 86 1) and an at least partially circular-cylindrical jacket (4, 4 1, 45, 45 1, 85, 85 1) of the cap magazine (2, 2 1, 43, 43 1, 83, 83 1), characterised in that the axle (12, 12 1, 52, 52 1, 92, 92 1) comprises, at a first end thereof, an adapter device (13, 13 1, 53, 53 1, 93, 93 1), the first end projecting beyond the interior (18, 18 1, 62, 62 1, 101, 101 1) through the lid (5, 5 1, 46, 46 1, 86, 86 1), the cap magazine further comprising a housing (10, 10 1, 50, 50 1), which is arranged outside the interior (18, 18 1, 62, 62 1) on the lid (5, 5 1, 46, 46 1) and through which the axle (12, 12 1, 52, 52 1) extends at least partially, a second end (32, 32 1, 73, 73 1, 102, 102 1) of the axle (12, 12 1, 52, 52 1, 92, 92 1), whose cross-section is larger than a cross-section of an axle hole of the axle (12, 12 1, 52, 52 1, 92, 92 1) provided in the base plate (3, 3 1, 44, 44 1, 84, 84 1), projects beyond the base plate (3, 3 1, 44, 44 1, 84, 84 1), the base plate (3, 3 1, 44, 44 1, 84, 84 1) having provided thereon a locking plate (33, 33 1, 76, 76 1, 103, 103 1) with an opening, wherein the second end (32, 32 1, 73, 73 1, 102, 102 1) and the opening being each configured such that the second end (32, 32 1, 73, 73 1, 102, 102 1) is adapted to be accommodated in the opening in form-fit engagement therewith, wherein a wheel (23, 23 1, 65, 65 1, 112, 112 1), which is arranged around the axle (12, 12 1, 52, 52 1, 92, 92 1) in the interior (18, 18 1, 62, 62 1, 101, 101 1), comprises a plurality of recesses (25, 25 1, 67, 67 1) along a circumference of the wheel (23, 23 1, 65, 65 1, 112, 112 1), a preloadable spiral spring (26, 26 1, 68, 68 1, 106, 106 1) is arranged around the axle (12, 12 1, 52, 52 1, 92, 92 1), the spiral spring being configured to rotate the wheel (23, 23 1, 65, 65 1, 112, 112 1) in the direction of rotation about the axle (12, 12 1, 52, 52 1, 92, 92 1), the electrode caps (6, 6 1), which are adapted to be arranged in the interior (18, 18 1, 62, 62 1, 101, 101 1), being thus preloaded in the direction of rotation around the axle (12, 12 1, 52, 52 1, 92, 92 1) towards the pick-up position. the electrode caps (6, 6 1), which are adapted to be arranged in the interior (18, 18 1, 62, 62 1, 101, 101 1), are preloaded in the direction of rotation around the axle (12, 12 1, 52, 52 1, 92, 92 1) towards the pick-up position, wherein the interior (18, 18 1, 62, 62 1, 101, 101 1) is delimited by a base plate (3, 3 1, 44, 44 1, 84, 84 1), a lid (5, 5 1, 46, 46 1, 86, 86 1) and an at least partially circular-cylindrical jacket (4, 4 1, 45, 45 1, 85, 85 1) of the cap magazine (2, 2 1, 43, 43 1, 83, 83 1), characterised in that the axle (12, 12 1, 52, 52 1, 92, 92 1) comprises, at a first end thereof, an adapter device (13, 13 1, 53, 53 1, 93, 93 1), the first end projecting beyond the interior (18, 18 1, 62, 62 1, 101, 101 1) through the lid (5, 5 1, 46, 46 1, 86, 86 1), the cap magazine further comprising a housing (10, 10 1, 50, 50 1), which is arranged outside the interior (18, 18 1, 62, 62 1) on the lid (5, 5 1, 46, 46 1) and through which the axle (12, 12 1, 52, 52 1) extends at least partially, a second end (32, 32 1, 73, 73 1, 102, 102 1) of the axle (12, 12 1, 52, 52 1, 92, 92 1), whose cross-section is larger than a cross-section of an axle hole of the axle (12, 12 1, 52, 52 1, 92, 92 1) provided in the base plate (3, 3 1, 44, 44 1, 84, 84 1), projects beyond the base plate (3, 3 1, 44, 44 1, 84, 84 1), the base plate (3, 3 1, 44, 44 1, 84, 84 1) having provided thereon a locking plate (33, 33 1, 76, 76 1, 103, 103 1) with an opening, wherein the second end (32, 32 1, 73, 73 1, 102, 102 1) and the opening being each configured such that the second end (32, 32 1, 73, 73 1, 102, 102 1) is adapted to be accommodated in the opening in form-fit engagement therewith, wherein a wheel (23, 23 1, 65, 65 1, 112, 112 1), which is arranged around the axle (12, 12 1, 52, 52 1, 92, 92 1) in the interior (18, 18 1, 62, 62 1, 101, 101 1), comprises a plurality of recesses (25, 25 1, 67, 67 1) along a circumference of the wheel (23, 23 1, 65, 65 1, 112, 112 1), a preloadable spiral spring (26, 26 1, 68, 68 1, 106, 106 1) is arranged around the axle (12, 12 1, 52, 52 1, 92, 92 1), the spiral spring being configured to rotate the wheel (23, 23 1, 65, 65 1, 112, 112 1) in the direction of rotation about the axle (12, 12 1, 52, 52 1, 92, 92 1), the electrode caps (6, 6 1), which are adapted to be arranged in the interior (18, 18 1, 62, 62 1, 101, 101 1), being thus preloaded in the direction of rotation around the axle (12, 12 1, 52, 52 1, 92, 92 1) towards the pick-up position.