The present improved magnetic coil tattooing machine incorporates an armature assembly comprising an actuator appendage. The actuator appendage facilitates the actuation of an interrupter switch assembly that is remotely located in relation to the armature assembly. As a result of the described improvements it is now possible to adjust the activation timing of the interrupter switch assembly. An additional and unexpected advantage is a smooth homogenous operation of the interrupter switch assembly rendering the known tuning procedure of prior art obsolete.