CONTROLLER FOR PARTIALLY TOOTHED GEAR MECHANISM AND IMAGE FORMATION APPARATUS

PROBLEM TO BE SOLVED: To provide a controller capable of precisely controlling a partially toothed gear mechanism regardless of variance of an individual changeover part.SOLUTION: A controller for a partially toothed gear mechanism comprises: changeover means which has an engagement member, the engagement member being set to engage the partially toothed gear mechanism in a first state and not to engage the partially toothed gear mechanism in a second state; control means of performing control to output a first instruction to place the changeover means in the first state when stopping the partially toothed gear mechanism from rotating, and a second instruction to place the changeover means in the second state when allowing the partially toothed gear mechanism to rotate; and detection means configured such that an output signal changes as the partially toothed gear mechanism starts rotating, the control means outputting the first instruction when the output signal of the detection means changes after outputting the second instruction.SELECTED DRAWING: Figure 5 【課題】切替部の個々のばらつきに拘らず、欠歯ギア機構を精度良く制御可能な制御装置を提供する。【解決手段】欠歯ギア機構の制御装置は、係合部材を有し、第１状態において前記係合部材は前記欠歯ギア機構と係合する状態に設定され、第２状態において前記係合部材は前記欠歯ギア機構と係合しない状態に設定される切替手段と、前記欠歯ギア機構の回転を停止させる場合には前記切替手段を前記第１状態にする第１命令を出力し、前記欠歯ギア機構を回転させる場合には前記切替手段を前記第２状態にする第２命令を出力する制御を行う制御手段と、前記欠歯ギア機構が回転を開始すると出力信号が変化する様に構成された検出手段と、を備え、前記制御手段は、前記第２命令を出力した後、前記検出手段の出力信号が変化すると前記第１命令を出力する。【選択図】図５