Different set up but same physics apply. I was called out to a cold forming press which basically was hammering an enormous load onto billets of steel to form panels for the automotive industry.
The problem on inspection: The drop press was producing inconsistent strikes, especially noticeable when working with thicker steel billets. The machine seemed to struggle during the initial drop phase, and there was an unusual amount of sparking observed near the motor’s commutator. This problem was consistent with poor commutator maintenance and misalignment or excessive vary to the variable angle brush set up.
Whilst the motor was spinning the commutator was cleaned, after shut down the brushes were replaced and adjustaded to the optimal position ensuring they’re neither advanced nor retarded. By correctly adjusting the brush angle, it restored the proper phase relationship between the armature current and the stator’s magnetic field. This adjustment improved torque production during the drop phase, reduced electrical arcing, and enhanced overall motor efficiency.
In brushed DC motors, the brush angle determines the timing of current delivery to the armature windings. An advanced brush angle means that current is supplied earlier in the rotation cycle, which can increase torque at higher speeds but may cause excessive current draw and heating at lower speeds.
Conversely, a retarded brush angle delays current delivery, potentially reducing torque and efficiency under load.
The problem on inspection: The drop press was producing inconsistent strikes, especially noticeable when working with thicker steel billets. The machine seemed to struggle during the initial drop phase, and there was an unusual amount of sparking observed near the motor’s commutator. This problem was consistent with poor commutator maintenance and misalignment or excessive vary to the variable angle brush set up.
Whilst the motor was spinning the commutator was cleaned, after shut down the brushes were replaced and adjustaded to the optimal position ensuring they’re neither advanced nor retarded. By correctly adjusting the brush angle, it restored the proper phase relationship between the armature current and the stator’s magnetic field. This adjustment improved torque production during the drop phase, reduced electrical arcing, and enhanced overall motor efficiency.
In brushed DC motors, the brush angle determines the timing of current delivery to the armature windings. An advanced brush angle means that current is supplied earlier in the rotation cycle, which can increase torque at higher speeds but may cause excessive current draw and heating at lower speeds.
Conversely, a retarded brush angle delays current delivery, potentially reducing torque and efficiency under load.