Electric-powered lubricator, and method for dispensing lubricant from electric-powered lubricator

An electric-powered lubricator comprising:

• a first manual switch configured to be manually operated by a user of the electric-powered lubricator;
• an electric motor configured to generate a driving force;
• a drive circuit configured to drive the electric motor;
• a pump including a dispensing port, a chamber, and a plunger, the dispensing port communicating with the chamber, the chamber being configured to accommodate a lubricant therein, the plunger being (i) within the chamber and (ii) configured to reciprocate within the chamber by the driving force of the electric motor so as to dispense the lubricant within the chamber from the dispensing port;
• and
• a control circuit configured to perform:
• a first operation to control the drive circuit so as to rotate the electric motor at a preset rotational speed in response to the first manual switch being manually operated;
• a second operation to calculate a count of reciprocation of the plunger while the electric motor is being driven;
• a third operation to control, while the electric motor is being driven, the drive circuit such that the electric motor decelerates from the preset rotational speed in accordance with a difference between (i) a setting value and (ii) a calculated value, the setting value corresponding to a desired count of reciprocation of the plunger, the calculated value corresponding to a calculated count of reciprocation of the plunger;
• and
• a fourth operation to control the drive circuit so as to stop driving of the electric motor in response to the calculated value having reached the setting value.