Peristaltic pump with controlled stop

A method comprising:

• providing a peristaltic pump, the peristaltic pump having:
• a pump body, a rotor configured to rotate about an axis, a first roller mounted on a first end of the rotor, a second roller mounted on a second end of the rotor, the rotor having no more than two rollers;
• inserting a section of tubing into the peristaltic pump;
• rotating the rotor about the axis, rotation of the rotor causing the first roller to transition between a disengaged, initially engaged and a fully engaged position with respect to the section of tubing and the second roller to transition between a disengaged, initially engaged and a fully engaged position with respect to the section of tubing, wherein the second roller is in the disengaged position when the first roller is in the fully engaged position, and the first roller is in the disengaged position when the second roller is in the fully engaged position;
• receiving, in a pump controller, a stop command instructing the pump controller to stop the peristaltic pump;
• monitoring, using an encoder, the position of the first and second rollers as the rotor rotates about the axis;
• and
• stopping the peristaltic pump, using the pump controller, only after (i) receiving the stop command and (ii) determining that either the first or second roller is in the fully engaged position.

A peristaltic pump comprising:

• a pump body configured to receive a section of tubing;
• a rotor configured to rotate about an axis, the rotor having a first roller and second roller and having no more than two rollers;
• the first roller mounted on a first end of the rotor and configured to rotate about a first roller axis, the first roller configured to selectively engage and disengage the section of tubing and roll along a surface of the tubing as the rotor rotates;
• the second roller mounted on a second end of the rotor and configured to rotate about a second roller axis, the second roller configured to selectively engage and disengage the section of tubing and roll along a surface of the tubing as the rotor rotates;
• an encoder, configured to monitor the position of the first and second rollers as the rotor rotates about the axis;
• and
• a rotor controller in electrical communication with the encoder and configured to control the operation of the pump and the rotor, the rotor controller configured to receive a stop command, wherein the stop command instructs the rotor controller to stop the peristaltic pump only after (i) receiving the stop command and (ii) determining that either the first or second roller is in the fully engaged position.

A method comprising:

• providing a peristaltic pump, the peristaltic pump having:
• a pump body, a rotor configured to rotate about an axis, a first roller mounted on a first end of the rotor, a second roller mounted on a second end of the rotor, the rotor having no more than two rollers;
• inserting a section of tubing into the peristaltic pump;
• rotating the rotor about the axis, rotation of the rotor causing the first roller to transition between a disengaged, initially engaged and a fully engaged position with respect to the section of tubing and the second roller to transition between a disengaged, initially engaged and a fully engaged position with respect to the section of tubing, wherein the second roller is in the disengaged position when the first roller is in the fully engaged position, and the first roller is in the disengaged position when the second roller is in the fully engaged position;
• monitoring by a pump controller, using an encoder, the position of the first and second rollers as the rotor rotates about the axis;
• receiving a stop command by the pump controller, wherein the stop command instructs the pump controller to stop the peristaltic pump;
• after receiving the stop command, determining by the pump controller whether the monitored position of either the first or second roller is in the fully engaged position;
• if it is determined that the monitored position of neither the first nor second roller is in the fully engaged position, re-determining by the pump controller whether the monitored position of either the first or second roller is in the fully engaged position;
• and
• if it is determined that the monitored position of either the first or second roller is in the fully engaged position, stopping the pump, using the pump controller.