Lift capacity system for lifting machines
A lift machine includes a machine chassis, a boom extending from the machine chassis, and a connector extending from the boom for coupling to a load. The machine further includes a control system that determines a lift capacity of the machine based on a skew of the connector caused by the load.
1. A lift machine, comprising:
a machine chassis;
a boom extending from the machine chassis;
a connector extending from the boom for coupling to a load; and
a control system that determines a lift capacity of the machine based on a skew of the connector caused by the load, wherein the skew of the connector is a position fore, aft, or roll with respect to a plum line associated with the connector.
2. The lift machine of claim 1 , wherein the lift capacity is further based on a position of a counterweight of the lift machine.
3. The lift machine of claim 2 , wherein the lift capacity is further based on a first fore, aft, and roll position of the chassis.
4. The lift machine of claim 3 , wherein the lift capacity is further based on an overhang of the boom and the load.
5. The lift machine of claim 1 , wherein the lift machine is a pipelayer machine.
6. The lift machine of claim 5 , further including a sensing system for determining the skew of the connector.
7. The lift machine of claim 6 , wherein the sensing system includes an IMU sensor, a camera-based sensor, or an angular sensor.
8. The lift machine of claim 5 , further including a display on the machine that displays the lift capacity of the machine.
9. The lift machine of claim 5 , wherein the lift capacity corresponds to a lifting capacity of the machine before the machine begins to tip.
10. A method for determining a lift capacity of a lift machine, the lift machine including a chassis, a boom extending from the chassis, and a connector extending from the boom for coupling to a load, the method comprising:
sensing information including
a fore, aft, and roll position of the chassis;
an angle of the boom;
the load coupled to the connector;
a skew of the connector based on the load; and
determining a lift capacity of the machine based at least on the sensed information.
11. The method of claim 10 , wherein the sensing information further includes sensing a position of a movable counterweight of the lift machine.
12. The method of claim 11 , wherein the skew of the connector is based on a position of the connector with respect to a plum line of the connector.
13. The method of claim 12 , further including outputting an indication of the determined lift capacity on a display of the lift machine.
14. The method of claim 13 , wherein the lift machine is a mobile pipe layer machine.
15. The method of claim 14 , wherein the skew of the connector includes a pitch skew and a roll skew.
16. A mobile pipelayer machine, comprising:
a machine chassis;
a boom extending from the machine chassis;
a movable counterweight extending from the machine chassis;
a connector extending from the boom for coupling to a load; and
a control system including a controller that receives information indicative of
a fore, aft, and roll position of the chassis;
a position of the counterweight;
an angle of the boom;
the load coupled to the connector;
a skew of the connector based on the load; and
wherein the control system determines a real-time lift capacity of the machine based at least on the information.
17. The mobile pipe layer machine of claim 16 , further comprising a display outputting an indication of the determined lift capacity.
18. The mobile pipe layer machine of claim 16 , further including a sensing system that determines the information.
19. The mobile pipe layer machine of claim 18 , wherein the sensing system includes a sensor that determines a pitch and roll skew of the connector with respect to a plum line of the connector.