Abstract: The present disclosure provides a method for aligning a master oscillator power amplifier (MOPA) system. The method includes ramping up a pumping power input into a laser amplifier chain of the MOPA system until the pumping power input reaches an operational pumping power input level; adjusting a seed laser power output of a seed laser of the MOPA system until the seed laser power output is at a first level below an operational seed laser power output level; and performing a first optical alignment process to the MOPA system while the pumping power input is at the operational pumping power input level, the seed laser power output is at the first level, and the MOPA system reaches a steady operational thermal state.

Abstract: An embodiment of the present invention provides an elliptical trainer including structures featuring a first amplitude, a second amplitude, and a third amplitude. By the driving of cranks and the combination of the three amplitudes, the elliptical trainer's pedals move along a closed ellipse path. In addition, the first amplitude is more than twice or three times of the third amplitude, resulting in a wide adjustment range of the stride of the pedal. Accordingly, the elliptical trainer is applicable to users of various heights.

Abstract: An embodiment of the present invention provides an elliptical trainer composed of structures featuring a first amplitude, a second amplitude, and a third amplitude. By the driving of cranks and the combination of the three amplitudes, the elliptical trainer's pedals move along a closed ellipse path. In addition, the first amplitude is more than twice or three times of the third amplitude, resulting in a wide adjustment range of the stride of the pedal. Accordingly, the elliptical trainer is applicable to users with various heights.

Abstract: Embodiments of the present invention disclose an exercise machine including a supporting mechanism, two driving units, and a resistance device. The supporting mechanism supports the two driving units and the resistance device. The two driving units are respectively mounted at the left and the right side of the supporting mechanism for the user to operate. When the exercise machine is operated with a “small pace,” the resistance device is operated in both directions to eliminate the blockage when switching the operating direction of the driving units. When the exercise machine is operated with a “large pace,” the resistance device can provide resistance for the driving units in either direction.

Abstract: Embodiments of the present invention disclose an exercise machine including a supporting mechanism, two driving units, and a resistance device. The supporting mechanism supports the two driving units and the resistance device. The two driving units are respectively mounted at the left and the right side of the supporting mechanism for the user to operate. When the exercise machine is operated with a “small pace,” the resistance device is operated in both directions to eliminate the blockage when switching the operating direction of the driving units. When the exercise machine is operated with a “large pace,” the resistance device can provide resistance for the driving units in either direction.

Abstract: A climbing machine includes a resistance device, a driving device, and two climbing devices. The driving device comprises an upper wheel set, an axial wheel set, and a lower wheel set. The axial wheel set includes a first axial wheel and a second axial wheel. Through a plurality of connecting members, the alternate up and down movements of the climbing device drive the upper wheel set and the lower wheel set to rotate in a first direction, the upper wheel set drives the first axial wheel to rotate in a second direction, and the lower wheel set drives the second axial wheel to rotate in the first direction.

Abstract: An exercise machine includes a supporting mechanism, two driving units, and a resistance device. The supporting mechanism is used to support the two driving units and the resistance device. The two driving units are respectively disposed at the left and right side of the supporting mechanism for the user to operate. The resistance device can be operated in both directions to eliminate the blockage when switching the operation direction.

Abstract: An exercise machine includes a supporting mechanism, two driving units, and a resistance device. The supporting mechanism is used to support the two driving units and the resistance device. The two driving units are respectively disposed at the left and right side of the supporting mechanism for the user to operate. The resistance device can be operated in both directions to eliminate the blockage when switching the operation direction.

Abstract: This invention discloses a climbing machine. Without being limited by the structure of the climbing assembly, the upper limbs and the lower limbs of the user can have different moving paths. In addition, the climbing machine also has the advantages of rapid response, wide range of resistance adjustment, and smooth operation.

Abstract: Embodiments of the present invention disclose a climbing machine including a resistance device, a driving device, and two climbing devices. The driving device comprises an upper wheel set, an axial wheel set, and a lower wheel set. The axial wheel set includes a first axial wheel and a second axial wheel. Through a plurality of connecting members, the alternate up and down movements of the climbing device drive the upper wheel set and the lower wheel set to rotate in a first direction, the upper wheel set drives the first axial wheel to rotate in a second direction, and the lower wheel set drives the second axial wheel to rotate in the first direction.

Abstract: This invention discloses a climbing machine. Without being limited by the structure of the climbing assembly, the upper limbs and the lower limbs of the user can have different moving paths. In addition, the climbing machine also has the advantages of rapid response, wide range of resistance adjustment, and smooth operation.

Abstract: An exercise machine includes a frame, a first rotary mechanism supported on the frame, a second rotary mechanism rotatably engaging with the first rotary mechanism, and a driving mechanism operatively coupled to the second rotary mechanism and configured to impart rotation of the second rotary mechanism while the driving mechanism is being actuated. The second rotary mechanism is hubless. The second rotary mechanism is configured to absorb and retain an amount of the actuation of the driving mechanism as a moment of inertia while the second rotary mechanism rotates.

Abstract: An exercise device comprises a frame, two first swing arms, two second swing arms, two pedals, a resistance device, two cranks, two link rods, two limiting rods, and two upper linking assemblies. By arrangement of the above components, the moving path of each pedal can be an elliptical path. In some embodiment, an angle-adjustment device is used to adjust the slope of the elliptical moving path.

Abstract: An exercise machine includes a frame, a first rotary mechanism supported on the frame, a second rotary mechanism rotatably engaging with the first rotary mechanism, and a driving mechanism operatively coupled to the second rotary mechanism and configured to impart rotation of the second rotary mechanism while the driving mechanism is being actuated. The second rotary mechanism is hubless. The second rotary mechanism is configured to absorb and retain an amount of the actuation of the driving mechanism as a moment of inertia while the second rotary mechanism rotates.

Abstract: An exercise device comprises a frame, two pedals, two first swing arms, two second swing arms, a resistance device, two link rods, two cranks, two limiting rods, and a stride-adjusting device. Each first swing arm has two ends, in which one end pivotally connects to the frame, and the other connects to one second swing arm. Each second swing arm has two ends, in which one end connects to one first swing arm, and the other connects to one pedal. Each crank includes an end connecting to an axle of the resistance device and another end connecting to one link rod. Each link rod includes two ends, in which one end connects to one crank, and the other connects to an area of one second swing arm. Each pedal sildely couples with one corresponding limiting rod, and an end of each limiting rod movably couples with the stride-adjusting device.

Abstract: An exercise device is provided with a frame, two pedals, two first swing arms, two second swing arms, a resistance device, two link rods, two cranks, two limiting rods, and two roller assemblies. Each first swing arm has two ends, in which one end pivotally connects to the frame, and the other connects to one of the two second swing arms. Each second swing arm has two ends, in which one end connects to one first swing arm, and the other connects to one pedal. The resistance device has an axle. Each crank includes two ends, one end connecting to the axle, and the other connecting to one link rod. Each link rods includes two ends, one end connecting to one crank, and the other connecting to an area of one second swing arm. Each roller assembly connects to one second swing arm, and can slide along one limiting rod.

Abstract: An exercise device comprises a frame, two pedals, two first swing arms, two second swing arms, a resistance device, two link rods, two cranks, two limiting rods, and a stride-adjusting device. Each first swing arm has two ends, in which one end pivotally connects to the frame, and the other connects to one second swing arm. Each second swing arm has two ends, in which one end connects to one first swing arm, and the other connects to one pedal. Each crank includes an end connecting to an axle of the resistance device and another end connecting to one link rod. Each link rod includes two ends, in which one end connects to one crank, and the other connects to an area of one second swing arm. Each pedal sildely couples with one corresponding limiting rod, and an end of each limiting rod movably couples with the stride-adjusting device.

Abstract: An exercise device is provided with a frame, two pedals, two first swing arms, two second swing arms, a resistance device, two link rods, two cranks, two limiting rods, and two roller assemblies. Each first swing arm has two ends, in which one end pivotally connects to the frame, and the other connects to one of the two second swing arms. Each second swing arm has two ends, in which one end connects to one first swing arm, and the other connects to one pedal. The resistance device has an axle. Each crank includes two ends, one end connecting to the axle, and the other connecting to one link rod. Each link rods includes two ends, one end connecting to one crank, and the other connecting to an area of one second swing arm. Each roller assembly connects to one second swing arm, and can slide along one limiting rod.

Abstract: An exercise device comprises a frame, a rotational mechanism, a left and a right coupling mechanism, and an adjusting assembly. A post structure is upwardly extended from the front portion of the frame. The rotational mechanism is arranged at the post structure. The left and right coupling mechanisms are arranged at a side of the post, respectively. One end of the left and right coupling mechanism couples to the rotational mechanism, and the other end respectively comprise a left and a right pedal assembly making a moving path. The adjusting assembly comprises a left and a right linkage structures with two ends, in which one end couples to the post and the other end moveably couples to the left and right pedal assembly. By changing the angles between the left and right linkage structures and the post structure, the pedal assemblies are moved to determine a step distance.