I want to operate multiple Lift Masters. What kind of method do I need?
A4
The following methods are available for operation of multiple units. ・With a three-phase motor (inverter control) As a speed error due to motor sliding occurs, turn on all the power at the same time for starting and stop with the position detection signal of each Lift Master to prevent cumulative errors. ・With servo motor The servo motor control suppresses speed fluctuations and variations in stop accuracy. ・Mechanical synchronized specification Multiple Lift Masters connected by couplings are driven by a single gear motor.
Can cantilever lifters be used for downward pressing?
A5
In principle, downward pressing function is not available. Under certain conditions, it can be made available as MTO product. Complete the technical sheet at the end of the catalog, and contact us.
Cantilever lifters are self-supported, is an upper end holder necessary?
A6
Basically not required for standard models. However, supporter may be required depending on the operating conditions (acceleration / deceleration, OHL, etc.).
How long can the stroke of the Lift Master be produced?
A7
The maximum stroke of the standard specification is 1500 mm, but it can be manufactured with the desired stroke up to 2000 mm after checking the lifting load and OHL conditions. Strokes longer than 2000 mm can also be manufactured under certain operating conditions. Contact us for more information. ※The longer the stroke, the larger the amount of tilt of the Lift Master, so please contact us. ※The structure of the Lift Master is basically the same as the standard specification up to a stroke of 2000mm. However, it may differ depending on the load conditions. Contact us for more information.
The standard specification is floor installation only. The load receiving direction is downward (vertical direction) only. When mounting horizontally or hanging is required, contact us for special arrangement. ※The Lift Master cannot be used for pressing stop applications.
I want to drive at high speed. What is the maximum speed of the Lift Master?
A9
For standard specifications /U speed, the maximum is 150 mm/s with a three-phase motor and 166 mm/s with a servo motor. Contact us when higher speed operation is required by inverter control. Consider the allowable speed based on the operating conditions of the lifting load and speed, and the operation cycle. In addition, by changing to the optimum screw and drive unit for the required speed as a "high-speed specification", it is possible to support up to 500 mm / s. ※The appearance of the Lift Master differs from the standard specification due to increased rigidity. Contact us for more information. ※Sudden acceleration or sudden stop may result in deterioration of stop accuracy or vibration of the work. When driving at high speed, set an acceleration / deceleration time and make a soft start / soft stop.
What method is available if you want to lower the profile?
A10
In order to make the lower limit position of the arm closer to the floor, the motor can also be mounted on the top. However, the balance between the Lift Master unit and the motor will determine whether it is possible or not. Contact us for more information. In addition, "low profile specifications" that suppress the height of the Lift Master itself are also available. This specification is effective when there is space limitation of height.※The mechanism of the "low profile specification" is significantly different from the standard, so please contact us.
I would like to operate the Lift Master at a high frequency, but what is the limit on the frequency of operation?
A11
The allowable load hourly rate * of the standard ball screw type is 30% ED. Higher frequency is also possible. We will consider it according to the usage conditions (lifting load, speed, operation cycle, OHL load, ambient temperature, expected life). The allowable load rate of the trapezoidal screw is 20%ED or less. ※For higher frequency, please contact us as it differs from the standard specifications. ※The load hourly rate %ED indicates the ratio of operating time per cycle.Load hourly rate% ED = "Operating time" / "Operating time + Stop time" x 100
What is the allowable OHL when the center of gravity is not in front of the Lift Master? Can it be used even when the position of the center of gravity is away from the OHL load curve?
A12
If the position of the center of gravity is within the arc of the overhang amount, the allowable OHL can be judged from the OHL load curve. When exceeds the allowable OHL of the standard specification, special "high rigidity specifications" with reinforced guides is available. ※The appearance of the high-rigidity specification of the Lift Master differs from the standard specification due to the increased rigidity.
How much does the Lift Master fall when loaded with the rated load?
A13
The table below shows the reference values for the amount of tilt at allowable OHL at the stroke upper limit. For other strokes, please contact us.※If you want to reduce the amount of displacement, "high rigidity specifications" is available, so please contact us for more information.
The expected life of the ball screw varies greatly depending on the lifting load, speed, OHL load, operation cycle, and other conditions. If you provide the operating conditions, we will consider the expected life of the ball screw, so please contact us.
What is the coasting distance and stopping accuracy of the Lift Master?
A15
Estimates of coasting distance and stopping accuracy when descending are as follows. · LMEB0200H ... Coasting distance : about 1.5mm / Stopping Precision : about ±0.5mm · LMEB0500H ... Coasting distance : about 1.3mm / Stopping Precision : about ±0.4mm · LMEB1000H ... Coasting distance : about 1.1mm / Stopping Precision : about ±0.4mm Since the lifting speed is fast for H speed and U speed, provide an acceleration/deceleration time by inverter control for use. The above value is a guide when the inverter decelerates (6HHz) and then stops. The brake connection is made by AC external operation. The time lag of the relay is assumed to be 0.03s. ※The coasting distance and stop accuracy values will differ depending on the wiring method and speed, so please contact us. ※When higher stopping accuracy is required, consider using a servo motor.
Is the motor mounting position & direction changeable?
A20
Changing the mounting direction of the motor is available as an option. [Option symbol: D1 to D3] Contact us when changing the motor mounting position.
Is it possible to increase the number of position sensors in cantilever lifters?
A21
As an option, position detection sensors (option code: [L1 to L3]) are available. The standard product is equipped with 4 position detection sensors (2 for S speed only), and sensors can be added as an option, but the number of sensors that can be added varies depending on the speed. If you would like to add more sensors, please contact us.
I'd like to use it in a clean atmosphere. Can you handle it?
A28
The Lift Master has an open structure, so the cleanliness cannot be guaranteed. However, measures to reduce dust generation from each component are possible. · RAYDENT® (Ball screw・Guide) · Stainless steel cover · Clean grease applied (ball screw / guide) · Baking painting
Is it possible to use it outdoors? Is it okay to splash water?
A29
The Lift Master is for indoor use, so it is not intended for use in places exposed to water. If the product is exposed to dripping water, provide a cover on the customer's device or take special measures as shown below. · Opening opposite side spec.: The opening of the Lift Master is arranged on the opposite side of the conveyance surface to prevent water from entering from the conveying surface side. · With front bellows [Optional code: J] ・ ・ ・ A bellows is provided at the opening to prevent water drops from entering. ※The specifications of "Opening opposite side" and "With front bellows" have different structures from the standard, so please contact us. ※Since the Lift Master has an open structure, the above specifications are a simple drip-proof structure and do not guarantee waterproofness.