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Q&A High-speed lifter

We have posted frequently asked questions from customers in Q&A format. Please click on the question to proceed to the answer.

Lift Master

Words in Q&Aof

technology

Q1How do you control intermediate stops?
Q2What is the repeatability of the lifter's positioning accuracy?
Q3Is it possible to set multiple lifter stop positions?
Q4I would like to operate multiple Lift Master, what is the procedure?
Q5Can a cantilever lifter perform a downward pressing operation?
Q6Cantilever lifters are freestanding, but do they need support at the top end?
Q7How long can Lift Master stroke be made?
Q8Can it be installed in any direction?
Q9I want to drive at high speeds. What is the maximum speed of Lift Master?
Q10What are some ways to lower the floor?
Q11I would like to operate Lift Master frequently, but what are the operating frequency limits?
Q12What is the allowable OHL when the center of gravity is not directly in front of Lift Master? Can it be handled if the center of gravity is located away from the OHL load curve?
Q13How much does Lift Master tip over when carrying the rated load?
Q14What is the expected lifespan of Lift Master?
Q15What is the coasting distance and stopping accuracy of Lift Master?

Support/Specifications

Q16Is DC motor drive (battery power) supported?
Q17Can you handle special lifter sizes, strokes, etc.?
Q18Are high rigidity specifications available?
Q19Is it possible to drive Lift Master with a servo motor?
Q20Can the motor mounting position and direction be changed?
Q21Can I add more position detection sensors to a cantilever lifter?
Q22Can stainless steel specifications be manufactured?
Q23Is it possible to use special grease (food-grade, low-dust type)?
Q24Can the motor voltage be doubled?
Q25Can bellows be retrofitted?
Q26Can you manufacture arms?

Usage environment

Q27Are heat-resistant specifications available? If so, what is the maximum heat resistance temperature?
Q28I would like to use it in a very clean environment. Can this be accommodated?
Q29Can it be used outdoors? Can it be exposed to water?
Q30Is cold resistant series available?
Q31Are there any heat-resistant bellows?

others

Q32How do I request a certificate of non-applicability?
回答へ
Q1How do you control intermediate stops?
A1

We recommend using a servo motor for control. For three-phase motor specifications, use the optional rotary encoder [option symbol: E].

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Q2What is the repeatability of the lifter's positioning accuracy?
A2

For a constant load, the repeatability is ±1mm.

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Q3Is it possible to set multiple lifter stop positions?
A3

By installing a servo motor or a three-phase motor with a rotary encoder [option symbol: E], it becomes possible to control stopping at multiple points.

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Q4I would like to operate multiple Lift Master, what is the procedure?
A4

There are the following methods for operating multiple units.
・With three-phase motor (inverter control)
Speed errors occur due to motor slippage, so to prevent cumulative errors, start all units at the same time and stop them using the position detection signal of each Lift Master.
- With servo motor
Servo motor control reduces variations in speed and stopping accuracy.
- Mechanical synchronization specifications
Multiple Lift Master connected by couplings are driven by a single gear motor.

Lift Master motor synchronous operation
Lift Master mechanical synchronization specifications

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Q5Can a cantilever lifter perform a downward pressing operation?
A5

In principle, pressing operations are not possible.
Depending on the application, special support may be possible.
Please fill in the "High-speed lifter Selection Request Form" or the technical sheet at the end of the catalog with your usage conditions and then contact us.

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Q6Cantilever lifters are freestanding, but do they need support at the top end?
A6

In principle, no support is required for standard models. However, support may be required depending on the operating conditions (acceleration/deceleration, OHL, etc.).

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Q7How long can Lift Master stroke be made?
A7

The standard stroke limit is 1500mm, but we can manufacture with your desired stroke up to 2000mm after confirming the lifting load and OHL conditions.
Strokes over 2000mm can be manufactured depending on the conditions of use, so please contact us. *As the stroke becomes longer, the amount of tilt of Lift Master also increases, so please contact us for more information.
*The structure of Lift Master is basically the same as the standard specification up to a stroke of 2000 mm, but it may differ depending on the load conditions, so please contact us for details.

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Q8Can it be installed in any direction?
A8

The standard specification is floor installation only.
The load is only applied downward (vertically).
If you require horizontal installation or hanging installation, please contact us as special arrangements are required. * Lift Master cannot be used for pressing and stopping.

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Q9I want to drive at high speeds. What is the maximum speed of Lift Master?
A9

For standard specifications/U speed, the maximum speed is 150mm/s with a three-phase motor and 166mm/s with a servo motor.
If you require higher speed operation with inverter control, please contact us. We will consider the allowable speed based on the lifting load, speed, and operating cycle conditions.
In addition, by changing the screws and drive units to suit the required speed as a "high-speed specification," it is possible to achieve speeds up to 500 mm/s. *The appearance of Lift Master differs from the standard specification due to increased rigidity, so please contact us for details.
*Sudden acceleration and stopping may result in a decrease in stopping accuracy and vibration of the workpiece. When operating at high speeds, allow for acceleration and deceleration times and perform soft starts and soft stops.

Lift Master high speed specification

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Q10What are some ways to lower the floor?
A10

To make it easier to bring the lower limit of the arm closer to the floor, the motor can also be installed at the top.
However, compatibility will be determined based on the balance between Lift Master body and the motor, so please contact us for more information.
In addition, a "low-profile specification" that reduces the height of Lift Master itself is also available.
This specification is effective when there are height space restrictions.*The mechanism of the "low profile specification" is significantly different from the standard, so please contact us for details.

Lift Master low-floor model

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Q11I would like to operate Lift Master frequently, but what are the operating frequency limits?
A11

The allowable Percentage duty cycle * of the standard Ball screw type is 30%ED.
Higher frequency operation is also possible. We will consider this based on the operating conditions (lifting load, speed, operating cycle, OHL load, ambient temperature, expected life).
The allowable load rate for Trapezoidal Screw is 20% ED or less. *High frequency applications differ from the standard specifications, so please contact us for details.
* Percentage duty cycle %ED indicates the percentage of operation time in one cycle.Percentage duty cycle %ED = "operation time" / "operation time + stop time" x 100

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Q12What is the allowable OHL when the center of gravity is not directly in front of Lift Master? Can it be handled if the center of gravity is located away from the OHL load curve?
A12

If the center of gravity is within the arc of the overhang, the allowable OHL can be determined from the OHL load curve.
If the standard specifications exceed the allowable OHL, we can provide a special "high rigidity specification" with a reinforced guide. *The appearance of the high rigidity specification Lift Master differs from the standard specification due to the increased rigidity.

Lift Master high rigidity specification

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Q13How much does Lift Master tip over when carrying the rated load?
A13

The table below shows the reference values for the amount of tilt at the upper stroke limit and allowable OHL.
For other strokes, please contact us.*If you want to reduce the amount of displacement, we can provide a "high rigidity specification," so please contact us.

(Reference value: standard specifications)
*The above values are for Lift Master alone and do not take into account the rigidity of the arm or installation surface.

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Q14What is the expected lifespan of Lift Master?
A14

The expected lifespan of Lift Master is determined by the expected running life of the screws.

Trapezoidal Screw type (LMEM)

The expected life span is determined when the total travel distance reaches 5km, regardless of the lifting load (reference value).

Ball screw type (LMEB)

The lifespan of Ball screw is determined by flaking caused by fatigue on the rolling surface. Please check the approximate lifespan in the graph below.
However, if there is a lot of impact or if proper lubrication and maintenance are not performed, the expected travel distance will be significantly reduced.

Expected travel distance (km) = Actual load stroke (m) × frequency of use (times/day) × number of operating days/year × 10-3 × expected years

The expected lifespan varies depending on the lifting load.
If the load fluctuates significantly during the stroke, calculate the equivalent load using the following formula.

PM = PMIN + 2 × PMAX3

P M: Equivalent load N P MIN: Minimum load N P MAX: Maximum load N

・This graph shows travel distance based on the L10 life of Ball screw (the life that 90% or more of the total will reach).
- If there are many impacts or if proper lubrication and maintenance are not performed, the expected travel distance will be significantly reduced.
・If a longer life is required, we will consider changing Ball screw to suit the load conditions.

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Q15What is the coasting distance and stopping accuracy of Lift Master?
A15

The coasting distance and stopping accuracy when descending are as follows: LMEB0200H: Coasting distance: approx. 1.5 mm / Stopping accuracy: approx. ±0.5 mm
· LMEB0500H ... Coasting distance: Approx. 1.3mm / Stopping accuracy: Approx. ±0.4mm
· LMEB1000H ... Coasting distance: approx. 1.1 mm / Stopping accuracy: approx. ±0.4 mm Because the lifting speed is fast in H speed and U speed, please use inverter control to set acceleration and deceleration times.
The above values are guidelines when the inverter is used to slow down (6Hz) and then stop.
Brake wiring is assumed to be AC external operation, and the relay time lag is assumed to be 0.03 seconds. *The coasting distance and stopping accuracy values will vary depending on the wiring method and speed, so please contact us for details.
*If you require higher stopping accuracy, please consider using a servo motor.

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Q16Is DC motor drive (battery power) supported?
A16

It may be possible depending on the conditions of use.
Please fill in the "High-speed lifter Selection Request Form" or the technical sheet at the end of the catalog with your usage conditions and then contact us.

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Q17Can you handle special lifter sizes, strokes, etc.?
A17

Special support is available depending on the conditions of use.
Please fill in the "High-speed lifter Selection Request Form" or the technical sheet at the end of the catalog with your usage conditions and then contact us.

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Q18Are high rigidity specifications available?
A18

Special support is available depending on the conditions of use.
Please fill in the "High-speed lifter Selection Request Form" or the technical sheet at the end of the catalog with your usage conditions and then contact us.

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Q19Is it possible to drive Lift Master with a servo motor?
A19

Ball screw type LMEB comes standard with a servo motor.

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Q20Can the motor mounting position and direction be changed?
A20

The motor mounting direction can be changed as an option. [Option code: D1 to D3]
For changes to the motor mounting position, please contact us by filling out the "High-speed lifter Selection Request Form" or the technical sheet at the end of the catalog with your usage conditions.

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Q21Can I add more position detection sensors to a cantilever lifter?
A21

As an option, position detection sensors (option symbols: [L1 to L3]) are available.
The standard product is equipped with four position detection sensors (two for S speed only), and additional 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.

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Q22Can stainless steel specifications be manufactured?
A22

It is possible to change some parts (other than strength components) such as the cover to stainless steel.

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Q23Is it possible to use special grease (food-grade, low-dust type)?
A23

Yes, we can. Please fill in the "High-speed lifter Selection Request Form" or the technical sheet at the end of the catalog with your usage conditions and contact us.

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Q24Can the motor voltage be doubled?
A24

As an option, a 400V motor voltage (option symbol: V) is available.

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Q25Can bellows be retrofitted?
A25

It cannot be retrofitted. When considering the product, please also consider whether or not you need bellows.

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Q26Can you manufacture arms?
A26

Special requests are possible. Please fill in the "High-speed lifter Selection Request Form" or the technical sheet at the end of the catalog with your usage conditions and contact us.

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Q27Are heat-resistant specifications available? If so, what is the maximum heat resistance temperature?
A27

This will vary depending on the conditions of use (temperature, operating frequency, load), so please contact us for details.

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Q28I would like to use it in a very clean environment. Can this be accommodated?
A28

Because Lift Master has an open structure, cleanliness cannot be guaranteed, but we can take measures to reduce dust generation from each part. Raydent treatment (ball screw guide)
Stainless steel cover
Clean grease application (ball screw and guide)
Baked paint

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Q29Can it be used outdoors? Can it be exposed to water?
A29

Lift Master is designed for indoor use and is not intended for use in locations where it may come into contact with water.
If water droplets or other liquids are present, you will need to provide a cover on your equipment or take special measures such as the following: Opposite opening: Lift Master 's opening is located on the opposite side of the conveying surface, preventing water from entering from the conveying surface.
- With front bellows [option code: J]: Bellows are provided at the opening to prevent water droplets from getting in. *The "reverse opening" and "with front bellows" specifications have a different structure from the standard, so please contact us for details.
*Since Lift Master has an open structure, the above specifications are a simple drip-proof structure and do not guarantee waterproofness.

Lift Master bellows specifications

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Q30Is cold resistant series available?
A30

Special support is available depending on the conditions of use.
Please fill in the "High-speed lifter Selection Request Form" or the technical sheet at the end of the catalog with your usage conditions and then contact us.

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Q31Are there any heat-resistant bellows?
A31

Heat-resistant specifications are not available.
However, we can accommodate bellows made from special materials, so please contact us.

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Q32How do I request a certificate of non-applicability?
A32

Please request a non-applicable certificate through your point of purchase.

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