How to tell mini electric hoist performance

Mini electric  wire rope hoist  products workshop interior often use lifting tools, but also the home of choice for heavy lifting, mini electric hoist, small size, light weight facilitate installation, operation and lifting stability. Users at the time of purchase, according to the following distinguished miniature electric hoist quality and performance.
1, click the up and down keys to observe the running interval, the interval is smaller miniature gourd better.
2, mini electric hoist body shell or high strength die-cast aluminum body stretching.lever hoist Extrusion molding thin-walled precision manufacturing. Have an independent transmission system, sealed inside two coaxial transmission gear mechanism, the use of long-life oil bath lubrication system.
3, miniature gourd with DC electromagnetic disc brake, brake torque, smooth, fast, low noise.
4, mini electric  lift hoist  control after power up and down and move around, observe the arrow keys are accurate, running up and down at the same time pay attention to rest, is there a brake sound, while looking after repose, when there is decline in the chain, if so, that friction plate over loose, or not installed properly.

The smooth wire rope electric hoist

Wire rope lifting equipment as the main connectors, directly affects the quality of the use of equipment, at present, the domestic electric  chain block  is mainly used in glossy rope, the following details.
Smooth wire rope is usually caused by a few strands sub rope twisted around the core with a rope made ​​of crane and lifting operations are used in glossy rope round cross-section. Hemp rope core core material, asbestos core wire cores. Hemp core use most. According to the manufacturing process technology around the twist number of different bundles of wire rope can be divided into single rope around the twist, double twist around Smooth Smooth wire rope and wire rope triple twist around three categories.
Smooth double twist around the wire,lever hoist and wear resistance because of its moderate around, lifting up the dish operations are widely used. Double twist steel wire rope around the wire twisted into shares in accordance with the direction and strands twisted into rope F Shun to be divided into different rope around the smooth, glossy text wrapping around the bright wire rope and hybrid species.
        With electric hoist the increasing use of time, equipment except wearing parts, easily damaged wire rope part, to remind the majority of users, the use of electric wire rope hoist  to pay attention to the equipment before and after the inspection, if found damaged or abnormal parts, please replacement parts or contact the manufacturers to solve.

Wet work environment requirements for use of electric hoist

Under normal circumstances in wet environments hoist, requiring no more than 85% humidity, electric  wire rope hoist  protection rating of IP44, but with the use of the growing number of requests and the field, continues to improve, more and more occasions humidity more, such as nuclear power plants, as well as with high-pressure water washing dust pollution edge nuclear devices and other occasions, in this case using the electric hoist protection must be increased, therefore, electric hoist motor and electrical protection class IP55 equipment should be transported and Health, the following details for you, humid working environment hoist requirements.
First, in a wet environment, for 10kw electric hoist and trolley  should be noted that the above increase preheated drying device. Secondly, if it is in the open air hoist operations, especially on the electrical motors and other hardware should be additional rain cover to prevent rain and other factors cause the motor to burn other failures.
About electric hoist used in a wet environment is mainly required above two points,hoist equipment consult carefully before use requirements and precautions to ensure safe use.

Flip method of construction hoist floating roof tank

In recent years, electric  wire rope hoist  is used for the construction of floating roof tank gradually frequently choose to use electric hoist for floating roof tank construction, because it is its applicability, especially electric hoist flip-law in this area to better highlight its advantages.

Flip electric hoist has obvious advantages and applicability, especially for floating roof tank construction, upgrading flip method is used 10,000 m3 external floating roof tanks, floating roof tank construction requires high maintenance inconvenience, under normal circumstances selecting slow smooth gourd work.
Electric hoist flip method is more secure, stable, easy to adjust, enhance each lap siding completed just 3-5min.hoist equipment No aerial, safe and reliable construction, welding tank wall were carried out on the ground, the boss low intensity, there is no need to use heavy lifting equipment (crane). Applicability of the construction without water restrictions. Easy control panel tank geometry deformation and ensure the accuracy, thereby ensuring the panel welding quality and avoid water-filled suits and other process is not conducive to control panel (especially thin) deformation of the shortcomings. Floating roof phased production, has little effect on the tank construction, ease of cross-operation of each process and pipeline operations, electric  lever hoist  flip method to improve the efficiency of labor and equipment, machinery efficiency.

Flexible wire rope electric hoist lowering

Wire rope electric  wire rope hoist  he most frequently appearing as an accessory, but scrapped wear situation is more common, the following Detailed elastic rope electric hoist lowering standards for discarding.

The rope hoist for slight damage, especially when all of the strands in a good balance of stress in the usual test methods may not be displayed clearly. However, this may cause damage to the rope strength is greatly reduced. Therefore, the discovery of subtle damage to any internal inspection should be carried out, be identified. Once found damaged, the rope should be scrapped.
In some cases, chain block the elastic rope is significantly reduced. If you continue to use, there will be security risks. Elastic rope reduction is difficult to find, the elasticity generally mainly in: rope diameter decreases; rope pitch elongation; pressed against each other due to various parts, wire and between reducing the gap between strands; strands recess appeared fine brown powder. Although not found broken wire, but obviously difficult to bend wire rope. Its diameter is reduced due to wear than simply reduced diameter due to faster. This situation will result in a rope under dynamic loading sudden rupture, it should be immediately scrapped.
Tips, whether newly purchased or wire rope hoist electric hoist is in use,wire rope winch before use, after they need to check the status of the rope, such as abnormal, should immediately stop replacement wire rope to continue using.

220 volt mini electric hoist Precautions

    220 volt mini electric hoist with most close to people's lives, especially in the agricultural sector,hoist equipment which replaces the traditional human transmission work, then at 220 V mini electric hoist when we should pay attention to what matters, in order to avoid the use of improper failure to introduce you to the following.
         1, the formal product comes with instruction manual, you read carefully before use.
         2, mini electric hoist is installed to meet the requirements, the installation in the ease of operation of the occasion.
         3, lifting not stayed, oblique lifting heavy objects,wire rope winch and this is all hoist avoid point.
         4, mini electric hoist work, forbids any person standing beneath the heavy lifting.
         5, please use wear thick gloves to avoid rope slip from the hands glide cause injury or stabbed.
         6, micro hoist and wire rope hoist is very similar to the use of this is to ensure that at least 3 on the rope drum circle wire rope,wire rope hoist wire rope to prevent excessive force detached from the rope drum.
         7, do not arbitrarily modify or welded mini electric hoist parts.
         8,220 volt mini electric hoist shall not in any way carry people.
         9, do not overload use.
         10, regular inspection hoist is firmly installed.
         11, the operator not to drinking, drug use, etc. operate the lifting equipment.

Electric hoist brake problems how to deal with

Electric hoist brake failure is more common,manual hoist technical staff based on years of practice experience, brake failure is due mainly to a few points:
1, brake failure:
(A) the brake pads wear cladding serious or large loss;
(2) Long stroke solenoid is stuck;
(3) the moving core and the horizontal connecting rod between the lever off;
(4) electro-hydraulic thrusters or hydraulic solenoid does not operate;
(5) the main spring failure or damage;
(6) electrical failure and so on.
2, the braking force is insufficient.
(A) the brake pads or brake wheel cladding excessive wear;
(2) there are small pieces of cladding partial loss;
(3) the main spring tune too loose;
(4) Activities hinges which are catching or excessive wear of parts;
(5) caused by loose nut adjustment lever loose and so on.
3, the brake can not be loose brake.
(1) The hinge points are stuck not rotate;
(2) The main spring tension adjustment too large;
(3) electro-hydraulic thrusters lack of oil or hydraulic oil cylinder solenoid or air is not exhausted;
(4) coil or rectifier elements burning,lever hoist low voltage or line failure.
4, easy to disengage the brakes adjusted position.
(A) the main spring adjustment too loose;
(2) electro-hydraulic thrusters working stroke adjustment Debu meet the technical requirements.
These are on the main  wire rope hoist  brake failure, hope to help you.

Two-speed electric hoist performed using six criteria

PK two-speed electric  wire rope hoist  lifting capacity of 125 kg to 2000 kg, with a single-speed and two-speed two speeds, PK two-speed electric chain hoists are widely used in machinery manufacturing, electronics, automotive, shipbuilding and high-tech industrial areas and other modern industrial, perform the following criteria should be used to ensure safety.
One, should be carefully checked before starting hoist equipment mechanical, electrical, wire rope, hanging clamp, stopper, etc. is intact and reliable.
Second, not to overload lifting.manual hoist Lifting of hand grip on the rope and objects allowed the question.
Three, two-speed electric hoist lifting an object, you must observe safety procedures rigger hook. Should be securely tied, the object should be located at the cusp gap liner protection.
Fourth, the use of trailer wire electrical switch starter. Insulation must be good. Properly pushed the button, operation,hoist and trolley attention standing position.
Five, monorail hoist the corner or near the rail track at the end, you must slow down operation.
Six, where there are operating room must have a two-speed electric hoist hand operation,manual block strict compliance with the relevant safety traffic engineering gold rules.

Horizontal and vertical hanging hanging plate lifting clamp difference

    Plate lifting clamp called "steel clamp" is divided into two kinds of cross hanging and vertical hanging.wire rope hoist Cross hanging plate lifting clamp with horizontal distribution characteristics of lifting, lifting operations, the horizontal lifting clamp mouth pop, caught in the weight to be on the job, open, should weight the ground, the no-load case remove the steel clamp. Vertical lifting steel hanging clamp with self-locking device,lever hoist safe and reliable. Clamping speed, high efficiency. Rail clamp made ​​of high quality alloy steel, safe and reliable, fixed hanging beams, rail width adjustment quick and easy clip.
         Plate lifting clamp is mainly used in: railway, construction, metallurgy, ports, power, petrochemical, mining, automobile manufacturing, plastics machinery, pipelines and auxiliary set, slope tunnels, wells and control protection, salvage, ocean engineering, bridges, aviation, aerospace, venues and other important industries,manual hoist and infrastructure construction machinery and equipment.

Explosion-proof electric hoist large degree of common components, interchangeability

        Proof  wire rope hoist  used in flammable gas or vapor and air form explosive gas mixture. Explosion-proof electric hoist is mainly divided into three and four full-explosion-proof motor, explosion-proof electric hoist is disassembled by a number of components can be individually composed, the use of flexible, easy to maintain and repair is very convenient, and can shorten the repair time period, large degree of component commonality, interchangeability.
        Explosion-proof electric motor by a  lever hoist ,  explosion-proof control box, control buttons, and other related accessories are separate flameproof important structural composition. Explosion-proof electric hoist reducer standard modulus cylindrical gear, so ease of maintenance. Reel is running up and down lifting hoist rope to tighten up one of the most important parts. Guide rope helped  manual hoist  can be a good play to its superior performance. Explosion-proof hoist a large degree of component commonality, interchangeability.

Crane wire rope maintenance points to note

(1) the period of use rope and use of a great relationship,wire rope hoist it should be done according to the requirement to use, not drag, throw, allowed the use of overload, are not allowed to take place at an acute angle to make rope bent down drastically changed not allowed speed, to avoid shock loads;
(2) when the rope with rust and grime with a wire brush to and oiled;
(3) use of four months each rope oiled once oiled is best to use hot oil (50 ℃ or so) soaked rope core, and then wipe off excess grease;
(4) should be placed after a good rope disc clean, dry place,wire rope winch not overlapping stacked to prevent sprains;
(5) ends with a wire rope fastened or low melting point alloy weld, can also be used hoop hoop tight, so as not to loose rope;
(6) use, if the surface of the oil droplets extruded wire rope, wire rope has expressed considerable force to bear,rope hoist then increase the load should stop and check, if necessary, replaced with new wire rope.

Lifting and weighing technology

     In recent years, the experts pointed out, material handling engineering technology is a modern industrial weakest, the most urgent need to address one of the areas, but it is also the most potential,hoist equipment the most promising areas. Proposed material handling technology is the third profit source concept. Material handling machinery usually includes lifting machinery, transport machinery, handling machinery, warehousing machinery, industrial handling vehicles and hydraulic machinery of 6 categories of products. In my country, material handling machinery commonly called lifting and transport machinery. Since lifting has many varieties, strong function, the role of other characteristics, in material handling machinery in a dominant position, is the first application of weighing technology material handling machinery.
Weighing technology in lifting machinery application history. Lifting machinery (such as: electric hoist) is a kind of intermittent operation mode of the material for lifting, moving down and horizontal handling equipment. In order to make the crane during the completion of the job at the same time to be hanging materials weighing,wire rope winch people consequent lifting machinery fitted in the ideas and aspirations of the weighing device.
Lifting applications weighing technology history over 200 years. In Munich Bavaria BIPM, the preservation of a 1780 weighing about loads wall hanging spring balance; there is a station in Hamburg in 1760 fixed jib jib crane, which is equipped with a 1858 top decimal scale manufacturing. In the first half of the 19th century, cranes (crane) scales on the "Swedish ship scale" is famous for the name. In 1932, a crane with a sling scale errors have been able to reach either a load of less than 0.2%, resulting in a type approval.
From 1986 onwards weight limiter first advent of the end of 2006 to create about 200 million yuan of sales value, and even national standards legislation have proved the fact that not only the starting weight limiter manufacturer has brought huge economic benefits also produced an extensive and far-reaching social benefits.
Currently, a new generation of large-scale and efficient crane electrical control device has been developed for all-electronic digital control system,wire rope hoist in particular the application of modern industrial weighing technology has become involved in material handling lifting decisive parameters obtained during an important measurement part, is effective in creating the basis for the third profit source and protection.

How to reduce the incidence of crane accidents

How to reduce crane safety incidents, as the crane inspectors, we think it should be from the following aspects: First,wire rope hoist as soon as possible (Amendment) comply with the current lifting machinery industry production, installation and use requirements and to adequately consider synchronized with the international common technical standards, such as "crane safety regulations" amendments should consider lifting mechanism brake control, adequate use of electrical braking brake assist feature to protect the brake.
    Second is to encourage co-production in our country and foreign lifting machinery, the introduction of advanced technology to improve the technological content of lifting machinery and safety performance and the overall level of manufacturing of lifting machinery.
    Third is to strengthen supervision and management of lifting machinery industry to crack down on illegal production and beyond the scope of lifting machinery. In terms of policy to those high-tech and high safety performance lifting machinery manufacturers tilted out or shutting down some of the low-tech, low-security,lever hoist carried out by low-cost competition in the market of enterprises, encourage enterprises to introduce lifting machinery manufacturing tech talent, especially the control aspects of personnel, on lifting machinery for a new concept of design.
    Fourth, strict quality supervision departments at all levels of operations personnel authorized training assessment, particularly the use of the Internal operational management skills to strengthen job training, highlighting the persons responsible for enterprise safety production responsibility system, strengthen the main person in charge of special equipment safety awareness, standardize operations personnel processes, enterprises engaged in special operations personnel to improve safety awareness and promote the implementation of the use of units lifting equipment at point inspection management.
    Five is due to its long-term supervision and inspection of lifting after the completion of the implementation of the supervision and inspection, the inspection according to the new regulations for the installation process of supervision and inspection of all inspectors to be changing attitudes, improve the professional level. Theoretically inspection regulations to strengthen the study and understanding and knowledge of manufacturing, the weak link in the installation process, in order to develop practical guidance documents for inspection work,manual hoist to ensure test quality. On this basis, for the previous installation of lifting machinery in the next periodic inspection process inspection regulations addition to routine inspections, but also targeted to check the installation, manufacture easy to bring safety hazards and defects link, increased use of advanced detection means test items necessary to prevent accidents.
    Six is ​​to advocate lifting machinery used in construction site supervision, inspection and supervision using communication barrier approach to management, to ensure that there are security risks of construction crane without rectification in place should not be allowed to continue to put into use.

Electric hoist way to promote and noise fault solutions

Electric  lift hoist  so that our country in this field and construction mechanization level of civilization has a greatly improved. From the early promotion of do not know, do not understand, do not use to this day in the cities of the construction industry has become an indispensable prerequisite equipment for the industry thought and understanding is a great improvement; domestic hoist manufacturing and leasing industry mushrooming development of the country's manufacturing enterprises no less than dozens of gourd, annual production had over 10,000, in the world, can also be called gourd production big country. Moreover, in the  wire rope hoist  structure, technology, technology has been greatly improved and enhanced. Meanwhile reach cantilever beam structure is the way, the stability of its force far less now widely used zipper-style lightweight and stable. Nevertheless, China's manufacturing industry in the technology gourd, structure, process and even the materials are to improve and enhance the space. Abnormal noise occurs in the control loop, making noises, typically contactor fails to deal with fault contactor maintenance, overhaul can not be replaced, treatment, self-noise elimination.hoist equipment Motor makes any abnormal noise, immediately stop, single-phase operation, the entire issue of regular motor suddenly strong suddenly weak hum; while bearing damage when near the bearing and shaft couplings errors, or when the motor slightly sweep chamber, when not accompanied by shrill voice. In short, the difference should be based on the noise, to find fault, for itemized repair and restore normal performance of the motor when the motor fault untreated,load chain prohibit the use of gourds. First determine reducer gearbox or bearing on whether to raise the oil prior to use, whether to use periodic replacement of oil, but also excessive wear or damage to the gears and bearings.

Electric hoist cut down from over regulation failure analysis

When the electric hoist fell down when braking distance exceeds specified requirements, electric wire rope hoist  long-term application, the brake ring wear is too large, the brake spring pressure decreases, the braking force is reduced. The workaround is to adjust the brake bolt or replace the brake ring. Motor temperature is too high should first check whether the overload to use Hulu, overload the motor heat, long-term overload the motor will burn; should also check whether the motor is required duty work, which is one of the reasons causing motor heating, motor running, the brake gap is too small, not fully disengaged, have a great friction,manual hoist friction heat, while also representing an increase of additional load, the motor speed is reduced, the current becomes large fever, you should stop working, re-adjust the brake clearance. Weight rose to the air, can not re-start after stopping the system first checks whether the voltage is too low or too volatile, pay attention to the three-phase motor operation phase, after the shutdown can not start, then you need to check the power phases. Can not stop or limit position to stop this type of situation is still not generally contactor contact welding, when you press the stop switch when the contactor contacts can not be disconnected, the motor running as usual energized, hoist without stopping; to the limit locations such as limit malfunction,hoist and trolley Hulu does not stop. After stopping, repair contactors or stopper, serious damage can not be repaired and must be replaced. Winter construction, especially after the snow, the circuit no fault motor still does not start, the reason is the brake ring frozen to death, if this Shihai forcibly boot, it is easy to burn the motor. Rope only on no less than the reason for the stroke limiter damaged, replace stroke limiter.

Distinguish the quality of electric chain hoist observe the arrow keys, etc.

We certainly do not remember how electric chain  lift hoist  should be installed today will tell you how to install the electric chain hoist, so that we can be more understanding of the electric chain hoist, also at the time of purchase to know its structure, so as to better law and order to its quality.

Electric chain hoist is often used inside the workshop lifting tool, this small volume, light weight, easy installation, operation and lifting hoists are very stable, has begun to replace bulky electric hoist, electric and CD Hulu will slowly be replaced. In the purchase of electric chain hoist before.

Can be distinguished according to the following quality electric chain hoist, first after power control electric  wire rope hoist  to move around and observe the arrow keys are correct, while paying attention to running up and down stops, if there is the sound of brakes, another stop watching after the chain have declined, and if so, that friction plate too loose, or not installed properly. After these there is no problem, click the up and down keys, observing run distance, the smaller the distance the chain hoist as possible. Use Tips: In some factories or workshops, sometimes you need to run relatively small distances, such as installation or butt,wire rope winch you need to hoist slowly raised or lowered to facilitate calibration and installation, but single-speed electric chain hoist majority, two-speed sometimes slow speed of installation can not meet, this time you can press the button a little way, that tap stopped, time is very short, so that relatively small range of movement can be calibrated after every click once, and so on, will equipment installation was successful. This is why the choice of electric chain hoist when lifting point distance by checking the reason, in principle, the landing distance as small as possible.

Explosion-proof electric hoist control box button using internationally accepted arrow logo symbols

Explosion-proof electric hoist  wire rope hoist  is more common but a rather special, mainly reflected in the "explosion" word, and from this we can see the word on the product's main performance, we detail below explosion-proof electric wire rope hoist is the electronic control system.


Explosion-proof hoist electric control system consists of boxes, explosion-proof button control box, explosion off the fire limiter components. Explosion-proof electrical equipment enclosure securely closed Explosion levels to meet the appropriate requirements of its internal functions and ordinary hoist electrical installations basically the same.
Explosion-proof hoist box internal electrical components are of high quality, reliability and long life of Siemens low-voltage electrical components, minimize failure due to explosion-proof electrical box out of the box number. In addition to the control box to run the opposite direction contactors with electrical interlocking between the outer button button control box is provided with a mechanical interlock between avoid misuse caused by short circuit happening.
Control button box with a fine wire hanging in the explosion-proof lift hoist  box under the ground about 1.5m away from the high position to facilitate personnel. Reset button box with a rotary-type mushroom head type emergency stop switch, convenient in case of emergency, the motor stops running fast.
Button on the control box using the arrow mark internationally accepted symbols and safety AC 36V control voltage. Limiter off the fire-proof control box by the limiter and external guide rods.
Wire rope on the drum Fairlead Card pusher rod thereby triggering the limiter control box contact action,hoist and trolley to cut off the electrical power lifting. By adjusting the position of the guide rod hit the block, you can set the upper and lower limit position gourd, but must ensure that when the hook reaches the lower limit rope on the drum 2 laps still left margin.

Do not overload electric wire rope hoist operation

We buy it regardless of lifting products imported or brand, or some unknown manufacturers, must act according to certain rules, otherwise even better quality, but also very easy to damage danger, then the following to several people said  wire rope hoist  operation five elements of it.

1, the operation of lifting equipment must be a trained professional.
2 can not be manned.
3, can not throw things down from above.
4, can not collide with each other.
5, Do not overload.
Each lifting equipment are basic requirements of these points.
      Metallurgy electric  rope hoist  mounted on the beam orbit lifting heavy objects, and can make along the rail lines, curves reciprocating motion, to ensure adequate security. Adapted to the no fire, explosion and aggressive media in the work environment is suitable for lifting and transporting molten metal and in hazardous workplaces,lever hoist dual brake does not allow removing a brake use.

Two-speed electric hoist inspection before use

a. within walking distance of the operator's line of sight range, the weight should be no route through obstacles and floating debris.
b. Manual button up and down, left and right direction of action should be accurate and sensitive,lever hoist motor and gear should be no abnormal noise.
c. brakes should be sensitive and reliable.
d. electric hoist orbit should be no foreign matter.
e. vertical limiter action should be accurate and sensitive.
f. hook retainer nut should be tightened securely.
g. hook in the horizontal and vertical direction of rotation should be flexible.
h. hook pulley should be flexible rotation.
i. rope should be no obvious cracks,lift hoist neatly arranged on the roll, no disengage the pulley groove, chaotic twisting, folding clasp and other signs of good lubrication.
j. hanging aids no anomalies.
k. electric hoist working environment temperature -25 ~ +40 ℃
l. electric hoist does not apply to corrosive gases or relative humidity greater than 85% of the sites, not a substitute for proof hoist,Wire rope hoist not lifting the molten metal or toxic, flammable and explosive materials.

Stage upside down electric hoist lifting and running

Stage electric wire rope hoist  lifting weights and running from the car when improper methods, swing accident will occur. The following summarizes the stage upside down for you to hoist lifting and operational aspects of common sense.
Stage electric hoist lifting hanging objects, when the chain tension should stop, stage hoist hook jitter at the direction of the hook again, identify, and lifting workers should check whether hanging objects hanging in prison, stage electric hoist lifting, do not excessive force when hanging objects from the obstacle to accelerate until after lifting speed,hoist equipment stage electric hoist lifting of hanging objects is not easy too high, generally over a secure channel up to 0.5m for the good things.

1) Chain hoist stage should be checked before use hooks, chains, etc. is good, transmission and brakes are good. Hook, chain, inverted cards are deformed, and the chain diameter wear volume of 15%, is strictly prohibited.
2) Two or more chain-stage hoist lifting the same weights, the weight should be less than the weight of each stage of the chain-type electric hoist lifting capacity allowed.
3) Chain hoist lifting chain arena not playing Twist and may not be split into single strand use.
4) Chain hoist brake pads stage to prevent contamination of grease.
5) Chain hoist not to overload the stage, lifting capacity 5t allow a person below the zipper, lifting capacity 5t above allows two zippers, not free to increase the number of tugs, operation,lift hoist shall not stand Chain hoist just below the stage.
6) lifting heavy objects stay in the air for a long time, put your hand zip tied on chains and heavy additional insured on the rope.
7) Chain hoist stage occurred in the use of such cards chain case, the weight should be a good pad before overhaul.
Stage electric hoist the runtime not intermittent, long-distance running, it is best to run a long power transmission as well. Stage electric hoist hanging objects should be to ensure the smooth running, stage hoist hanging objects swing or if jitter should be run in the operation side edge stability hook, not let it shake or swing.