The length of each manipulator has a certain curve.

　　(2)抓斗作业结构的要求是什么?抓斗作业的稳定性如何?

　　(2) What are the requirements of grab operation structure? How stable is grab operation?

　　A:在正常情况下，抓斗的前稳定性优于侧稳定性和后稳定性，即前稳定性>侧稳定性>后稳定性。没有必要对一条腿的长度做出选择。跨度越大，稳定性越好;跨度越小，稳定性越差。如果你希望运作，你必须在已采取积极的巩固天空措施后才可运作。抓斗作业中应大量使用标准臂长。

　　A: Under normal conditions, the front stability of grab is better than the side stability and the rear stability, that is, the front stability > the side stability > the rear stability. There is no need to choose the length of a leg. The larger the span, the better the stability; the smaller the span, the worse the stability. If you want to operate, you must take active measures to consolidate the sky before you can operate. Standard arm length should be widely used in grab operation.

　　(4)起始分量特性曲线是什么?如何选择具有分量特性曲线?

　　(4) What is the characteristic curve of the initial component and how to select the characteristic curve of the component?

　　答:搬运重物时，幅度变化或体积扩大操作程序错误;绕组速度过快，振幅变化大;超过规格、超过尺寸、超过动量的使用等，对提升作业的稳定性都不是必需的。在软天工作时，应使用软垫膨胀支撑力。因此，手术应彻底伸展腿部。当需要使用非标准臂长操作时，应选择与短标准臂长对应的特征曲线。或其他相关材料:桥式抓斗模型、电动单梁桥式抓斗

　　Answer: When handling heavy objects, the operation procedure of amplitude change or volume expansion is wrong; winding speed is too fast, amplitude change is large; over specification, over size, over momentum use, etc., are not necessary to enhance the stability of operation. When working in soft days, the expansion support force of cushion should be used. Therefore, the leg should be stretched thoroughly. When non-standard arm length operation is needed, the characteristic curve corresponding to the shortest standard arm length should be selected. Other related materials: bridge grab model, electric single girder bridge grab

　　答:特征曲线通常基于三个条件:稳定性、结构强度和组织强度。

　　Answer: Characteristic curves are usually based on three conditions: stability, structural strength and organizational strength.

　　(3)操作人员在起重作业中，哪些线路不需要抓斗的稳定性?

　　(3) In lifting operation, which lines do not require grab stability?

　　答:工作场所歪斜或松动可使起重机框架夹板充气，提高坚固性，应大量投入不在歪斜路面的工作中。

　　Answer: The skew or loosening of the workplace can inflate the frame splint of the crane and improve its robustness. A large amount of investment should be made in the work not on the skewed road surface.

　　(1)举升方向的选择如何影响举升作业的稳定性?

　　(1) How does the selection of lifting direction affect the stability of lifting operation?

　　2. 抓斗常识

　　2. Grab knowledge

　　(2)对电机直流继电器进行复核，然后比较容易复核二次回路，先小开关有没有跳闸?如启动开关、仓门行程开关等有问题

　　(2) Check the DC relay of the motor, and then check the secondary circuit more easily. Does the small switch trip first? For example, there are problems with the start switch, the traveling switch of the warehouse door, etc.

　　(1)零点开关不到位。主电路的一个保险丝烧坏了。主电路接触器故障或线圈烧坏。

　　(1) The zero switch is not in place. A fuse in the main circuit burned out. Main circuit contactor failure or coil burnout.

　　A:有多少原因

　　A: How many reasons are there?

　　1. 电源线没有接通的原因是什么?

　　1. What is the reason why the power line is not connected?

　　将前面的重物吊到一边时，应注意防止不稳定的翻滚。

　　When lifting the front weight to one side, care should be taken to prevent unstable rollover.