In the maintenance of a recent supermarket project, the fire shutter door cannot fall to the bottom at one time (about 20 cm from the ground) when it falls. You need to press the "fall" button again to fall to the bottom. This situation has nothing to do with the limit switch, mainly because the roller shutter is not set correctly.

跟大家分享一下濟南卷簾門限位的調節：

First of all, let's share the adjustment of Jinan roller shutter threshold:

防火卷簾門限位動作演示視頻如下所示，觀察限位開關的動作變化及限位調節輪的移動變化。

The demonstration video of fire shutter threshold action is shown below. Observe the action change of limit switch and the movement change of limit adjusting wheel.

從視頻中可以看出，卷簾限位的控制，是由轉軸上兩個小輪左右碰觸微動開關來實現的。

It can be seen from the video that the control of roller shutter limit is realized by two small wheels on the rotating shaft touching the microswitch.

防火卷簾門

Fireproof rolling shutter door

兩個限位調節輪在左右移動的過程中，觸動兩個微動開關。（注意，卷簾的上限位盡量不要隨便調，或者要謹慎調節）

When the two limit adjustment wheels move left and right, they touch two microswitches. (note that the upper limit of the roller shutter should not be adjusted casually or carefully)

卷簾下限位調節方法：

Lower limit adjustment method of roller shutter:

要確定哪個是下限位的控制開關（將卷簾升到頂部，觀察哪個微動開關處于“動作”狀態，則該開關為上限位開關，另一個位下限位開關。這個不需要死記硬背。）

First, determine which is the lower limit control switch (raise the roller shutter to the top and observe which microswitch is in the "action" state, then the switch is the upper limit switch and the other is the lower limit switch. This does not need to be memorized.)

剛才找到了下限位開關，距離該開關更近的調節輪就是我們需要調整的。（調節輪距離下限位開關越近，下限位開關動作越提前，那么卷簾就越早的停止下降，即卷簾下降的距離短；反之，卷簾下降的距離越長）

Just now we found the lower limit switch. The adjusting wheel nearest to the switch is what we need to adjust. (the closer the adjusting wheel is to the lower limit switch, the earlier the action of the lower limit switch is, the earlier the rolling shutter stops falling, that is, the shorter the falling distance of the rolling shutter; on the contrary, the longer the falling distance of the rolling shutter.)

防火卷簾門

Fireproof rolling shutter door

比如卷簾下降距離太大，這時候我們需要讓卷簾提起一點時間停止，那么將這個調節輪向靠近限位開關的方向移動即可，具體操作：

For example, the falling distance of the roller shutter is too large. At this time, we need to lift the roller shutter for a little time to stop. Then move the adjusting wheel to the direction close to the limit switch. The specific operation is as follows:

1、手動下降卷簾到合適位置停止。

1. Manually lower the roller shutter to the appropriate position to stop.

2、松開調節輪的固定螺絲，靠近限位開關方向移動，位置使限位開關“恰好”動作即可，擰緊調節輪固定螺絲即可。

2. Loosen the fixing screw of the adjusting wheel and move it close to the limit switch to make the limit switch "just" act. Tighten the fixing screw of the adjusting wheel.

3、升起卷簾，然后手動下降，觀察設定的位置是否合適。

3. Raise the roller shutter, then lower it manually, and observe whether the set position is appropriate.

卷簾上限位的調節方法是相同的，需要注意的是上限調節不可太靠上，避免卷簾卷入卷軸，需要謹慎操作！

The adjustment method of the upper limit of the roller shutter is the same. It should be noted that the upper limit adjustment should not be too close to avoid the roller shutter from being involved in the reel. It needs to be operated carefully!

希望以上關于防火卷簾門控制上限和下限的方法，能夠幫助到大家，如果您有關于防火卷簾門的問題，歡迎咨詢我們。

I hope the above methods for controlling the upper and lower limits of fire shutter doors can help you. If you have any questions about fire shutter doors, please consult us.