https://padlet.com/shirin_lau_hk/1v21r82o25e9 夢想從不應失敗擱淺 en-us 2019-02-20 06:40:45 UTC 2025-09-27 17:07:24 UTC hello@padlet.com https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/333056229 2019-02-20 06:43:56 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/333056229 shirin_lau_hk https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/333057562 2019-02-20 06:52:46 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/333057562 shirin_lau_hk https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/333511657 雖然失敗了，可是我們發現：
1. 齒輪⚙️下面需要有物件固定🧷

2. 要扣住



]]> 2019-02-21 06:58:54 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/333511657 shps184107 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/336275553 1.鐵吸管太重2.齒輪太慢3.動力不夠4.齒輪要大。]]> 2019-02-28 06:55:53 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/336275553 shirin_lau_hk https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/336276957 可以運作，不過清潔的效果不確認

]]> 2019-02-28 07:04:22 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/336276957 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/340724376 2019-03-13 06:23:34 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/340724376 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/340724580 https://www.youtube.com/watch?v=eyqwLiowZiU]]> 2019-03-13 06:25:11 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/340724580 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/340725873 器機心玩具]]> 2019-03-13 06:35:05 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/340725873 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/340729451 步進馬達定位和速度控制都很精確，無需使用反饋傳感器。 ... 透過定子(stator) 和轉子(rotor) 中磁場間的相互作用，步進馬達的轉子會產生扭矩(torque)。 磁場的強度與發送到定子的電流量成正比，也和繞組中的匝數成正比。 步進馬達原理也涉及了磁鐵的操作理論，在提供電脈衝時，使馬達軸轉動一段精確的距離。Sep 27, 2018]]> 2019-03-13 07:00:22 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/340729451 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/340729779 Stepper motors provide a means for precise positioning and speed control without the use of feedback sensors. The basic operation of a stepper motor allows the shaft to move a precise number of degrees each time a pulse of electricity is sent to the motor. Since the shaft of the motor moves only the number of degrees that it was designed for when each pulse is delivered, you can control the pulses that are sent and control the positioning and speed. The rotor of the motor produces torque from the interaction between the magnetic field in the stator and rotor. The strength of the magnetic fields is proportional to the amount of current sent to the stator and the number of turns in the windings.

The stepper motor uses the theory of operation for magnets to make the motor shaft turn a precise distance when a pulse of electricity is provided. You learned previously that like poles of a magnet repel and unlike poles attract. Figure 11-57 shows a typical cross-sectional view of the rotor and stator of a stepper motor. From this diagram you can see that the stator (stationary winding) has four poles, and the rotor has six poles (three complete magnets). The rotor will require 12 pulses of electricity to move the 12 steps to make one complete revolution. Another way to say this is that the rotor will move precisely 30° for each pulse of electricity that the motor receives. The number of degrees the rotor will turn when a pulse of electricity is delivered to the motor can be calculated by dividing the number of degrees in one revolution of the shaft (360°) by the number of poles (north and south) in the rotor. In this stepper motor 360° is divided by 12 to get 30°.

When no power is applied to the motor, the residual magnetism in the rotor magnets will cause the rotor to detent or align one set of its magnetic poles with the magnetic poles of one of the stator magnets. This means that the rotor will have 12 possible detent positions. When the rotor is in a detent position, it will have enough magnetic force to keep the shaft from moving to the next position. This is what makes the rotor feel like it is clicking from one position to the next as you rotate the rotor by hand with no power applied.

]]> 2019-03-13 07:02:26 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/340729779 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/345562367 清㓗器（參考）]]> 2019-03-27 06:54:40 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/345562367 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/345562496 2019-03-27 06:55:52 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/345562496 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/345562504 2019-03-27 06:55:55 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/345562504 shirin_lau_hk https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/345593296 2019-03-27 09:10:55 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/345593296 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/345995856 https://cloud.tencent.com/developer/article/1115946]]> 2019-03-28 06:25:02 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/345995856 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/345997111 https://cloud.tencent.com/developer/article/1115946]]> 2019-03-28 06:36:52 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/345997111 shirin_lau_hk https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/348389932 為了之後的電腦繪圖課程，同學們請按照我們之前學的齒輪理論和實驗設計清潔器的3D圖。]]> 2019-04-04 07:06:53 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/348389932 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/357923156 齒輪]]> 2019-05-08 06:29:59 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/357923156 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/357923240 2019-05-08 06:30:29 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/357923240 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/357923342 2019-05-08 06:31:00 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/357923342 shps184107 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/357930713 we improved ]]> 2019-05-08 07:05:35 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/357930713 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/358347814 鍛鋼
鋼材的韌性好，耐衝擊，還可以通過熱處理或化學熱處理改善其力學性能及提高齒面硬度，故最適應於用來製造齒輪，常用的是含碳量在(0.15～ 0.6)%的碳鋼或合金鋼。對於既是高速、重載又要求尺寸小、品質小的航空用齒輪，就都用性能優良的合金鋼來製]]> 2019-05-09 06:52:03 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/358347814 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/358348506 鍛鋼
鋼材的韌性好，耐衝擊，還可以通過熱處理或化學熱處理改善其力學性能及提高齒面硬度，故最適應於用來製造齒輪，常用的是含碳量在(0.15～ 0.6)%的碳鋼或合金鋼。對於既是高速、重載又要求尺寸小、品質小的航空用齒輪，就都用性能優良的合金鋼來製造。]]> 2019-05-09 06:55:28 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/358348506 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/358349145 鋼材的韌性好，耐衝擊，還可以通過熱處理或化學熱處理改善其力學性能及提高齒面硬度，故最適應於用來製造齒輪，常用的是含碳量在(0.15～ 0.6)%的碳鋼或合金鋼。對於既是高速、重載又要求尺寸小、品質小的航空用齒輪，就都用性能優良的合金鋼來製造。]]> 2019-05-09 06:58:55 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/358349145 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/358349313 鋼材的韌性好，耐衝擊，還可以通過熱處理或化學熱處理改善其力學性能及提高齒面硬度，故最適應於用來製造齒輪，常用的是含碳量在(0.15～ 0.6)%的碳鋼或合金鋼。對於既是高速、重載又要求尺寸小、品質小的航空用齒輪，就都用性能優良的合金鋼來製造。]]> 2019-05-09 06:59:43 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/358349313 https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/358349499 鋼材的韌性好，耐衝擊，還可以通過熱處理或化學熱處理改善其力學性能及提高齒面硬度，故最適應於用來製造齒輪，常用的是含碳量在(0.15～ 0.6)%的碳鋼或合金鋼。對於既是高速、重載又要求尺寸小、品質小的航空用齒輪，就都用性能優良的合金鋼來製造。]]> 2019-05-09 07:00:39 UTC https://padlet.com/shirin_lau_hk/1v21r82o25e9/wish/358349499