Answers.Body: <p><a href="https://i.sstatic.net/GfS2X.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/GfS2X.jpg" alt="enter image description here"></a></p>
  
  <p>Here's an idea for <strong>a stop switch</strong> using a remote control and one's wrist.</p>
  
  <p><a href="https://i.sstatic.net/RfYIy.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/RfYIy.jpg" alt="enter image description here"></a></p>
  
  <p>Place your wrist on the switch to start the motor. With your hands free you're still able to carefully adjust your running gears. But what if something (or someone...) gets stuck?</p>
  
  <p><a href="https://i.sstatic.net/tTJjd.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/tTJjd.jpg" alt="enter image description here"></a></p>
  
  <p>Just lift your wrist and the motor will stop immediately. No need to quickly flick that switch on the battery box anymore. </p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-08-13T01:20:00.140Z
Answers.LastActivityDate: 2019-08-13T01:20:00.140Z
Answers.UserDisplayName: Uli
Answers.Body: <p>If your geartrain contains z24 gear you can substitute it with <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=60c01" rel="nofollow noreferrer">z24 clutch gear</a>. It has built-in safety mechanism - it would slip under certain toque and as result of this it will stop transfering motion if gears placed after it would stop or get blocked.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-08-14T10:16:43.803Z
Answers.LastActivityDate: 2019-08-18T13:35:29.760Z
Answers.LastEditDate: 2019-08-18T13:35:29.760Z
Answers.UserDisplayName: Alex
Body: <p>Recently I was building a prototype for a LEGO tank chassis and I tested it, but my finger got caught between the gears, resulting in my finger getting cut. Are there any ways to prevent that from happening?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-08-12T17:22:58.417Z
Comments.Text: You're a trooper, being able to work through the pain so you could type in this question with your mangled fingers ;)
Comments.UserDisplayName: JohnnyB
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-08-12T19:27:13.937Z
Comments.Text: You could use a/some clutch gear/s while prototyping, if you get stuck the mechanism will stop. Or some sort of push button attached to the battery box that you have to keep pressed. If you let go, the motor will stop at once.
Comments.UserDisplayName: Uli
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-08-12T21:52:30.853Z
Comments.Text: @Uli Unfortunately I have no clutch gears, and I don't really want to have a non-toggle type switch on the battery box.
Comments.UserDisplayName: technicguy1
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-08-12T22:37:35.957Z
Comments.Text: @technicguy1 Okay, I see. Anyway, can you add an image of your prototype?
Comments.UserDisplayName: Uli
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-08-13T22:27:06.967Z
Comments.Text: Do you need to put your fingers near it while the system is running?
Comments.UserDisplayName: Craig
Tags: <motor><safety>
Title: How can I prevent my finger from getting injured between gears?
UserDisplayName: technicguy1
ThreadText: # How can I prevent my finger from getting injured between gears?
  
  (Asked by: username_0 on 2019-08-12)
  
  Recently I was building a prototype for a LEGO tank chassis and I tested it, but my finger got caught between the gears, resulting in my finger getting cut. Are there any ways to prevent that from happening?
  
  **Tags:** motor, safety
  
  > **Comments:**
  > **username_1**: You're a trooper, being able to work through the pain so you could type in this question with your mangled fingers ;)  
  > **username_2**: You could use a/some clutch gear/s while prototyping, if you get stuck the mechanism will stop. Or some sort of push button attached to the battery box that you have to keep pressed. If you let go, the motor will stop at once.  
  > **username_0**: @username_2 Unfortunately I have no clutch gears, and I don't really want to have a non-toggle type switch on the battery box.  
  > **username_2**: @username_0 Okay, I see. Anyway, can you add an image of your prototype?  
  > **username_3**: Do you need to put your fingers near it while the system is running?  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_2 on 2019-08-13. Score: 4
  
  [![enter image description here](https://i.sstatic.net/GfS2X.jpg)](https://i.sstatic.net/GfS2X.jpg)
  
  Here's an idea for **a stop switch** using a remote control and one's wrist.
  
  [![enter image description here](https://i.sstatic.net/RfYIy.jpg)](https://i.sstatic.net/RfYIy.jpg)
  
  Place your wrist on the switch to start the motor. With your hands free you're still able to carefully adjust your running gears. But what if something (or someone...) gets stuck?
  
  [![enter image description here](https://i.sstatic.net/tTJjd.jpg)](https://i.sstatic.net/tTJjd.jpg)
  
  Just lift your wrist and the motor will stop immediately. No need to quickly flick that switch on the battery box anymore.
  
  
  ---
  
  ### Answer by username_4 on 2019-08-14. Score: 2
  
  If your geartrain contains z24 gear you can substitute it with [z24 clutch gear](https://www.bricklink.com/v2/catalog/catalogitem.page?P=60c01). It has built-in safety mechanism - it would slip under certain toque and as result of this it will stop transfering motion if gears placed after it would stop or get blocked.
  
  
  ---
  
  