Body: <p>This is the Gonk Droid from set 75253 Boost Droid Commander:
  <a href="https://i.sstatic.net/viPA5.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/viPA5.jpg" alt="Gonk Droid"></a></p>
  
  <p>The accessories for the third mission "defending the Falcon" have been added.</p>
  
  <p>The right arm can punch and shoot a "laser beam".</p>
  
  <p>However the left arm can only move the saw blade up and down.</p>
  
  <p>I would like for the blade to spin AND the arm to move up or down.
  Is this feasible?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-09-24T10:25:24.283Z
Comments.Text: That saw blade only has a hole for a pin, that makes it hard to transfer a rotating motion to it.
Comments.UserDisplayName: Henrik supports the community
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-09-24T10:42:57.383Z
Comments.Text: I think blade rotation can be achieved with some friction based solution: 1) a rubber wheel spinning a blade; 2) using a friction pin for a blade. The main challenge here is to transfer rotating motion to the blade. However it isn't clear if there is enough place to store the motors and connection ports for the motors.
Comments.UserDisplayName: Alex
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-09-24T11:53:25.053Z
Comments.Text: @Alex, there's an internal motor from the boost move hub. It's not the intention to add an additional motor. It's indeed the intention to rotate the saw by friction.
Comments.UserDisplayName: Michael Verschaeve
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-09-25T10:38:18.773Z
Comments.Text: @MichaelVerschaeve Do you want him to move around with a spinning saw blade, or have it spinning when his arm goes down?
Comments.UserDisplayName: Uli
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-10-01T17:15:41.080Z
Comments.Text: @Uli, when the arm goes down (in reverse I suppose when the arm goes up). Movement (legs) is by the external motor in this set
Comments.UserDisplayName: Michael Verschaeve
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-10-14T14:59:03.570Z
Comments.Text: If you are ready to commit such blasphemy, then gluing a small weight on the edge of the blade would result in the blade swinging or even making complete turns when the arm is moved up and down, depending on the acceleration of the arm movement.
Comments.UserDisplayName: zovits
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-12-25T18:09:16.307Z
Comments.Text: FWIW this was in fact an intentional decision by Lego - they were concerned what some children could create with s spinning blade, especially since some of those motors are capable of quite some speed and torque.
Comments.UserDisplayName: htmlcoderexe
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-12-25T18:28:19.010Z
Comments.Text: Hi htmlcoderexe. Interesting remark, would you happen to have a source for that information (a link perhaps) ?
Comments.UserDisplayName: Michael Verschaeve
Tags: <technic><star-wars><boost>
Title: Gonk droid spinning saw blade
UserDisplayName: Michael Verschaeve
ThreadText: # Gonk droid spinning saw blade
  
  (Asked by: username_0 on 2019-09-24)
  
  This is the Gonk Droid from set 75253 Boost Droid Commander:
  [![Gonk Droid](https://i.sstatic.net/viPA5.jpg)](https://i.sstatic.net/viPA5.jpg)
  
  The accessories for the third mission "defending the Falcon" have been added.
  
  The right arm can punch and shoot a "laser beam".
  
  However the left arm can only move the saw blade up and down.
  
  I would like for the blade to spin AND the arm to move up or down.
  Is this feasible?
  
  **Tags:** technic, star-wars, boost
  
  > **Comments:**
  > **username_1**: That saw blade only has a hole for a pin, that makes it hard to transfer a rotating motion to it.  
  > **username_2**: I think blade rotation can be achieved with some friction based solution: 1) a rubber wheel spinning a blade; 2) using a friction pin for a blade. The main challenge here is to transfer rotating motion to the blade. However it isn't clear if there is enough place to store the motors and connection ports for the motors.  
  > **username_0**: @username_2, there's an internal motor from the boost move hub. It's not the intention to add an additional motor. It's indeed the intention to rotate the saw by friction.  
  > **username_3**: @username_0 Do you want him to move around with a spinning saw blade, or have it spinning when his arm goes down?  
  > **username_0**: @username_3, when the arm goes down (in reverse I suppose when the arm goes up). Movement (legs) is by the external motor in this set  
  > **username_4**: If you are ready to commit such blasphemy, then gluing a small weight on the edge of the blade would result in the blade swinging or even making complete turns when the arm is moved up and down, depending on the acceleration of the arm movement.  
  > **username_5**: FWIW this was in fact an intentional decision by Lego - they were concerned what some children could create with s spinning blade, especially since some of those motors are capable of quite some speed and torque.  
  > **username_0**: Hi username_5. Interesting remark, would you happen to have a source for that information (a link perhaps) ?  
  
  ---
  
  ## 0 answers
  
  