Jump to content
Sign in to follow this  
corngolem

The blue ghost effect

Recommended Posts

Posted · The blue ghost effect

Turn off and unplug your printer, then move the extruder on one axis fast enough. The LED of the extruder and the LCD of the controller will light up !

I assume it is because the motors act as dynamos. Did you ever notice ?!

 

Share this post


Link to post
Share on other sites
Posted · The blue ghost effect

I have noticed this as well haha good name for it. I figured it probably wan't so good so I don't do it intentionally but it is kind of cool

 

Share this post


Link to post
Share on other sites
Posted · The blue ghost effect

i was cleaning the rods with sowing maschine oil and spotted that in the dark... scary... ;-)

Ian

 

Share this post


Link to post
Share on other sites
Posted · The blue ghost effect

Yeah, I've seen this and I find it very odd.... It indicates that there are no flyback diodes on the motors which is simply bad design. Motors should always have flyback diodes to prevent damage to the sensitive bits of silicon...

However, I thought that the motor controllers we use had integrated diodes on the chips so external ones should not be needed... And it's also strange that it's able to find a path all the way back to power up the LED on the TC amplifier board...

In any case, I wouldn't worry too much... Those motors can generate surprisingly large voltages across sensitive parts meant for 5v only.... But if there was a serious problem with it then we would have people complaining about blown electronics all the time. There must be enough resistances and protection in the circuit to prevent damage to the sensitive bits of silicone. I always move my head by hand and don't concern myself with it too much.... I've not had an issue yet nor have I heard of anyone damaging their electronics this way.

Cheers,

Troy.

 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

  • Our picks

    • Ultimaker Cura 4.0 | Stable available!
      Ultimaker Cura 4.0 is mainly focused on the improved user interface and cloud integration.
      As always, we want to collect your user feedback for this release. If there are any improvements you can think of, feel free to mention it here and help us to shape the next release.
      • 20 replies
×
×
  • Create New...

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!