"Thud" on every 3rd or 4th layer

[idegani]

Hi Formlabs,

On my most recent print job, I started noticing a fairly pronounced jerking motion after every layer. Please take a look at the short video below. At the 0:24 second mark, you can hear the thud, and the build platform jerks upwards. This happens around every 4th layer or so.

http://tinyurl.com/form2-thud

Is this normal, or should I be concerned? The printer appears to be working fine despite the thuds. Have you seen this before? I don’t recall seeing it on earlier prints so I just wanted to make sure.

Thanks!
Ismail

[adriantanner]

This seems normal to me. If you start seeing artifacts in your prints or your parts start detaching from supports, you should contact support and cite this video.

[idegani]

Great, thanks! FYI it stopped happening on the subsequent print jobs. And the part came out great.

[mjncad]

My Form2 does that now and then too. It’s disconcerting; but so far I haven’t noticed any problems with my prints.