I did ring you back and explained what I had found and you asked me to put it all down in an email which you would foward to the manufacturer.
This I did on the 10/06/13 and enclosed a short video on which the sound could be heard.
The next day I saw your email address was @denford.ltd.uk not @denford.co.uk so I fowarded it to that address just to be sure.
Here is the text of the email
Quote:
Further to our telephone conversation here is a summary of the problem I am having with my new 3D printer.
After about 3 prints my printer started making a noise when moving through set positions on the platform axis.
As per your suggestion I removed the build plate and cover to check if something on the belt mechanism was catching.
This appears not to be the case but the knock noise occures at 4 positions and in each case the stepper motor is in the same rotational position.
Further if you place your finger on the end of the stepper motor shaft you can feel knock as though there was a fault in the stepper motor bearing.
Attached is a short piece video so you can hear the noise.
As I said it does not appear to effect the quality of the print but it is a bit anoying and I am worried that it might get worse
As stated above the same knock has now developed on the head axes which again happens at four positions along the travel.
Looking back at the email I notice that the enclosed video was 42Mb long so may be your system does not allow such large emails.
Just added
I have just shot a new video to demonstrate the problem unfortunately the head didn't go far enough left and the table didn't come far enough forward
for the 4th click but you can get the idea.
http://youtu.be/yHJZ7S_IZVw